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IOSP · Innospec Inc. · Shareholders & Ownership

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$98.66 -0.99 (-0.99%)
Market Cap
$2.45B
Shares
24.63M
Volume · Oct 22 21.27K Avg daily vol (3M) 200.97K

Every disclosed holder of IOSP in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns IOSP

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group Shares % Out
Institutional (13F) 24,963,980 101.35%
Insiders (Forms 3, 4, 5) 357,779 1.45%
13D/G-only blocks 0 0.00%
Remaining 690,712 -2.80%
Registered funds (N-PORT, not summed) 13,320,747 54.08%

Shares outstanding: 24,631,047, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of IOSP

# Holder Shares
1
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
4,381,323
1.1
iShares Core S&P Small-Cap ETF
Fund S000004313 · Registered fund · Jun 30, 2026
iShares Trust, not summed
1,484,268
1.2
iShares Russell 2000 ETF
Fund S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
653,783
1.3
iShares Russell 2000 Value ETF
Fund S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
236,176
1.4
iShares S&P Small-Cap 600 Value ETF
Fund S000004316 · Registered fund · Jun 30, 2026
iShares Trust, not summed
212,067
1.5
BlackRock Advantage Small Cap Core Fund
Fund S000039982 · Registered fund · May 29, 2026
BlackRock Funds, not summed
87,320
2
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,884,244
3
DIMENSIONAL FUND ADVISORS LP
13F CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,305,038
3.1
DIMENSIONAL FUND ADVISORS LP
13G CIK 354204 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
1,305,038
3.2
U.S. Targeted Value Portfolio
Fund S000000970 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
201,662
3.3
U.S. SMALL CAP VALUE PORTFOLIO
Fund S000000987 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
200,522
3.4
Dimensional U.S. Targeted Value ETF
Fund S000070901 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
161,183
3.5
Dimensional US Small Cap Value ETF
Fund S000075151 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
112,508
4
Allspring Global Investments Holdings, LLC
13G CIK 1890906 · Holding company · Sep 30, 2026
Rule 13d-1(b), qualified institution, not summed
1,161,421
4.1
Allspring Global Investments Holdings, LLC
13F CIK 1890906 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
1,892,471
4.2
Allspring Special Small Cap Value Fund
Fund S000029108 · Registered fund · Jun 30, 2026
ALLSPRING FUNDS TRUST, not summed
1,207,431
4.3
Allspring Special Global Small Cap Fund
Fund S000029113 · Registered fund · Jul 31, 2026
ALLSPRING FUNDS TRUST, not summed
32,450
5
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,108,107
6
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
996,027
6.1
State Street(R) SPDR(R) Portfolio S&P 600(TM) Small Cap ETF
Fund S000041317 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
226,547
6.2
State Street(R) SPDR(R) S & P 600(TM) Small Cap Value ETF
Fund S000006974 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
127,709
6.3
State Street(R) SPDR(R) US Small Cap Low Volatility Index ETF
Fund S000039795 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
8,948
6.4
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
7,595
6.5
State Street(R) SPDR(R) Portfolio S&P 1500(R) Composite Stock Market ETF
Fund S000006973 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
5,326
7
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
782,414
8
Nuveen, LLC
13F CIK 1871926 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
755,723
8.1
College Retirement Equities Fund - Total Global Stock Account
Fund S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
282,945
8.2
Nuveen Quant Small Cap Equity Fund
Fund S000005386 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
139,740
8.3
Nuveen Multi Cap Value Fund
Fund S000000605 · Registered fund · Jun 30, 2026
Nuveen Investment Trust, not summed
108,679
8.4
Nuveen Quant Small/Mid Cap Equity Fund
Fund S000054623 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
91,820
8.5
Nuveen Small Cap Blend Index Fund
Fund S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
31,838
9
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
666,589
10
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
662,210
10.1
Goldman Sachs Small Cap Value Insights Fund
Fund S000014929 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
91,304
10.2
