InnospecIOSP
13F holders, Q4 2025 (December 31)260holders −6
24new positions
29sold out
6famous investors
$76.52avg. 13F price*
At the end of Q4 2025, 260 institutions reported holding Innospec Inc. (IOSP) in their 13F filings, down 6 from Q3 2025. 24 opened new positions and 29 sold out. The largest holders were BlackRock, Inc. ($280.3M), Vanguard Group Inc. ($238.9M) and Allspring Global Investments Holdings, LLC ($179.8M). 6 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Innospec Inc.
- CUSIP
- 45768S105
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 24 | $15.3M |
| Exits | 29 | $9.7M |
All 13F filers, Q3 2025 → Q4 2025: 2,128,780 shares bought and 1,765,508 shares sold, net +363,272 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 260 holders
| BlackRock, Inc. | 0.00% | Add +0.8% | 3,662,323 | $280.3M |
| Vanguard Group Inc. | 0.00% | Reduce -0.7% | 3,121,151 | $238.9M |
| Allspring Global Investments Holdings, LLC | 0.29% | Reduce -1.5% | 2,356,503 | $179.8M |
| Dimensional Fund Advisors LP | 0.02% | Add +0.7% | 1,175,122 | $89.9M |
| Victory Capital Management Inc. | 0.04% | Add +13.7% | 950,074 | $72.7M |
| State Street Corp. | 0.00% | Add +2.1% | 949,038 | $72.6M |
| Geode Capital Management, LLC | 0.00% | Reduce -0.8% | 609,220 | $46.6M |
| Millennium Management | 0.03% | Add +10.8% | 533,312 | $40.8M |
| Nuveen, LLC | 0.01% | Add +22.2% | 502,603 | $38.5M |
| Westwood Holdings Group Inc. | 0.31% | Add +9.7% | 491,451 | $37.6M |
| Goldman Sachs Group Inc. | 0.01% | Add +71.6% | 484,968 | $37.1M |
| Medina Value Partners, LLC | 6.77% | Add +60.5% | 378,769 | $29.0M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +3.6% | 373,540 | $28.6M |
| Bank of America Corp. | 0.00% | Reduce -14.1% | 322,358 | $24.7M |
| Qube Research & Technologies Ltd | 0.04% | Reduce -9.5% | 320,504 | $24.5M |
| D. E. Shaw & Co. | 0.02% | Add +13.2% | 309,927 | $23.7M |
| Brown Advisory Inc. | 0.03% | Reduce -12.6% | 305,977 | $23.4M |
| JPMorgan Chase & Co. | 0.00% | Reduce -4.7% | 305,875 | $23.4M |
| Royce & Associates LP | 0.24% | Reduce -38.0% | 305,226 | $23.4M |
| Gendell Jeffrey L | 0.38% | Add +63.1% | 285,351 | $21.8M |
| Northern Trust Corp. | 0.00% | Reduce -8.2% | 274,689 | $21.0M |
| Western Standard LLC | 9.47% | Add +894.0% | 268,367 | $20.5M |
| AQR Capital Management | 0.01% | Add +48.0% | 268,151 | $20.5M |
| Morgan Stanley | 0.00% | Reduce -4.0% | 243,535 | $18.6M |
| Assenagon Asset Management S.A. | 0.02% | Add +37.7% | 178,204 | $13.6M |
| Two Sigma Investments, LP | 0.02% | Add +7.6% | 159,514 | $12.2M |
| Two Sigma Advisers, LP | 0.02% | Add +0.6% | 159,200 | $12.2M |
| Janus Henderson Group PLC | 0.01% | Reduce -41.5% | 150,851 | $11.5M |
| UBS Group AG | 0.00% | Reduce -13.9% | 142,055 | $10.9M |
| Norges Bank | 0.00% | — | 139,200 | $10.7M |
| Voloridge Investment Management, LLC | 0.04% | Add +9.8% | 138,401 | $10.6M |
| Bank of New York Mellon Corp | 0.00% | Reduce -36.0% | 137,828 | $10.5M |
| Hotchkis & Wiley Capital Management LLC | 0.03% | Add +12.2% | 125,062 | $9.6M |
| Renaissance Technologies | 0.01% | Reduce -17.9% | 120,300 | $9.2M |
| Principal Financial Group Inc. | 0.00% | Reduce -1.5% | 118,107 | $9.0M |
| HRT Financial LP | 0.03% | Add +30.6% | 116,932 | $8.9M |
| Jane Street Group, LLC | 0.01% | Add +17.5% | 108,961 | $8.3M |
| Invesco Ltd. | 0.00% | Add +29.4% | 104,639 | $8.0M |
| Walleye Capital LLC | 0.05% | Reduce -31.1% | 103,935 | $8.0M |
| Sei Investments Co. | 0.01% | Add +55.9% | 103,702 | $7.9M |
| First Wilshire Securities Management Inc. | 1.94% | New | 100,574 | $7.7M |
| Numerai GP LLC | 0.91% | Add +20.5% | 98,269 | $7.5M |
| Point72 Asset Management | 0.01% | Add +712.1% | 95,775 | $7.3M |
| ZWJ Investment Counsel Inc. | 0.26% | Add +110.9% | 94,535 | $7.2M |
| Mutual of America Capital Management LLC | 0.07% | Add +16.1% | 87,921 | $6.7M |
