InnospecIOSP

13F holders, Q1 2026 (March 31)
266holders +6
34new positions
28sold out
9famous investors
$73.08avg. 13F price*

At the end of Q1 2026, 266 institutions reported holding Innospec Inc. (IOSP) in their 13F filings, up 6 from Q4 2025. 34 opened new positions and 28 sold out. The largest holders were BlackRock, Inc. ($283.2M), Allspring Global Investments Holdings, LLC ($170.5M) and Vanguard Portfolio Management LLC ($135.8M). 9 famous investors held it, including Steve Cohen (0.0% of Point72 Asset 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

0100200300 Q1 2024: 237Q1 2024Q2 2024: 265Q2 2024Q3 2024: 260Q3 2024Q4 2024: 262Q4 2024Q1 2025: 272Q1 2025Q2 2025: 262Q2 2025Q3 2025: 266Q3 2025Q4 2025: 260Q4 2025Q1 2026: 266Q1 2026Q2 2026: 281Q2 2026

Total Exit/New Position Q4 2025 → Q1 2026

InstitutionsTotal Value
New Positions34$21.0M
Exits28$88.0M

All 13F filers, Q4 2025 → Q1 2026: 3,165,120 shares bought and 2,210,383 shares sold, net +954,737 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.

Ownership 266 holders

BlackRock, Inc. 0.01% Add +5.9% 3,878,975 $283.2M
Allspring Global Investments Holdings, LLC 0.29% Reduce -1.7% 2,315,942 $170.5M
Vanguard Portfolio Management LLC 0.01% — 1,860,091 $135.8M
Dimensional Fund Advisors LP 0.02% Add +5.7% 1,242,089 $90.7M
Vanguard Capital Management LLC 0.00% — 1,114,598 $81.4M
State Street Corp. 0.00% Add +1.6% 964,335 $70.4M
Victory Capital Management Inc. 0.04% Reduce -9.0% 864,994 $63.2M
Nuveen, LLC 0.01% Add +28.0% 643,248 $47.0M
Geode Capital Management, LLC 0.00% Add +3.5% 630,592 $46.1M
Two Sigma Investments, LP 0.04% Add +271.8% 593,039 $43.3M
UBS Group AG 0.01% Add +298.4% 565,911 $41.3M
Goldman Sachs Group Inc. 0.00% Add +1.4% 492,011 $35.9M
Assenagon Asset Management S.A. 0.06% Add +175.5% 490,884 $35.8M
JPMorgan Chase & Co. 0.00% Add +39.3% 426,050 $31.2M
Qube Research & Technologies Ltd 0.04% Add +26.9% 406,624 $29.7M
Charles Schwab Investment Management Inc. 0.00% Reduce -2.0% 365,874 $26.7M
AQR Capital Management 0.01% Add +16.4% 312,065 $22.8M
Brown Advisory Inc. 0.04% Reduce -3.1% 296,465 $21.6M
Gendell Jeffrey L 0.29% Add +3.2% 294,504 $21.5M
Bank of America Corp. 0.00% Reduce -9.8% 290,766 $21.2M
D. E. Shaw & Co. 0.02% Reduce -7.5% 286,794 $20.9M
Northern Trust Corp. 0.00% Add +3.5% 284,239 $20.8M
Royce & Associates LP 0.19% Reduce -14.4% 261,336 $19.1M
Morgan Stanley 0.00% Reduce -3.3% 235,571 $17.2M
Western Standard LLC 8.71% Reduce -15.5% 226,833 $16.6M
Citadel Advisors 0.01% Add +203.8% 220,883 $16.1M
Sei Investments Co. 0.01% Add +67.9% 174,121 $12.7M
Point72 Asset Management 0.02% Add +74.2% 166,794 $12.2M
Vanguard Fiduciary Trust Co. 0.00% — 160,752 $11.7M
