INNOSPEC INC. (IOSP) — Institutional Holders, Q2 2026
282 institutional investment managers reported a IOSP position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $2.0B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
IOSP in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- BlackRockAdded · +502,348 sh+$40.9M
- AQR CAPITAL MANAGEMENTAdded · +170,480 sh+$13.9M
- GOLDMAN SACHS GROUPAdded · +170,199 sh+$13.9M
- ACADIAN ASSET MANAGEMENTAdded · +151,447 sh+$12.3M
- MACKENZIE FINANCIALNew · +144,677 sh+$11.8M
Biggest sellers
- Allspring Global InvestmentsTrimmed · -423,471 sh-$34.5M
- UBS Group AGTrimmed · -411,910 sh-$33.5M
- Assenagon Asset Management S.A.Trimmed · -218,102 sh-$17.8M
- VICTORY CAPITAL MANAGEMENTTrimmed · -204,884 sh-$16.7M
- Point72 Asset Management, L.P.Trimmed · -124,146 sh-$10.1M
IOSP 13F holders ranked 1–100 of 282
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BlackRock#1 · 4,381,323 sh | 4,381,323 | $356.6M | <0.01% | +13.0% |
| 2 | Allspring Global Investments#2 · 1,892,471 sh | 1,892,471 | $154.7M | 0.24% | -18.3% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT#3 · 1,884,244 sh | 1,884,244 | $153.4M | <0.01% | +1.3% |
| 4 | DIMENSIONAL FUND ADVISORS#4 · 1,305,038 sh | 1,305,038 | $106.2M | 0.02% | +5.1% |
| 5 | VANGUARD CAPITAL MANAGEMENT#5 · 1,108,107 sh | 1,108,107 | $90.2M | <0.01% | -0.6% |
| 6 | STATE STREET#6 · 996,027 sh | 996,027 | $81.1M | <0.01% | +3.3% |
| 7 | Nuveen#7 · 755,723 sh | 755,723 | $61.5M | 0.01% | +17.5% |
| 8 | GEODE CAPITAL MANAGEMENT#8 · 666,589 sh | 666,589 | $54.3M | <0.01% | +5.7% |
| 9 | GOLDMAN SACHS GROUP#9 · 662,210 sh | 662,210 | $53.9M | <0.01% | +34.6% |
| 10 | VICTORY CAPITAL MANAGEMENT#10 · 660,110 sh | 660,110 | $53.7M | 0.03% | -23.7% |
| 11 | TWO SIGMA INVESTMENTS#11 · 568,709 sh | 568,709 | $46.3M | 0.03% | -4.1% |
| 12 | AQR CAPITAL MANAGEMENT#12 · 482,545 sh | 482,545 | $39.3M | 0.01% | +54.6% |
| 13 | BROWN ADVISORY#13 · 408,468 sh | 408,468 | $33.2M | 0.05% | +37.8% |
| 14 | JPMORGAN CHASE#14 · 370,574 sh | 370,574 | $30.0M | <0.01% | -13.0% |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT#15 · 355,658 sh | 355,658 | $28.9M | <0.01% | -2.8% |
| 16 | GENDELL JEFFREY L#16 · 324,504 sh | 324,504 | $26.4M | 0.23% | +10.2% |
| 17 | ROYCE & ASSOCIATES#17 · 308,726 sh | 308,726 | $25.1M | 0.20% | +18.1% |
| 18 | NORTHERN#18 · 303,044 sh | 303,044 | $24.7M | <0.01% | +6.6% |
| 19 | Qube Research & Technologies Ltd#19 · 285,849 sh | 285,849 | $23.3M | 0.02% | -29.7% |
| 20 | ACADIAN ASSET MANAGEMENT#20 · 273,999 sh | 273,999 | $22.3M | 0.03% | +123.6% |
| 21 | Assenagon Asset Management S.A.#21 · 272,782 sh | 272,782 | $22.2M | — | -44.4% |
