David Michael Williams
Insider
First SEC filing: Aug. 13, 2020 · Latest: May 7, 2026
Insider at
Insider transactions
0 buys (P)
5 sells (S)
Net: $-8,134,652
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 |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 5, 2026 | MRK | M | 4,600 | $77.62 | $357,052 | 36,316 Direct | +14.50% | Acquired | 85.9% (price as of 2026-10-02) |
| Aug. 5, 2026 | MRK | S | 4,600 | $128.77 | $592,342 | 31,716 Direct | -12.67% | Disposed | 12.1% (price as of 2026-10-02) |
| Aug. 5, 2026 | MRK | M | 13,542 | $75.36 | $1,020,525 | 45,258 Direct | +42.70% | Acquired | 91.5% (price as of 2026-10-02) |
| Aug. 5, 2026 | MRK | S | 13,542 | $128.77 | $1,743,803 | 31,716 Direct | -29.92% | Disposed | 12.1% (price as of 2026-10-02) |
| Aug. 5, 2026 | MRK | M | 34,705 | $73.73 | $2,558,800 | 66,421 Direct | +109.42% | Acquired | 95.7% (price as of 2026-10-02) |
| Aug. 5, 2026 | MRK | S | 34,705 | $128.77 | $4,468,963 | 31,716 Direct | -52.25% | Disposed | 12.1% (price as of 2026-10-02) |
| Aug. 5, 2026 | MRK | M | 4,600 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 5, 2026 | MRK | M | 13,542 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 5, 2026 | MRK | M | 34,705 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 5, 2026 | MRK | A | 13,582 | · | · | 13,582 Direct | · | Acquired | (price as of 2026-10-02) |
| May 5, 2026 | MRK | A | 4,640 | · | · | 4,640 Direct | · | Acquired | (price as of 2026-10-02) |
| April 29, 2026 | MRK | M | 1,377 | · | · | 2,755 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| April 29, 2026 | MRK | F | 679 | $110.03 | $74,710 | 31,716 Direct | -2.10% | Disposed | 31.1% (price as of 2026-10-02) |
| April 29, 2026 | MRK | M | 1,377 | $110.03 | $151,511 | 32,395 Direct | +4.44% | Acquired | 31.1% (price as of 2026-10-02) |
| Feb. 6, 2026 | MRK | M | 5,000 | · | · | 4,600 Direct | -52.08% | Disposed | (price as of 2026-10-02) |
| Feb. 6, 2026 | MRK | S | 5,000 | $121.90 | $609,500 | 30,838 Direct | -13.95% | Disposed | 18.4% (price as of 2026-10-02) |
| Feb. 6, 2026 | MRK | M | 5,000 | $77.62 | $388,100 | 35,838 Direct | +16.21% | Acquired | 85.9% (price as of 2026-10-02) |
| Jan. 26, 2026 | MRK | A | 6,112 | $107.40 | $656,429 | 30,838 Direct | +24.72% | Acquired | 34.4% (price as of 2026-10-02) |
| Nov. 3, 2025 | MRK | S | 8,614 | $83.59 | $720,044 | 24,578 Direct | -25.95% | Disposed | 72.6% (price as of 2026-10-02) |
| Aug. 4, 2025 | MRK | M | 17,119 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 4, 2025 | MRK | F | 8,432 | $79.29 | $668,573 | 33,013 Direct | -20.35% | Disposed | 82.0% (price as of 2026-10-02) |
| Aug. 4, 2025 | MRK | M | 17,119 | $79.29 | $1,357,366 | 41,445 Direct | +70.37% | Acquired | 82.0% (price as of 2026-10-02) |
| April 29, 2025 | MRK | A | 18,807 | · | · | 18,807 Direct | · | Acquired | (price as of 2026-10-02) |
| April 29, 2025 | MRK | A | 4,132 | · | · | 4,132 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 13, 2025 | MRK | S | 6,000 | $85.34 | $512,040 | 24,123 Direct | -19.92% | Disposed | 69.1% (price as of 2026-10-02) |
| Jan. 27, 2025 | MRK | A | 10,246 | $97.94 | $1,003,493 | 30,123 Direct | +51.55% | Acquired | 47.3% (price as of 2026-10-02) |
| April 30, 2024 | MRK | A | 16,406 | · | · | 16,406 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 7, 2024 | MRK | S | 1,451 | $127.57 | $185,104 | 19,812 Direct | -6.82% | Disposed | 13.1% (price as of 2026-10-02) |
| Jan. 22, 2024 | MRK | A | 10,196 | $119.43 | $1,217,708 | 21,263 Direct | +92.13% | Acquired | 20.8% (price as of 2026-10-02) |
| May 2, 2023 | MRK | A | 19,364 | · | · | 19,364 Direct | · | Acquired | (price as of 2026-10-02) |
