🕵️ Onestream, Inc. ($OS)
SEC insider & ownership activity, last 12 months · CIK 1889956 · every row links its SEC filing
Over the last 12 months insiders sold $11.1M with no open-market buying against it. Hohenstein Ken sold $9.0M through a program of 9 sale notices averaging $1.0M (Aug–Mar). One red-flag 8-K in the window: Delisting notice (3.01), Apr 1, 2026.
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 6 sellers, $11.1M (21 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Hohenstein Ken | 0 | – | 10 | $9.0M | Mar 17, 2026 |
| Jonathan D. Mariner | 0 | – | 5 | $729K | Jan 6, 2026 |
| Kinzer John | 0 | – | 1 | $600K | Sep 19, 2025 |
| William A. Koefoed | 0 | – | 2 | $340K | Dec 15, 2025 |
| McIntyre Pamela | 0 | – | 2 | $201K | Mar 11, 2026 |
| Leshinski Scott | 0 | – | 1 | $176K | Mar 11, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| KKR Group Partnership L.P. | 67.5% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Group Holdings Corp. | 67.5% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Group Co. Inc. | 67.5% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR & Co. Inc. | 67.5% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Management LLP | 67.5% | 13G | Feb 12, 2025 | filing ↗ | |
| Henry R. Kravis | 67.5% | 13G | Feb 12, 2025 | filing ↗ | |
| George R. Roberts | 67.5% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Associates Americas XII AIV L.P. | 62.3% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Americas XII AIV GP LLC | 62.3% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Dream Holdings LLC | 50.2% | 13G | Feb 12, 2025 | filing ↗ | |
| Kkr Dream Aggregator L.p. | 50.2% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Dream Aggregator GP LLC | 50.2% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Americas Fund XII (DREAM) L.P. | 50.2% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Americas XII (DREAM) Blocker Parent L.P. | 36.6% | 13G | Feb 12, 2025 | filing ↗ | |
| Thomas Anthony Shea | 16.3% | 13G | Feb 13, 2026 | filing ↗ | |
| Kkr Associates Ngt L.p. | 15.3% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Next GEN Tech Growth Limited | 15.3% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR NGT (DREAM) Blocker Parent L.P. | 13.5% | 13G | Feb 12, 2025 | filing ↗ | |
| Craig Colby | 10.9% | 13G | May 14, 2025 | filing ↗ | |
| Kkr-Milton Strategic Partners L.P. | 10.4% | 13G | Feb 12, 2025 | filing ↗ | |
| KKR Associates Milton Strategic L.P. | 10.4% | 13G | Feb 12, 2025 | filing ↗ | |
| Kkr Milton Strategic Limited | 10.4% | 13G | Feb 12, 2025 | filing ↗ | |
| Glazer Capital, LLC | 6.8% | 13G | Feb 9, 2026 | filing ↗ | |
| Paul J. Glazer | 6.8% | 13G | Feb 9, 2026 | filing ↗ | |
| KKR Americas XII EEA (DREAM) Blocker Parent L.P. | 6.7% | 13G | Feb 12, 2025 | filing ↗ | |
| Virtus Equity Trust On Behalf of Virtus KAR Small CAP Growth Fund | 6.0% | 13G | May 14, 2025 | filing ↗ | |
| Darlington Partners GP, LLC | 5.3% | 13G | Mar 25, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Hohenstein Ken | $236K | Mar 17, 2026 | filing ↗ |
| Hohenstein Ken | $1.2M | Mar 16, 2026 | filing ↗ |
| Leshinski Scott | $176K | Mar 11, 2026 | filing ↗ |
| Hohenstein Ken | $1.4M | Feb 17, 2026 | filing ↗ |
| Hohenstein Ken | $2.8M | Jan 16, 2026 | filing ↗ |
| Jonathan Mariner | $188K | Jan 6, 2026 | filing ↗ |
| Hohenstein Ken | $688K | Dec 16, 2025 | filing ↗ |
| William A. Koefoed | $170K | Dec 15, 2025 | filing ↗ |
| Hohenstein Ken | $860K | Nov 17, 2025 | filing ↗ |
| Hohenstein Ken | $674K | Oct 16, 2025 | filing ↗ |
| Kinzer John | $600K | Sep 19, 2025 | filing ↗ |
| Hohenstein Ken | $740K | Sep 16, 2025 | filing ↗ |
| William A. Koefoed | $170K | Sep 15, 2025 | filing ↗ |
| Jonathan Mariner | $371K | Sep 3, 2025 | filing ↗ |
| Hohenstein Ken | $431K | Aug 18, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Material agreement (1.01) | Apr 1, 2026 | filing ↗ |
| Agreement terminated (1.02) | Apr 1, 2026 | filing ↗ |
| Acquisition or disposition (2.01) | Apr 1, 2026 | filing ↗ |
| Delisting notice (3.01) | Apr 1, 2026 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Apr 1, 2026 | filing ↗ |
| Change of control (5.01) | Apr 1, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Apr 1, 2026 | filing ↗ |
| Other events (8.01) | Apr 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 1, 2026 | filing ↗ |
| Earnings (2.02) | Feb 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 26, 2026 | filing ↗ |
| Material agreement (1.01) | Jan 6, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jan 6, 2026 | filing ↗ |
| Other events (8.01) | Jan 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 6, 2026 | filing ↗ |
| Officer/director changes (5.02) | Nov 25, 2025 | filing ↗ |
| Officer/director changes (5.02) | Nov 25, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 25, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 25, 2025 | filing ↗ |
| Earnings (2.02) | Nov 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 6, 2025 | filing ↗ |
| Officer/director changes (5.02) | Oct 3, 2025 | filing ↗ |
| Earnings (2.02) | Aug 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 7, 2025 | filing ↗ |