Opinion
BROWN, J. Under Code of Civil Procedure section 425.16, subdivision (b)(1),1 a defendant may move to strike any cause of action “arising from any act. . . in furtherance of the person’s right of petition or free speech under the United States or California Constitution in connection with a public issue . . . .” If the plaintiff cannot demonstrate a “probability” of prevailing on that cause of action (§ 425.16, subd. (b)(1)), then the trial court must strike the cause of action and award the defendant attorney’s fees and costs (§ 425.16, subd. (c)). In 1999, the Legislature made the denial of a special motion to strike under section 425.16 appealable. We now determine whether the perfecting of an appeal from the denial of a special motion to strike automatically stays all further trial court proceedings on the merits upon the causes of action affected by the motion. We conclude that it does.
I.
Plaintiffs and respondents Varian Medical Systems, Inc. (Varian Medical) and Varian Semiconductor Equipment Associates, Inc. (Varian Semiconductor) are publicly traded companies. Varian Medical manufactures a variety of medical products, and Varian Semiconductor manufactures equipment for use in the semiconductor chip manufacturing process. For purposes of this action, Varian Medical and Varian Semiconductor are the successors in interest to the [187]original plaintiff, Varían Associates, Inc. (Varían Associates).2 At the time of trial, plaintiff and respondent George Zdasiuk was a vice-president of Varían Medical, and plaintiff and respondent Susan Felch was a director at a Varían Semiconductor research center.
Defendants and appellants Michelangelo Delfino and Mary Day are former employees of Varían Associates. Zdasiuk fired Delfino in October 1998 for harassing Felch and other coworkers. Two months later, Day resigned in sympathy.
After leaving Varían Associates, Delfino and Day began posting numerous derogatory messages about plaintiffs on the Internet. In response, plaintiffs filed the instant action against Delfino in February 1999, alleging numerous federal and state causes of action3 and seeking injunctive and monetary relief. Delfino then removed the action to federal court. In federal court, plaintiffs added Day as a defendant in July 1999. In April 2000, the federal court granted defendants partial summary judgment on plaintiffs’ federal claim and remanded the action back to the superior court.
On remand, plaintiffs filed a third amended complaint in August 2000, alleging seven causes of action predicated on defendants’ Internet postings about plaintiffs.4 Each defendant then filed, for the first time, a special motion to strike plaintiffs’ complaint as a strategic lawsuit against public participation (SLAPP) under section 425.16 (the anti-SLAPP motions). The trial court denied the motions, finding that: (1) the motions were untimely; (2) plaintiffs’ causes of action did “not arise from ‘any act . . . in furtherance of [the] right of petition or free speech under the United States or California Constitution in connection with a public issue’ ”; and (3) plaintiffs demonstrated a “probability they will prevail on their claims.”
Defendants appealed. Delfino also filed an ex parte application with the trial court and a petition for writ of supersedeas with the Court of Appeal, seeking to stay further trial court proceedings pending resolution of the [188]appeal pursuant to section 916. The trial court denied the application, and the Court of Appeal summarily denied the petition. We also denied Delfino’s petition for review.
After a trial, the jury found defendants liable for libel, invasion of privacy (appropriation of name), breach of contract, and conspiracy, and awarded plaintiffs a total of $425,000 in compensatory damages. The jury further found that defendants acted with malice, fraud, or oppression, and awarded Zdasiuk and Felch $350,000 in punitive damages. The trial court also issued a permanent injunction against defendants.
Following the entry of judgment, the Court of Appeal dismissed as moot defendants’ appeal from the order denying their anti-SLAPP motions. Soon after, defendants appealed the judgment. The Court of Appeal modified the injunction but affirmed in all other respects. In doing so, the court disagreed with Mattel, Inc. v. Luce, Forward, Hamilton & Scripps (2002) 99 Cal.App.4th 1179 [121 Cal.Rptr.2d 794] (Mattel), and held “that Code of Civil Procedure section 916 did not automatically stay trial of the lawsuit. . . and that therefore the trial court did not lack jurisdiction to conduct the trial.” According to the court, the denial of an anti-SLAPP motion is a matter separate from the merits of the lawsuit itself, and the subsequent trial had “no direct impact on the appeal from the order” denying the motion. Thus, the courts in this case had the discretion to grant a stay but did not have to do so. Acknowledging that courts may erroneously refuse to grant a stay despite a meritorious appeal, the court nonetheless concluded “that the benefit of preventing such rare mistakes by automatically staying all trials pending an appeal from an order denying an anti-SLAPP motion is outweighed by the danger of encouraging meritless anti-SLAPP motions and appeals as trial strategy to simply delay the trial of meritorious cases.”
We granted review solely on the issue of whether “an appeal from the denial of a special motion to strike under the anti-SLAPP statute (§ 425.16) effects an automatic stay of the trial court proceedings.”
H.
Defendants contend an appeal from the denial of an anti-SLAPP motion automatically stays all further trial court proceedings on the merits. Plaintiffs counter that such an appeal does not effect an automatic stay of any trial court proceedings on the merits because those proceedings would have no affect on the appeal. According to plaintiffs, courts have the discretion to stay further proceedings but are not compelled to do so. As explained below, we agree with defendants.
