Welcome to our dedicated page for ONESTREAM SEC filings (Ticker: OS), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The OneStream, Inc. (OS) SEC filings page on Stock Titan aggregates the company’s regulatory disclosures from the U.S. Securities and Exchange Commission, giving investors structured access to its official communications. As a Nasdaq-listed software company focused on enterprise Finance management and AI-enabled solutions, OneStream uses SEC filings to report financial results, corporate governance changes and other material events.
Among the key documents available are Form 8-K current reports, which OneStream files to announce items such as quarterly financial results and board or leadership changes. For example, the company has filed 8-Ks in connection with its second and third quarter 2025 results and to report the appointment of a new director to its Board. These filings often reference accompanying earnings press releases that detail revenue composition, non-GAAP metrics like non-GAAP operating income and non-GAAP net income per share, and definitions of measures such as free cash flow.
Investors can also use the filings page to track how OneStream defines and reconciles non-GAAP metrics used in its communications. The company explains in its materials that non-GAAP measures are intended to supplement GAAP results by excluding certain non-cash, non-operational or non-recurring items, and provides reconciliations in tables attached to its earnings releases.
As OneStream has announced a definitive agreement to be acquired by an entity controlled by Hg, future SEC filings are expected to include documents related to that transaction, subject to regulatory requirements. On Stock Titan, these filings are accompanied by AI-powered summaries that highlight key points, helping readers quickly understand the nature of each report—whether it concerns results of operations, board changes, or transaction-related disclosures—while still allowing access to the full original documents and exhibits.
Ken Hohenstein, Chief Revenue Officer of OneStream, Inc. (OS), reported transactions dated 09/16/2025 involving both non-derivative shares and stock options. He acquired 40,000 shares via option exercises at an exercise price of $10.65 and concurrently sold 40,000 shares under a Rule 10b5-1 trading plan for a weighted average sale price of $18.69. Following these transactions he beneficially owned 1,037,062 shares before the sale line and 997,062 shares after the sale (direct), and held 790,279 shares indirectly through the Hohenstein Purple Elephant Trust. He also holds two option grants exercisable through 2031 and 2033 and unvested restricted stock units are included in the reported totals.
OneStream, Inc. Chief Financial Officer William A. Koefoed reported a sale of 8,943 shares of Class A common stock on 09/15/2025 at a price of $19.03 per share. After the transaction he beneficially owned 221,983 shares; the reported total includes unvested restricted stock units. The filing notes the sales were effected under a Rule 10b5-1 trading plan adopted by the reporting person on February 21, 2025. The Form 4 was signed on behalf of Mr. Koefoed and dated 09/16/2025.
OneStream, Inc. (OS) Form 144 shows a proposed sale of 40,000 Class A shares to be executed on 09/16/2025 through Fidelity Brokerage Services (900 Salem Street, Smithfield, RI) on the NASDAQ, with an aggregate market value listed at $740,000.00. The filing reports the shares were acquired via stock options granted on 06/30/2022 (30,000 shares) and 03/06/2023 (10,000 shares), and payment for these securities is noted as cash on the sale date. The filer has completed three prior sales of Class A shares in the past three months (three separate 20,000-share sales on 06/18/2025, 07/18/2025, and 08/18/2025) generating gross proceeds of $565,600.00, $502,400.00, and $431,200.00, respectively. The issuer name and several filer contact fields are not provided in the visible content.
OneStream, Inc. (OS) filed a Form 144 notifying the proposed sale of 8,943 Class A shares to be executed through Fidelity Brokerage Services on or about 09/15/2025 at an aggregate market value of $170,185.29. The shares were acquired on 09/10/2025 upon restricted stock vesting and are described as compensation for the holder.
The filing lists three prior Class A sales by the same person in the past three months: 9,354 shares on 06/16/2025 for $260,976.60, 25,000 shares on 06/25/2025 for $669,250.00, and 25,000 shares on 07/25/2025 for $625,000.00. Total outstanding Class A shares reported: 88,136,155.
Jonathan D. Mariner, a director of OneStream, Inc. (OS), sold 141 shares of Class A common stock on 09/03/2025 under a Rule 10b5-1 trading plan. The transactions were executed at a weighted-average price of $20.07 per share within a reported price range of $20.00 to $20.16. After the sale, the reporting person beneficially owned 33,509 shares, which the filing states include unvested restricted stock units. The Form 4 indicates the sale was effected pursuant to a 10b5-1 plan adopted on February 28, 2025 and was reported by an attorney-in-fact on behalf of the reporting person.
Form 144 notice for OneStream, Inc. (OS) reports a proposed sale of 18,564 shares of Common Stock through Goldman Sachs & Co. LLC with an aggregate market value of $370,537.44, slated for sale on 09/03/2025 on NASD. The shares were originally acquired from the issuer on 07/27/2020 when Class C shares converted to Class A; payment was recorded as None. The filing lists four recent open-market sales by Jonathan Mariner totaling 13,260 shares with gross proceeds shown for each sale (two on 07/07/2025 and two on 08/04/2025). The filer certifies no undisclosed material adverse information and includes the standard Rule 10b5-1 reference.
Ken Hohenstein, Chief Revenue Officer of OneStream, Inc. (OS), reported insider transactions dated 08/18/2025. The Form 4 shows an acquisition of a stock option for 20,000 shares with an exercise price of $10.65 and a corresponding entry classifying the option as exercisable through an award covering 20,000 underlying shares. On the same date the filing reports a sale of 20,000 Class A common shares at $21.56. Following the transactions, Hohenstein directly beneficially owned 1,003,163 shares and is associated with an additional 790,279 indirectly held shares via the Hohenstein Purple Elephant Trust. Sales were made under a Rule 10b5-1 plan adopted November 13, 2024.
OneStream, Inc. insider sale notice (Form 144) reports that Kenneth D. Hohenstein intends to sell 20,000 Class A shares on 08/18/2025 through Fidelity Brokerage Services LLC on NASDAQ, with an aggregate market value shown as $431,200 and 88,136,155 Class A shares outstanding. The filing shows the shares to be sold were acquired as an option granted 03/06/2023 and exercised/acquired on 08/18/2025 with payment in cash. The filer also disclosed four prior Class A sales by the same person in the past three months totalling 66,280 shares for gross proceeds of $1,798,661.79. The notice includes the standard representation that the seller is not aware of undisclosed material adverse information.
On 08/04/2025, OneStream, Inc. (OS) director Jonathan D. Mariner reported selling 6,630 Class A common shares through a Rule 10b5-1 trading plan adopted on 02/28/2025. The weighted-average sale price was $23.53 (range: $23.095-$23.79). After the transaction, he beneficially owns 33,650 shares, which include unvested restricted stock units. No derivative securities were exercised or acquired.
The sale represents a modest portion of the director’s holdings and, because it was pre-scheduled, is generally viewed as routine liquidity management rather than a directional bet. Nonetheless, any insider disposition can prompt investor scrutiny regarding short-term valuation expectations.
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