Milton C Blackmore
Insider
First SEC filing: Oct. 8, 2010 · Latest: Oct. 8, 2010
Insider at
Insider transactions
0 buys (P)
4 sells (S)
Net: $-175,245
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 |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 27, 2026 | IOSP | S | 307 | $76.79 | $23,575 | 10,530 Direct | -2.83% | Disposed | 28.3% (price as of 2026-10-06) |
| Feb. 27, 2026 | IOSP | S | 287 | $76.30 | $21,898 | 10,837 Direct | -2.58% | Disposed | 29.2% (price as of 2026-10-06) |
| Feb. 27, 2026 | IOSP | S | 594 | $76.56 | $45,477 | 10,530 Direct | -5.34% | Disposed | 28.7% (price as of 2026-10-06) |
| Feb. 23, 2026 | IOSP | A | 1,539 | · | · | 11,124 Direct | +16.06% | Acquired | (price as of 2026-10-06) |
| Feb. 20, 2026 | IOSP | M | 1,030 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Feb. 20, 2026 | IOSP | S | 1,030 | $81.84 | $84,295 | 9,585 Direct | -9.70% | Disposed | 20.4% (price as of 2026-10-06) |
| Feb. 20, 2026 | IOSP | M | 1,030 | $44.18 | $45,505 | 10,615 Direct | +10.75% | Acquired | 123.1% (price as of 2026-10-06) |
| Feb. 24, 2025 | IOSP | A | 1,209 | · | · | 9,585 Direct | +14.43% | Acquired | (price as of 2026-10-06) |
| Feb. 21, 2025 | IOSP | S | 652 | $103.30 | $67,352 | 8,376 Direct | -7.22% | Disposed | -4.6% (price as of 2026-10-06) |
| Nov. 13, 2024 | IOSP | M | 1,035 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Nov. 13, 2024 | IOSP | S | 1,035 | $122.92 | $127,222 | 9,028 Direct | -10.29% | Disposed | -19.8% (price as of 2026-10-06) |
| Nov. 13, 2024 | IOSP | M | 1,035 | $43.95 | $45,488 | 10,063 Direct | +11.46% | Acquired | 124.2% (price as of 2026-10-06) |
| Feb. 26, 2024 | IOSP | A | 782 | · | · | 9,028 Direct | +9.48% | Acquired | (price as of 2026-10-06) |
| Feb. 22, 2024 | IOSP | S | 601 | $122.07 | $73,364 | 8,246 Direct | -6.79% | Disposed | -19.3% (price as of 2026-10-06) |
| Feb. 27, 2023 | IOSP | A | 297 | · | · | 297 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 27, 2023 | IOSP | A | 594 | · | · | 7,594 Direct | +8.49% | Acquired | (price as of 2026-10-06) |
| Feb. 25, 2022 | IOSP | M | 740 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Feb. 25, 2022 | IOSP | S | 74 | $97.53 | $7,217 | 7,253 Direct | -1.01% | Disposed | 1.0% (price as of 2026-10-06) |
| Feb. 25, 2022 | IOSP | S | 666 | $96.69 | $64,396 | 7,327 Direct | -8.33% | Disposed | 1.9% (price as of 2026-10-06) |
| Feb. 25, 2022 | IOSP | M | 740 | · | · | 7,993 Direct | +10.20% | Acquired | (price as of 2026-10-06) |
| Feb. 21, 2022 | IOSP | A | 326 | · | · | 326 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 21, 2022 | IOSP | A | 652 | · | · | 7,253 Direct | +9.88% | Acquired | (price as of 2026-10-06) |
| Nov. 10, 2021 | IOSP | M | 293 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Nov. 10, 2021 | IOSP | S | 293 | $93.70 | $27,454 | 6,601 Direct | -4.25% | Disposed | 5.2% (price as of 2026-10-06) |
| Nov. 10, 2021 | IOSP | M | 293 | · | · | 6,894 Direct | +4.44% | Acquired | (price as of 2026-10-06) |
| Feb. 22, 2021 | IOSP | A | 300 | · | · | 300 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 22, 2021 | IOSP | A | 601 | · | · | 601 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 22, 2021 | IOSP | A | 601 | · | · | 6,601 Direct | +10.02% | Acquired | (price as of 2026-10-06) |