First Wilshire Securities Management Inc. 2.44% Add +47.2% 148,072 $10.8M
Janus Henderson Group PLC 0.00% Reduce -11.7% 133,272 $9.7M
Bank of New York Mellon Corp 0.00% Reduce -4.7% 131,291 $9.6M
HRT Financial LP 0.02% Add +7.0% 125,055 $9.1M
Acadian Asset Management LLC 0.01% Add +765.5% 122,552 $8.9M
Hotchkis & Wiley Capital Management LLC 0.03% Reduce -3.4% 120,810 $8.8M
Principal Financial Group Inc. 0.00% Add +2.0% 120,477 $8.8M
Panagora Asset Management Inc. 0.03% Add +45.8% 119,675 $8.7M
Renaissance Technologies 0.01% Reduce -1.2% 118,900 $8.7M
Invesco Ltd. 0.00% Add +12.8% 118,084 $8.6M
Voloridge Investment Management, LLC 0.03% Reduce -22.0% 107,963 $7.9M
ZWJ Investment Counsel Inc. 0.27% Add +9.8% 103,787 $7.6M
Teacher Retirement System of Texas 0.03% Add +22.1% 103,102 $7.5M
Jane Street Group, LLC 0.01% Reduce -13.3% 94,506 $6.9M
ProShare Advisors LLC 0.01% Add +7.3% 89,841 $6.6M
Public Sector Pension Investment Board 0.02% Add +3.5% 88,694 $6.5M
Mutual of America Capital Management LLC 0.07% Reduce -0.5% 87,463 $6.4M
Trexquant Investment LP 0.04% Add +70.1% 78,370 $5.7M
Numerai GP LLC 0.56% Reduce -22.0% 76,616 $5.6M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% Reduce -5.4% 74,443 $5.4M
Russell Investments Group, Ltd. 0.01% Add +515.8% 71,607 $5.2M
Rhumbline Advisers 0.00% Add +1.4% 71,157 $5.2M
Leeward Investments, LLC - MA 0.25% Reduce -2.6% 69,810 $5.1M
Deprince Race & Zollo Inc. 0.09% New 68,029 $5.0M
Engineers Gate Manager LP 0.06% Add +29.7% 64,682 $4.7M
Healthcare of Ontario Pension Plan Trust Fund 0.01% Reduce -9.4% 61,669 $4.5M
Millennium Management 0.00% Reduce -88.5% 61,427 $4.5M
SG Americas Securities, LLC 0.00% Reduce -19.7% 60,868 $4.4M
Legal & General Group Plc 0.00% Reduce -5.3% 59,120 $4.3M
Ameriprise Financial Inc. 0.00% Reduce -6.2% 56,535 $4.1M
American Century Companies Inc. 0.00% Add +1.7% 55,234 $4.0M
FMR LLC 0.00% Add +40.3% 51,805 $3.8M
Swiss National Bank 0.00% No change 49,003 $3.6M
Intech Investment Management LLC 0.03% Reduce -12.8% 44,967 $3.3M
Atom Investors LP 0.21% Add +78.6% 40,771 $3.0M
Ieq Capital, LLC 0.01% Add +0.5% 39,960 $2.9M
BNP Paribas Financial Markets 0.00% Add +171.1% 37,967 $2.8M
Creative Planning 0.00% Reduce -15.8% 37,635 $2.7M
XTX Topco Ltd 0.05% Add +272.7% 36,292 $2.7M
PDT Partners, LLC 0.15% Reduce -19.4% 34,576 $2.5M
Edgestream Partners, L.P. 0.08% Reduce -26.3% 34,226 $2.5M
Marshall Wace, LLP 0.00% Add +263.3% 33,526 $2.4M
Franklin Resources Inc. 0.00% Add +17.4% 33,485 $2.4M
Y-Intercept (Hong Kong) Ltd 0.05% Add +35.3% 33,296 $2.4M
Penn Capital Management Company, LLC 0.19% New 33,286 $2.4M
Connors Investor Services Inc. 0.22% Add +1.8% 33,095 $2.4M