Goldman Sachs Small Cap Equity Insights Fund
Fund S000009329 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
52,514
10.3
Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund
Fund S000009355 · Registered fund · Jun 30, 2026
Goldman Sachs Variable Insurance Trust, not summed
15,415
10.4
Goldman Sachs Small Cap Growth Insights Fund
Fund S000014930 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
9,028
10.5
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
6,953
11
VICTORY CAPITAL MANAGEMENT INC
13F CIK 1040188 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
660,110
11.1
Victory Sycamore Small Company Opportunity Fund
Fund S000000800 · Registered fund · Jun 30, 2026
Victory Portfolios, not summed
490,000
11.2
Victory Extended Market Index Fund
Fund S000012941 · Registered fund · Jul 31, 2026
Victory Portfolios III, not summed
2,801
12
TWO SIGMA INVESTMENTS, LP
13F CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
568,709
13
VANGUARD SMALL-CAP INDEX FUND
Fund S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
564,509
14
AQR CAPITAL MANAGEMENT LLC
13F CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
482,545
14.1
AQR Small Cap Multi-Style Fund
Fund S000040064 · Registered fund · Jun 30, 2026
AQR Funds, not summed
4,611
15
BROWN ADVISORY INC
13F CIK 1345929 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
408,468
15.1
Brown Advisory Small-Cap Fundamental Value Fund
Fund S000038484 · Registered fund · Jun 30, 2026
Brown Advisory Funds, not summed
218,227
16
JPMORGAN CHASE & CO
13F CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
370,574
17
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
357,834
18
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
355,658
18.1
Schwab U.S. Small-Cap ETF
Fund S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
118,809
18.2
Schwab Fundamental U.S. Small Company ETF
Fund S000040878 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
105,322
18.3
Schwab Small-Cap Index Fund
Fund S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
61,215
18.4
Schwab Fundamental U.S. Small Company Index Fund
Fund S000016767 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
26,821
18.5
Schwab Total Stock Market Index Fund
Fund S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
14,629
19
WASATCH ADVISORS LP
13F CIK 814133 · Registered investment adviser · Sep 30, 2026
335,398
20
GENDELL JEFFREY L
13F CIK 1056581 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
324,504
21
Assenagon Asset Management S.A.
13F CIK 1546007 · Unknown · Sep 30, 2026
319,633
22
ROYCE & ASSOCIATES LP
13F CIK 906304 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
308,726
22.1
Royce Small-Cap Fund
Fund S000009507 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
94,266
22.2
Royce Premier Fund
Fund S000009505 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
72,524
22.3
Royce Small-Cap Special Equity Fund
Fund S000009513 · Registered fund · Jun 30, 2026
ROYCE FUND, not summed
21,000
23
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
303,044
23.1
Small Cap Value Fund
Fund S000001246 · Registered fund · Jun 30, 2026
Northern Funds, not summed
23,995
23.2
Small Cap Index Fund
Fund S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
12,775
23.3
Small Cap Core Fund
Fund S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
2,941
23.4
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
1,458
24
Brighthouse Small Cap Value Portfolio
Fund S000011105 · Registered fund · Jun 30, 2026
Brighthouse Funds Trust I, not summed
288,354
25
Qube Research & Technologies Ltd
13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
285,849
26
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
282,511
27
ACADIAN ASSET MANAGEMENT LLC
13F CIK 916542 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
273,999
28
Western Standard LLC
13F CIK 1517666 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
236,833
29
BANK OF AMERICA CORP /DE/
13F CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
235,742
30
Williams Patrick
Insider CIK 1338883 · Feb 27, 2026
Director, issuer-wide
231,535
31
MORGAN STANLEY
13F CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
230,793
31.1
E*TRADE No Fee Total Market Index Fund
Fund S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
4
32
RENAISSANCE TECHNOLOGIES LLC
13F CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
185,000
33
PANAGORA ASSET MANAGEMENT INC
