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Who owns Innospec (IOSP) stock

270 funds reported Innospec (IOSP) shares in their latest 13F filings, worth $2.2B in all. The largest holder is BlackRock ($357M). Last quarter 130 funds added to their stakes and 114 cut them.

Largest holders of IOSP (13F)Largest holders of IOSP (13F)BlackRock$357MVanguard Group$239MAllspring Global Investments Hold…$155MVanguard Portfolio Management LLC$153MDimensional Fund Advisors LP$106MVanguard Capital Management LLC$90.2MState Street$81.1MNuveen, LLC$61.5MGeode Capital Management, LLC$54.3MGoldman Sachs Group$53.9M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock4,381,323$357Mincrease2026-06-30
Vanguard Group3,121,151$239Mdecrease2025-12-31
Allspring Global Investments Holdings, LLC1,892,471$155Mdecrease2026-06-30
Vanguard Portfolio Management LLC1,884,244$153Mincrease2026-06-30
Dimensional Fund Advisors LP1,305,038$106Mincrease2026-06-30
Vanguard Capital Management LLC1,108,107$90.2Mdecrease2026-06-30
State Street996,027$81.1Mincrease2026-06-30
Nuveen, LLC755,723$61.5Mincrease2026-06-30
Geode Capital Management, LLC666,589$54.3Mincrease2026-06-30
Goldman Sachs Group662,210$53.9Mincrease2026-06-30
Victory Capital Management660,110$53.7Mdecrease2026-06-30
Two Sigma Investments, LP568,709$46.3Mdecrease2026-06-30
AQR Capital Management LLC482,545$39.3Mincrease2026-06-30
Brown Advisory408,468$33.2Mincrease2026-06-30
Wasatch Advisors LP335,398$32.0Mnew2026-09-30

Innospec's latest quarter

Innospec, Q3 2026: revenue $474M (+7% year over year), operating margin 8.8%, net earnings $31.6M, operating cash flow $17.4M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most IOSP stock?

By the latest 13F filings: BlackRock ($357M); Vanguard Group ($239M); Allspring Global Investments Holdings, LLC ($155M); Vanguard Portfolio Management LLC ($153M); Dimensional Fund Advisors LP ($106M).

What is the short interest in IOSP?

483,179 shares were sold short at the 2026-10-15 settlement, -1.82% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.