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Buy Day today: Neutral (55) Mixed market breadth · no major macro event
IOSP

Innospec Inc

Basic Materials · Specialty Chemicals

99.20$ -0.3% vs. previous close Closing price · As of: Nov 3, 2026

Ownership

Ownership Structure

Who owns Innospec Inc (IOSP)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.7% of the shares are freely tradable; institutional investors hold 104.7%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 104.7%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 1.3%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 98.7%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 2.8%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 25Mio.

Largest Shareholders

Institutions

Institutions IOSP
Name Stake (%) Shares Change (%) Date
BlackRock Inc 17.79 4,381,323 +13.0 06/30/2026
Allspring Global Investments Holdings, LLC 7.68 1,892,471 -18.3 06/30/2026
Vanguard Portfolio Management, LLC 7.65 1,884,244 +1.3 06/30/2026
Dimensional Fund Advisors, Inc. 5.30 1,305,038 +5.1 06/30/2026
Vanguard Capital Management, LLC 4.50 1,108,107 -0.6 06/30/2026
State Street Corp 4.04 996,027 +3.3 06/30/2026
Nuveen, LLC 3.07 755,723 +17.5 06/30/2026

Funds

Funds IOSP
Name Stake (%) Shares Change (%) Date
iShares Core S&P Small-Cap ETF 5.95 1,466,287 +0.0 09/30/2026
Vanguard MStar Total Stk Mkt Idx Invest 3.20 788,753 +0.5 09/30/2026
Allspring Special Small Cap Value A 2.92 720,087 -20.5 09/30/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Data as of: November 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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