Johnson Fistel Investigates OneStream, Inc. (OS) Shareholders’ Rights Following Board Approval of $24.00 Take-Private Transaction

Shareholder rights law firm Johnson Fistel, PLLP has launched an investigation into whether the board members and senior executives of OneStream, Inc. breached their fiduciary duties in connection with the Company’s proposed take-private transaction led by Hg Capital, with minority participation from General Atlantic and Tidemark.

On January 6, 2026, OneStream announced that it had entered into a definitive agreement to be acquired for approximately $6.4 billion in cash, with shareholders to receive $24.00 per share. Under the proposed transaction, majority stockholder Kohlberg Kravis Roberts & Co. LP (“KKR”) will liquidate its stake in the Company. Johnson Fistel is investigating whether OneStream insiders or controlling shareholders are positioned to receive disparate benefits not shared equally with public stockholders and whether the transaction undervalues the Company.

If you own OneStream shares and believe this proposed transaction may undervalue your investment, you are encouraged to consider joining our investigation.

Shareholders seeking more information may also contact lead analyst James Baker at jimb@johnsonfistel.com or by telephone at (619) 814-4471. If emailing, please include a phone number.

About Johnson Fistel, PLLP | Top Law Firm – Securities Fraud & Investor Rights
Johnson Fistel, PLLP is a nationally recognized shareholder-rights law firm with offices in California, New York, Georgia, Idaho, and Colorado. The firm represents individual and institutional investors in shareholder derivative and securities class action lawsuits and also assists foreign investors who purchased shares on U.S. exchanges. To learn more, visit www.johnsonfistel.com.

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In 2024, Johnson Fistel was ranked among the Top 10 Plaintiff Law Firms by ISS Securities Class Action Services. This recognition reflects the firm’s effectiveness in advocating for investors, having recovered approximately $90,725,000 for aggrieved clients in cases where it served as lead or co-lead counsel. This marks the eighth time the firm has been recognized as a top plaintiffs’ securities law firm in the United States, based on the total dollar value of final recoveries.

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Contact
Johnson Fistel, PLLP
501 W. Broadway, Suite 800
San Diego, CA 92101
James Baker, Investor Relations – or – Frank J. Johnson, Esq.
(619) 814-4471 | jimb@johnsonfistel.com | fjohnson@johnsonfistel.com