IOSP · Insider trading · 13F holders · Congress trades
Innospec Inc (IOSP)
Who is buying and selling IOSP: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 6
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
IOSP at a glance
- No open-market insider purchases or sales of IOSP were filed in the last 90 days.
- 6 13F filers hold IOSP among their 50 largest positions, worth $66.7M combined. The biggest bets by portfolio weight are Western Standard LLC (6.5%), First Wilshire Securities Management Inc (2.5%) and CM Management, LLC (1.7%). In their latest 13Fs, 0 managers opened a new position and 2 added to one.
- No member of Congress has disclosed a trade in IOSP.
IOSP insider trading
No open-market insider purchases or sales of IOSP were filed in the last 90 days.
Who owns IOSP? Hedge funds and superinvestors
6 13F filers hold IOSP among their 50 largest positions, worth $66.7M combined. The biggest bets by portfolio weight are Western Standard LLC (6.5%), First Wilshire Securities Management Inc (2.5%) and CM Management, LLC (1.7%). In their latest 13Fs, 0 managers opened a new position and 2 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Gendell Jeffrey LInvestment manager | 0.2% | $26.4M | 324,504 | +10.2% shares | Q2 2026 |
| Western Standard LLCHedge fund | 6.5% | $19.3M | 236,833 | +4.4% shares | Q2 2026 |
| First Wilshire Securities Management IncWealth manager | 2.5% | $12.0M | 147,112 | -0.6% shares | Q2 2026 |
| Numerai GP LLCHedge fund | 0.4% | $5.4M | 66,931 | -12.6% shares | Q2 2026 |
| CM Management, LLCHedge fund | 1.7% | $2.6M | 32,000 | +33.3% shares | Q2 2026 |
| Round Hill Asset ManagementWealth manager | 0.6% | $975K | 11,974 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 6). Screen IOSP in the grand portfolio →
IOSP stock trades by members of Congress
No member of Congress has disclosed a trade in IOSP.
IOSP questions and answers
Are insiders buying IOSP stock?
No open-market insider purchases or sales of IOSP were filed in the last 90 days.
Which hedge funds own IOSP?
6 13F filers hold IOSP among their 50 largest positions, worth $66.7M combined. The biggest bets by portfolio weight are Western Standard LLC (6.5%), First Wilshire Securities Management Inc (2.5%) and CM Management, LLC (1.7%). In their latest 13Fs, 0 managers opened a new position and 2 added to one.
Has Congress traded IOSP?
No member of Congress has disclosed a trade in IOSP.
Who is the largest holder of IOSP?
Among 13F filers, Gendell Jeffrey L reports the largest IOSP position, $26.4M (324,504 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Western Standard LLC's: 6.5% of its portfolio.
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