| Feb. 22, 2021 | IOSP | A | 300 | · | · | 300 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 24, 2020 | IOSP | A | 627 | · | · | 627 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 24, 2020 | IOSP | A | 313 | · | · | 313 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 24, 2020 | IOSP | M | 283 | · | · | 0 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 24, 2020 | IOSP | S | 283 | $91.75 | $25,965 | 6,000 Direct | -4.50% | Disposed | 7.4% (price as of 2026-10-06) |
| Feb. 24, 2020 | IOSP | M | 283 | · | · | 6,283 Direct | +4.72% | Acquired | (price as of 2026-10-06) |
| Feb. 25, 2019 | IOSP | A | 370 | $81.07 | $29,996 | 5,481 Direct | +7.24% | Acquired | 21.6% (price as of 2026-10-06) |
| Feb. 25, 2019 | IOSP | A | 740 | · | · | 5,111 Direct | +16.93% | Acquired | (price as of 2026-10-06) |
| Feb. 25, 2019 | IOSP | M | 441 | · | · | 4,371 Direct | -9.16% | Disposed | (price as of 2026-10-06) |
| Feb. 25, 2019 | IOSP | S | 441 | $81.62 | $35,994 | 6,000 Direct | -6.85% | Disposed | 20.7% (price as of 2026-10-06) |
| Feb. 25, 2019 | IOSP | M | 441 | · | · | 6,441 Direct | +7.35% | Acquired | (price as of 2026-10-06) |
| June 1, 2018 | IOSP | M | 444 | · | · | 4,812 Direct | -8.45% | Disposed | (price as of 2026-10-06) |
| June 1, 2018 | IOSP | S | 444 | $76.83 | $34,113 | 6,000 Direct | -6.89% | Disposed | 28.3% (price as of 2026-10-06) |
| June 1, 2018 | IOSP | M | 444 | · | · | 6,444 Direct | +7.40% | Acquired | (price as of 2026-10-06) |
| Feb. 20, 2018 | IOSP | A | 880 | $68.20 | $60,016 | 5,256 Direct | +20.11% | Acquired | 44.5% (price as of 2026-10-06) |
| Feb. 20, 2018 | IOSP | A | 293 | · | · | 4,376 Direct | +7.18% | Acquired | (price as of 2026-10-06) |
| Nov. 29, 2017 | IOSP | M | 977 | $46.03 | $44,971 | 4,083 Direct | -19.31% | Disposed | 114.1% (price as of 2026-10-06) |
| Nov. 29, 2017 | IOSP | S | 977 | $73.67 | $71,976 | 6,000 Direct | -14.00% | Disposed | 33.8% (price as of 2026-10-06) |
| Nov. 29, 2017 | IOSP | M | 977 | $46.03 | $44,971 | 6,977 Direct | +16.28% | Acquired | 114.1% (price as of 2026-10-06) |
| Sept. 7, 2017 | IOSP | P | 442 | $54.75 | $24,200 | 6,000 Direct | +7.95% | Acquired | 80.0% (price as of 2026-10-06) |
| Feb. 21, 2017 | IOSP | A | 283 | · | · | 5,060 Direct | +5.92% | Acquired | (price as of 2026-10-06) |
| Feb. 21, 2017 | IOSP | A | 850 | $70.60 | $60,010 | 4,777 Direct | +21.65% | Acquired | 39.6% (price as of 2026-10-06) |
| Dec. 6, 2016 | IOSP | M | 1,089 | $41.31 | $44,987 | 3,927 Direct | -21.71% | Disposed | 138.6% (price as of 2026-10-06) |
| Dec. 6, 2016 | IOSP | S | 1,089 | $68.35 | $74,433 | 5,558 Direct | -16.38% | Disposed | 44.2% (price as of 2026-10-06) |
| Dec. 6, 2016 | IOSP | M | 1,089 | $41.31 | $44,987 | 6,647 Direct | +19.59% | Acquired | 138.6% (price as of 2026-10-06) |
| Feb. 23, 2016 | IOSP | M | 1,522 | $29.56 | $44,990 | 3,657 Direct | -29.39% | Disposed | 233.4% (price as of 2026-10-06) |
| Feb. 23, 2016 | IOSP | M | 1,380 | $32.60 | $44,988 | 5,179 Direct | -21.04% | Disposed | 202.3% (price as of 2026-10-06) |
