David Earl Williams
Insider
First SEC filing: Sept. 25, 2009 · Latest: Sept. 25, 2009
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 24, 2018 | IOSP | M | 1,004 | $44.18 | $44,357 | 644 Direct | -60.92% | Disposed | 120.5% (price as of 2026-10-02) |
| May 24, 2018 | IOSP | M | 1,004 | $75.52 | $75,822 | 14,516 Direct | -6.47% | Disposed | 29.0% (price as of 2026-10-02) |
| May 24, 2018 | IOSP | M | 1,004 | $44.18 | $44,357 | 15,520 Direct | +6.92% | Acquired | 120.5% (price as of 2026-10-02) |
| Feb. 23, 2018 | IOSP | M | 982 | $43.95 | $43,159 | 7,102 Direct | -12.15% | Disposed | 121.6% (price as of 2026-10-02) |
| Feb. 23, 2018 | IOSP | M | 2,160 | · | · | 8,084 Direct | -21.09% | Disposed | (price as of 2026-10-02) |
| Feb. 23, 2018 | IOSP | S | 982 | $68.54 | $67,306 | 14,516 Direct | -6.34% | Disposed | 42.1% (price as of 2026-10-02) |
| Feb. 23, 2018 | IOSP | M | 982 | $43.95 | $43,159 | 15,498 Direct | +6.76% | Acquired | 121.6% (price as of 2026-10-02) |
| Feb. 23, 2018 | IOSP | S | 2,160 | $68.54 | $148,046 | 14,516 Direct | -12.95% | Disposed | 42.1% (price as of 2026-10-02) |
| Feb. 23, 2018 | IOSP | M | 2,160 | · | · | 16,676 Direct | +14.88% | Acquired | (price as of 2026-10-02) |
| Feb. 23, 2017 | IOSP | M | 277 | · | · | 10,784 Direct | -2.50% | Disposed | (price as of 2026-10-02) |
| Feb. 23, 2017 | IOSP | M | 730 | $46.03 | $33,602 | 11,061 Direct | -6.19% | Disposed | 111.6% (price as of 2026-10-02) |
| Feb. 23, 2017 | IOSP | M | 1,505 | · | · | 11,971 Direct | -11.17% | Disposed | (price as of 2026-10-02) |
| Feb. 23, 2017 | IOSP | S | 277 | $67.92 | $18,814 | 14,516 Direct | -1.87% | Disposed | 43.4% (price as of 2026-10-02) |
| Feb. 23, 2017 | IOSP | M | 277 | · | · | 14,793 Direct | +1.91% | Acquired | (price as of 2026-10-02) |
| Feb. 23, 2017 | IOSP | S | 730 | $67.92 | $49,582 | 14,516 Direct | -4.79% | Disposed | 43.4% (price as of 2026-10-02) |
| Feb. 23, 2017 | IOSP | M | 730 | $46.03 | $33,602 | 15,246 Direct | +5.03% | Acquired | 111.6% (price as of 2026-10-02) |
| Feb. 23, 2017 | IOSP | S | 1,505 | $67.92 | $102,220 | 14,516 Direct | -9.39% | Disposed | 43.4% (price as of 2026-10-02) |
| Feb. 23, 2017 | IOSP | M | 1,505 | · | · | 16,021 Direct | +10.37% | Acquired | (price as of 2026-10-02) |
| Feb. 21, 2017 | IOSP | A | 644 | $70.60 | $45,466 | 14,001 Direct | +4.82% | Acquired | 38.0% (price as of 2026-10-02) |
| Feb. 21, 2017 | IOSP | A | 2,897 | · | · | 13,357 Direct | +27.70% | Acquired | (price as of 2026-10-02) |
| Feb. 22, 2016 | IOSP | A | 2,760 | · | · | 10,360 Direct | +36.32% | Acquired | (price as of 2026-10-02) |
| Feb. 22, 2016 | IOSP | A | 1,004 | $44.18 | $44,357 | 7,600 Direct | +15.22% | Acquired | 120.5% (price as of 2026-10-02) |
| March 10, 2015 | IOSP | M | 1,380 | $29.56 | $40,793 | 7,745 Direct | -15.12% | Disposed | 229.5% (price as of 2026-10-02) |
