William Martin Dawson
CIK 1323140 · View on SEC EDGAR ↗
Insider
First SEC filing: May 4, 2005 · Latest: May 4, 2005
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 7 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
7 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 24, 2006 | IOSP | P | 1,017 | $21.98 | $22,354 | 1,629 Direct | +166.18% | Acquired | 750.3% (price as of 2026-08-21) |
| Nov. 18, 2005 | IOSP | P | 612 | $16.30 | $9,976 | 612 Direct | — | Acquired | 1046.6% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Nov. 29, 2007 | IOSP | Options | Common Stock (2,760) | $9.88 | Feb. 28, 2015 | 2,760 | Disposed |
| Nov. 28, 2007 | IOSP | Options | Common Stock (2,560) | $9.96 | Feb. 13, 2016 | 2,560 | Disposed |
| Feb. 28, 2006 | IOSP | OPTIONS | COMMON STOCK (509) | $0.00 | Feb. 28, 2016 | 509 | Acquired |
| Feb. 13, 2006 | IOSP | OPTIONS | COMMON STOCK (1,280) | $19.93 | Feb. 13, 2016 | 1,280 | Acquired |
| Feb. 13, 2006 | IOSP | OPTIONS | COMMON STOCK (3,840) | $0.00 | Feb. 13, 2016 | 3,840 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.