| Public Sector Pension Investment Board | 0.02% | Reduce -11.5% | 85,714 | $6.6M |
| Teacher Retirement System of Texas | 0.02% | Add +35.3% | 84,425 | $6.5M |
| ProShare Advisors LLC | 0.01% | Add +8.4% | 83,739 | $6.4M |
| Panagora Asset Management Inc. | 0.02% | Add +3.3% | 82,098 | $6.3M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +1.7% | 78,672 | $6.0M |
| SG Americas Securities, LLC | 0.01% | Add +291.0% | 75,814 | $5.8M |
| Citadel Advisors | 0.00% | Reduce -12.8% | 72,694 | $5.6M |
| Leeward Investments, LLC - MA | 0.28% | Reduce -0.6% | 71,687 | $5.5M |
| Rhumbline Advisers | 0.00% | Reduce -3.2% | 70,197 | $5.4M |
| Healthcare of Ontario Pension Plan Trust Fund | 0.01% | Add +74.6% | 68,049 | $5.2M |
| Legal & General Group Plc | 0.00% | Reduce -4.2% | 62,461 | $4.8M |
| Ameriprise Financial Inc. | 0.00% | Add +0.5% | 60,287 | $4.6M |
| American Century Companies Inc. | 0.00% | Reduce -13.4% | 54,316 | $4.2M |
| Intech Investment Management LLC | 0.04% | Add +139.4% | 51,556 | $3.9M |
| Engineers Gate Manager LP | 0.05% | Add +22.5% | 49,862 | $3.8M |
| Swiss National Bank | 0.00% | Add +1.2% | 49,003 | $3.8M |
| Edgestream Partners, L.P. | 0.10% | Add +11.8% | 46,434 | $3.6M |
| Trexquant Investment LP | 0.03% | Add +79.5% | 46,073 | $3.5M |
| Barclays PLC | 0.00% | Reduce -1.1% | 45,848 | $3.5M |
| Creative Planning | 0.00% | Add +227.9% | 44,693 | $3.4M |
| Dark Forest Capital Management LP | 0.16% | Add +31.7% | 44,524 | $3.4M |
| PDT Partners, LLC | 0.21% | No change | 42,876 | $3.3M |
| AlphaQuest LLC | 0.18% | Reduce -6.5% | 42,228 | $3.2M |
| Moran Wealth Management, LLC | 0.10% | Reduce -5.2% | 42,035 | $3.2M |
| Ieq Capital, LLC | 0.01% | Add +50.7% | 39,774 | $3.0M |
| FMR LLC | 0.00% | Add +3570.1% | 36,921 | $2.8M |
| Wells Fargo & Company | 0.00% | Add +3.5% | 35,091 | $2.7M |
| Algert Global LLC | 0.04% | Reduce -1.3% | 34,278 | $2.6M |
| Connors Investor Services Inc. | 0.21% | Reduce -3.4% | 32,525 | $2.5M |
| State of New Jersey Common Pension Fund D | 0.01% | Add +19.7% | 30,314 | $2.3M |
| Ingalls & Snyder LLC | 0.08% | No change | 28,927 | $2.2M |
| Franklin Resources Inc. | 0.00% | Add +2.3% | 28,511 | $2.2M |
| T. Rowe Price Associates Inc. | 0.00% | Add +21.5% | 28,383 | $2.2M |
| Alliancebernstein L.P. | 0.00% | Reduce -1.1% | 26,923 | $2.1M |
| Verition Fund Management LLC | 0.01% | Reduce -37.3% | 26,664 | $2.0M |
| Canada Pension Plan Investment Board | 0.00% | No change | 26,000 | $2.0M |
| Voya Investment Management LLC | 0.00% | Reduce -37.2% | 25,264 | $1.9M |
| Y-Intercept (Hong Kong) Ltd | 0.04% | Reduce -18.4% | 24,614 | $1.9M |
| California State Teachers Retirement System | 0.00% | Add +3.2% | 23,800 | $1.8M |
| Prudential Financial Inc. | 0.00% | Reduce -6.7% | 23,464 | $1.8M |
| Atom Investors LP | 0.14% | Add +566.6% | 22,830 | $1.7M |
| Huber Capital Management LLC | 0.25% | No change | 22,548 | $1.7M |
| Jump Financial, LLC | 0.02% | Reduce -20.0% | 22,300 | $1.7M |
| Jain Global LLC | 0.02% | New | 22,159 | $1.7M |
| Capital Fund Management S.A. | 0.02% | Add +73.9% | 21,877 | $1.7M |
| CANADA LIFE ASSURANCE Co | 0.00% | Reduce -28.2% | 21,279 | $1.6M |
| Public Employees Retirement System of Ohio | 0.00% | Add +16.2% | 20,136 | $1.5M |
| CM Management, LLC | 1.29% | Add +66.7% | 20,000 | $1.5M |
| Wedge Capital Management L L P | 0.03% | Add +20.5% | 19,699 | $1.5M |
| Deutsche Bank AG | 0.00% | Reduce -52.1% | 19,665 | $1.5M |
| Cerity Partners LLC | 0.00% | Reduce -8.2% | 19,309 | $1.5M |
| Holocene Advisors, LP | 0.00% | Reduce -22.4% | 19,045 | $1.5M |
| Citigroup Inc. | 0.00% | Reduce -20.4% | 17,713 | $1.4M |
| Schonfeld Strategic Advisors LLC | 0.01% | Reduce -30.0% | 17,677 | $1.4M |
| ExodusPoint Capital Management, LP | 0.01% | Reduce -63.7% | 17,622 | $1.3M |
"% of holder's portfolio" is IOSP's weight in each manager's 13F, not the share of Innospec Inc. the manager owns.