WATWaters Corporation
Healthcare · Diagnostics & ResearchNYSEStockMkt cap $39.8B
Disclosed trades
44
0 in 30d · 1 in 90d
Politicians
11
Last trade Aug 13, 2026
Buys
22
$176K at range midpoints
Sells
18
$160.5K at range midpoints
Closing price · 365 days
Nov 6, 2025 – Nov 5, 2026
Monthly buys vs sells · 24 months
Counts of disclosed transactions
- Buys
- Sells (incl. partial)
Politicians who traded it
5 hold it now Estimated
| Politician | Seat | Trades | Buys | Sells | Bought (mid) | Sold (mid) | Last trade | Est. position Estimated |
|---|---|---|---|---|---|---|---|---|
| DRo Khanna | House · CA-17 | 18 | 10 | 8 | $80K | $80.5K | Jun 2, 2026 | $24.1K |
| DGilbert Ray Cisneros, Jr. | House · CA-31 | 5 | 5 | 0 | $40K | $0 | Mar 18, 2026 | $61.5K |
| RByron Donalds | House · FL-19 | 4 | 1 | 1 | $8K | $8K | Feb 24, 2023 | — |
| RJulia Letlow | House · LA-05 | 3 | 2 | 1 | $16K | $8K | Dec 8, 2025 | $9.6K |
| RRobert P. Bresnahan, Jr. | House · PA-08 | 3 | 2 | 1 | $16K | $8K | May 15, 2025 | $10.3K |
| RTommy Tuberville | Senate · AL | 3 | 1 | 2 | $8K | $16K | May 3, 2024 | $1.5K |
| RKevin Hern | House · OK-01 | 2 | 0 | 1 | $0 | $8K | Aug 13, 2026 | — |
| RLisa C. McClain | House · MI-09 | 2 | 1 | 1 | $8K | $8K | Jul 22, 2025 | — |
| DLois Frankel | House · FL-22 | 2 | 0 | 2 | $0 | $16K | Sep 8, 2023 | — |
| RThomas H. Kean, Jr. | House · NJ-07 | 2 | 0 | 2 | $0 | $16K | Mar 10, 2026 | — |
| DDebbie Dingell | House · MI-06 | 1 | 0 | 0 | $0 | $0 | Feb 10, 2026 | — |
Recent trades
| Politician | Ticker | Asset | Type | Owner | Amount | vs S&P Estimated | Traded | Filed | Source |
|---|---|---|---|---|---|---|---|---|---|
| RKevin Hern | WAT | Waters Corporation Common Stock (WAT) | Sell | Joint | $1,001 - $15,000 | -15.4% | Aug 13, 2026 | Sep 1, 202619d | Filing |
| RTommy Tuberville | WAT | Waters Corporation Common Stock | SellRestated | Joint | $1,001 - $15,000 | -18.0% | May 3, 2024 | Aug 5, 2026824d | Filing |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Partial | Dependent | $1,001 - $15,000 | -22.0% | Jun 2, 2026 | Jul 6, 202634d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Buy | Spouse | $1,001 - $15,000 | +22.6% | May 15, 2026 | Jun 9, 202625d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Buy | Spouse | $1,001 - $15,000 | +31.0% | Apr 24, 2026 | May 11, 202617d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Buy | Spouse | $1,001 - $15,000 | +31.0% | Apr 13, 2026 | May 11, 202628d | FilingOCR |
| RThomas H. Kean, Jr. | WAT | Waters Corporation Common Stock (WAT) | Partial | Self | $1,001 - $15,000 | -32.7% | Mar 10, 2026 | Apr 13, 202634d | Filing |
| DGilbert Ray Cisneros, Jr. | WAT | Waters Corporation Common Stock (WAT) | Buy | Self | $1,001 - $15,000 | +36.2% | Mar 18, 2026 | Apr 7, 202620d | Filing |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Sell | Spouse | $15,001 - $50,000 | -36.2% | Mar 10, 2026 | Apr 7, 202628d | FilingOCR |
| RThomas H. Kean, Jr. | WAT | Waters Corporation Common Stock (WAT) | Partial | Self | $1,001 - $15,000 | -42.7% | Feb 13, 2026 | Mar 18, 202633d | Filing |
| RKevin Hern | WAT | Waters Corporation Common Stock (WAT) | Exchange | Joint | $1,001 - $15,000 | — | Feb 9, 2026 | Mar 6, 202625d | Filing |
| DDebbie Dingell | WAT | Waters Corporation Common Stock (WAT) | Exchange | Self | $1,001 - $15,000 | — | Feb 10, 2026 | Feb 23, 202613d | Filing |