| 22 | Western Standard#22 · 236,833 sh | 236,833 | $19.3M | 6.53% | +4.4% |
| 23 | BANK OF AMERICA#23 · 235,742 sh | 235,742 | $19.2M | <0.01% | -18.9% |
| 24 | MORGAN STANLEY#24 · 230,793 sh | 230,793 | $18.8M | <0.01% | -2.0% |
| 25 | RENAISSANCE TECHNOLOGIES#25 · 185,000 sh | 185,000 | $15.1M | 0.02% | +55.6% |
| 26 | PANAGORA ASSET MANAGEMENT#26 · 182,538 sh | 182,538 | $14.9M | 0.05% | +52.5% |
| 27 | D. E. Shaw#27 · 165,746 sh | 165,746 | $13.5M | <0.01% | -42.2% |
| 28 | VANGUARD FIDUCIARY#28 · 163,715 sh | 163,715 | $13.3M | <0.01% | +1.8% |
| 29 | SEI INVESTMENTS#29 · 156,051 sh | 156,051 | $12.7M | 0.01% | -10.4% |
| 30 | UBS Group AG#30 · 154,001 sh | 154,001 | $12.5M | <0.01% | -72.8% |
| 31 | FIRST WILSHIRE SECURITIES MANAGEMENT#31 · 147,112 sh | 147,112 | $12.0M | 2.47% | -0.6% |
| 32 | MACKENZIE FINANCIAL#32 · 144,677 sh | 144,677 | $11.8M | 0.01% | New |
| 33 | Bank of New York Mellon#33 · 137,261 sh | 137,261 | $11.2M | <0.01% | +4.5% |
| 34 | HOTCHKIS & WILEY CAPITAL MANAGEMENT#34 · 135,740 sh | 135,740 | $11.0M | 0.03% | +12.4% |
| 35 | Jupiter Topco#35 · 127,976 sh | 127,976 | $10.4M | <0.01% | — |
| 36 | Leeward Investments, - MA#36 · 125,308 sh | 125,308 | $10.2M | — | +79.5% |
| 37 | PRINCIPAL FINANCIAL GROUP#37 · 119,053 sh | 119,053 | $9.7M | <0.01% | -1.2% |
| 38 | Russell Investments Group, Ltd.#38 · 118,614 sh | 118,614 | $9.6M | <0.01% | +65.6% |
| 39 | Invesco Ltd.#39 · 118,427 sh | 118,427 | $9.6M | <0.01% | +0.3% |
| 40 | ZWJ INVESTMENT COUNSEL#40 · 108,502 sh | 108,502 | $8.8M | — | +4.5% |
| 41 | Creative Planning#41 · 104,224 sh | 104,224 | $8.5M | <0.01% | +176.9% |
| 42 | CITADEL ADVISORS#42 · 98,549 sh | 98,549 | $8.0M | <0.01% | -55.4% |
| 43 | DEPRINCE RACE & ZOLLO#43 · 93,348 sh | 93,348 | $7.6M | — | +37.2% |
| 44 | FIRST ADVISORS#44 · 91,252 sh | 91,252 | $7.4M | <0.01% | +617.6% |
| 45 | TEACHER RETIREMENT SYSTEM OF TEXAS#45 · 85,463 sh | 85,463 | $7.0M | 0.02% | -17.1% |
| 46 | PUBLIC SECTOR PENSION INVESTMENT BOARD#46 · 84,577 sh | 84,577 | $6.9M | 0.02% | -4.6% |
| 47 | HRT FINANCIAL#47 · 84,349 sh | 84,349 | $6.9M | 0.02% | -32.6% |
| 48 | MUTUAL OF AMERICA CAPITAL MANAGEMENT#48 · 82,920 sh | 82,920 | $6.7M | — | -5.2% |
| 49 | FMR#49 · 82,759 sh | 82,759 | $6.7M | <0.01% | +59.8% |
| 50 | ProShare Advisors#50 · 81,232 sh | 81,232 | $6.6M | <0.01% | -9.6% |
| 51 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#51 · 73,457 sh | 73,457 | $6.0M | <0.01% | -1.3% |
| 52 | SG Capital Management#52 · 71,022 sh | 71,022 | $5.8M | 0.48% | New |
| 53 | Numerai GP#53 · 66,931 sh | 66,931 | $5.4M | 0.45% | -12.6% |
| 54 | RHUMBLINE ADVISERS#54 · 65,055 sh | 65,055 | $5.3M | <0.01% | -8.6% |
