Michael C Harrington
Insider
First SEC filing: Feb. 11, 2016 · Latest: Feb. 11, 2016
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 |
|---|---|---|---|---|---|---|---|---|---|
| March 1, 2021 | WAT | A | 541 | · | · | 2,827 Direct | +23.67% | Acquired | (price as of 2026-10-06) |
| March 1, 2021 | WAT | F | 167 | · | · | 2,660 Direct | -5.91% | Disposed | (price as of 2026-10-06) |
| Feb. 18, 2021 | WAT | A | 5,397 | · | · | 5,397 Direct | · | Acquired | (price as of 2026-10-06) |
| Aug. 24, 2020 | WAT | M | 13,527 | · | · | 9,017 Direct | -60.00% | Disposed | (price as of 2026-10-06) |
| Aug. 24, 2020 | WAT | M | 5,254 | · | · | 5,254 Direct | -50.00% | Disposed | (price as of 2026-10-06) |
| Aug. 24, 2020 | WAT | M | 5,600 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Aug. 24, 2020 | WAT | S | 13,527 | $215.64 | $2,916,962 | 2,286 Direct | -85.54% | Disposed | 102.4% (price as of 2026-10-06) |
| Aug. 24, 2020 | WAT | M | 13,527 | $139.51 | $1,887,152 | 15,813 Direct | +591.73% | Acquired | 212.8% (price as of 2026-10-06) |
| Aug. 24, 2020 | WAT | S | 5,254 | $215.88 | $1,134,234 | 2,286 Direct | -69.68% | Disposed | 102.2% (price as of 2026-10-06) |
| Aug. 24, 2020 | WAT | M | 5,254 | $128.93 | $677,398 | 7,540 Direct | +229.83% | Acquired | 238.5% (price as of 2026-10-06) |
| Aug. 24, 2020 | WAT | S | 5,600 | $215.91 | $1,209,096 | 2,286 Direct | -71.01% | Disposed | 102.1% (price as of 2026-10-06) |
| Aug. 24, 2020 | WAT | M | 5,600 | $113.36 | $634,816 | 7,886 Direct | +244.97% | Acquired | 285.0% (price as of 2026-10-06) |
| March 2, 2020 | WAT | F | 964 | · | · | 2,286 Direct | -29.66% | Disposed | (price as of 2026-10-06) |
| March 2, 2020 | WAT | A | 3,250 | · | · | 3,250 Direct | · | Acquired | (price as of 2026-10-06) |
| Feb. 12, 2020 | WAT | A | 10,735 | · | · | 10,735 Direct | · | Acquired | (price as of 2026-10-06) |
| Nov. 13, 2019 | WAT | M | 7,871 | · | · | 5,248 Direct | -60.00% | Disposed | (price as of 2026-10-06) |
| Nov. 13, 2019 | WAT | M | 15,761 | · | · | 10,508 Direct | -60.00% | Disposed | (price as of 2026-10-06) |
| Nov. 13, 2019 | WAT | S | 7,871 | $213.27 | $1,678,648 | 0 Direct | -100.00% | Disposed | 104.6% (price as of 2026-10-06) |
| Nov. 13, 2019 | WAT | M | 7,871 | $117.68 | $926,259 | 7,871 Direct | · | Acquired | 270.9% (price as of 2026-10-06) |
| Nov. 13, 2019 | WAT | S | 15,761 | $213.32 | $3,362,137 | 0 Direct | -100.00% | Disposed | 104.6% (price as of 2026-10-06) |
| Nov. 13, 2019 | WAT | M | 15,761 | $128.93 | $2,032,066 | 15,761 Direct | · | Acquired | 238.5% (price as of 2026-10-06) |
| Feb. 13, 2019 | WAT | M | 22,400 | · | · | 5,600 Direct | -80.00% | Disposed | (price as of 2026-10-06) |
| Feb. 13, 2019 | WAT | S | 22,400 | $234.93 | $5,262,432 | 0 Direct | -100.00% | Disposed | 85.8% (price as of 2026-10-06) |
| Feb. 13, 2019 | WAT | M | 22,400 | $113.36 | $2,539,264 | 22,400 Direct | · | Acquired | 285.0% (price as of 2026-10-06) |
| Jan. 30, 2019 | WAT | M | 20,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Jan. 30, 2019 | WAT | S | 20,000 | $230.24 | $4,604,800 | 0 Direct | -100.00% | Disposed | 89.6% (price as of 2026-10-06) |