[189]Subject to certain exceptions not relevant here, “the perfecting of an appeal stays proceedings in the trial court upon the judgment or order appealed from or upon the matters embraced therein or affected thereby, including enforcement of the judgment or order, but the trial court may proceed upon any other matter embraced in the action and not affected by the judgment or order.”5 (§ 916, subd. (a).) The purpose of the automatic stay provision of section 916, subdivision (a) “is to protect the appellate court’s jurisdiction by preserving the status quo until the appeal is decided. The [automatic stay] prevents the trial court from rendering an appeal futile by altering the appealed judgment or order by conducting other proceedings that may affect it.” (Elsea v. Saberi (1992) 4 Cal.App.4th 625, 629 [5 Cal.Rptr.2d 742] (Elsea).)
To accomplish this purpose, section 916, subdivision (a) stays all further trial court proceedings “upon the matters embraced” in or “affected” by the appeal. In determining whether a proceeding is embraced in or affected by the appeal, we must consider the appeal and its possible outcomes in relation to the proceeding and its possible results. “[W]hether a matter is ‘embraced’ in or ‘affected’ by a judgment [or order] within the meaning of [section 916] depends on whether postjudgment [or postorder] proceedings on the matter would have any effect on the ‘effectiveness’ of the appeal.” (In re Marriage of Horowitz (1984) 159 Cal.App.3d 377, 381 [205 Cal.Rptr. 880] (Horowitz).) “If so, the proceedings are stayed; if not, the proceedings are permitted.” (Betz v. Pankow (1993) 16 Cal.App.4th 931, 938 [20 Cal.Rptr.2d 841] (Betz).)
The fact that the postjudgment or postorder proceeding may render the appeal moot is not, by itself, enough to establish that the proceeding affects the effectiveness of the appeal and should be stayed under section 916. Rather, something more is needed. For example, the trial court proceeding must directly or indirectly seek to “enforce, vacate or modify [the] appealed judgment or order.”6 (Elsea, supra, 4 Cal.App.4th at p. 629 [“The trial court’s power to enforce, vacate or modify an appealed judgment or order is [190]suspended while the appeal is pending”].) Or the proceeding must substantially interfere with the appellate court’s ability to conduct the appeal. (See, e.g., Holloway v. Scripps Memorial Hosp. (1980) 111 Cal.App.3d 719, 723-724 [168 Cal.Rptr. 782] [holding that a pending appeal precludes the trial court from issuing an order relieving the parents as plaintiff’s guardians and appointing new counsel for plaintiff because the order interferes with the conduct of the appeal].)
A trial court proceeding also affects the effectiveness of an appeal if the possible outcomes on appeal and the actual or possible results of the proceeding are irreconcilable. Thus, an appeal from the denial of a motion to vacate a spousal support order precludes the trial court from terminating its jurisdiction over spousal support because the termination of jurisdiction is irreconcilable with possible outcomes on appeal. (See In re Marriage of Varner (1998) 68 Cal.App.4th 932, 937 [80 Cal.Rptr.2d 628].) Similarly, an appeal from an order declaring that the plaintiffs take nothing by way of deficiency after a judicial foreclosure precludes the trial court from setting aside the foreclosure, because it would permit the plaintiffs to recover a deficiency judgment notwithstanding the appeal. (See Nelson v. Orosco (1981) 117 Cal.App.3d 73, 80 [172 Cal.Rptr. 457].) And an appeal from a judgment on the pleadings precludes a trial court from granting leave to amend the complaint because affirmance of the judgment is irreconcilable with an order granting leave to amend. (Olson v. Superior Court (1969) 274 Cal.App.2d 311, 314 [79 Cal.Rptr. 136].)
Finally, a proceeding affects the effectiveness of the appeal if the very purpose of the appeal is to avoid the need for that proceeding. In that situation, the proceeding itself is inherently inconsistent with a possible outcome on appeal and must therefore be stayed under section 916, subdivision (a). Thus, an appeal from the denial of a motion to compel arbitration automatically stays all further trial court proceedings on the merits. (See Prudential-Bache Securities, Inc. v. Superior Court (1988) 201 Cal.App.3d 924, 925 [247 Cal.Rptr. 477] (Prudential-Bache).)
[191]By contrast, an appeal does not stay proceedings on “ancillary or collateral matters which do not affect the judgment [or order] on appeal” even though the proceedings may render the appeal moot. (Betz, supra, 16 Cal.App.4th at p. 938.) For example, the Legislature has established that certain proceedings, by law, are collateral to the merits of an appeal despite their potential effect on the appeal. Thus, the Legislature, through its enactments, has established that a motion for a new trial is collateral to the judgment and may proceed despite an appeal from the judgment. (See In re Estate of Waters (1919) 181 Cal. 584, 587 [185 P. 951] (Waters); see also Neff v. Ernst (1957) 48 Cal.2d 628, 634 [311 P.2d 849].) And the language and history of the lis pendens statute establish that a proceeding to expunge a lis pendens is collateral to an appeal from the judgment in the underlying action. (See United Professional Planning, Inc. v. Superior Court (1970) 9 Cal.App.3d 377, 383-386 [88 Cal.Rptr. 551] (United Professional).)