| 55 | Trexquant Investment#55 · 60,528 sh | 60,528 | $4.9M | 0.03% | -22.8% |
| 56 | BALYASNY ASSET MANAGEMENT L.P.#56 · 59,751 sh | 59,751 | $4.9M | <0.01% | New |
| 57 | Legal & General Group Plc#57 · 58,841 sh | 58,841 | $4.8M | <0.01% | -0.5% |
| 58 | AMERICAN CENTURY COMPANIES#58 · 55,093 sh | 55,093 | $4.5M | <0.01% | -0.3% |
| 59 | AMERIPRISE FINANCIAL#59 · 54,517 sh | 54,517 | $4.4M | <0.01% | -3.6% |
| 60 | Swiss National Bank#60 · 49,903 sh | 49,903 | $4.1M | <0.01% | +1.8% |
| 61 | IEQ CAPITAL#61 · 45,343 sh | 45,343 | $3.7M | 0.02% | +13.5% |
| 62 | HEALTHCARE OF ONTARIO PENSION PLAN FUND#62 · 43,995 sh | 43,995 | $3.6M | <0.01% | -28.7% |
| 63 | Point72 Asset Management, L.P.#63 · 42,648 sh | 42,648 | $3.5M | <0.01% | -74.4% |
| 64 | Atom Investors#64 · 40,870 sh | 40,870 | $3.3M | 0.30% | +0.2% |
| 65 | BNP PARIBAS FINANCIAL MARKETS#65 · 39,514 sh | 39,514 | $3.2M | <0.01% | +4.1% |
| 66 | DARK FOREST CAPITAL MANAGEMENT#66 · 38,862 sh | 38,862 | $3.2M | 0.20% | +51.6% |
| 67 | FRANKLIN RESOURCES#67 · 38,748 sh | 38,748 | $3.2M | <0.01% | +15.7% |
| 68 | INTECH INVESTMENT MANAGEMENT#68 · 38,292 sh | 38,292 | $3.1M | 0.03% | -14.8% |
| 69 | SG Americas Securities#69 · 37,665 sh | 37,665 | $3.1M | <0.01% | -38.1% |
| 70 | PRICE T ROWE ASSOCIATES#70 · 37,345 sh | 37,345 | $3.0M | <0.01% | +17.3% |
| 71 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#71 · 34,876 sh | 34,876 | $2.8M | <0.01% | +88.5% |
| 72 | CM Management#72 · 32,000 sh | 32,000 | $2.6M | 1.65% | +33.3% |
| 73 | VOLORIDGE INVESTMENT MANAGEMENT#73 · 31,857 sh | 31,857 | $2.6M | 0.01% | -70.5% |
| 74 | Cerity Partners#74 · 31,315 sh | 31,315 | $2.5M | <0.01% | +39.1% |
| 75 | PDT Partners#75 · 31,176 sh | 31,176 | $2.5M | 0.13% | -9.8% |
| 76 | WELLS FARGO & COMPANY#76 · 30,221 sh | 30,221 | $2.5M | <0.01% | +71.5% |
| 77 | Edgestream Partners, L.P.#77 · 29,208 sh | 29,208 | $2.4M | 0.07% | -14.7% |
| 78 | Huber Capital Management#78 · 29,148 sh | 29,148 | $2.4M | 0.35% | +15.9% |
| 79 | INGALLS & SNYDER#79 · 28,927 sh | 28,927 | $2.4M | 0.06% | 0.0% |
| 80 | DEUTSCHE BANK AG\#80 · 27,565 sh | 27,565 | $2.2M | <0.01% | +21.2% |
| 81 | Mariner#81 · 26,935 sh | 26,935 | $2.2M | <0.01% | +36.7% |
| 82 | VOYA INVESTMENT MANAGEMENT#82 · 25,915 sh | 25,915 | $2.1M | <0.01% | +3.3% |
| 83 | CITIGROUP#83 · 25,692 sh | 25,692 | $2.1M | <0.01% | +8.0% |
| 84 | ALLIANCEBERNSTEIN L.P.#84 · 28,622 sh | 28,622 | $2.1M | <0.01% | +8.0% |
| 85 | PRUDENTIAL FINANCIAL#85 · 25,529 sh | 25,529 | $2.1M | <0.01% | +1.0% |
| 86 | BARCLAYS PLC#86 · 24,713 sh | 24,713 | $2.0M | <0.01% | +16.6% |
| 87 | ExodusPoint Capital Management#87 · 23,810 sh | 23,810 | $1.9M | 0.01% | New |
