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Innospec IOSP

US equityMarket cap rank #2652Specialty Chemicals
$97.65 +$0.24 (+0.25%)
Pre-market · Oct 6, 4:10 am ET · After hours $97.65 0.00%
Open$97.62
Prev close$97.41
Day range$96.72 – $98.60
Volume193.4K
Market cap$2.41B
P/E (TTM)19.9
Dividend yield1.83%

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership101.4%+0.18 pts vs. prior quarter
Institutions holding327-1 vs. prior quarter
Insider trades (recent)32 buys / 18 sellsNet buying
Short interest2.07% of floatDays to cover 3.4 · as of 15 Sep 2026
Short-sale volume share11.5%5-day average of daily volume

Short-sale volume as % of daily volume

9%12%14%17%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$1.40M (10 inflow days, 10 outflow days).

The five largest holders on file together own 43.6% of shares outstanding.

Largest holders

  • BlackRock17.79%
  • Allspring Global Investments, LLC7.68%
  • Vanguard Portfolio Management, LLC7.65%
  • Dimensional Fund Advisors5.30%
  • Vanguard Capital Management, LLC5.16%
  • State Street Global Advisors4.04%
  • Geode Capital Management, LLC2.71%
  • Victory Capital Management Inc.2.68%

By investor type

  • Mutual Fund84.31%
  • Hedge Fund11.02%
  • Public Company2.39%
  • Government Pension Fund1.48%
  • Insurance Company1.32%
  • Individual/Insider1.21%
  • Private Company0.85%
  • Government0.04%

Reported short interest has risen from 1.98% to 2.07% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 511,052 2.1% 3.4
31 Aug 2026 466,734 1.9% 2.8
14 Aug 2026 463,878 1.9% 2.4
31 Jul 2026 455,159 1.8% 3.0
15 Jul 2026 484,889 2.0% 3.7
30 Jun 2026 487,124 2.0% 2.0

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