T. Rowe Price Associates Inc. 0.00% Add +12.1% 31,826 $2.3M
Ingalls & Snyder LLC 0.07% No change 28,927 $2.1M
State of New Jersey Common Pension Fund D 0.01% Reduce -6.9% 28,227 $2.1M
Alliancebernstein L.P. 0.00% Reduce -1.5% 26,509 $2.0M
California State Teachers Retirement System 0.00% Add +15.7% 27,529 $2.0M
Moran Wealth Management, LLC 0.06% Reduce -35.7% 27,031 $2.0M
Holocene Advisors, LP 0.00% Add +39.0% 26,473 $1.9M
Schonfeld Strategic Advisors LLC 0.02% Add +48.5% 26,250 $1.9M
Jump Financial, LLC 0.03% Add +17.5% 26,200 $1.9M
Dark Forest Capital Management LP 0.17% Reduce -42.4% 25,643 $1.9M
HSBC Holdings PLC 0.00% Add +70.8% 25,351 $1.9M
Prudential Financial Inc. 0.00% Add +7.7% 25,269 $1.8M
Huber Capital Management LLC 0.28% Add +11.5% 25,148 $1.8M
Voya Investment Management LLC 0.00% Reduce -0.7% 25,093 $1.8M
Brevan Howard Capital Management LP 0.02% Add +81.5% 24,436 $1.8M
CM Management, LLC 1.47% Add +20.0% 24,000 $1.8M
Citigroup Inc. 0.00% Add +34.3% 23,792 $1.7M
KLP Kapitalforvaltning As 0.01% Add +339.6% 23,300 $1.7M
Deutsche Bank AG 0.00% Add +15.7% 22,750 $1.7M
Cerity Partners LLC 0.00% Add +16.6% 22,513 $1.6M
Centiva Capital, LP 0.07% New 21,641 $1.6M
Wedge Capital Management L L P 0.03% Add +9.0% 21,473 $1.6M
Barclays PLC 0.00% Reduce -53.8% 21,189 $1.5M
Gsa Capital Partners LLP 0.10% Add +21.1% 21,100 $1.5M
Capital Fund Management S.A. 0.01% Reduce -4.8% 20,834 $1.5M
CANADA LIFE ASSURANCE Co 0.00% Reduce -4.6% 20,305 $1.5M
Entropy Technologies, LP 0.07% Add +33.3% 19,968 $1.5M
Mariner, LLC 0.00% Add +25.7% 19,710 $1.4M
Campbell & CO Investment Adviser LLC 0.08% New 18,751 $1.4M
Arrowstreet Capital, Limited Partnership 0.00% Add +196.5% 18,497 $1.4M
Aquatic Capital Management LLC 0.04% Add +88.3% 18,185 $1.3M
Wells Fargo & Company 0.00% Reduce -49.8% 17,626 $1.3M
Raymond James Financial Inc. 0.00% New 17,515 $1.3M
Richard Bernstein Advisors LLC 0.04% New 17,281 $1.3M
VANGUARD ASSET MANAGEMENT, Ltd 0.00% — 17,279 $1.3M
Thrivent Financial for Lutherans 0.00% Reduce -2.9% 16,539 $1.2M
Squarepoint Ops LLC 0.00% New 16,486 $1.2M
Capstone Investment Advisors, LLC 0.01% Add +38.8% 15,757 $1.2M
Summit Global Investments 0.06% New 14,430 $1.1M
Cwm, LLC 0.00% Add +37.1% 14,328 $1.0M
MetLife Investment Management, LLC 0.01% Reduce -0.9% 14,131 $1.0M
Illinois Municipal Retirement Fund 0.01% Add +8.6% 13,861 $1.0M
State of Alaska, Department of Revenue 0.01% Reduce -2.0% 13,465 $982K
State of Tennessee, Department of Treasury 0.00% Add +26.6% 12,867 $940K
First Trust Advisors LP 0.00% Add +3.6% 12,716 $929K
Quadrature Capital Ltd 0.01% Add +109.9% 12,500 $913K
Fifth Third Bancorp 0.00% Add +5303.5% 12,482 $911K