| March 10, 2015 | IOSP | M | 3,794 | · | · | 9,125 Direct | -29.37% | Disposed | (price as of 2026-10-02) |
| March 10, 2015 | IOSP | S | 1,380 | $43.14 | $59,533 | 14,516 Direct | -8.68% | Disposed | 125.8% (price as of 2026-10-02) |
| March 10, 2015 | IOSP | M | 1,380 | $29.56 | $40,793 | 15,896 Direct | +9.51% | Acquired | 229.5% (price as of 2026-10-02) |
| March 10, 2015 | IOSP | S | 3,680 | $43.14 | $158,755 | 14,516 Direct | -20.22% | Disposed | 125.8% (price as of 2026-10-02) |
| March 10, 2015 | IOSP | M | 3,680 | · | · | 18,196 Direct | +25.35% | Acquired | (price as of 2026-10-02) |
| March 10, 2015 | IOSP | M | 1,380 | $29.56 | $40,793 | 7,745 Direct | -15.12% | Disposed | 229.5% (price as of 2026-10-02) |
| March 10, 2015 | IOSP | M | 3,794 | · | · | 9,125 Direct | -29.37% | Disposed | (price as of 2026-10-02) |
| March 10, 2015 | IOSP | S | 1,380 | $43.14 | $59,533 | 13,367 Direct | -9.36% | Disposed | 125.8% (price as of 2026-10-02) |
| March 10, 2015 | IOSP | M | 1,380 | $29.56 | $40,793 | 14,747 Direct | +10.32% | Acquired | 229.5% (price as of 2026-10-02) |
| March 10, 2015 | IOSP | S | 3,680 | $43.14 | $158,755 | 13,367 Direct | -21.59% | Disposed | 125.8% (price as of 2026-10-02) |
| March 10, 2015 | IOSP | M | 3,680 | · | · | 17,047 Direct | +27.53% | Acquired | (price as of 2026-10-02) |
| Feb. 24, 2015 | IOSP | M | 894 | · | · | 9,237 Direct | -8.82% | Disposed | (price as of 2026-10-02) |
| Feb. 24, 2015 | IOSP | M | 894 | · | · | 13,367 Direct | +7.17% | Acquired | (price as of 2026-10-02) |
| Feb. 23, 2015 | IOSP | A | 2,700 | · | · | 12,919 Direct | +26.42% | Acquired | (price as of 2026-10-02) |
| Feb. 23, 2015 | IOSP | A | 982 | $43.95 | $43,159 | 10,219 Direct | +10.63% | Acquired | 121.6% (price as of 2026-10-02) |
| June 6, 2014 | IOSP | P | 185 | $43.16 | $7,985 | 12,473 Direct | +1.51% | Acquired | 125.7% (price as of 2026-10-02) |
| Feb. 21, 2014 | IOSP | A | 277 | · | · | 10,131 Direct | +2.81% | Acquired | (price as of 2026-10-02) |
| Feb. 18, 2014 | IOSP | A | 277 | $44.59 | $12,351 | 12,288 Direct | +2.31% | Acquired | 118.5% (price as of 2026-10-02) |
| Feb. 14, 2014 | IOSP | A | 2,007 | · | · | 9,854 Direct | +25.58% | Acquired | (price as of 2026-10-02) |
| Feb. 14, 2014 | IOSP | A | 730 | $46.03 | $33,602 | 7,847 Direct | +10.26% | Acquired | 111.6% (price as of 2026-10-02) |
| June 6, 2013 | IOSP | M | 100 | · | · | 7,117 Direct | -1.39% | Disposed | (price as of 2026-10-02) |
| June 6, 2013 | IOSP | F | 31 | $41.04 | $1,272 | 12,011 Direct | -0.26% | Disposed | 137.4% (price as of 2026-10-02) |
| June 6, 2013 | IOSP | M | 100 | · | · | 12,042 Direct | +0.84% | Acquired | (price as of 2026-10-02) |
| April 12, 2013 | IOSP | F | 808 | $42.32 | $34,195 | 11,942 Direct | -6.34% | Disposed | 130.2% (price as of 2026-10-02) |
