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Rule 10b-5 Securities Class Action Exposure Second Highest in 8 Years

prnewswire.com
ORCL Oracle is mentioned as a defendant in a mega case with $142.4 billion in alleged shareholder losses due to Rule 10b-5 violations, indicating significant negative exposure. MSFT Microsoft is named in a mega case with $357.4 billion in alleged shareholder losses stemming from Rule 10b-5 violations, representing substantial negative sentiment.

Rule 10b-5 Securities Class Action Exposure Second Highest in 8 Years BETHESDA, Md., July 10, 2026 /PRNewswire/ -- Today, Securities Analytics Research (SAR) published the Securities Class Action Rule 10b-5 Exposure Report for 2Q 2026. Private Rule 10b-5 securities claims filed during 2Q'26 reached the second highest exposure over an eight-year period, just slightly lower than in 2Q'25.

According to the report, market capitalization losses alleged to be fraud-related against directors and officers of defendant U.S.-listed public companies sued during 2Q'26 amounted to $449.6 billion. This marks a quarterly increase of 65.1% in Rule 10b-5 securities litigation exposure.

During the first half of 2026, investor plaintiffs have claimed approximately $721.9 billion in market capitalization losses stemming from alleged violations of Rule 10b-5. SAR's claim-specific event study data indicate that market capitalization losses claimed against defendant public companies in the U.S. increased by 135%, or $414.3 billion, during the first half of 2026, compared to the second half of 2025. The semi-annual increase was driven primarily by a greater magnitude in alleged stock drops against defendants with higher market capitalizations, as evidenced by two mega cases against Oracle and Microsoft, which account for $142.4 billion and $357.4 billion in alleged shareholder losses, respectively.

"During the first half of 2026, the number of filings, alleged stock drops, and exposure have all increased substantially. Rule 10b-5 exposure is particularly high, having increased by more than $400 billion relative to the last half of 2025," said Stephen Sigrist, head of data science at SAR.

According to SAR, investor plaintiffs have claimed an average of $5.0 and $11.5 billion in market capitalization losses per Rule 10b-5 class action against U.S.-listed companies in 1Q and 2Q 2026, respectively. During the salient periods, shareholders alleged an average of $2.9 and $6.4 billion in market capitalization losses per stock drop in 1Q and 2Q 2026, respectively.

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Contact information: [email protected]

SOURCE SAR