Round Hill Asset Management 0.57% No change 11,974 $874K
Linden Thomas Advisory Services, LLC 0.08% Add +4.0% 11,810 $862K
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% Add +0.8% 11,642 $850K
Jacobs Levy Equity Management, Inc. 0.00% No change 11,622 $849K
Manufacturers Life Insurance Company, The 0.00% Reduce -3.4% 11,203 $818K
Louisiana State Employees Retirement System 0.01% Reduce -3.5% 11,000 $803K
Freestone Grove Partners LP 0.01% Reduce -22.0% 10,511 $768K
Susquehanna International Group, LLP 0.00% Add +71.3% 10,492 $766K
Mirabella Financial Services LLP 0.08% New 10,359 $756K
EntryPoint Capital, LLC 0.21% Reduce -6.5% 9,993 $730K
Horizon Investments, LLC 0.01% New 9,956 $727K
Vanguard Global Advisers, LLC 0.00% — 9,793 $715K
New York State Common Retirement Fund 0.00% No change 8,911 $651K
Amundi 0.00% Add +71.0% 8,875 $648K
Quantbot Technologies LP 0.03% Add +114.0% 8,780 $641K
New York State Teachers Retirement System 0.00% Add +8.7% 8,651 $632K
NewEdge Advisors, LLC 0.00% Add +32.5% 8,625 $630K
Mercer Global Advisors Inc. 0.00% Add +11.5% 8,404 $614K
Hudson Edge Investment Partners Inc. 0.09% Add +94.0% 8,373 $611K
Man Group plc 0.00% Add +41.5% 8,092 $591K
Wealth Enhancement Advisory Services, LLC 0.00% Reduce -14.4% 7,897 $583K
Vanguard Investments Australia, Ltd. 0.00% — 7,935 $579K
Gotham Asset Management 0.00% New 7,674 $560K
Amalgamated Bank 0.00% Reduce -1.1% 7,135 $521K
Inspire Investing, LLC 0.03% Add +15.6% 7,033 $514K
Police & Firemen's Retirement System of New Jersey 0.00% No change 6,951 $508K
Arizona State Retirement System 0.00% Reduce -1.2% 6,805 $497K
Axq Capital, LP 0.06% New 6,784 $495K
State Board of Administration of Florida Retirement System 0.00% No change 6,727 $491K
Guggenheim Capital LLC 0.00% Add +18.8% 6,641 $485K
Yousif Capital Management, LLC 0.01% Reduce -1.4% 6,619 $483K
Aigen Investment Management, LP 0.12% Add +121.1% 6,589 $481K
Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% Reduce -32.2% 6,419 $469K
Teachers Retirement System of the State of Kentucky 0.00% No change 6,230 $455K
Commonwealth of Pennsylvania Public School Empls Retrmt SYS 0.00% Reduce -0.1% 6,127 $447K
Ethic Inc. 0.01% Add +13.8% 6,091 $445K
Bridgewater Associates 0.00% New 5,950 $434K
Oregon Public Employees Retirement Fund 0.01% No change 5,631 $411K
Quantinno Capital Management LP 0.00% Reduce -23.2% 5,606 $409K
Keybank National Association 0.00% Reduce -7.0% 5,583 $408K
Diversified Trust Co. 0.01% Add +40.7% 5,378 $393K
Cetera Investment Advisers 0.00% Add +9.4% 5,315 $388K
Bell & Brown Wealth Advisors, LLC 0.12% No change 4,966 $363K
LPL Financial LLC 0.00% Reduce -3.3% 4,910 $358K
Caxton Associates LLP 0.01% New 4,726 $345K