| RJulia Letlow | WAT | Waters Corporation Common Stock (WAT) | Buy | Self | $1,001 - $15,000 | +9.3% | Dec 8, 2025 | Jan 13, 202636d | Filing |
| RJulia Letlow | WAT | Waters Corporation Common Stock (WAT) | Sell | Self | $1,001 - $15,000 | -9.3% | Nov 19, 2024 | Jan 13, 2026420d | Filing |
| RJulia Letlow | WAT | Waters Corporation Common Stock (WAT) | Buy | Self | $1,001 - $15,000 | +9.3% | Oct 23, 2024 | Jan 13, 2026447d | Filing |
| DGilbert Ray Cisneros, Jr. | WAT | Waters Corporation Common Stock (WAT) | Buy | Self | $1,001 - $15,000 | +24.6% | Sep 30, 2025 | Oct 10, 202510d | Filing |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Buy | Dependent | $1,001 - $15,000 | +28.4% | Sep 29, 2025 | Oct 3, 20254d | FilingOCR |
| DGilbert Ray Cisneros, Jr. | WAT | Waters Corporation Common Stock (WAT) | Buy | Self | $1,001 - $15,000 | +41.9% | Aug 26, 2025 | Sep 12, 202517d | Filing |
| DGilbert Ray Cisneros, Jr. | WAT | Waters Corporation Common Stock (WAT) | Buy | Self | $1,001 - $15,000 | +41.9% | Aug 13, 2025 | Sep 12, 202530d | Filing |
| DGilbert Ray Cisneros, Jr. | WAT | Waters Corporation Common Stock (WAT) | Buy | Self | $1,001 - $15,000 | +41.9% | Aug 12, 2025 | Sep 12, 202531d | Filing |
| RLisa C. McClain | WAT | Waters Corporation Common Stock (WAT) | Sell | Spouse | $1,001 - $15,000 | -39.0% | Jul 22, 2025 | Aug 13, 202522d | Filing |
| RLisa C. McClain | WAT | Waters Corporation Common Stock (WAT) | Buy | Spouse | $1,001 - $15,000 | +39.0% | Jul 16, 2025 | Aug 13, 202528d | Filing |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | SellReview | Spouse | — | -47.0% | Jul 1, 2025 | Aug 7, 202537d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Sell | Dependent | $1,001 - $15,000 | -12.3% | Jun 23, 2025 | Jul 9, 202516d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON SToCK | Buy | Spouse | $1,001 - $15,000 | +8.0% | May 28, 2025 | Jun 10, 202513d | FilingOCR |
| RRobert P. Bresnahan, Jr. | WAT | Waters Corporation Common Stock (WAT) | Buy | Self | $1,001 - $15,000 | +7.8% | May 15, 2025 | Jun 9, 202525d | Filing |
| RRobert P. Bresnahan, Jr. | WAT | Waters Corporation Common Stock (WAT) | Sell | Self | $1,001 - $15,000 | +0.6% | Apr 8, 2025 | May 8, 202530d | Filing |
| RRobert P. Bresnahan, Jr. | WAT | Waters Corporation Common Stock (WAT) | Buy | Self | $1,001 - $15,000 | -7.0% | Feb 25, 2025 | Mar 27, 202530d | Filing |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Sell | Spouse | $1,001 - $15,000 | +10.7% | Feb 19, 2025 | Mar 6, 202515d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Buy | Spouse | $1,001 - $15,000 | -10.6% | Jan 17, 2025 | Feb 6, 202520d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Buy | Dependent | $1,001 - $15,000 | -2.0% | Nov 15, 2024 | Dec 5, 202420d | FilingOCR |
| RByron Donalds | WAT | Waters Corp (WAT) | SellReview | Spouse | $1,001 - $15,000 | +4.7% | Feb 24, 2023 | Nov 8, 2024623d | FilingOCR |
| RByron Donalds | WAT | Waters Corp (WAT) | UnknownReview | Self | $1,001 - $15,000 | — | Feb 24, 2023 | Nov 8, 2024623d | FilingOCR |
| RByron Donalds | WAT | Waters Corp (WAT) | BuyReview | Spouse | $1,001 - $15,000 | -4.7% | Aug 12, 2022 | Nov 8, 2024819d | FilingOCR |
