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IOSP

Innospec Inc.
$85.46 +2.44 (+2.94%) At close · Jul 16
Market Cap
$2.10B
Shares
24,631,047

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 267
Total Value: $1,673,211,809
Total Shares: 22,861,943
Showing 1–100 of 267 holdings by value · page 1 of 3

Institutional Ownership Trend

26 quarters

Superinvestors Holding IOSP

All superinvestors →
Joel Greenblatt $560,355 Ray Dalio $434,469

Holder Concentration

Across 265 13F filers
Top Holder
16.8%
Jun 2023 → Mar 2026 · range 15.0% – 18.3%
of institutional value
Top 5
41.2%
Jun 2023 → Mar 2026 · range 41.2% – 52.1%
of institutional value
Top 10
55.5%
Jun 2023 → Mar 2026 · range 55.5% – 70.0%
of institutional value
HHI
535
Jun 2023 → Mar 2026 · range 535 – 751
Broadly held
Showing 100 of 267
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $283,242,746 16.93% 3,878,975
Large Allspring Global Investments Holdings, LLC $169,110,084 10.11% 2,315,942
Mega DIMENSIONAL FUND ADVISORS LP $90,697,336 5.42% 1,242,089
Mega VANGUARD CAPITAL MANAGEMENT LLC $81,387,945 4.86% 1,114,598
Mega STATE STREET CORP $70,415,741 4.21% 964,335
Mega VICTORY CAPITAL MANAGEMENT INC $63,161,861 3.77% 864,994
Mega Nuveen, LLC $46,969,968 2.81% 643,248
Mega GEODE CAPITAL MANAGEMENT, LLC $46,045,827 2.75% 630,592
Mega TWO SIGMA INVESTMENTS, LP $43,303,707 2.59% 593,039
Mega UBS Group AG $41,322,820 2.47% 565,911
Mega GOLDMAN SACHS GROUP INC $35,926,642 2.15% 492,011
Mega JPMORGAN CHASE & CO $31,110,168 1.86% 426,050
Large Qube Research & Technologies Ltd $29,691,684 1.77% 406,624
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $26,716,119 1.60% 365,874
Mega AQR CAPITAL MANAGEMENT LLC $22,786,983 1.36% 312,065
Large Assenagon Asset Management S.A. $22,201,726 1.33% 272,782
Large BROWN ADVISORY INC $21,647,873 1.29% 296,465
Mid GENDELL JEFFREY L $21,504,681 1.29% 294,504
Mega BANK OF AMERICA CORP /DE/ Bank $21,231,731 1.27% 290,766
Mega D. E. Shaw & Co., Inc. $20,941,697 1.25% 286,794
Mega NORTHERN TRUST CORP Bank $20,755,128 1.24% 284,239
Mid ROYCE & ASSOCIATES LP $19,082,754 1.14% 261,336
Mega MORGAN STANLEY $17,201,391 1.03% 235,571
Small Western Standard LLC $16,563,345 0.99% 226,833
Mega CITADEL ADVISORS LLC $16,128,876 0.96% 220,883
Large SEI INVESTMENTS CO $12,714,314 0.76% 174,121
Large Point72 Asset Management, L.P. $12,179,297 0.73% 166,794
Mega VANGUARD FIDUCIARY TRUST CO Bank $11,738,111 0.70% 160,752
Small FIRST WILSHIRE SECURITIES MANAGEMENT INC Broker-Dealer $10,812,217 0.65% 148,072
Mega JANUS HENDERSON GROUP PLC $9,731,520 0.58% 133,272
Mega Bank of New York Mellon Corp Bank $9,586,867 0.57% 131,291
Large HRT FINANCIAL LP $9,131,516 0.55% 125,055
Large ACADIAN ASSET MANAGEMENT LLC $8,948,747 0.53% 122,552
Mid ZWJ INVESTMENT COUNSEL INC $8,830,977 0.53% 108,502
Large HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC $8,821,546 0.53% 120,810
Mega PRINCIPAL FINANCIAL GROUP INC $8,797,230 0.53% 120,477
Large PANAGORA ASSET MANAGEMENT INC $8,738,668 0.52% 119,675
Large RENAISSANCE TECHNOLOGIES LLC $8,682,078 0.52% 118,900
Mega Invesco Ltd. $8,622,491 0.52% 118,084
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $7,883,458 0.47% 107,963
Large TEACHER RETIREMENT SYSTEM OF TEXAS Pension $7,528,508 0.45% 103,102
Mega JANE STREET GROUP, LLC $6,900,827 0.41% 94,506
Large ProShare Advisors LLC $6,560,189 0.39% 89,841