Pictet Asset Management Holding SA 0.00% Add +16.2% 4,708 $344K
Bailard, Inc. 0.01% New 4,700 $343K
Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% New 4,527 $331K
R Squared Ltd 0.17% Reduce -25.8% 4,363 $319K
Polymer Capital Management (US) LLC 0.05% Add +23.4% 4,269 $312K
Envestnet Asset Management Inc. 0.00% Add +13.5% 3,928 $287K
iSAM Funds (UK) Ltd 0.14% New 3,922 $286K
State of Wyoming 0.03% Add +79.2% 3,918 $286K
Indivisible Partners 0.03% New 3,868 $282K
Tidal Investments LLC 0.00% Add +36.0% 3,853 $281K
Tudor Investment Corporation 0.00% New 3,784 $276K
MQS Management LLC 0.18% New 3,662 $267K
Maryland State Retirement & Pension System 0.01% No change 3,612 $264K
Captrust Financial Advisors 0.00% Add +7.1% 3,600 $263K
Headlands Technologies LLC 0.03% New 3,519 $257K
DRW Securities, LLC 0.01% New 3,229 $236K
James Investment Research, Inc. 0.02% Reduce -69.7% 3,015 $220K
Public Employees Retirement Association of Colorado 0.00% No change 3,018 $220K
Virtu Financial LLC 0.01% New 2,885 $211K
Aster Capital Management (DIFC) Ltd 0.05% Add +2195.8% 1,630 $154K
Ameritas Investment Partners, Inc. 0.00% No change 2,099 $153K
Tower Research Capital LLC (TRC) 0.00% Reduce -18.4% 1,902 $139K
Nisa Investment Advisors, LLC 0.00% Reduce -1.8% 1,900 $139K
MAI Capital Management 0.00% Add +64.8% 1,576 $115K
Smartleaf Asset Management LLC 0.00% Reduce -26.2% 1,229 $90K
Ensign Peak Advisors, Inc 0.00% No change 1,209 $88K
Jones Financial Companies LLLP 0.00% Add +366.5% 1,115 $81K
PNC Financial Services Group, Inc. 0.00% Reduce -54.3% 1,079 $79K
Murphy & Mullick Capital Management Corp 0.05% No change 962 $70K
Allworth Financial LP 0.00% Add +5.7% 930 $68K
HM Payson & Co. 0.00% No change 909 $66K
KBC Group NV 0.00% No change 860 $63K
Eurizon Capital SGR S.p.A. 0.00% No change 804 $59K
Signaturefd, LLC 0.00% Reduce -18.6% 808 $59K
Sterling Capital Management LLC 0.00% Reduce -42.3% 789 $58K
Royal Bank of Canada 0.00% Reduce -82.2% 745 $55K
EverSource Wealth Advisors, LLC 0.00% Add +5.1% 718 $52K
Pinnacle Wealth Planning Services, Inc. 0.01% Add +187.4% 707 $52K
Public Employees Retirement System of Ohio 0.00% Reduce -96.6% 687 $50K
BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.00% Add +34.8% 616 $45K
DekaBank Deutsche Girozentrale 0.00% No change 515 $38K
GAMMA Investing LLC 0.00% Add +353.5% 517 $38K
Meeder Asset Management Inc. 0.00% Reduce -87.2% 438 $32K
Hantz Financial Services, Inc. 0.00% Reduce -27.0% 420 $31K
CDKV Holdings LLC 0.03% No change 400 $29K
Nomura Asset Management Co. Ltd. 0.00% New 370 $27K
Tsfg, LLC 0.00% No change 370 $27K
Versant Capital Management, Inc 0.00% Reduce -23.3% 332 $24K