A postjudgment or postorder proceeding is also ancillary or collateral to the appeal despite its potential effect on the appeal, if the proceeding could or would have occurred regardless of the outcome of the appeal. (See Horowitz, supra, 159 Cal.App.3d at pp. 382-383 [finding no automatic stay because the result of the proceeding could have been achieved through other procedures regardless of the outcome of the appeal].) Thus, an appeal from the denial of a preliminary injunction does not stay further trial court proceedings on the merits. Because the injunction “amounts to a mere preliminary or interlocutory order to keep the subject of litigation in status quo pending the determination of the action on its merits” (Gray v. Bybee (1943) 60 Cal.App.2d 564, 571 [141 P.2d 32] (Gray)), the affirmance or reversal of its denial does not and cannot eliminate the need for additional proceedings on the merits. Section 916 therefore does not automatically stay such proceedings. (See Major v. Miraverde Homeowners Assn. (1992) 7 Cal.App.4th 618, 623 [9 Cal.Rptr.2d 237]; Gray, at p. 571.) Likewise, an appeal from an order denying a motion to disqualify counsel does not automatically stay further trial court proceedings on the merits because such proceedings would occur regardless of whether the reviewing court affirms or reverses the order. (See Reed v. Superior Court (2001) 92 Cal.App.4th 448, 453-455 [111 Cal.Rptr.2d 842] (Reed).)
With these principles in mind, we now consider whether trial court proceedings on the merits following an appeal from the denial of an anti-SLAPP motion are embraced in or affected by that appeal. We conclude they are, and such proceedings are therefore stayed under section 916, subdivision (a).
[192]We begin with the appealed order—the denial of an anti-SLAPP motion under section 425.16. Section 425.16, subdivision (b)(1) provides that “[a] cause of action against a person arising from any act of that person in furtherance of the person’s right of petition or free speech under the United States or California Constitution in connection with a public issue shall be subject to a special motion to strike, unless the court determines that the plaintiff has established that there is a probability that the plaintiff will prevail on the claim.”
Section 425.16, subdivision (b)(1) establishes “a two-step process for determining” whether an action should be stricken as a SLAPP. (Navellier v. Sletten (2002) 29 Cal.4th 82, 88 [124 Cal.Rptr.2d 530, 52 P.3d 703].) First, the court must determine “whether the defendant has made a threshold showing that the challenged cause of action” arises from an act in furtherance of the right of petition or free speech in connection with a public issue. (Ibid.) Second, the court must “determine whether the plaintiff has demonstrated a probability of prevailing on the claim.” (Ibid.) If the defendant makes a threshold showing that the cause of action arises from an act in furtherance of the right of petition or free speech in connection with a public issue and the plaintiff fails to demonstrate a probability of prevailing, then the court must strike the cause of action (§ 425.16, subd. (b)(1)) and award the defendant “attorney’s fees and costs” (§425.16, subd. (c)). Section 425.16, subdivision (j) then provides that “[a]n order granting or denying a special motion to strike shall be appealable under Section 904.1.”
The Legislature enacted section 425.16 to prevent and deter “lawsuits [referred to as SLAPP’s] brought primarily to chill the valid exercise of the constitutional rights of freedom of speech and petition for the redress of grievances.” (§ 425.16, subd. (a).) Because these meritless lawsuits seek to deplete “the defendant’s energy” and drain “his or her resources” (Simmons v. Allstate Ins. Co. (2001) 92 Cal.App.4th 1068, 1074 [112 Cal.Rptr.2d 397]), the Legislature sought “ ‘to prevent SLAPPs by ending them early and without great cost to the SLAPP target’ ” (Equilon Enterprises v. Consumer Cause, Inc. (2002) 29 Cal.4th 53, 65 [124 Cal.Rptr.2d 507, 52 P.3d 685]). Section 425.16 therefore establishes a procedure where the trial court evaluates the merits of the lawsuit using a summary-judgment-like procedure at an early stage of the litigation. (See Simmons, at p. 1073.) In doing so, section 425.16 seeks to limit the costs of defending against such a lawsuit. (See Equilon Enterprises, at p. 65 [noting that the “short time frame for anti SLAPP filings and hearings” and the “stay of discovery” pending resolution of the motion evidences the Legislature’s intent to minimize the litigation costs of SLAPP targets].)
[193]Because granting a motion to strike under section 425.16 results in the dismissal of a cause of action on the merits (see Wilson v. Parker, Covert & Chidester (2002) 28 Cal.4th 811, 821 [123 Cal.Rptr.2d 19, 50 P.3d 733] [holding that the court should grant an anti-SLAPP motion “if, as a matter of law, the defendant’s evidence supporting the motion defeats the plaintiff’s attempt to establish evidentiary support for the claim”]), an appellate reversal of an order denying such a motion may similarly result in a dismissal. Such an appellate outcome is irreconcilable with a judgment for the plaintiff on that cause of action following a proceeding on the merits. Moreover, such a proceeding is inherently inconsistent with the appeal because the appeal seeks to avoid that very proceeding. Indeed, “[t]he point of the anti-SLAPP statute is that you have a right not to be dragged through the courts because you exercised your constitutional rights.” (People ex rel. Lockyer v. Brar (2004) 115 Cal.App.4th 1315, 1317 [9 Cal.Rptr.3d 844] (Brar); see also Fabre v. Walton (Mass. 2002) 436 Mass. 517 [781 N.E.2d 780, 784] [“The protections afforded by the anti-SLAPP statute against the harassment and burdens of litigation are in large measure lost if the petitioner is forced to litigate a case to its conclusion before obtaining a definitive judgment through the appellate process”].) In this respect, an appeal from the denial of an anti-SLAPP motion is no different than an appeal from the denial of a motion to compel arbitration. (See Prudential-Bache, supra, 201 Cal.App.3d at p. 925.)