| Jan. 30, 2019 | WAT | M | 20,000 | $98.21 | $1,964,200 | 20,000 Direct | · | Acquired | 344.4% (price as of 2026-10-06) |
| Dec. 14, 2018 | WAT | S | 1,131 | $189.53 | $214,358 | 0 Direct | -100.00% | Disposed | 130.3% (price as of 2026-10-06) |
| Dec. 10, 2018 | WAT | A | 17,078 | · | · | 17,078 Direct | · | Acquired | (price as of 2026-10-06) |
| Dec. 6, 2018 | WAT | F | 906 | · | · | 1,131 Direct | -44.48% | Disposed | (price as of 2026-10-06) |
| June 1, 2018 | WAT | M | 15,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| June 1, 2018 | WAT | S | 15,000 | $194.64 | $2,919,600 | 2,037 Direct | -88.04% | Disposed | 124.2% (price as of 2026-10-06) |
| June 1, 2018 | WAT | M | 15,000 | $87.06 | $1,305,900 | 17,037 Direct | +736.38% | Acquired | 401.3% (price as of 2026-10-06) |
| May 7, 2018 | WAT | M | 15,000 | · | · | 15,000 Direct | -50.00% | Disposed | (price as of 2026-10-06) |
| May 7, 2018 | WAT | S | 1,078 | $194.34 | $209,499 | 2,037 Direct | -34.61% | Disposed | 124.6% (price as of 2026-10-06) |
| May 7, 2018 | WAT | S | 15,000 | $194.69 | $2,920,350 | 3,115 Direct | -82.80% | Disposed | 124.2% (price as of 2026-10-06) |
| May 7, 2018 | WAT | M | 15,000 | $87.06 | $1,305,900 | 18,115 Direct | +481.54% | Acquired | 401.3% (price as of 2026-10-06) |
| Dec. 6, 2017 | WAT | F | 958 | · | · | 3,115 Direct | -23.52% | Disposed | (price as of 2026-10-06) |
| Dec. 6, 2017 | WAT | F | 958 | · | · | 3,115 Direct | -23.52% | Disposed | (price as of 2026-10-06) |
| Dec. 5, 2017 | WAT | A | 18,055 | · | · | 18,055 Direct | · | Acquired | (price as of 2026-10-06) |
| Dec. 5, 2017 | WAT | A | 18,055 | · | · | 18,055 Direct | · | Acquired | (price as of 2026-10-06) |
| May 19, 2017 | WAT | S | 24,000 | $175.33 | $4,207,920 | 4,073 Direct | -85.49% | Disposed | 148.9% (price as of 2026-10-06) |
| May 19, 2017 | WAT | M | 24,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| May 19, 2017 | WAT | M | 24,000 | $79.15 | $1,899,600 | 28,073 Direct | +589.25% | Acquired | 451.4% (price as of 2026-10-06) |
| Feb. 13, 2017 | WAT | M | 16,800 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| Feb. 13, 2017 | WAT | S | 16,800 | $149.83 | $2,517,144 | 4,073 Direct | -80.49% | Disposed | 191.3% (price as of 2026-10-06) |
| Feb. 13, 2017 | WAT | M | 16,800 | $79.05 | $1,328,040 | 20,873 Direct | +412.47% | Acquired | 452.1% (price as of 2026-10-06) |
| Feb. 13, 2017 | WAT | S | 2,155 | $149.90 | $323,034 | 4,073 Direct | -34.60% | Disposed | 191.1% (price as of 2026-10-06) |
| Dec. 9, 2016 | WAT | A | 22,544 | · | · | 22,544 Direct | · | Acquired | (price as of 2026-10-06) |
| Dec. 6, 2016 | WAT | F | 959 | · | · | 6,228 Direct | -13.34% | Disposed | (price as of 2026-10-06) |
| June 2, 2016 | WAT | M | 11,200 | · | · | 16,800 Direct | -40.00% | Disposed | (price as of 2026-10-06) |
| June 2, 2016 | WAT | M | 12,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-06) |
| June 2, 2016 | WAT | S | 11,200 | $139.09 | $1,557,808 | 7,187 Direct | -60.91% | Disposed | 213.8% (price as of 2026-10-06) |
| June 2, 2016 | WAT | S | 12,000 | $139.08 | $1,668,960 | 18,387 Direct | -39.49% | Disposed | 213.8% (price as of 2026-10-06) |
| June 2, 2016 | WAT | M | 11,200 | $79.05 | $885,360 | 30,387 Direct | +58.37% | Acquired | 452.1% (price as of 2026-10-06) |
