BlackLine, Inc. (BL) ownership: Top institutional holder: VANGUARD GROUP INC ($375.72M). Insider activity: Net Seller (0 buys, 20 sells). 3 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 6795523.00 | $375.72M | 2025-12-31 |
| BlackRock, Inc. | 7680962.00 | $284.20M | 2026-03-31 |
| CLEARLAKE CAPITAL GROUP, L.P. | 5712300.00 | $211.36M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4062856.00 | $150.33M | 2026-03-31 |
| UBS Group AG | 3203298.00 | $118.52M | 2026-03-31 |
| Fivespan Partners, LP | 3013943.00 | $111.52M | 2026-03-31 |
| FIRST MANHATTAN CO. LLC. | 2676987.00 | $99.05M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2349160.00 | $86.92M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-05 | |
| Sell | null | 2026-06-01 | |
| Sell | null | 2026-05-21 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 |
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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.