| 88 | HSBC PLC#88 · 23,693 sh | 23,693 | $1.9M | <0.01% | -6.5% |
| 89 | Holocene Advisors#89 · 23,760 sh | 23,760 | $1.9M | <0.01% | -10.2% |
| 90 | Moran Wealth Management#90 · 23,639 sh | 23,639 | $1.9M | — | -12.5% |
| 91 | CONNORS INVESTOR SERVICES#91 · 23,363 sh | 23,363 | $1.9M | 0.16% | -29.4% |
| 92 | KLP KAPITALFORVALTNING AS#92 · 23,300 sh | 23,300 | $1.9M | <0.01% | 0.0% |
| 93 | MARSHALL WACE, LLP#93 · 23,075 sh | 23,075 | $1.9M | <0.01% | -31.2% |
| 94 | WEDGE CAPITAL MANAGEMENT L L P#94 · 20,329 sh | 20,329 | $1.7M | — | -5.3% |
| 95 | XTX Topco Ltd#95 · 20,188 sh | 20,188 | $1.6M | 0.02% | -44.4% |
| 96 | Linden Thomas Advisory Services#96 · 19,815 sh | 19,815 | $1.6M | — | +67.8% |
| 97 | VANGUARD ASSET MANAGEMENT, Ltd#97 · 19,560 sh | 19,560 | $1.6M | <0.01% | +13.2% |
| 98 | GREAT WEST LIFE ASSURANCE#98 · 19,508 sh | 19,508 | $1.6M | <0.01% | -3.9% |
| 99 | Blackstone#99 · 19,163 sh | 19,163 | $1.6M | <0.01% | New |
| 100 | Brevan Howard Capital Management#100 · 17,540 sh | 17,540 | $1.4M | 0.01% | -28.2% |
Funds that sold out of IOSP in Q2 2026 (28)
Held IOSP at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| JANE STREET GROUP94,506 sh | 94,506 | $6.9M |
| MILLENNIUM MANAGEMENT61,427 sh | 61,427 | $4.5M |
| Penn Capital Management Company33,286 sh | 33,286 | $2.4M |
| CAPITAL FUND MANAGEMENT S.A.20,834 sh | 20,834 | $1.5M |
| Campbell & Investment Adviser18,751 sh | 18,751 | $1.4M |
| Aquatic Capital Management18,185 sh | 18,185 | $1.3M |
| RAYMOND JAMES FINANCIAL17,515 sh | 17,515 | $1.3M |
| Summit Global Investments14,430 sh | 14,430 | $1.1M |
| MIRABELLA FINANCIAL SERVICES LLP10,359 sh | 10,359 | $756.4K |
| HUDSON EDGE INVESTMENT PARTNERS8,373 sh | 8,373 | $611.4K |
| AXQ CAPITAL6,784 sh | 6,784 | $495.4K |
| Bridgewater Associates5,950 sh | 5,950 | $434.5K |
| CAXTON ASSOCIATES LLP4,726 sh | 4,726 | $345.1K |
| BAILARD4,700 sh | 4,700 | $343.2K |
| R Squared Ltd4,363 sh | 4,363 | $318.6K |
| Polymer Capital Management (US)4,269 sh | 4,269 | $311.7K |
| ENVESTNET ASSET MANAGEMENT3,928 sh | 3,928 | $286.8K |
| State of Wyoming3,918 sh | 3,918 | $286.1K |
| TUDOR INVESTMENT ET AL3,784 sh | 3,784 | $276.3K |
| DRW Securities3,229 sh | 3,229 | $235.8K |
| Virtu Financial2,885 sh | 2,885 | $211.0K |
| QUADRANT CAPITAL GROUP106 sh | 106 | $52.8K |
| Root Financial Partners164 sh | 164 | $12.0K |
| Advisory Services Network88 sh | 88 | $6.4K |
| Larson Financial Group24 sh | 24 | $1.8K |
| James T. Borello RIA12 sh | 12 | $876.00 |
| Abound Wealth Management2 sh | 2 | $147.00 |
| Vermillion Wealth Management1 sh | 1 | $73.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.