In reaching this conclusion, we reject plaintiffs’ analogy of an appeal from the denial of an anti-SLAPP motion to an appeal from the denial of a preliminary injunction (see Gray, supra, 60 Cal.App.2d at p. 571) or a motion to disqualify counsel (see Reed, supra, 92 Cal.App.4th at pp. 453-455). Neither a motion for preliminary injunction nor a motion to disqualify counsel resolves the merits of a cause of action. Thus, the granting or denying of these motions is reconcilable with any subsequent judgment on the merits. By contrast, an anti-SLAPP motion goes “to the merits of the issues involved in the main action” (Union Oil Co. v. Reconstruction Oil Co. (1935) 4 Cal.2d 541, 542-545 [51 P.2d 81]) to the extent it addresses the “probability ... the plaintiff will prevail on the claim” (§ 425.16, subd. (b)(1)). The granting of an anti-SLAPP motion is therefore irreconcilable with a judgment in favor of the plaintiff. Moreover, unlike a motion to strike under section 425.16, both a motion for a preliminary injunction and a motion to disqualify counsel contemplate further proceedings on the merits regardless of how the trial court resolves these motions. Thus, for purposes of section 916, an appeal from the denial of an anti-SLAPP motion is not analogous to an appeal from the denial of a preliminary injunction or an appeal from the denial of a motion to disqualify counsel.
The legislative history of the anti-SLAPP statutes makes this clear. Contrary to plaintiffs’ assertions, this history is undoubtedly relevant to our determination of the effect of an appeal from the denial of an anti-SLAPP [194]motion on further trial court proceedings on the merits. “ ' “The effect of an appeal from the judgment... is purely a matter of statutory regulation, to be determined by a construction of the statute under which the appeal is taken, and by the terms of which, when clear and ambiguous, we are concluded.” ’ ” (In re Lukasik (1951) 108 Cal.App.2d 438 [444, 239 P.2d 492] (Lukasik), quoting Vosburg v. Vosburg (1902) 137 Cal. 493, 497 [70 P. 473].) Thus, our courts have consistently looked to such statutes and their history for guidance in determining whether an appeal effects an automatic stay of a trial court proceeding.7
The history of the anti-SLAPP statutes confirms our conclusion that section 916 stays all further proceedings on the merits during the pendency of an appeal from the denial of an anti-SLAPP motion. In 1999, the Legislature enacted section 425.16, subdivision (j)—which makes “[a]n order granting or denying a special motion to strike . . . appealable under Section 904.1”—as part of Assembly Bill No. 1675 (1999-2000 Reg. Sess.). The Legislature found it necessary to enact subdivision (j) because, without the ability to appeal, a SLAPP “defendant will have to incur the cost of a lawsuit before having his or her right to free speech vindicated.” (Assem. Com. on Judiciary, Concurrence in Sen. Amends, on Assem. Bill No. 1675 (1999-2000 Reg. Sess.) as amended July 12, 1999, p. 2.)
As originally introduced, Assembly Bill No. 1675 provided that “[a]n order denying a special motion to strike shall be appealable under Section 904.1. Upon the filing of such an appeal, all proceedings on any cause of action which is the subject of the appeal shall be stayed unless the plaintiff demonstrates to the appellate court probable success on the appeal and that the plaintiff will otherwise sustain irreparable injury.” (Assem. Bill No. 1675 (1999-2000 Reg. Sess.) as introduced Mar. 16, 1999, p. 2, italics added.) The Legislature later deleted the conditional stay language italicized above. (See Assem. Bill No. 1675 (1999-2000 Reg. Sess.) as amended July 6, 1999, p. 2.) In analyzing the proposed deletion, the Senate Committee on the Judiciary reported that “the perfecting of an appeal [from an order granting or denying a special motion to strike] stays proceedings in the trial court.” (Sen. Com. on Judiciary, analysis of Assem. Bill No. 1675 (1999-2000 Reg. Sess.) as amended May 28, 1999, p. 3.) Following the deletion, the Senate Rules Committee echoed this understanding in a subsequent analysis of Assembly [195]Bill No. 1675. (See Sen. Rules Com., Off. of Sen. Floor Analyses, 3d reading analysis of Assem. Bill No. 1675 (1999-2000 Reg. Sess.) as amended July 12, 1999, p. 3 [“This bill would provide that an order granting or denying a special motion to strike shall be immediately appealable, and therefore, the perfecting of the appeal would stay proceedings in the trial court”].) Thus, the Legislature, in enacting section 425.16, subdivision (j), clearly intended that the perfecting of an appeal from the denial of an anti-SLAPP motion stay further trial court proceedings on the merits.