Large Public Sector Pension Investment Board Pension $6,476,435 0.39% 88,694
Mid MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC $6,386,548 0.38% 87,463
Large Trexquant Investment LP $5,722,577 0.34% 78,370
Small Numerai GP LLC $5,594,500 0.33% 76,616
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $5,435,823 0.32% 74,443
Large Russell Investments Group, Ltd. $5,228,740 0.31% 71,607
Mega RHUMBLINE ADVISERS $5,195,884 0.31% 71,157
Mid Leeward Investments, LLC - MA $5,097,526 0.30% 69,810
Mid DEPRINCE RACE & ZOLLO INC $4,967,477 0.30% 68,029
Mid Engineers Gate Manager LP $4,723,079 0.28% 64,682
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $4,503,070 0.27% 61,669
Mega MILLENNIUM MANAGEMENT LLC $4,485,399 0.27% 61,427
Large SG Americas Securities, LLC Broker-Dealer $4,444,581 0.27% 60,868
Mega Legal & General Group Plc $4,316,941 0.26% 59,120
Mega AMERIPRISE FINANCIAL INC $4,128,185 0.25% 56,535
Mega AMERICAN CENTURY COMPANIES INC $4,033,186 0.24% 55,234
Mega FMR LLC $3,782,800 0.23% 51,805
Mega Swiss National Bank Bank $3,578,199 0.21% 49,003
Mid INTECH INVESTMENT MANAGEMENT LLC $3,283,490 0.20% 44,967
Mid Atom Investors LP $2,977,098 0.18% 40,771
Large IEQ CAPITAL, LLC $2,917,879 0.17% 39,960
Mega BNP PARIBAS ARBITRAGE, SA $2,772,350 0.17% 37,967
Large Creative Planning $2,748,107 0.16% 37,635
Mid XTX Topco Ltd $2,650,041 0.16% 36,292
Mid PDT Partners, LLC $2,524,739 0.15% 34,576
Mid Edgestream Partners, L.P. $2,499,182 0.15% 34,226
Large MARSHALL WACE, LLP $2,448,067 0.15% 33,526
Mega FRANKLIN RESOURCES INC $2,445,073 0.15% 33,485
Mid Penn Capital Management Company, LLC $2,430,543 0.15% 33,286
Mid CONNORS INVESTOR SERVICES INC $2,416,596 0.14% 33,095
Mega PRICE T ROWE ASSOCIATES INC /MD/ $2,323,934 0.14% 31,826
Mid INGALLS & SNYDER LLC $2,112,249 0.13% 28,927
Large State of New Jersey Common Pension Fund D Pension $2,061,135 0.12% 28,227
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $2,010,167 0.12% 27,529
Mid Moran Wealth Management, LLC $1,973,803 0.12% 27,031
Mega ALLIANCEBERNSTEIN L.P. $1,935,687 0.12% 26,509
Large Holocene Advisors, LP $1,933,058 0.12% 26,473
Large Schonfeld Strategic Advisors LLC $1,916,775 0.11% 26,250
Mid Jump Financial, LLC $1,913,124 0.11% 26,200
Mid DARK FOREST CAPITAL MANAGEMENT LP $1,872,451 0.11% 25,643
Mega HSBC HOLDINGS PLC $1,851,129 0.11% 25,351
Large PRUDENTIAL FINANCIAL INC $1,845,142 0.11% 25,269
Small Huber Capital Management LLC $1,836,306 0.11% 25,148
Large VOYA INVESTMENT MANAGEMENT LLC $1,832,290 0.11% 25,093
Mid Brevan Howard Capital Management LP $1,784,316 0.11% 24,436
Small CM Management, LLC $1,752,480 0.10% 24,000
Mega CITIGROUP INC $1,737,290 0.10% 23,792
Large KLP KAPITALFORVALTNING AS $1,701,366 0.10% 23,300
Mega DEUTSCHE BANK AG\ Bank $1,661,204 0.10% 22,750
Mid WEDGE CAPITAL MANAGEMENT L L P/NC $1,654,577 0.10% 20,329
Large Cerity Partners LLC $1,643,898 0.10% 22,513
Mid Linden Thomas Advisory Services, LLC $1,612,742 0.10% 19,815
Large Centiva Capital, LP $1,580,225 0.09% 21,641
Mega BARCLAYS PLC $1,547,220 0.09% 21,189
Mid GSA CAPITAL PARTNERS LLP $1,540,722 0.09% 21,100
Large CAPITAL FUND MANAGEMENT S.A. $1,521,298 0.09% 20,834
Large CANADA LIFE ASSURANCE Co Insurance $1,482,671 0.09% 20,305
Key facts CIK 1054905 CUSIP 45768S105 13F (30d) 22 filings 21 filers Visit website

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