Quarry LP 0.00% Add +70.0% 323 $24K
Arax Advisory Partners 0.00% Add +170.5% 303 $22K
Rockefeller Capital Management L.P. 0.00% Reduce -59.2% 297 $22K
Osaic Holdings, Inc. 0.00% Reduce -8.9% 297 $22K
Vanguard National Trust Co 0.00% — 290 $21K
Essential Partners LLC 0.01% Reduce -49.7% 240 $18K
Covestor Ltd 0.01% Reduce -48.8% 236 $17K
Crews Bank & Trust 0.00% No change 200 $15K
Rothschild Investment LLC 0.00% Add +20.5% 182 $13K
Farther Finance Advisors, LLC 0.00% Reduce -8.2% 179 $13K
Zions Bancorporation, National Association 0.00% Reduce -0.6% 177 $13K
Parallel Advisors, LLC 0.00% Reduce -38.7% 168 $12K
Root Financial Partners, LLC 0.00% Add +320.5% 164 $12K
Barrow Hanley Mewhinney & Strauss LLC 0.00% No change 157 $11K
Harbor Capital Advisors, Inc. 0.00% Add +54.6% 133 $10K
US Bancorp \de 0.00% Reduce -40.0% 135 $10K
Kilter Group LLC 0.00% Add +562.5% 106 $8K
IFP Advisors, Inc 0.00% Reduce -24.8% 106 $8K
STRS Ohio 0.00% No change 100 $7K
Bessemer Group Inc. 0.00% Add +47.9% 105 $7K
Basecamp Wealth Advisors LLC 0.00% Add +111.6% 91 $7K
Advisory Services Network, LLC 0.00% New 88 $6K
Private Wealth Asset Management, LLC 0.00% No change 63 $5K
UMB Bank, n.a. 0.00% Reduce -74.1% 57 $4K
True Wealth Design, LLC 0.00% Add +47.4% 56 $4K
Quadrant Capital Group LLC 0.00% Reduce -79.9% 53 $4K
SJS Investment Consulting Inc. 0.00% Add +275.0% 45 $3K
Mitsubishi UFJ Asset Management Co., Ltd. 0.00% No change 42 $3K
Cedar Mountain Advisors, LLC 0.00% New 39 $3K
Optiver Holding B.V. 0.00% New 30 $2K
MassMutual Private Wealth & Trust, FSB 0.00% Reduce -75.8% 29 $2K
CVA Family Office, LLC 0.00% New 28 $2K
High Note Wealth, LLC 0.00% New 26 $2K
Larson Financial Group LLC 0.00% New 24 $2K
Fortitude Family Office, LLC 0.00% Add +400.0% 20 $1K
JFS Wealth Advisors, LLC 0.00% Add +260.0% 18 $1K
Farmers & Merchants Investments Inc. 0.00% No change 18 $1K
Bare Financial Services, Inc 0.00% New 17 $1K
Keating Financial Advisory Services, Inc. 0.00% Add +900.0% 10 $730
First Horizon Corp. 0.00% No change 9 $657
Harbour Investments, Inc. 0.00% No change 8 $584
DiNuzzo Private Wealth, Inc. 0.00% Add +400.0% 5 $366
WPG Advisers, LLC 0.00% Reduce -50.0% 5 $365
Gilpin Wealth Management, LLC 0.00% New 4 $293
Ankerstar Wealth, LLC 0.00% New 4 $292
Rialto Wealth Management, LLC 0.00% Add +200.0% 3 $220
Abound Wealth Management 0.00% No change 2 $147
HFM Investment Advisors, LLC 0.00% Add +100.0% 2 $146
Vermillion Wealth Management, Inc. 0.00% New 1 $73
Bay Harbor Wealth Management, LLC 0.00% No change 1 $73
SBI Securities Co., Ltd. 0.00% No change 1 $73

"% of holder's portfolio" is IOSP's weight in each manager's 13F, not the share of Innospec Inc. the manager owns.