The Legislature reiterated this intent in 2003 when it enacted section 425.17—which exempted certain types of actions from the special motion to strike procedure established in section 425.16. (See Eu v. Chacon (1976) 16 Cal.3d 465, 470 [128 Cal.Rptr. 1, 546 P.2d 289] [“Although a legislative expression of the intent of an earlier act is not binding upon the courts in their construction of the prior act, that expression may properly be considered together with other factors in arriving at the true legislative intent existing when the prior act was passed”].) In creating this exemption, the Legislature expressly made the denial of an anti-SLAPP motion based on the section 425.17 exemption not appealable. (§ 425.17, subd. (e).) The Legislature did so because “[e]xisting law provides that an order denying a special motion to strike is appealable to the court of appeal” and “that the perfecting of an appeal stays proceedings in the trial court upon the judgment or order appealed from or upon the matters embraced therein or affected thereby.” (Sen. Rules Com., Off. of Sen. Floor Analyses, analysis of Sen. Bill No. 515 (2003-2004 Reg. Sess.) as amended July 8, 2003, p. 4.) Thus, the Legislature found it necessary to render the “stay and appeals provisions inapplicable when a trial court denies a special motion to strike on the grounds that a cause of action is exempt” under section 425.17. (Sen. Rules Com., Off. of Sen. Floor Analyses, analysis of Sen. Bill No. 515 (2003-2004 Reg. Sess.) as amended July 8, 2003, p. 4, italics added.) In doing so, the Legislature confirmed its intent that an appeal from the denial of an anti-SLAPP motion on non-section-425.17 grounds automatically stays further trial court proceedings on the merits. Because we must follow the Legislature’s intent, we agree with Mattel, supra, 99 Cal.App.4th 1179, and hold that an appeal from the denial of an anti-SLAPP motion automatically stays further trial court proceedings on the merits.8
In light of our holding today, some anti-SLAPP appeals will undoubtedly delay litigation even though the appeal is frivolous or insubstantial. As the Court of Appeal observed and plaintiffs contend, such a result may encourage defendants to “misuse the [anti-SLAPP] motions to delay meritorious litigation or for other purely strategic purposes.” And “the benefit of preventing” [196]the rare situation where a trial court erroneously denies an anti-SLAPP motion and refuses to automatically stay “all trials pending an appeal ... is [arguably] outweighed by the danger of encouraging meritless anti-SLAPP motions and appeals as a trial strategy to simply delay the trial of meritorious cases.”
Such an assessment is, however, a question for the Legislature, and the Legislature has already answered it. Thus, we can only minimize this danger by encouraging our courts to resolve these motions and appeals as expeditiously as possible. To this end, reviewing courts should dismiss frivolous appeals as soon as practicable and do everything in their power to “ ‘prevent . . . frustration of the relief granted.’ (Cal. Rules of Court, rule 24(b)(3)..)” (Brar, supra, 115 Cal.App.4th at p. 1320.) And trial courts should not hesitate to award attorney’s fees and costs to prevailing plaintiffs if the “special motion to strike is frivolous or is solely intended to cause unnecessary delay.” (§425.16, subd. (c).) Hopefully, these measures will somewhat reduce the risk of abuse.
III.
We now turn to the judgment in this case. Despite defendants’ appeal from the denial of their anti-SLAPP motions, the trial court held a trial and entered a judgment for plaintiffs. The trial, however, should have been automatically stayed under section 916, subdivision (a). (See ante, at pp. 191-196.) Consequently, we find that the trial court lacked subject matter jurisdiction over the matters on trial and that the resulting judgment is therefore void.
“The principle of ‘subject matter jurisdiction’ relates to the inherent authority of the court involved to deal with the case or matter before it.” (Conservatorship of O’Connor (1996) 48 Cal.App.4th 1076, 1087 [56 Cal.Rptr.2d 386].) Thus, in the absence of subject matter jurisdiction, a trial court has no power “to hear or determine [the] case.” (Abelleira v. District Court of Appeal (1941) 17 Cal.2d 280, 288 [109 P.2d 942] (Abelleira).) And any judgment or order rendered by a court lacking subject matter jurisdiction is “void on its face . . . .” (Rochin v. Pat Johnson Manufacturing (1998) 67 Cal.App.4th 1228, 1239 [79 Cal.Rptr.2d 719] (Rochin).)
Under section 916, “the trial court is divested of’ subject matter jurisdiction over any matter embraced in or affected by the appeal during the [197]pendency of that appeal. (Betz, supra, 16 Cal.App.4th at p. 938.) “The effect of the appeal is to remove the subject matter of the order from the jurisdiction of the lower court . . . .” (Stateler, supra, 107 Cal. at p. 539.)9 Thus, “that court is without power to proceed further as to any matter embraced therein until the appeal is determined.” (Stateler, at p. 539; see also 2 Witkin, Cal. Procedure (4th ed. 1997) Jurisdiction, § 319, p. 893 [“when the cause is taken over by a reviewing court on appeal or other proceeding in review, the trial court is divested of jurisdiction of the subject matter during the period of review, and has no power to vacate or modify the judgment or otherwise to deal with the cause”].) And any “proceedings taken after the notice of appeal was filed are a nullity.” (Davis v. Thayer, supra, 113 Cal.App.3d at p. 912; see also Kinard v. Jordan (1917) 175 Cal. 13, 16 [164 P. 894] [finding that the lower court order “must be deemed a nullity”].) This is true even if the subsequent proceedings cure any purported defect in the judgment or order appealed from. (See Sacks v. Superior Court, supra, 31 Cal.2d at p. 541 [“ ‘after the appeal was perfected, the lower court lost jurisdiction of the cause and could take no step to defeat appellants of the right to prosecute [198]their appeal with effect. ... A recognition of any other rule would lead to uncertainty and confusion in litigation, and in effect would enable the lower court to review its own proceedings’ ”]; People v. Sonoqui (1934) 1 Cal.2d 364, 367 [35 P.2d 123] [reversing a judgment of conviction because the trial occurred before the remittitur issued].)
Indeed, section 916, as a matter of logic and policy, divests the trial court of jurisdiction over the subject matter on appeal—i.e., jurisdiction in its fundamental sense. (See Abelleira, supra, 17 Cal.2d at p. 288.) The purpose of the automatic stay under section 916 is to preserve “the status quo until the appeal is decided” (Elsea, supra, 4 Cal.App.4th at p. 629), by maintaining “the rights of the parties in the same condition they were before the order was made” (Wolcott v. Hudner (1924) 67 Cal.App. 704, 707 [228 P. 46]). Otherwise, the trial court could render the “appeal futile by altering the appealed judgment or order by conducting other proceedings that may affect it.” (Elsea, at p. 629.)