| May 2, 2023 | MRK | S | 7,509 | $116.82 | $877,201 | 11,059 Direct | -40.44% | Disposed | 23.5% (price as of 2026-10-02) |
| May 2, 2023 | MRK | M | 6,035 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 2, 2023 | MRK | M | 6,035 | $56.04 | $338,201 | 18,568 Direct | +48.15% | Acquired | 157.5% (price as of 2026-10-02) |
| May 1, 2023 | MRK | M | 577 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 1, 2023 | MRK | F | 198 | $115.47 | $22,863 | 12,533 Direct | -1.56% | Disposed | 25.0% (price as of 2026-10-02) |
| May 1, 2023 | MRK | M | 577 | $115.47 | $66,626 | 12,731 Direct | +4.75% | Acquired | 25.0% (price as of 2026-10-02) |
| Feb. 10, 2023 | MRK | M | 1,205 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 10, 2023 | MRK | F | 413 | $106.72 | $44,075 | 12,092 Direct | -3.30% | Disposed | 35.2% (price as of 2026-10-02) |
| Feb. 10, 2023 | MRK | M | 1,205 | $106.72 | $128,598 | 12,505 Direct | +10.66% | Acquired | 35.2% (price as of 2026-10-02) |
| Jan. 23, 2023 | MRK | A | 1,745 | $109.88 | $191,741 | 11,008 Direct | +18.84% | Acquired | 31.3% (price as of 2026-10-02) |
| Aug. 3, 2022 | MRK | A | 17,119 | · | · | 17,119 Direct | · | Acquired | (price as of 2026-10-02) |
| May 3, 2022 | MRK | A | 21,359 | · | · | 21,359 Direct | · | Acquired | (price as of 2026-10-02) |
| May 3, 2022 | MRK | M | 427 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 3, 2022 | MRK | F | 147 | $87.65 | $12,885 | 9,263 Direct | -1.56% | Disposed | 64.6% (price as of 2026-10-02) |
| May 3, 2022 | MRK | M | 427 | $87.65 | $37,427 | 9,410 Direct | +4.75% | Acquired | 64.6% (price as of 2026-10-02) |
| May 1, 2022 | MRK | M | 577 | · | · | 577 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| May 1, 2022 | MRK | F | 198 | $88.69 | $17,561 | 8,983 Direct | -2.16% | Disposed | 62.7% (price as of 2026-10-02) |
| May 1, 2022 | MRK | M | 577 | $88.69 | $51,174 | 9,181 Direct | +6.71% | Acquired | 62.7% (price as of 2026-10-02) |
| Feb. 24, 2022 | MRK | A | 1,660 | $73.51 | $122,027 | 8,604 Direct | +23.91% | Acquired | 96.3% (price as of 2026-10-02) |
| Feb. 10, 2022 | MRK | M | 1,202 | · | · | 1,205 Direct | -49.94% | Disposed | (price as of 2026-10-02) |
| Feb. 10, 2022 | MRK | F | 477 | $76.53 | $36,505 | 6,944 Direct | -6.43% | Disposed | 88.6% (price as of 2026-10-02) |
| Feb. 10, 2022 | MRK | M | 1,202 | $76.53 | $91,989 | 7,421 Direct | +19.33% | Acquired | 88.6% (price as of 2026-10-02) |
| May 4, 2021 | MRK | M | 417 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 4, 2021 | MRK | A | 33,673 | · | · | 33,673 Direct | · | Acquired | (price as of 2026-10-02) |
| May 4, 2021 | MRK | F | 143 | $75.98 | $10,865 | 5,519 Direct | -2.53% | Disposed | 99.0% (price as of 2026-10-02) |
| May 4, 2021 | MRK | M | 417 | $75.98 | $31,684 | 5,662 Direct | +7.95% | Acquired | 99.0% (price as of 2026-10-02) |
| May 3, 2021 | MRK | M | 412 | · | · | 414 Direct | -49.88% | Disposed | (price as of 2026-10-02) |
| May 3, 2021 | MRK | F | 142 | $74.50 | $10,579 | 5,245 Direct | -2.64% | Disposed | 103.0% (price as of 2026-10-02) |
| May 3, 2021 | MRK | M | 412 | $74.50 | $30,694 | 5,387 Direct | +8.28% | Acquired | 103.0% (price as of 2026-10-02) |
| May 1, 2021 | MRK | M | 560 | · | · | 1,120 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| May 1, 2021 | MRK | F | 192 | $74.50 | $14,304 | 4,975 Direct | -3.72% | Disposed | 103.0% (price as of 2026-10-02) |
| May 1, 2021 | MRK | M | 560 | $74.50 | $41,720 | 5,167 Direct | +12.16% | Acquired | 103.0% (price as of 2026-10-02) |
| Feb. 26, 2021 | MRK | A | 2,090 | $72.62 | $151,776 | 4,583 Direct | +83.83% | Acquired | 108.2% (price as of 2026-10-02) |
