One Stop Systems, Inc. (OSS) ownership: Top institutional holder: VANGUARD GROUP INC ($7.57M). Insider activity: Net Seller (6 buys, 14 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 1054266.00 | $7.57M | 2025-12-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 959588.00 | $7.26M | 2026-03-31 |
| JANE STREET GROUP, LLC | 874558.00 | $6.62M | 2026-03-31 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 693493.00 | $4.98M | 2025-12-31 |
| BlackRock, Inc. | 597303.00 | $4.52M | 2026-03-31 |
| BARD ASSOCIATES INC | 540666.00 | $4.09M | 2026-03-31 |
| MORGAN STANLEY | 431919.00 | $3.27M | 2026-03-31 |
| MARSHALL WACE, LLP | 418978.00 | $3.17M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-26 | |
| Sell | null | 2026-05-26 | |
| Sell | null | 2026-05-26 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Buy | null | 2026-05-11 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.