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Company profile

Waters Corp /de/ Insider Trading

WAT

Every SEC Form 4 insider trading filing for Waters Corp /de/ (WAT) since April 2023: open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?

Exchange
NYSE
Sector
Laboratory Analytical Instruments
CIK
0001000697
Filings
112
Insiders
16
Last filing
2026-08-06
SEC EDGAR ↗Yahoo Finance ↗Finviz ↗Stock Analysis ↗

Activity summary

No insider transactions in the last 30 days. The most recent was on August 6, 2026, when Christopher A Kuebler reported 3,626 shares (Option Exercise). 112 filings from 16 insiders are on record below.

Three year balance

Buy and sell value by quarter, Q4 23 to Q3 26. Waters Corp /de/ insiders are net sellers across the period shown.

PurchasesSales
Q4 23Q1 24Q2 24Q3 24Q4 24$2.5MQ1 25Q2 25Q3 25Q4 25Q1 26Q2 26Q3 26

Bars below the rule are sales, above are purchases. Largest quarter on the chart is $2.5M.

90 day insight

Over the last 90 days, Waters Corp /de/ insiders sold $1.4M across 1 transaction with no open-market purchases.

  • Most active insider: Christopher A Kuebler with 3 transactions totaling $1.9M.
  • Largest single sale: $1.4M by Christopher A Kuebler on Aug 6, 2026.

Activity skews bearish: sales outpace buys.

Insider Transactions

Sourced from SEC EDGAR Form 4 filings. Updated hourly.

DateInsiderCompanyTypeSharesPriceValueReturn
Aug 6, 2026Christopher A KueblerWAT
Option Exercise
3,626$136.43$495K-1.0% 1m
Aug 6, 2026Christopher A KueblerWAT
Sale
3,626$397.94$1.44M-1.0% 1m
Aug 6, 2026Christopher A KueblerWAT
Option Exercise
3,626——-1.0% 1m
Jun 30, 2026Wei JiangWAT
Award
67.42——-1.2% 1m
Jun 30, 2026Heather KnightWAT
Award
63.03——-1.2% 1m

45 more transactions hidden

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Top insiders

By open-market value traded.

Christopher A KueblerDirector1 filing−$1.4M
Richard H FearonDirector1 filing+$306K
Wei JiangDirector1 filing+$145K

Institutional Ownership

Top 13F-HR holders of Waters Corp /de/ as of 2026-06-30

↓ decreasing
Total reported AUM
$11.68B
QoQ change
-52.5%
Reporting period
2026-06-30
#1
State Street Corp
CIK 0000093751
$1.64B
4.4M shares
#2
BlackRock, Inc.
CIK 0002012383
$1.24B
3.3M shares
#3
Massachusetts Financial Services Co /ma/
CIK 0000912938
$1.16B
3.1M shares

Data source: quarterly 13F-HR filings: institutional holders report positions within 45 days of quarter end. Joined with insider activity above: see who's loading up institutionally while insiders are trading. Full 13F-HR API →

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Form4API, StockholmNot affiliated with the SEC or EDGAR. Data sourced from public EDGAR filings. Not investment advice.

Congressional Trading

Disclosed WAT trades under the STOCK Act

Total trades
18
Purchases
10
Sales
6
Gilbert Ray Cisneros, Jr.
Democrat · House · CA
5 buys
0 sells
Robert P. Bresnahan, Jr.
Republican · House · PA
2 buys
1 sell
Julia Letlow
Republican · House · LA
2 buys
1 sell
Thomas H. Kean, Jr.
Republican · House · NJ
0 buys
2 sells
Lisa C. McClain
Republican · House · MI
1 buy
1 sell
See all 7 members who traded WAT →

Sourced from U.S. House Clerk periodic transaction reports (House coverage only). Trade counts reflect disclosed filings only. The STOCK Act allows up to 45 days between a trade and its disclosure, so this reflects recent disclosures, not real-time trading. Full congressional trading API →

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