| Feb. 10, 2021 | MRK | M | 1,167 | · | · | 2,335 Direct | -33.32% | Disposed | (price as of 2026-10-02) |
| Feb. 10, 2021 | MRK | F | 467 | $75.04 | $35,044 | 3,193 Direct | -12.76% | Disposed | 101.5% (price as of 2026-10-02) |
| Feb. 10, 2021 | MRK | M | 1,167 | $75.04 | $87,572 | 3,660 Direct | +46.81% | Acquired | 101.5% (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 |
|---|---|---|---|---|---|---|---|
| Aug. 5, 2026 | MRK | Stock Option (Right to Buy) | Common Stock | $77.62 | May 2, 2029 | 4,600 | Disposed |
| Aug. 5, 2026 | MRK | Stock Option (Right to Buy) | Common Stock | · | April 30, 2030 | 13,542 | Disposed |
| Aug. 5, 2026 | MRK | Stock Option (Right to Buy) | Common Stock | · | May 3, 2031 | 34,705 | Disposed |
| May 5, 2026 | MRK | Stock Option (Right to Buy) | Common Stock | $113.15 | May 4, 2036 | 13,582 | Acquired |
| May 5, 2026 | MRK | Restricted Stock Unit | Common Stock | · | May 5, 2029 | 4,640 | Acquired |
| April 29, 2026 | MRK | Restricted Stock Unit | Common Stock | · | April 29, 2028 | 1,377 | Disposed |
| Feb. 6, 2026 | MRK | Stock Option (Right to Buy) | Common Stock | · | May 2, 2029 | 5,000 | Disposed |
| Aug. 4, 2025 | MRK | Restricted Stock Unit | Common Stock | · | Aug. 3, 2025 | 17,119 | Disposed |
| April 29, 2025 | MRK | Stock Option (Right to Buy) | Common Stock | $84.71 | April 28, 2035 | 18,807 | Acquired |
| April 29, 2025 | MRK | Restricted Stock Unit | Common Stock | · | April 29, 2028 | 4,132 | Acquired |
| April 30, 2024 | MRK | Stock Option (Right to Buy) | Common Stock | $129.22 | April 29, 2034 | 16,406 | Acquired |
| May 2, 2023 | MRK | Stock Option (Right to Buy) | Common Stock | $117.89 | May 1, 2033 | 19,364 | Acquired |
| May 2, 2023 | MRK | Stock Option (Right to Buy) | Common Stock | · | May 3, 2028 | 6,035 | Disposed |
| May 1, 2023 | MRK | Restricted Stock Unit | Common Stock | · | May 1, 2023 | 577 | Disposed |
| Feb. 10, 2023 | MRK | Restricted Stock Unit | Common Stock | · | Feb. 10, 2023 | 1,205 | Disposed |
| Aug. 3, 2022 | MRK | Restricted Stock Unit | Common Stock | · | Aug. 3, 2025 | 17,119 | Acquired |
| May 3, 2022 | MRK | Stock Option (Right to Buy) | Common Stock | $87.10 | May 2, 2032 | 21,359 | Acquired |
| May 3, 2022 | MRK | Restricted Stock Unit | Common Stock | · | May 3, 2022 | 427 | Disposed |
| May 1, 2022 | MRK | Restricted Stock Unit | Common Stock | · | May 1, 2023 | 577 | Disposed |
| Feb. 10, 2022 | MRK | Restricted Stock Unit | Common Stock | · | Feb. 10, 2023 | 1,202 | Disposed |
| May 4, 2021 | MRK | Restricted Stock Unit | Common Stock | · | May 4, 2021 | 417 | Disposed |
| May 4, 2021 | MRK | Stock Option (Right to Buy) | Common Stock | $75.99 | May 3, 2031 | 33,673 | Acquired |
| May 3, 2021 | MRK | Restricted Stock Unit | Common Stock | · | May 3, 2022 | 412 | Disposed |
| May 1, 2021 | MRK | Restricted Stock Unit | Common Stock | · | May 1, 2023 | 560 | Disposed |
| Feb. 10, 2021 | MRK | Restricted Stock Unit | Common Stock | · | Feb. 10, 2023 | 1,167 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 8 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Aug. 13, 2020 | MRK | Common Stock | 2,492 | Direct |
| Aug. 13, 2020 | MRK | Restricted Stock Unit | 417 | Direct |
| Aug. 13, 2020 | MRK | Restricted Stock Unit | 826 | Direct |
| Aug. 13, 2020 | MRK | Restricted Stock Unit | 3,502 | Direct |
| Aug. 13, 2020 | MRK | Restricted Stock Unit | 1,680 | Direct |
| Aug. 13, 2020 | MRK | Stock Option (Right to Buy) | 5,856 | Direct |
| Aug. 13, 2020 | MRK | Stock Option (Right to Buy) | 9,315 | Direct |
| Aug. 13, 2020 | MRK | Stock Option (Right to Buy) | 13,139 | Direct |