| RByron Donalds | WAT | Waters Corp (WAT) | UnknownReview | Self | $1,001 - $15,000 | — | Aug 12, 2022 | Nov 8, 2024819d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Buy | Spouse | $1,001 - $15,000 | +2.1% | Aug 2, 2024 | Sep 6, 202435d | FilingOCR |
| RTommy Tuberville | WAT | Waters Corporation Common Stock | Sell | Joint | $1,001 - $15,000 | -18.6% | May 3, 2024 | Jun 14, 202442d | Filing |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Sell | Dependent | $1,001 - $15,000 | +4.7% | Nov 3, 2023 | Dec 6, 202333d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON SToCK | Sell | Spouse | $1,001 - $15,000 | -9.5% | Oct 31, 2023 | Nov 8, 20238d | FilingOCR |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Buy | Dependent | $1,001 - $15,000 | +9.5% | Oct 2, 2023 | Nov 8, 202337d | FilingOCR |
| DLois Frankel | WAT | Waters Corporation (WAT) | Sell | Self | $1,001 - $15,000 | +0.1% | Sep 8, 2023 | Oct 10, 202332d | Filing |
| DRo Khanna | WAT | WATERS CORPORATION COMMON STOCK | Sell | Dependent | $1,001 - $15,000 | -6.3% | Jun 26, 2023 | Jul 11, 202315d | FilingOCR |
| DRo Khanna | WAT | WATERS·CORPORATION COMMON STOCK | Buy | Spouse | $1,001 - $15,000 | -24.9% | Nov 9, 2021 | Dec 7, 202128d | FilingOCR |
| DLois Frankel | WAT | Waters Corporation (WAT) | Partial | Self | $1,001 - $15,000 | +53.8% | Aug 4, 2021 | Aug 18, 202114d | Filing |
| RTommy Tuberville | WAT | Waters Corporation | Buy | Joint | $1,001 - $15,000 | -48.8% | Mar 29, 2021 | Jul 23, 2021116d | Filing |
Insider activity Filed
Insiders
14
Laboratory Analytical Instruments
Open-market buys · 90d
0
$0 bought
Open-market sells · 90d
0
$0 sold
Net · 90d
$0
-$991.9K net over 12 months · last Sep 30, 2026
| Date | Insider | Kind | Security | Shares | Price | Value | Post-holdings | D/I | 10b5-1 | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| Sep 30, 2026filed Oct 2, 2026 | Heather Knight | Award | Common Stock | 57.41 | $0.00 | $0 | 1,337.95 | D | — | 4 |
| Sep 30, 2026filed Oct 2, 2026 | Wei Jiang | Award | Common Stock | 57.41 | $0.00 | $0 | 3,630.16 | D | — | 4 |
| Aug 6, 2026filed Aug 7, 2026 | Christopher A Kuebler | Exercise | Stock Option (Right to Buy)deriv. | −3,626 | $0.00 | — | 0 | D | — | 4 |
| Aug 6, 2026filed Aug 7, 2026 | Christopher A Kuebler | Sale | Common Stock | −3,626 | $397.94 | $1,442,930 | 17,808 | D | — | 4 |
| Aug 6, 2026filed Aug 7, 2026 | Christopher A Kuebler | Exercise | Common Stock | 3,626 | $136.43 | $494,695 | 21,434 | D | — | 4 |
| Jun 30, 2026filed Jul 2, 2026 | Heather Knight | Award | Common Stock | 63.03 | $0.00 | $0 | 1,280.54 | D | — | 4 |
| Jun 30, 2026filed Jul 2, 2026 | Wei Jiang | Award | Common Stock | 67.42 | $0.00 | $0 | 3,572.75 | D | — | 4 |
| Jun 24, 2026filed Jun 25, 2026 | Robert L Carpio IIISVP Waters Analytical Sciences | Withholding | Common Stock | −189 | $369.18 | $69,775 | 3,426 | D | — | 4 |
| May 12, 2026filed May 14, 2026 | Amol ChaubalSVP & Chief Financial Officer | Withholding | Common Stock | −239 | $352.21 | $84,178 | 7,622.84 | D | — | 4 |
| Apr 6, 2026filed Apr 7, 2026 | Jianqing BennettSVP Waters Adv. Diagnostics | Withholding | Common Stock | −302 | $304.09 | $91,835 | 6,532 | D | — | 4 |
Shares, prices and post-transaction holdings are exactly as reported on SEC Form 4. Net figures count open-market buys minus open-market sales only (awards, exercises, withholding and gifts are excluded).
