Key takeaways

The Federal Circuit reversed a jury verdict against EOFlow over insulin pump technology, finding the claims time-barred.

The divided, precedential decision applied the "knew or should have known" standard to trade secret statutes of limitations.

A district court had previously reduced an initial $452 million jury award to approximately $59 million before the appellate reversal.

Companies must actively investigate suspected trade secret theft rather than waiting for definitive proof before filing suit.

The Decision

The U.S. Court of Appeals for the Federal Circuit has wiped out a massive trade secret judgment, ruling that a plaintiff's failure to act promptly doomed its claims. As first reported in legal media on or about May 28, 2026, the appellate court reversed a jury verdict in a dispute between Insulet Corporation and EOFlow over insulin pump technology.

The Federal Circuit held that the lawsuit filed by Insulet was time-barred. The court applied the "knew or should have known" standard regarding the statute of limitations for trade secret claims, concluding that the plaintiff possessed enough information to trigger the filing deadline long before it actually brought the case.

The reversal nullifies a massive financial penalty. The original jury verdict against EOFlow was $452 million. The district court had previously reduced the jury award to approximately $59 million. Now, the appellate court has erased the award entirely in a divided, precedential decision. For further details on the holding, see Insulet v. Eoflow.

Why It Matters

The ruling establishes a strict boundary for intellectual property plaintiffs relying on the discovery rule to toll the statute of limitations. By focusing heavily on the "knew or should have known" standard, the Federal Circuit signals that companies cannot wait for absolute certainty or a smoking gun before filing a trade secret misappropriation lawsuit.

If a company suspects that a competitor has acquired its proprietary technology, the clock begins ticking the moment a reasonable investigation would have uncovered the theft. This interpretation shifts the burden heavily onto intellectual property owners to actively police their rights and file claims at the earliest signs of misappropriation. Waiting to build a perfect case risks forfeiting the right to sue altogether.

Who Should Care

For lawyers

Intellectual property litigators must recalibrate their pre-suit investigation timelines. The precedential nature of this Federal Circuit decision means it binds future panels and provides a strong defensive weapon for accused misappropriators. Defense counsel will likely use this ruling to file early dispositive motions based on the statute of limitations, forcing plaintiffs into extensive discovery regarding exactly when they first suspected intellectual property theft. Plaintiff attorneys must carefully document the timeline of their clients' knowledge and ensure that lawsuits are filed within the statutory window, even if the full extent of the misappropriation remains unclear.

For consumers/parties

Medical device manufacturers and technology companies must treat suspicions of corporate espionage or employee defection with immediate urgency. A company that loses personnel to a competitor and subsequently sees a similar product hit the market cannot sit on its hands. Executives must authorize legal and forensic investigations immediately. For accused companies, the ruling offers a shield against dormant claims that a rival revives only after a new product achieves commercial success.

Legal Background

Trade secret litigation relies heavily on statutes of limitations to ensure claims are brought while evidence is fresh and to provide certainty to businesses operating in competitive markets. Because trade secret theft is inherently secretive, the law provides a "discovery rule." Under this framework, the statutory clock does not necessarily start the moment the theft occurs. Instead, it begins when the plaintiff discovers the misappropriation.

However, the discovery rule is not absolute. Courts have long debated the exact trigger for the statute of limitations. The standard extends beyond actual knowledge to encompass constructive knowledge—what a plaintiff "knew or should have known." If a plaintiff ignores obvious red flags or fails to conduct a reasonable investigation when faced with suspicious circumstances, courts will treat the plaintiff as if they had actual knowledge of the theft. The tension in these cases always centers on how much suspicion is required to trigger the "should have known" standard.

What the Court Did

In a divided, precedential decision, the Federal Circuit concluded that Insulet's claims fell on the wrong side of the statute of limitations. The appellate court examined the timeline of events and determined that the plaintiff possessed sufficient information to realize its insulin pump technology trade secrets were potentially compromised well before it initiated litigation.

By applying the "knew or should have known" standard, the court held that the lawsuit was time-barred. The majority reasoned that the plaintiff had a duty to investigate its suspicions earlier. Because the plaintiff failed to file suit within the statutory window following the point at which it should have discovered the misappropriation, the court reversed the judgment entirely. The decision wiped out the district court's $59 million award, which itself was a sharp reduction from the original $452 million jury verdict.

How It May Be Applied

This precedential ruling will likely lead to an increase in statute of limitations defenses in trade secret litigation nationwide. Defendants will aggressively seek discovery into a plaintiff's internal communications, looking for early expressions of suspicion regarding departing employees or competitor product announcements.

Open questions remain regarding exactly what constitutes enough suspicion to trigger the "should have known" standard. Future courts will have to determine whether mere industry rumors or the simple hiring of a former employee by a competitor is enough to start the clock. Until those boundaries are tested, intellectual property owners face immense pressure to file lawsuits quickly, potentially leading to an increase in early-stage, speculative trade secret complaints.

The Statute of Limitations Trigger

Standard	Trigger Event	Consequence
Actual Knowledge	Plaintiff finds direct proof of theft.	The statutory clock begins immediately.
Constructive Knowledge	Plaintiff encounters suspicious circumstances that would prompt a reasonable person to investigate.	The statutory clock begins when the plaintiff "should have known" about the theft.
Strict Application	Plaintiff waits for definitive proof despite early warning signs.	The lawsuit is deemed time-barred, and the verdict is reversed.

Plain-English Translation

In civil lawsuits, a statute of limitations is a strict deadline for filing a claim. If you miss the deadline, the court will throw out your case, no matter how strong your evidence is. In cases involving stolen confidential business information—known as trade secrets—it can be hard to know exactly when the theft happened. Because of this, the law says the deadline clock starts ticking when the victim discovers the theft. However, the Federal Circuit's ruling means you cannot close your eyes to obvious clues. If you "should have known" your secrets were stolen based on the available information, the clock starts ticking immediately. If you wait too long to investigate and sue, you lose your right to recover any money, even if a jury originally awarded you millions of dollars.

This article is general legal information and commentary about legal developments. It is not legal advice, does not address your specific situation, and is not a substitute for advice from a licensed attorney. Reading this article and contacting us through this website do not create an attorney-client relationship.

Sources & authorities

Insulet v. Eoflow — source

Federal Circuit Reverses $59M Insulet Trade Secret Verdict

Key takeaways