| Feb. 23, 2016 | IOSP | F | 1,026 | $43.85 | $44,990 | 5,558 Direct | -15.58% | Disposed | 124.7% (price as of 2026-10-06) |
| Feb. 23, 2016 | IOSP | M | 1,522 | $29.56 | $44,990 | 6,584 Direct | +30.07% | Acquired | 233.4% (price as of 2026-10-06) |
| Feb. 23, 2016 | IOSP | F | 1,026 | $43.85 | $44,990 | 5,062 Direct | -16.85% | Disposed | 124.7% (price as of 2026-10-06) |
| Feb. 23, 2016 | IOSP | M | 1,380 | $32.60 | $44,988 | 6,088 Direct | +29.31% | Acquired | 202.3% (price as of 2026-10-06) |
| Feb. 22, 2016 | IOSP | A | 441 | · | · | 5,128 Direct | +9.41% | Acquired | (price as of 2026-10-06) |
| Feb. 22, 2016 | IOSP | A | 1,030 | $44.18 | $45,505 | 4,687 Direct | +28.17% | Acquired | 123.1% (price as of 2026-10-06) |
| Feb. 22, 2016 | IOSP | A | 441 | · | · | 5,016 Direct | +9.64% | Acquired | (price as of 2026-10-06) |
| Feb. 22, 2016 | IOSP | A | 1,030 | $44.18 | $45,505 | 4,575 Direct | +29.06% | Acquired | 123.1% (price as of 2026-10-06) |
| Feb. 23, 2015 | IOSP | A | 444 | · | · | 6,559 Direct | +7.26% | Acquired | (price as of 2026-10-06) |
| Feb. 23, 2015 | IOSP | A | 1,035 | $43.95 | $45,488 | 6,115 Direct | +20.37% | Acquired | 124.2% (price as of 2026-10-06) |
| Feb. 20, 2015 | IOSP | M | 1,000 | · | · | 5,080 Direct | -16.45% | Disposed | (price as of 2026-10-06) |
| Feb. 20, 2015 | IOSP | M | 1,000 | · | · | 4,708 Direct | +26.97% | Acquired | (price as of 2026-10-06) |
| Feb. 14, 2014 | IOSP | A | 1,089 | $46.03 | $50,127 | 6,080 Direct | +21.82% | Acquired | 114.1% (price as of 2026-10-06) |
| July 5, 2013 | IOSP | J | 995 | $40.18 | $39,979 | 3,708 Direct | +36.68% | Acquired | 145.3% (price as of 2026-10-06) |
| Feb. 20, 2013 | IOSP | A | 1,089 | $41.31 | $44,987 | 4,991 Direct | +27.91% | Acquired | 138.6% (price as of 2026-10-06) |
| July 6, 2012 | IOSP | J | 1,350 | $29.61 | $39,974 | 2,713 Direct | +99.05% | Acquired | 232.8% (price as of 2026-10-06) |
| July 6, 2012 | IOSP | J | 1,350 | $26.01 | $35,114 | 2,713 Direct | +99.05% | Acquired | 278.9% (price as of 2026-10-06) |
| Feb. 23, 2012 | IOSP | A | 1,522 | $29.56 | $44,990 | 3,902 Direct | +63.95% | Acquired | 233.4% (price as of 2026-10-06) |
| July 6, 2011 | IOSP | J | 297 | $33.61 | $9,982 | 1,363 Direct | +27.86% | Acquired | 193.2% (price as of 2026-10-06) |
| May 12, 2011 | IOSP | A | 1,380 | $32.60 | $44,988 | 2,380 Direct | +138.00% | Acquired | 202.3% (price as of 2026-10-06) |
| May 12, 2011 | IOSP | A | 1,000 | · | · | 1,000 Direct | · | Acquired | (price as of 2026-10-06) |
| July 6, 2010 | IOSP | J | 1,066 | $9.38 | $9,999 | 2,066 Direct | +106.60% | Acquired | 950.6% (price as of 2026-10-06) |
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 |
|---|---|---|---|---|---|---|---|
| Feb. 20, 2026 | IOSP | Stock Option | Common Stock | $44.18 | Feb. 22, 2026 | 1,030 | Disposed |
| Nov. 13, 2024 | IOSP | Stock Option (Right to Buy) | Common Stock | $43.95 | Feb. 23, 2025 | 1,035 | Disposed |
| Feb. 27, 2023 | IOSP | Stock Option | Common Stock | $109.42 | Feb. 27, 2033 | 297 | Acquired |
| Feb. 25, 2022 | IOSP | Stock Option | Common Stock | $0.00 | Feb. 25, 2022 | 740 | Disposed |
| Feb. 21, 2022 | IOSP | Stock Option | Common Stock | $99.68 | Feb. 21, 2032 | 326 | Acquired |