In order to preserve the status quo and return the parties to “the same condition they were before the order was made” (Wolcott v. Hudner, supra, 67 Cal.App. at p. 707), section 916 necessarily renders any subsequent trial court proceedings on matters “embraced” in or “affected” by the appeal void—and not merely voidable (§916). A contrary conclusion would allow the trial court to render an appeal futile. If trial court proceedings during the pendency of the appeal are consistent with the reviewing court’s resolution of the appeal, then the appeal is, in effect, futile because the trial court has already granted the relief that would have been granted on appeal. And if trial court proceedings during the pendency of the appeal conflict with the reviewing court’s resolution of the appeal, then the appeal will likely be futile because the prevailing party, in most instances, will have no adequate remedy left. Because “the remedy by appeal cannot be denied to an aggrieved party dissatisfied with the judgment or the order appealed from by an act of the trial court in the action, at the behest or on the motion of the respondent, after an appeal has been taken and is pending” (Durbrow v. Chesley (1913) 23 Cal.App. 627, 629 [138 P. 917], italics added), the automatic stay under section 916 must divest the trial court of fundamental jurisdiction over the matters embraced in or affected by the appeal (see Mulvey v. Superior Court (1913) 22 Cal.App. 514, 516 [135 P. 53] [“ ‘Common fairness and a sense of justice readily suggests that while plaintiffs were in good faith prosecuting their appeals, they should be in some manner [199]protected in having the subject matter of the litigation preserved intact until the appellate court could settle the controversy’ ”]). Indeed, the only way to ensure that the appealing party has a remedy on appeal is to deprive the trial court of jurisdiction in its fundamental sense.10
[200]In this case, defendants’ anti-SLAPP motions encompassed all of plaintiffs’ causes of action. As such, all of the matters on trial were embraced in and affected by defendants’ appeal from the denial of that motion (see ante, at pp. 191-196), and the trial court lacked subject matter jurisdiction over these matters (see Betz, supra, 16 Cal.App.4th at p. 938). Because the court lacked subject matter jurisdiction over the matters on trial, the judgment in this case is “void on its face . . . .” (Rochin, supra, 67 Cal.App.4th at p. 1239.) “When, as here, there is an appeal from a void judgment, the reviewing court’s jurisdiction is limited to reversing the trial court’s void acts.” (Griset v. Fair Political Practices Com. (2001) 25 Cal.4th 688, 701 [107 Cal.Rptr.2d 149, 23 P.3d 43] (Griset).) We therefore reverse the judgment in its entirety.
Plaintiffs do not dispute that the trial court lacked subject matter jurisdiction over the matters on trial if the trial should have been automatically stayed under section 916, subdivision (a). Plaintiffs also do not dispute that the judgment is void if the trial court lacked subject matter jurisdiction over the matters on trial. Instead, plaintiffs contend the court may affirm on other grounds. We do not, however, find these alternative grounds persuasive.
First, plaintiffs contend an untimely anti-SLAPP motion is not appealable despite section 425.16, subdivision (j), and therefore does not invoke the automatic stay provision of section 916, subdivision (a). (See Central Savings Bank of Oakland v. Lake (1927) 201 Cal. 438, 442 [257 P. 521].) But we have long held that even a void judgment or order is appealable if that judgment or order is otherwise appealable. (Ewing v. Richvale Land Co. (1917) 176 Cal. 152, 154 [167 P. 876]; see also Griset, supra, 25 Cal.4th at p. 701 [implicitly recognizing that a void judgment is appealable].) We see no reason to deviate from this principle where, as here, the order is unquestionably appealable with no apparent exceptions. (See § 425.16, subd. (j).)
Second, plaintiffs contend the Court of Appeal’s summary denial of defendants’ earlier petition for writ of supersedeas seeking a stay pending appeal is law of the case and requires affirmance. Recognizing that we previously held that “a summary denial of a writ petition” should “not be given law of the case effect” (Kowis v. Howard (1992) 3 Cal.4th 888, 897 [12 Cal.Rptr.2d 728, 838 P.2d 250]), plaintiffs propose an exception to this rule in cases where, as here, the defendant argued that the court had no discretion to deny relief. We have, however, rejected such an exception in the past because it would hamper judicial economy (id. at p. 898), and see no reason to reconsider it here. Leone v. Medical Board (2000) 22 Cal.4th 660 [94 Cal.Rptr.2d 61, 995 P.2d 191] does not compel a different conclusion. In Leone, we held that “an appellate court must judge [a writ] petition on its [201]procedural and substantive merits” if the “petition was the only authorized mode of appellate review.” (Id. at p. 670.) An appellate court need not do so, however, if the ruling “could also be reviewed on appeal from the judgment ultimately entered in the action.” (Ibid..) As evidenced by this appeal, the trial court’s and Court of Appeal’s refusals to stay proceedings pending appeal could be reviewed on an appeal from the judgment. Leone is therefore inapposite. Accordingly, we find the judgment void and reverse the judgment of the Court of Appeal.11
Disposition
We reverse the judgment of the Court of Appeal with instructions to remand the case for a new trial in accordance with our opinion.12
Kennard, J., Baxter, J., Werdegar, J., Chin, J., and Moreno, J., concurred.
All further undesignated statutory references are to the Code of Civil Procedure unless otherwise indicated.
