7 institutions reported holding $22.3M of INNOSPEC INC COM (IOSP) in SEC 13F filings for 2026-06-30. Largest institutional holders: Assenagon Asset Management S.A. ($22.2M), GAMMA Investing LLC ($44,358), Versant Capital Management, Inc ($36,788), Cedar Mountain Advisors, LLC ($3,174), MassMutual Private Wealth & Trust, FSB ($2,360). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Assenagon Asset Management S.A. | $22.2M | 272,782 | Trimmed |
| 2 | GAMMA Investing LLC | $44,358 | 545 | Added |
| 3 | Versant Capital Management, Inc | $36,788 | 452 | Added |
| 4 | Cedar Mountain Advisors, LLC | $3,174 | 39 | Hold |
| 5 | MassMutual Private Wealth & Trust, FSB | $2,360 | 29 | Hold |
| 6 | Noble Wealth Management PBC | $1,546 | 19 | New |
| 7 | CoreCap Advisors, LLC | $81 | 1 | New |
Source: SEC Form 13F filings · as of 2026-06-30