| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Counted by filing, the last 12 months brought 1 open-market purchase by 1 insider worth about $25K and 8 sales by 6 insiders worth about $574K. The 12 months before that brought no open-market purchases and 12 sales by 9 insiders worth about $1.8M.
None of the 8 sales in the last 12 months was marked as made under a Rule 10b5-1 trading plan.
The largest open-market purchase in the last two years was 340 shares by Leslie J Parrette (Director) at an average $74.09 on November 14, 2025, about $25K. Three months later IOSP was up 17%.
| Role | Insider | Shares | Value | 30d |
|---|---|---|---|---|
| CEO | 231.5K | $19.65M | - | |
| CFO | 20.4K | $1.73M | - | |
| VP | 14.7K | $1.25M | - | |
| VP | 13.1K | $1.11M | - | |
| Dir | 10.5K | $893.6K | - |
Buys and sells only
| Date | Insider | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 3, 2026 | David B. Jones53 | SVP, GC & CCO | Sell | 1,028 | $75.64 | $77,757.92 | -6.5% | +7.3% | - | |
| Feb 27, 2026 | Ian Cleminson63 | EVP & CFO | Sell | 2,380 | $76.56 | $182,212.80 | -10.5% | +7.5% | - | |
| Feb 27, 2026 | Milton C Blackmore57 | Director | Sell | 594 | $76.56 | $45,474.38 | -5.3% | +7.5% | - | |
| Feb 27, 2026 | Larry Padfield47 | Director | Sell | 594 | $76.56 | $45,474.38 | -5.9% | +7.5% | - | |
| Feb 27, 2026 | Claudia Poccia | Director | Sell | 119 | $76.56 | $9,110.19 | -1.8% | +7.5% | - | |
| Feb 27, 2026 | David Landless54 | Director | Sell | 594 | $76.56 | $45,474.38 | -7.2% | +7.5% | - | |
| Feb 20, 2026 | Milton C Blackmore57 | Director | Sale+OE | 1,030 | $81.84 | $84,296.13 | -9.7% | -3.1% | - | |
| Feb 20, 2026 | Larry Padfield47 | Director | Sale+OE | 1,030 | $81.84 | $84,296.13 | -10.8% | -3.1% | - | |
| Nov 14, 2025 | Leslie J Parrette56 | Director | Buy | 340 | $74.09 | $25,190.60 | +6.2% | +17.3% | - | |
| May 13, 2025 | Leslie J Parrette56 | Director | Sell | 446 | $90.63 | $40,420.74 | -7.5% | -10.3% | - |