| April 4, 2013 | IOSP | M | 6,448 | · | · | 13,063 Direct | +97.48% | Acquired | (price as of 2026-10-02) |
| April 4, 2013 | IOSP | F | 1,999 | $39.88 | $79,720 | 11,064 Direct | -15.30% | Disposed | 144.3% (price as of 2026-10-02) |
| April 4, 2013 | IOSP | M | 6,448 | · | · | 8,903 Direct | -42.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2013 | IOSP | M | 1,686 | $10.38 | $17,501 | 7,217 Direct | -18.94% | Disposed | 838.4% (price as of 2026-10-02) |
| March 12, 2013 | IOSP | M | 1,686 | · | · | 12,750 Direct | +15.24% | Acquired | (price as of 2026-10-02) |
| Feb. 26, 2013 | IOSP | M | 1,365 | · | · | 15,351 Direct | -8.17% | Disposed | (price as of 2026-10-02) |
| Feb. 26, 2013 | IOSP | M | 1,365 | · | · | 6,615 Direct | +26.00% | Acquired | (price as of 2026-10-02) |
| Nov. 12, 2012 | IOSP | M | 342 | $14.03 | $4,798 | 16,716 Direct | -2.00% | Disposed | 594.3% (price as of 2026-10-02) |
| Nov. 12, 2012 | IOSP | A | 342 | $14.03 | $4,798 | 17,058 Direct | +2.05% | Acquired | 594.3% (price as of 2026-10-02) |
| Nov. 12, 2012 | IOSP | M | 342 | $14.03 | $4,798 | 5,250 Direct | -6.12% | Disposed | 594.3% (price as of 2026-10-02) |
| Feb. 23, 2012 | IOSP | A | 3,794 | · | · | 16,716 Direct | +29.36% | Acquired | (price as of 2026-10-02) |
| Feb. 23, 2012 | IOSP | A | 1,380 | $29.56 | $40,793 | 12,922 Direct | +11.96% | Acquired | 229.5% (price as of 2026-10-02) |
| Feb. 23, 2012 | IOSP | A | 894 | · | · | 11,542 Direct | +8.40% | Acquired | (price as of 2026-10-02) |
| Feb. 22, 2012 | IOSP | A | 894 | $29.79 | $26,632 | 4,908 Direct | +22.27% | Acquired | 227.0% (price as of 2026-10-02) |
| Feb. 25, 2011 | IOSP | A | 1,149 | · | · | 10,648 Direct | +12.10% | Acquired | (price as of 2026-10-02) |
| Feb. 18, 2011 | IOSP | P | 1,149 | $27.44 | $31,529 | 4,014 Direct | +40.10% | Acquired | 255.0% (price as of 2026-10-02) |
| Feb. 25, 2010 | IOSP | A | 1,365 | · | · | 9,499 Direct | +16.78% | Acquired | (price as of 2026-10-02) |
| Feb. 23, 2010 | IOSP | P | 1,365 | $10.57 | $14,428 | 2,865 Direct | +91.00% | Acquired | 821.6% (price as of 2026-10-02) |
| Feb. 17, 2010 | IOSP | A | 6,448 | · | · | 8,134 Direct | +382.44% | Acquired | (price as of 2026-10-02) |
| Feb. 17, 2010 | IOSP | A | 1,686 | · | · | 1,686 Direct | · | Acquired | (price as of 2026-10-02) |
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 |
|---|---|---|---|---|---|---|---|
| May 24, 2018 | IOSP | Stock Options | Common Stock | $44.18 | March 31, 2019 | 1,004 | Disposed |
| Feb. 23, 2018 | IOSP | Stock Options | Common Stock | $43.95 | Feb. 23, 2025 | 982 | Disposed |
| Feb. 23, 2018 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 23, 2025 | 2,160 | Disposed |
| Feb. 23, 2017 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 14, 2024 | 277 | Disposed |
| Feb. 23, 2017 | IOSP | Stock Options | Common Stock | $46.03 | Feb. 14, 2024 | 730 | Disposed |
