Innospec IOSP Institutional Ownership

NASDAQ IOSP

$99.13 -0.51 (-0.51%)

As of: Oct 22, 2026 · 1:32 PM EDT

Institutions by Trading Activity

278 Institutions

Increased 144 51.8%

Unchanged 37 13.3%

Reduced 97 34.9%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

99.77%

Shares Held by Institutions

24.59Mn

of 24.64Mn outstanding

▼-1.40% QoQ

Shares Outstanding

24.64Mn

56.35K held outside 13F filers

Institutional Investors

278

filed 13F for Jun 2026

▲+12 vs prior quarter

Net Shares Added (QoQ)

-349.66K

distributed since last quarter

Value of Holdings

$2.44Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Innospec Inc. (NASDAQ:IOSP) counted 278 institutional investors among its 13F-reported shareholders for the quarter ended June 30, 2026.

In Q2 2026, these holders reported 99.77% of Innospec's outstanding shares.
Total shares held in Innospec fell 1.40% versus Q1 2026, while the number of holders rose 6.92% versus Q2 2025.
Of the 278 holders, 144 added to their positions, 97 reduced their stakes and 37 left their positions unchanged in Q2 2026.
Altogether, institutional holders owned 24.59Mn IOSP shares at the end of Q2 2026, down 349.65K from the prior quarter and up 905.96K from a year earlier.
As of June 30, 2026, BlackRock, Inc. held the largest stake in Innospec with 4.38Mn shares, or 17.78% of shares outstanding.
Holders that added the most shares of Innospec in Q2 2026 were BlackRock, Inc. (+502.35K shares), AQR Capital Management LLC (+170.48K shares), Goldman Sachs Group Inc (+170.2K shares), Acadian Asset Management LLC (+151.45K shares) and Nuveen, LLC (+112.47K shares).
On the other side, among holders that kept a position in Innospec, the largest reductions in Q2 2026 came from Allspring Global Investments Holdings, LLC (-423.47K shares), UBS Group AG (-411.91K shares), Assenagon Asset Management S.A. (-218.1K shares), Victory Capital Management Inc (-204.88K shares) and Point72 Asset Management, L.P. (-124.15K shares).
Business Quant data shows the 10 biggest positions in Innospec as of Q2 2026 were held by BlackRock, Inc. (4.38Mn shares), Allspring Global Investments Holdings, LLC (1.89Mn shares), Vanguard Portfolio Management LLC (1.88Mn shares), Dimensional Fund Advisors LP (1.31Mn shares), Vanguard Capital Management LLC (1.11Mn shares), State Street Corp (996.03K shares), Nuveen, LLC (755.72K shares), Geode Capital Management, LLC (666.59K shares), Goldman Sachs Group Inc (662.21K shares) and Victory Capital Management Inc (660.11K shares).

Form 13F Holdings

278 Institutional Holders

Report period 30 Jun, 2026

Total shares held 24.59Mn

Of outstanding 99.77%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	4,381,323	17.78%	▲502,348	+12.95%	$356.60Mn
2	Allspring Global Investments Holdings, LLC	0001890906	1,892,471	7.68%	▼423,471	-18.29%	$154.75Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,884,244	7.65%	▲24,153	+1.30%	$153.36Mn
4	DIMENSIONAL FUND ADVISORS LP	0000354204	1,305,038	5.30%	▲62,949	+5.07%	$106.22Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,108,107	4.50%	▼6,491	-0.58%	$90.19Mn
6	State Street Corp	0000093751	996,027	4.04%	▲31,692	+3.29%	$81.07Mn
7	Nuveen, LLC	0001871926	755,723	3.07%	▲112,475	+17.49%	$61.51Mn
8	GEODE CAPITAL MANAGEMENT, LLC	0001214717	666,589	2.70%	▲35,997	+5.71%	$54.26Mn
9	Goldman Sachs Group Inc	0000886982	662,210	2.69%	▲170,199	+34.59%	$53.90Mn
10	VICTORY CAPITAL MANAGEMENT INC	0001040188	660,110	2.68%	▼204,884	-23.69%	$53.73Mn
11	TWO SIGMA INVESTMENTS, LP	0001179392	568,709	2.31%	▼24,330	-4.10%	$46.29Mn
12	AQR CAPITAL MANAGEMENT LLC	0001167557	482,545	1.96%	▲170,480	+54.63%	$39.27Mn
13	BROWN ADVISORY INC	0001345929	408,468	1.66%	▲112,003	+37.78%	$33.25Mn
14	Jpmorgan Chase & Co	0000019617	370,574	1.50%	▼55,476	-13.02%	$30.00Mn
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	355,658	1.44%	▼10,216	-2.79%	$28.95Mn
16	GENDELL JEFFREY L	0001056581	324,504	1.32%	▲30,000	+10.19%	$26.41Mn
17	ROYCE & ASSOCIATES LP	0000906304	308,726	1.25%	▲47,390	+18.13%	$25.13Mn
18	Northern Trust Corp	0000073124	303,044	1.23%	▲18,805	+6.62%	$24.66Mn
19	Qube Research & Technologies Ltd	0001729829	285,849	1.16%	▼120,775	-29.70%	$23.27Mn
20	ACADIAN ASSET MANAGEMENT LLC	0000916542	273,999	1.11%	▲151,447	+123.58%	$22.29K

Showing 1 to 20 of 278 holders