Axcelis Technologies, Inc. (ACLS) ownership: Top institutional holder: BlackRock, Inc. ($459.51M). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 4936774.00 | $459.51M | 2026-03-31 |
| VANGUARD GROUP INC | 4122529.00 | $331.20M | 2025-12-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2488293.00 | $231.61M | 2026-03-31 |
| FMR LLC | 2431121.00 | $226.29M | 2026-03-31 |
| REINHART PARTNERS, LLC. | 1657745.00 | $154.30M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1382770.00 | $128.71M | 2026-03-31 |
| Balyasny Asset Management L.P. | 1364540.00 | $127.01M | 2026-03-31 |
| VICTORY CAPITAL MANAGEMENT INC | 1279005.00 | $119.05M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-06-03 | |
| Sell | null | 2026-06-02 | |
| Sell | null | 2026-06-02 | |
| Sell | null | 2026-05-27 | |
| Sell | null | 2026-05-27 | |
| Sell | null | 2026-05-22 |
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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.