Innospec Inc. (IOSP) ownership: Top institutional holder: BlackRock, Inc. ($283.24M). Insider activity: Net Seller (4 buys, 16 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 3878975.00 | $283.24M | 2026-03-31 |
| VANGUARD GROUP INC | 3121151.00 | $238.89M | 2025-12-31 |
| Allspring Global Investments Holdings, LLC | 2315942.00 | $170.45M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1860091.00 | $135.82M | 2026-03-31 |
| BlackRock Fund Advisors | 1903280.00 | $130.38M | 2016-12-31 |
| DIMENSIONAL FUND ADVISORS LP | 1242089.00 | $90.70M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1114598.00 | $81.39M | 2026-03-31 |
| STATE STREET CORP | 964335.00 | $70.42M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-03-03 | |
| Sell | null | 2026-02-27 | |
| Sell | null | 2026-02-27 | |
| Sell | null | 2026-02-27 | |
| Sell | null | 2026-02-27 | |
| Sell | null | 2026-02-27 | |
| Sell | null | 2026-02-27 | |
| Sell | null | 2026-02-27 |
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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.