13F CIK 883677 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
182,538
34
VANGUARD TAX-MANAGED SMALL-CAP FUND
Fund S000004387 · Registered fund · Jun 30, 2026
VANGUARD TAX-MANAGED FUNDS, not summed
166,911
35
D. E. Shaw & Co., Inc.
13F CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
165,746
36
VANGUARD FIDUCIARY TRUST CO
13F CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
163,715
37
SEI INVESTMENTS CO
13F CIK 350894 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
156,051
37.1
SIIT EXTENDED MARKET INDEX FUND
Fund S000035814 · Registered fund · May 31, 2026
SEI INSTITUTIONAL INVESTMENTS TRUST, not summed
3,813
37.2
SIIT SMALL CAP II FUND
Fund S000036633 · Registered fund · May 31, 2026
SEI INSTITUTIONAL INVESTMENTS TRUST, not summed
2,158
37.3
Catholic Values Equity Fund
Fund S000048320 · Registered fund · May 31, 2026
SEI CATHOLIC VALUES TRUST, not summed
1,185
37.4
New Covenant Growth Fund
Fund S000024941 · Registered fund · Jun 30, 2026
NEW COVENANT FUNDS, not summed
499
38
UBS Group AG
13F CIK 1610520 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
154,001
39
FIRST WILSHIRE SECURITIES MANAGEMENT INC
13F CIK 732847 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
147,112
40
MACKENZIE FINANCIAL CORP
13F CIK 919859 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
144,677
41
VANGUARD DIVIDEND APPRECIATION INDEX FUND
Fund S000011322 · Registered fund · Jul 31, 2026
VANGUARD SPECIALIZED FUNDS, not summed
139,314
42
Bank of New York Mellon Corp
13F CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
137,261
43
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC
13F CIK 1164833 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
135,740
43.1
Hotchkis and Wiley Small Cap Diversified Value Fund
Fund S000045868 · Registered fund · Jun 30, 2026
HOTCHKIS & WILEY FUNDS/DE/, not summed
37,500
43.2
Hotchkis & Wiley SMID Cap Diversified Value Fund
Fund S000091359 · Registered fund · Jun 30, 2026
HOTCHKIS & WILEY FUNDS/DE/, not summed
104
44
Jupiter Topco LLC
13F CIK 2146052 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
127,976
44.1
Janus Henderson Small Cap Value Fund
Fund S000010480 · Registered fund · Jun 30, 2026
Janus Investment Fund, not summed
105,607
45
VANGUARD RUSSELL 2000 INDEX FUND
Fund S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
127,602
46
Leeward Investments, LLC - MA
13F CIK 1923173 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
125,308
47
PRINCIPAL FINANCIAL GROUP INC
13F CIK 1126328 · Insurance company · Jun 30, 2026
carried, not yet filed for the newest quarter
119,053
47.1
SmallCap Value Fund II
Fund S000007169 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
21,905
47.2
SmallCap S&P 600 Index Fund
Fund S000007203 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
18,147
48
Russell Investments Group, Ltd.
13F CIK 1692234 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
118,614
48.1
U.S. Small Cap Equity Fund
Fund S000001586 · Registered fund · Jul 31, 2026
RUSSELL INVESTMENT CO, not summed
33,680
48.2
U.S. Small Cap Equity Fund
Fund S000006864 · Registered fund · Jun 30, 2026
RUSSELL INVESTMENT FUNDS, not summed
8,050
48.3
Tax-Managed U.S. Mid & Small Cap Fund
Fund S000001571 · Registered fund · Jul 31, 2026
RUSSELL INVESTMENT CO, not summed
4,161
48.4
Russell Investments U.S. Small Cap Equity ETF
Fund S000089990 · Registered fund · Jun 30, 2026
Russell Investments Exchange Traded Funds, not summed
2,006
49
Invesco Ltd.
13F CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
118,427
49.1
Invesco S&P SmallCap 600 Revenue ETF
Fund S000064596 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
28,374
49.2
Invesco RAFI US 1500 Small-Mid ETF
Fund S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
26,371
49.3
Invesco S&P SmallCap Low Volatility ETF
Fund S000030965 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
25,502
49.4
Invesco S&P SmallCap Materials ETF
Fund S000028302 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
6,838
49.5
Invesco S&P SmallCap High Dividend Low Volatility ETF
Fund S000055539 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
6,261
50
ZWJ INVESTMENT COUNSEL INC
13F CIK 842782 · Registered investment adviser · Sep 30, 2026
114,933

48 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 415 holders

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Key facts CIK 1054905 CUSIP 45768S105 13F (30d) 35 filings 33 filers Visit website Investor relations