| June 2, 2016 | WAT | M | 12,000 | $77.94 | $935,280 | 19,187 Direct | +166.97% | Acquired | 460.0% (price as of 2026-10-06) |
| Feb. 10, 2016 | WAT | A | 13,119 | · | · | 13,119 Direct | · | Acquired | (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. 18, 2021 | WAT | Stock Option (Right to Buy) | Common Stock | $280.80 | Feb. 18, 2031 | 5,397 | Acquired |
| Aug. 24, 2020 | WAT | Stock Option (Right to Buy) | Common Stock | $139.51 | Dec. 9, 2026 | 13,527 | Disposed |
| Aug. 24, 2020 | WAT | Stock Option (Right to Buy) | Common Stock | $128.93 | Dec. 9, 2025 | 5,254 | Disposed |
| Aug. 24, 2020 | WAT | Stock Option (Right to Buy) | Common Stock | $113.36 | Dec. 11, 2024 | 5,600 | Disposed |
| Feb. 12, 2020 | WAT | Stock Option (Right to Buy) | Common Stock | $224.37 | Feb. 12, 2030 | 10,735 | Acquired |
| Nov. 13, 2019 | WAT | Stock Option (Right to Buy) | Common Stock | $117.68 | Feb. 10, 2026 | 7,871 | Disposed |
| Nov. 13, 2019 | WAT | Stock Option (Right to Buy) | Common Stock | $128.93 | Dec. 9, 2025 | 15,761 | Disposed |
| Feb. 13, 2019 | WAT | Stock Option (Right to Buy) | Common Stock | $113.36 | Dec. 11, 2024 | 22,400 | Disposed |
| Jan. 30, 2019 | WAT | Stock Option (Right to Buy) | Common Stock | $98.21 | Dec. 6, 2023 | 20,000 | Disposed |
| Dec. 10, 2018 | WAT | Stock Option (Right to Buy) | Common Stock | $189.54 | Dec. 10, 2028 | 17,078 | Acquired |
| June 1, 2018 | WAT | Stock Option (Right to Buy) | Common Stock | $87.06 | Dec. 11, 2022 | 15,000 | Disposed |
| May 7, 2018 | WAT | Stock Option (Right to Buy) | Common Stock | $87.06 | Dec. 11, 2022 | 15,000 | Disposed |
| Dec. 5, 2017 | WAT | Stock Option (Right to Buy) | Common Stock | · | Dec. 5, 2027 | 18,055 | Acquired |
| Dec. 5, 2017 | WAT | Stock Option (Right to Buy) | Common Stock | $194.25 | Dec. 5, 2027 | 18,055 | Acquired |
| May 19, 2017 | WAT | Stock Option (Right to Buy) | Common Stock | $79.15 | Dec. 7, 2021 | 24,000 | Disposed |
| Feb. 13, 2017 | WAT | Stock Option (Right to Buy) | Common Stock | $79.05 | Dec. 9, 2020 | 16,800 | Disposed |
| Dec. 9, 2016 | WAT | Stock Option (Right to Buy) | Common Stock | $139.51 | Dec. 9, 2026 | 22,544 | Acquired |
| June 2, 2016 | WAT | Stock Option (Right to Buy) | Common Stock | $79.05 | Dec. 9, 2020 | 11,200 | Disposed |
| June 2, 2016 | WAT | Stock Option (Right to Buy) | Common Stock | $77.94 | Dec. 11, 2017 | 12,000 | Disposed |
| Feb. 10, 2016 | WAT | Stock Option (Right to Buy) | Common Stock | $117.68 | Feb. 10, 2026 | 13,119 | Acquired |
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 |
|---|---|---|---|---|
| Feb. 11, 2016 | WAT | Common Stock | 7,187 | Indirect |
| Feb. 11, 2016 | WAT | Stock Option (Right to Buy) | 12,000 | Direct |
| Feb. 11, 2016 | WAT | Stock Option (Right to Buy) | 28,000 | Direct |
| Feb. 11, 2016 | WAT | Stock Option (Right to Buy) | 24,000 | Direct |
| Feb. 11, 2016 | WAT | Stock Option (Right to Buy) | 30,000 | Direct |
| Feb. 11, 2016 | WAT | Stock Option (Right to Buy) | 20,000 | Direct |
| Feb. 11, 2016 | WAT | Stock Option (Right to Buy) | 28,000 | Direct |
| Feb. 11, 2016 | WAT | Stock Option (Right to Buy) | 26,269 | Direct |