In 1999, Vanan Associates reorganized into three independent public companies: Varían Medical, Varían Semiconductor, and Varían, Inc.
The original complaint alleged the following causes of action: (1) unfair competition (Bus. & Prof. Code, § 17200 et seq.); (2) false advertising (Bus. & Prof. Code, § 17500 et seq.); (3) libel; (4) slander per se; (5) violation of the Lanham Act (15 U.S.C. § 1051 et seq.); (6) violation of Penal Code section 637.1; (7) invasion of privacy—false light; (8) invasion of privacy—appropriation of name; and (9) conspiracy.
These causes of action included: (1) unfair competition (Bus. & Prof. Code, § 17200 et seq.); (2) false advertising (Bus. & Prof. Code, § 17500 et seq.); (3) libel; (4) invasion of privacy—false light; (5) invasion of privacy—-appropriation of name; (6) conspiracy; and (7) breach of contract.
Section 916, subdivision (a) states in full: “Except as provided in Sections 917.1 to 917.9, inclusive, and in Section 116.810, the perfecting of an appeal stays proceedings in the trial court upon the judgment or order appealed from or upon the matters embraced therein or affected thereby, including enforcement of the judgment or order, but the trial court may proceed upon any other matter embraced in the action and not affected by the judgment or order.”
(See, e.g., Lerner v. Superior Court (1952) 38 Cal.2d 676, 684 [242 P.2d 321] [holding that an appeal from a custody order precludes the trial court from, as a practical matter, enforcing the appealed order by permitting the father to send the child to school in New Jersey]; Sacks v. Superior Court (1948) 31 Cal.2d 537, 540 [190 P.2d 602] [holding that an appeal precludes the trial court from retrying the issues on appeal]; Williams v. Wells Fargo Bank & Union Trust Co. (1941) 17 Cal.2d 104, 107 [109 P.2d 649] [holding that an appeal precludes the trial court from executing the appealed order]; Stateler v. Superior Court (1895) 107 Cal. 536, 539 [40 P. 949] (Stateler) [same]; Betz, supra, 16 Cal.App.4th at pp. 938-940 [holding that an appeal [190]precludes the trial court from vacating the appealed judgment or order]; Elsea, supra, 4 Cal.App.4th at p. 629 [same]; Socialist Workers etc. Committee v. Brown (1975) 53 Cal.App.3d 879, 890-891 [125 Cal.Rptr. 915] [holding that an appeal precludes the trial court from issuing a subsequent order that effectively enforces the appealed order]; Environmental Coalition of Orange County, Inc. v. AVCO Community Developers, Inc. (1974) 40 Cal.App.3d 513, 525 [115 Cal.Rptr. 59] [holding that an appeal from a preliminary injunction precludes the trial court from modifying or dissolving the injunction]; Dallman v. Dallman (1958) 164 Cal.App.2d 815, 817-818 [331 P.2d 245] [holding that an appeal precludes the trial court from modifying the appealed order]; Agnew v. Superior Court (1953) 118 Cal.App.2d 230, 234 [156 Cal.Rptr. 285, 257 P.2d 661] (Agnew) [holding that an appeal precludes the trial court from enforcing the appealed order].)
(See, e.g., Townsel v. Superior Court (1999) 20 Cal.4th 1084, 1091 [86 Cal.Rptr.2d 602, 979 P.2d 963] [Code Civ. Proc., § 206]; Waters, supra, 181 Cal. at p. 587 [Code Civ. Proc., former § 963]; People v. Schulz (1992) 5 Cal.App.4th 563, 571 [7 Cal.Rptr.2d 269] [Pen. Code, § 1160]; United Professional, supra, 9 Cal.App.3d at pp. 384-385 [Code Civ. Proc., former § 409.1].)
Such an appeal does not, however, stay proceedings relating to causes of action not affected by the motion.
(See also, e.g., People v. Cunningham (2001) 25 Cal.4th 926, 1044 [108 Cal.Rptr.2d 291, 25 P.3d 519] [“ ‘an appeal from an order in a criminal case removes the subject matter of that order from the jurisdiction of the trial court’ ”]; Gantner v. Gantner (1952) 38 Cal.2d 691, 692 [242 P.2d 329] [“The effect of an appeal is to remove the subject matter of the appeal from the jurisdiction of the trial court”]; Lerner v. Superior Court, supra, 38 Cal.2d at p. 680 [“The loss of jurisdiction is so complete that even the consent of the parties is ineffective to reinvest the trial court with jurisdiction over the subject matter of the appeal”]; People v. Mayne (1897) 118 Cal. 516, 522 [50 P. 654] [“By the appeal from the order denying a new trial the subject matter of that order was removed from the superior court, and while the appeal was pending that court had no jurisdiction to change the order”]; Ruggles v. Superior Court (1894) 103 Cal. 125, 128 [37 P. 211] [“By the appeal the order or decree is set at large, and the subject matter removed from the jurisdiction of the lower court, until the appeal has been determined, and the matter remitted back from the appellate court”]; Ehret v. Congoleum Corp. (1999) 73 Cal.App.4th 1308, 1317 [87 Cal.Rptr.2d 363] [“When an appeal was filed, the effect was to ‘ “removef] from the jurisdiction of the superior court the subject matter of the judgment” ’ ”]; Davis v. Thayer (1980) 113 Cal.App.3d 892, 912 [170 Cal.Rptr. 328] [“ ‘An appeal removes from the jurisdiction of the trial court the subject matter of the judgment or order appealed from, including all issues going to the validity or correctness of such judgment or order’ ”]; Beresh v. Sovereign Life Ins. Co. (1979) 92 Cal.App.3d 547, 552 [155 Cal.Rptr. 74] [“It is clear that ‘[i]n effect the appeal removed from the jurisdiction of the superior court the subject matter of the judgment’ ”]; People v. Mason (1960) 184 Cal.App.2d 182, 192 [7 Cal.Rptr. 525] [“ The effect of an appeal is to remove from the jurisdiction of the trial court the subject matter of the judgment or order appealed from’ ”]; People v. Blume (1960) 183 Cal.App.2d 474, 477 [7 Cal.Rptr. 16] [“An appeal removes the subject matter thereof from the jurisdiction of the trial court”]; Agnew, supra, 118 Cal.App.2d at p. 234 [“The effect of an appeal is to remove from the jurisdiction of the trial court the subject matter of the judgment or order appealed from”]; Lukasik, supra, 108 Cal.App.2d at p. 444 [same]; Danley v. Superior Court (1923) 64 Cal.App. 594, 598 [222 P. 362] [“ ‘When the appeal was perfected the effect thereof was to remove the subject matter of the order from the jurisdiction of the lower court’ ”]; Colusa etc. R.R. Co. v. Superior Court (1916) 31 Cal.App. 746, 761 [161 P. 1011] [“The effect of the appeal being to remove the subject matter of the order from the jurisdiction of the lower court”].)
