IOSP Innospec Inc.
Innospec Inc. (IOSP) Institutional Ownership
What the institutions did with IOSP last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 4.4M | 17.6% |
| Allspring Global Investments Holdings, LLC | 1.9M | 7.6% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.9M | 7.6% |
| DIMENSIONAL FUND ADVISORS LP | 1.3M | 5.2% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.1M | 4.5% |
| STATE STREET CORP | 996.0K | 4.0% |
| Nuveen, LLC | 755.7K | 3.0% |
| GEODE CAPITAL MANAGEMENT, LLC | 666.6K | 2.7% |
| GOLDMAN SACHS GROUP INC | 662.2K | 2.7% |
| VICTORY CAPITAL MANAGEMENT INC | 660.1K | 2.7% |
| TWO SIGMA INVESTMENTS, LP | 568.7K | 2.3% |
| Assenagon Asset Management S.A. | 545.6K | 2.2% |
| AQR CAPITAL MANAGEMENT LLC | 482.5K | 1.9% |
| BROWN ADVISORY INC | 408.5K | 1.6% |
| JPMORGAN CHASE & CO | 370.6K | 1.5% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 355.7K | 1.4% |
| GENDELL JEFFREY L | 324.5K | 1.3% |
| ROYCE & ASSOCIATES LP | 308.7K | 1.2% |
| NORTHERN TRUST CORP | 303.0K | 1.2% |
| Qube Research & Technologies Ltd | 285.8K | 1.1% |
| ACADIAN ASSET MANAGEMENT LLC | 274.0K | 1.1% |
| Western Standard LLC | 236.8K | 1.0% |
| BANK OF AMERICA CORP /DE/ | 235.7K | 0.9% |
| MORGAN STANLEY | 230.8K | 0.9% |
| RENAISSANCE TECHNOLOGIES LLC | 185.0K | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BlackRock, Inc. | Increased | 3.9M | 4.4M | +502.3K |
| Allspring Global Investments Holdings, LLC | Reduced | 2.3M | 1.9M | -423.5K |
| UBS Group AG | Reduced | 565.9K | 154.0K | -411.9K |
| VICTORY CAPITAL MANAGEMENT INC | Reduced | 865.0K | 660.1K | -204.9K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 312.1K | 482.5K | +170.5K |
| GOLDMAN SACHS GROUP INC | Increased | 492.0K | 662.2K | +170.2K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 122.6K | 274.0K | +151.4K |
| MACKENZIE FINANCIAL CORP | New | 0 | 144.7K | +144.7K |
| Point72 Asset Management, L.P. | Reduced | 166.8K | 42.6K | -124.1K |
| CITADEL ADVISORS LLC | Reduced | 220.9K | 98.5K | -122.3K |
| D. E. Shaw & Co., Inc. | Reduced | 286.8K | 165.7K | -121.0K |
| Qube Research & Technologies Ltd | Reduced | 406.6K | 285.8K | -120.8K |
| Nuveen, LLC | Increased | 643.2K | 755.7K | +112.5K |
| BROWN ADVISORY INC | Increased | 296.5K | 408.5K | +112.0K |
| JANE STREET GROUP, LLC | Sold Out | 94.5K | 0 | -94.5K |
| FIRST TRUST ADVISORS LP | Increased | 12.7K | 91.3K | +78.5K |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | 108.0K | 31.9K | -76.1K |
| SG Capital Management LLC | New | 0 | 71.0K | +71.0K |
| Creative Planning | Increased | 37.6K | 104.2K | +66.6K |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 118.9K | 185.0K | +66.1K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 1.2M | 1.3M | +62.9K |
| PANAGORA ASSET MANAGEMENT INC | Increased | 119.7K | 182.5K | +62.9K |
| MILLENNIUM MANAGEMENT LLC | Sold Out | 61.4K | 0 | -61.4K |
| Balyasny Asset Management L.P. | New | 0 | 59.8K | +59.8K |
| Engineers Gate Manager LP | Reduced | 64.7K | 6.3K | -58.3K |
| Leeward Investments, LLC - MA | Increased | 69.8K | 125.3K | +55.5K |
| JPMORGAN CHASE & CO | Reduced | 426.1K | 370.6K | -55.5K |
| BANK OF AMERICA CORP /DE/ | Reduced | 290.8K | 235.7K | -55.0K |
| Assenagon Asset Management S.A. | Increased | 490.9K | 545.6K | +54.7K |
| ROYCE & ASSOCIATES LP | Increased | 261.3K | 308.7K | +47.4K |
| Russell Investments Group, Ltd. | Increased | 71.6K | 118.6K | +47.0K |
| HRT FINANCIAL LP | Reduced | 125.1K | 84.3K | -40.7K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 630.6K | 666.6K | +36.0K |
| Penn Capital Management Company, LLC | Sold Out | 33.3K | 0 | -33.3K |
| STATE STREET CORP | Increased | 964.3K | 996.0K | +31.7K |
| FMR LLC | Increased | 51.8K | 82.8K | +31.0K |
| GENDELL JEFFREY L | Increased | 294.5K | 324.5K | +30.0K |
| DEPRINCE RACE & ZOLLO INC | Increased | 68.0K | 93.3K | +25.3K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 593.0K | 568.7K | -24.3K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 1.9M | 1.9M | +24.2K |
| ExodusPoint Capital Management, LP | New | 0 | 23.8K | +23.8K |
| SG Americas Securities, LLC | Reduced | 60.9K | 37.7K | -23.2K |
| CAPITAL FUND MANAGEMENT S.A. | Sold Out | 20.8K | 0 | -20.8K |
| Jump Financial, LLC | Reduced | 26.2K | 5.5K | -20.7K |
| Blackstone Inc. | New | 0 | 19.2K | +19.2K |
| NORTHERN TRUST CORP | Increased | 284.2K | 303.0K | +18.8K |
| Campbell & CO Investment Adviser LLC | Sold Out | 18.8K | 0 | -18.8K |
| Y-Intercept (Hong Kong) Ltd | Reduced | 33.3K | 14.8K | -18.5K |
| Aquatic Capital Management LLC | Sold Out | 18.2K | 0 | -18.2K |
| SEI INVESTMENTS CO | Reduced | 174.1K | 156.1K | -18.1K |
| Trexquant Investment LP | Reduced | 78.4K | 60.5K | -17.8K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | Reduced | 61.7K | 44.0K | -17.7K |
| TEACHER RETIREMENT SYSTEM OF TEXAS | Reduced | 103.1K | 85.5K | -17.6K |
| RAYMOND JAMES FINANCIAL INC | Sold Out | 17.5K | 0 | -17.5K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 18.5K | 34.9K | +16.4K |
| XTX Topco Ltd | Reduced | 36.3K | 20.2K | -16.1K |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | Increased | 120.8K | 135.7K | +14.9K |
| Summit Global Investments | Sold Out | 14.4K | 0 | -14.4K |
| DARK FOREST CAPITAL MANAGEMENT LP | Increased | 25.6K | 38.9K | +13.2K |
| Schonfeld Strategic Advisors LLC | Reduced | 26.3K | 13.3K | -13.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.