Who owns IOSP?
Institutional ownership of Innospec Inc. from Form 13F, Q2 2026
282 institutional managers reported holding Innospec Inc. (IOSP) in Form 13F filings for Q2 2026, with 24,868,191 shares worth $2.0B. The largest reported holder was BlackRock, Inc. Managers that filed both quarters cut a net 28,656 shares (-0.1%). 43 opened new positions and 27 sold out.
- Funds holding
- 282
- Value held
- $2.0B
- New / sold out
- 43 / 27
- Net shares, same filers
- -0.1%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of IOSP
Share of 13F holdings is each fund's shares as a share of the 24,868,191 IOSP shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- BlackRock, Inc. Added+$40.9M
- AQR Capital Management LLC Added+$13.9M
- Goldman Sachs Group Inc Added+$13.9M
- Acadian Asset Management LLC Added+$12.3M
- Mackenzie Financial Corp New+$11.8M
- Nuveen, LLC Added+$9.2M
- Brown Advisory Inc Added+$9.1M
- First Trust Advisors LP Added+$6.4M
- SG Capital Management LLC New+$5.8M
- Creative Planning Added+$5.4M
Biggest sellers in Q2 2026
- Allspring Global Investments Holdings, LLC Trimmed-$34.6M
- UBS Group AG Trimmed-$33.5M
- Victory Capital Management Inc Trimmed-$16.7M
- Point72 Asset Management, L.P. Trimmed-$10.1M
- Citadel Advisors LLC Trimmed-$10.0M
- D. E. Shaw & Co., Inc. Trimmed-$9.9M
- Qube Research & Technologies Ltd Trimmed-$9.8M
- Jane Street Group, LLC Sold out-$6.9M
- Voloridge Investment Management, LLC Trimmed-$6.2M
- Engineers Gate Manager LP Trimmed-$4.7M
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $207M and sold $207M; 102 added and 96 trimmed.
Schedule 13D and 13G filings on IOSP
Owners of more than 5% must file within days, so these can be newer than the 13F data.
- 2026-07-14DIMENSIONAL FUND ADVISORS LP SCHEDULE 13G filed by Innospec Inc.Schedule 13G
Questions about IOSP ownership
- Who owns IOSP stock?
- 282 institutional investment managers reported IOSP positions in their Form 13F filings for Q2 2026, holding 24,868,191 shares worth $2.0B in total. BlackRock, Inc. reported the largest position.
- Are funds buying or selling IOSP?
- In Q2 2026, 43 managers opened new IOSP positions, 102 added, 96 trimmed and 27 sold out. Managers that filed in both quarters sold a net 28,656 shares.
- How current is this IOSP institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to IOSP by CUSIP. Options are left out. IOSP news and filings · IOSP insider trades · Top funds