| Nov. 10, 2021 | IOSP | Stock Option | Common Stock | $0.00 | March 15, 2022 | 293 | Disposed |
| Feb. 22, 2021 | IOSP | stock option | Common Stock | $99.85 | Feb. 22, 2031 | 300 | Acquired |
| Feb. 22, 2021 | IOSP | stock option | Common Stock | $0.00 | Feb. 22, 2024 | 601 | Acquired |
| Feb. 22, 2021 | IOSP | Stock Option | Common Stock | $99.85 | Feb. 22, 2031 | 300 | Acquired |
| Feb. 24, 2020 | IOSP | stock option | stock option | $0.00 | Feb. 24, 2023 | 627 | Acquired |
| Feb. 24, 2020 | IOSP | Stock Option | stock option | $95.70 | Feb. 24, 2030 | 313 | Acquired |
| Feb. 24, 2020 | IOSP | Stock Option | Common Stock | $0.00 | Feb. 21, 2027 | 283 | Acquired |
| Feb. 25, 2019 | IOSP | Stock Options | Common Stock | $81.07 | Feb. 25, 2029 | 370 | Acquired |
| Feb. 25, 2019 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 25, 2029 | 740 | Acquired |
| Feb. 25, 2019 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 25, 2026 | 441 | Disposed |
| June 1, 2018 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 23, 2025 | 444 | Disposed |
| Feb. 20, 2018 | IOSP | Stock Option | Common Stock | $68.20 | Feb. 20, 2028 | 880 | Acquired |
| Feb. 20, 2018 | IOSP | Stock Option | Common Stock | $0.00 | Feb. 20, 2028 | 293 | Acquired |
| Nov. 29, 2017 | IOSP | Stock Options | Common Stockk | $46.03 | Feb. 14, 2024 | 977 | Disposed |
| Feb. 21, 2017 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 21, 2027 | 283 | Acquired |
| Feb. 21, 2017 | IOSP | Stock Options | Common Stock | $70.60 | Feb. 21, 2027 | 850 | Acquired |
| Dec. 6, 2016 | IOSP | Stock Options | Common Stock | $41.31 | Feb. 20, 2023 | 1,089 | Disposed |
| Feb. 23, 2016 | IOSP | Stock Options | Common Stock | $29.56 | Feb. 23, 2022 | 1,522 | Disposed |
| Feb. 23, 2016 | IOSP | Stock Options | Common Stock | $32.60 | May 12, 2021 | 1,380 | Disposed |
| Feb. 22, 2016 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 22, 2026 | 441 | Acquired |
| Feb. 22, 2016 | IOSP | Stock Options | Common Stock | $44.18 | Feb. 22, 2026 | 1,030 | Acquired |
| Feb. 22, 2016 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 22, 2026 | 441 | Acquired |
| Feb. 22, 2016 | IOSP | Stock Options | Common Stock | $44.18 | Feb. 22, 2026 | 1,030 | Acquired |
| Feb. 23, 2015 | IOSP | Stock Options | Common Stock | $0.00 | Feb. 23, 2025 | 444 | Acquired |
| Feb. 23, 2015 | IOSP | Stock Options | Common Stock | $43.95 | Feb. 23, 2025 | 1,035 | Acquired |
| Feb. 20, 2015 | IOSP | Stock Options | Common Stock | $0.00 | May 12, 2021 | 1,000 | Disposed |
| Feb. 14, 2014 | IOSP | Stock Options (NEDSOP) | Common Stock | $46.03 | Feb. 14, 2024 | 1,089 | Acquired |
| Feb. 20, 2013 | IOSP | Stock Option (NEDSOP) | Common Stock | $41.31 | Feb. 20, 2023 | 1,089 | Acquired |
| Feb. 23, 2012 | IOSP | Stock Options | Common Stock | $29.56 | Feb. 23, 2022 | 1,522 | Acquired |
| May 12, 2011 | IOSP | Stock Options | Common Stock | $32.60 | May 12, 2021 | 1,380 | Acquired |
| May 12, 2011 | IOSP | Stock Options | Common Stock | $0.00 | May 12, 2021 | 1,000 | 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 |
|---|---|---|---|---|
| Oct. 8, 2010 | IOSP | Common Stock | 1,000 | Direct |