Citing article VI, section 13 of the California Constitution and People v. Pompa-Ortiz (1980) 27 Cal.3d 519 [165 Cal.Rptr. 851, 612 P.2d 941], the concurring and dissenting opinion contends we should disregard the purpose behind Code of Civil Procedure section 916 and over a century of unequivocal case law and apply a harmless error analysis. Neither citation, however, supports this contention.
First, article VI, section 13 has no bearing on the question of whether Code of Civil Procedure section 916 divests the trial court of fundamental jurisdiction over matters on appeal. Indeed, jurisdiction “ ‘over the subject-matter is given by law’ ” and “ ‘nothing but an additional grant from the legislative authority can extend that power over a class of cases formerly excepted.’ ’’ (Grannis v. Superior Court (1905) 146 Cal. 245, 255 [79 P. 891].) Here, Code of Civil Procedure section 916, as a matter of logic, policy, and overwhelming precedent, divests the trial court of jurisdiction over the subject matter on appeal, and article VI, section 13 does not and cannot reconfer such jurisdiction. (See Johnson v. Superior Court (1926) 77 Cal.App. 599, 604 [247 P. 249] [holding that lack of subject matter jurisdiction cannot be cured under the miscarriage of justice provision of the California Constitution].)
Second, People v. Pompa-Ortiz, supra, 27 Cal.3d 519—which did not address the scope of the automatic stay—is inapposite. Unlike the error at issue in Pompa-Ortiz—an inregularity in the preliminary hearing procedure—which may be forfeited (see Pen. Code, § 996), the parties cannot invest a trial court with jurisdiction during the pendency of an appeal. (See, e.g., In re Johannes (1931) 213 Cal. 125, 131 [1 P.2d 984] [“But when we are dealing with the question of the jurisdiction of the subject matter of an offense, agreement of the parties or estoppel cannot confer it”].) Moreover, the situation in Pompa-Ortiz is hardly analogous. In Pompa-Ortiz, the defendant could have avoided the error by seeking writ review. If the defendant had done so, the matter could have been “expeditiously returned to the magistrate for proceedings free of the charged defects.” (Pompa-Ortiz, at p. 529.) And even if the defendant had prevailed by writ, he could still have been tried and convicted. (See Pen. Code, § 999 [“An order to set aside an indictment or information ... is no bar to a future prosecution for the same offense’’].) By contrast, in this case, defendants, by promptly appealing, did everything they could to avoid the subsequent trial. And defendants, unlike the defendant in Pompa-Ortiz, would have avoided the trial that subsequently occurred if they had prevailed on appeal.
In any event, the precedent overruled in Pompa-Ortiz is far different than the precedents at issue here. In Pompa-Ortiz, we overruled a 20-year-old decision that had erroneously construed the word “jurisdiction” to mean jurisdiction in its fundamental sense. (See People v. Elliot (1960) 54 Cal.2d 498 [6 Cal.Rptr. 753, 354 P.2d 225].) By contrast, the concurring and dissenting opinion proposes to overrule several decisions, including a 70-year-old decision from this court. And, unlike the lone precedent at issue in Pompa-Ortiz, the many California decisions construing the scope of the automatic stay have consistently and unequivocally referred to the trial court’s lack of subject matter jurisdiction—and not just its lack of jurisdiction. Where, as here, numerous “precedent[s] applying authoritative, settled statutory construction that ha[ve] been central to the analysis and holdings of these decisions” exist and the Legislature has done nothing, “[t]he principles underlying the doctrine of stare decisis apply with special force” and it would be inappropriate “to overrule or disapprove” these precedents. (Barner v. Leeds (2000) 24 Cal.4th 676, 685, fn. 2 [102 Cal.Rptr.2d 97, 13 P.3d 704].)
The Court of Appeal dismissed defendants’ appeal from the denial of their anti-SLAPP motions following the trial. In this appeal, defendants do not challenge this dismissal or the trial court’s order denying the motions.
Following our grant of review, defendants filed a petition for writ of supersedeas, seeking to stay enforcement of the judgment. Because we reverse the judgment of the Court of Appeal, we now dismiss the petition as moot.