| Feb. 23, 2017 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 14, 2024 | 1,505 | Disposed |
| Feb. 21, 2017 | IOSP | Stock Options | Common Stock | $70.60 | Feb. 21, 2027 | 644 | Acquired |
| Feb. 21, 2017 | IOSP | Stock Options | Common Stock | $0.00 | March 15, 2020 | 2,897 | Acquired |
| Feb. 22, 2016 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 22, 2026 | 2,760 | Acquired |
| Feb. 22, 2016 | IOSP | Stock Options | Common Stock | $44.18 | Feb. 22, 2026 | 1,004 | Acquired |
| March 10, 2015 | IOSP | Stock Options | Common Stock | $29.56 | Feb. 23, 2022 | 1,380 | Disposed |
| March 10, 2015 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 23, 2022 | 3,794 | Disposed |
| March 10, 2015 | IOSP | Stock Options | Common Stock | $29.56 | Feb. 23, 2022 | 1,380 | Disposed |
| March 10, 2015 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 23, 2022 | 3,794 | Disposed |
| Feb. 24, 2015 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 23, 2022 | 894 | Disposed |
| Feb. 23, 2015 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 23, 2025 | 2,700 | Acquired |
| Feb. 23, 2015 | IOSP | Stock Options | Common Stock | $43.95 | Feb. 23, 2025 | 982 | Acquired |
| Feb. 21, 2014 | IOSP | Stock Options (Co-Invest match) | Common Stock | $0.00 | Feb. 21, 2024 | 277 | Acquired |
| Feb. 14, 2014 | IOSP | Stock Options (PRSOP) | Common Stock | $0.00 | Feb. 14, 2018 | 2,007 | Acquired |
| Feb. 14, 2014 | IOSP | Stock Options (CSOP B) | Common Stock | $46.03 | Feb. 14, 2024 | 730 | Acquired |
| June 6, 2013 | IOSP | Stock Options | Common Stock | $0.00 | March 19, 2020 | 100 | Disposed |
| April 4, 2013 | IOSP | Stock Options | Common Stock | $0.00 | March 17, 2020 | 6,448 | Disposed |
| March 12, 2013 | IOSP | Stock Options | Common Stock | $10.38 | March 17, 2020 | 1,686 | Disposed |
| Feb. 26, 2013 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 25, 2020 | 1,365 | Disposed |
| Nov. 12, 2012 | IOSP | Stock Options | Common Stock | $14.03 | Jan. 17, 2013 | 342 | Disposed |
| Nov. 12, 2012 | IOSP | Stock Options | Common Stock | $14.03 | Jan. 17, 2013 | 342 | Acquired |
| Feb. 23, 2012 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 23, 2022 | 3,794 | Acquired |
| Feb. 23, 2012 | IOSP | Stock Options | Common Stock | $29.56 | Feb. 23, 2022 | 1,380 | Acquired |
| Feb. 23, 2012 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 23, 2022 | 894 | Acquired |
| Feb. 25, 2011 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 25, 2021 | 1,149 | Acquired |
| Feb. 25, 2010 | IOSP | Options | Common Stock | $0.00 | Feb. 25, 2020 | 1,365 | Acquired |
| Feb. 17, 2010 | IOSP | Options | Common Stock | $0.00 | Feb. 17, 2020 | 6,448 | Acquired |
| Feb. 17, 2010 | IOSP | Options | Common Stock | $10.38 | Feb. 17, 2020 | 1,686 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Sept. 25, 2009 | IOSP | Common Stock | 1,500 | Direct |