FTC v. Meta: Structural Regulatory

The FTC’s five-year campaign to unwind Meta’s Instagram and WhatsApp acquisitions ended in a full defense judgment in November 2025, Judge Boasberg found no current monopoly in a market that includes TikTok and YouTube, and the agency is now trying to revive the case in the D.C. Circuit.

LATEST DEVELOPMENT · AUG 27, 2026

Meta filed its appellee brief on August 20, 2026, urging the D.C. Circuit to affirm the district court’s finding that Meta currently lacks monopoly power given competition from TikTok and YouTube. On August 27, 2026, the U.S. Chamber of Commerce and other amici filed a brief supporting Meta’s position. The FTC’s reply brief remains due September 29, 2026.

BACKGROUND

Filed in December 2020, the FTC’s suit sought the most dramatic remedy in modern antitrust: divestiture of Instagram (acquired 2012) and WhatsApp (2014), on the theory that Meta pursued a ‘buy-or-bury’ strategy to protect a monopoly in personal social networking services. The complaint was dismissed as insufficient in June 2021, repleaded that August and sustained in January 2022. A parallel state-AG case was dismissed as untimely. After summary judgment was largely denied in November 2024, the case went to a seven-week trial beginning April 14, 2025, with Mark Zuckerberg as the opening witness.

On November 18, 2025, Chief Judge James Boasberg entered judgment for Meta. He held that TikTok and YouTube, whose features have converged with Instagram’s and Facebook’s, belong in the relevant market, leaving Meta with a share below 50% and declining, and that Section 13(b)’s forward-looking design requires the FTC to prove current or imminent monopoly power, whatever the historical record showed. The FTC noticed its appeal on January 20, 2026 and filed its opening D.C. Circuit brief on May 22, 2026, arguing monopoly power should be measured when the case was filed and that TikTok’s later growth is irrelevant. Meta filed its appellee brief on August 20, 2026, the FTC’s reply is due September 29, and argument is expected late 2026 or in 2027.

TIMELINE

AUG 27, 2026FILING

Chamber of Commerce amicus brief backs Meta on appeal

The U.S. Chamber of Commerce and other amici filed a brief opposing revival of the FTC’s monopolization case, arguing the FTC’s appellate arguments seek to rewrite established antitrust law.

Chamber Says FTC's Meta Appeal Trying To 'Rewrite' Law
AUG 20, 2026FILING

Meta files appellee brief in D.C. Circuit

Meta filed its response brief arguing the district court correctly found that, whatever Meta’s past conduct, it currently faces robust competition from TikTok and YouTube and lacks monopoly power today.

Meta Tells DC Circ. To Reject FTC Appeal Meta Fights FTC Bid To Revive Monopoly Charges
MAY 22, 2026APPEAL

FTC files opening appellate brief

The agency argues monopoly power is measured at filing. AAI’s supporting amicus follows May 29. Meta’s response is due August 20, 2026.

AAI amicus in FTC v. Meta Platforms (D.C. Cir. No. 26-5028)
JAN 20, 2026APPEAL

FTC notices appeal to the D.C. Circuit

FTC v. Meta — Wikipedia
NOV 18, 2025JUDGMENT

Judgment for Meta: no current monopoly power

Judge Boasberg places TikTok and YouTube in the relevant market and holds Section 13(b) requires proof of current or imminent violation.

FTC Loses Retroactive Merger Challenge (Skadden)
APR 14, 2025HEARING

Trial begins. Zuckerberg testifies

FTC v. Meta — Wikipedia
NOV 13, 2024PROCEDURAL

Summary judgment largely denied. Case set for trial

FTC v. Meta Platforms tracker (Tech Policy Press)
AUG 19, 2021PROCEDURAL

Amended ‘buy-or-bury’ complaint filed

Sustained in January 2022, setting up years of discovery.

FTC v. Meta — Wikipedia
JUN 28, 2021PROCEDURAL

Complaint dismissed as insufficient

The court finds the FTC failed to plausibly allege monopoly power but grants leave to replead.

FTC v. Meta — Wikipedia
DEC 9, 2020FILING

FTC sues to unwind Instagram and WhatsApp acquisitions

FTC v. Meta — Wikipedia

EXPERIMENTAL AI FORECAST

HOW IT IS MADE →

Predicted outcome: Respondent win
Model-assigned probability: about 75%
Timeframe: late 2027 to mid-2028
Model confidence: medium

The most likely end is affirmance of Meta’s complete trial win, roughly 75 percent, with a D.C. Circuit opinion landing between late 2027 and mid-2028 after argument in the first half of 2027. The controlling driver is the standard of review: Boasberg’s inclusion of TikTok and YouTube in the personal social networking market and his finding that Meta’s share is below 50 percent and falling are factual determinations from a seven-week bench trial, reviewed for clear error, and appellate courts rarely disturb that kind of record. The FTC’s strongest appellate theory is legal rather than factual, that monopoly power should be measured as of the December 2020 filing date, but even a favorable ruling on that question runs into Section 13(b)’s text limiting relief to conduct a defendant “is violating or is about to violate,” and into trial findings about competitive conditions that already existed when the case was filed. There is no settlement path here worth pricing, because Meta holds a full defense judgment and would never agree to divestiture or meaningful conduct remedies to buy peace, and the Chamber of Commerce amicus signals the business community treating this as a precedent fight rather than a negotiation. The leading alternative, at roughly 20 percent, is a partial reversal on the timing-of-monopoly-power question with remand to Boasberg for reconsideration of liability, which would extend the case into 2029 and still most likely end in another defense judgment. A voluntary withdrawal or quiet abandonment of the appeal by the FTC is possible but unlikely at under 5 percent given the agency has already briefed the merits. Whichever side loses is likely to seek en banc review or certiorari, so the practical endpoint could slip another year beyond the panel decision.

Market definition findings reviewed for clear error after full trial · Section 13(b) text supports current-violation requirement · Meta has full judgment and zero settlement incentive · Appellate reversal rates after bench trials are low · Even reversal likely yields remand, not FTC victory

Generated automatically by claude-opus-5 on Sep 13, 2026 from this case’s record on this site, and published without editorial review. The probability is the model’s judgment, not a measured frequency; there is no established validation record for these forecasts. Not legal or investment advice. How the forecasts are made →