Unusual activity Estimated
- 42Hindsight movePublic Jun 8, 2026 · traded Apr 24, 2026
WAT rose 17% in the 30 trading days after Rep. Ro Khanna's spouse's buy (hindsight)
Details
- Politician
- Ro Khanna
- Ticker
- WAT
- Asset
- WATERS CORPORATION COMMON STOCK
- Tx type
- buy
- Traded
- Apr 24, 2026
- Filed
- May 11, 2026
- Amount low
- $1,001
- Amount high
- $15,000
- Range midpoint (estimate)
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 17
- Owner type
- spouse
- Is whale
- No
- Entry date
- Apr 24, 2026
- Entry close
- 309.87
- Exit date
- Jun 8, 2026
- Exit close
- 363.34
- Forward return
- +17.3%
- Sign adjusted return
- +17.3%
- N trading days
- 30
- Hindsight
- Yes
- Measured from
- trade date
- Public from
- Jun 8, 2026
- Method version
- 2026-11-03
- 54Hindsight movePublic Nov 11, 2025 · traded Sep 30, 2025
WAT rose 29% in the 30 trading days after Rep. Gilbert Ray Cisneros, Jr.'s buy (hindsight)
Details
- Politician
- Gilbert Ray Cisneros, Jr.
- Ticker
- WAT
- Asset
- Waters Corporation Common Stock (WAT)
- Tx type
- buy
- Traded
- Sep 30, 2025
- Filed
- Oct 10, 2025
- Amount low
- $1,001
- Amount high
- $15,000
- Range midpoint (estimate)
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 10
- Owner type
- self
- Is whale
- No
- Entry date
- Sep 30, 2025
- Entry close
- 299.81
- Exit date
- Nov 11, 2025
- Exit close
- 386.14
- Forward return
- +28.8%
- Sign adjusted return
- +28.8%
- N trading days
- 30
- Hindsight
- Yes
- Measured from
- trade date
- Public from
- Nov 11, 2025
- Method version
- 2026-11-03
- 55Hindsight movePublic Nov 10, 2025 · traded Sep 29, 2025
WAT rose 30% in the 30 trading days after Rep. Ro Khanna's dependent child's buy (hindsight)
Details
- Politician
- Ro Khanna
- Ticker
- WAT
- Asset
- WATERS CORPORATION COMMON STOCK
- Tx type
- buy
- Traded
- Sep 29, 2025
- Filed
- Oct 3, 2025
- Amount low
- $1,001
- Amount high
- $15,000
- Range midpoint (estimate)
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 4
- Owner type
- dependent
- Is whale
- No
- Entry date
- Sep 29, 2025
- Entry close
- 289.43
- Exit date
- Nov 10, 2025
- Exit close
- 376.57
- Forward return
- +30.1%
- Sign adjusted return
- +30.1%
- N trading days
- 30
- Hindsight
- Yes
- Measured from
- trade date
- Public from
- Nov 10, 2025
- Method version
- 2026-11-03
- 43Hindsight movePublic Aug 5, 2025 · traded Jun 23, 2025
WAT fell 18% in the 30 trading days after Rep. Ro Khanna's dependent child's sale (hindsight)
Details
- Politician
- Ro Khanna
- Ticker
- WAT
- Asset
- WATERS CORPORATION COMMON STOCK
- Tx type
- sell
- Traded
- Jun 23, 2025
- Filed
- Jul 9, 2025
- Amount low
- $1,001
- Amount high
- $15,000
- Range midpoint (estimate)
- $8,001
- Disclosed range
- $1,001 - $15,000
- Reporting lag days
- 16
- Owner type
- dependent
- Is whale
- No
- Entry date
- Jun 23, 2025
- Entry close
- 342.83
- Exit date
- Aug 5, 2025
- Exit close
- 281.19
- Forward return
- -18.0%
- Sign adjusted return
- +18.0%
- N trading days
- 30
- Hindsight
- Yes
- Measured from
- trade date
- Public from
- Aug 5, 2025
- Method version
- 2026-11-03