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Insider tapeFilings through Fri, Oct 2
WAT

Waters Corporation insider trading

Health Care · Net selling
Close · Oct 5, 2026 $440.12 +34.3% over 12 months

Share price and insider trades

WAT closeInsider buyInsider sale
250300350400450NovDecJan 2026FebMarAprMayJunJulAugSepOctBought $144,730 on 2026-03-16 · Wei JiangBought $306,340 on 2026-03-06 · Richard H FearonSold $1,442,930 on 2026-08-06 · Christopher A Kuebler
Bought, 12 months$451K
Sold, 12 months$1.4M
Insiders buying2
Insiders selling1

Valuation, profit and volume

P/E (trailing)n/aSector median 24.5
Market value— 
Profit margin—Revenue growth —
Volume vs. 50-day0.9×Last 5 sessions
Insiders' paper profit+$209KOn all tracked purchases +46.4%

Summary

Over the past 12 months, 2 Waters Corporation insiders reported open-market purchases totaling $451K, while 1 insider reported sales totaling $1.4M. Among insiders with enough purchase history to measure, Richard H Fearon (Director) has the highest Insider Score at 55. 0 of 1 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.

Insider transactions

Open-market purchases and sales. 47 grants, option exercises and tax withholdings are not shown.

Filed Insider Type Shares Price Value Since Score
Aug 7SEC Christopher A KueblerDirector Sell 3,626 $397.94 $1.4M +10.6% —
Mar 18SEC Wei JiangDirector Buy 500 $289.46 $145K +52.0% —
Mar 10SEC Richard H FearonDirector Buy 1,000 $306.34 $306K +43.7% 55

Insiders at Waters Corporation

InsiderBoughtSoldLast filingScore
Christopher A KueblerDirector — $1.4M Aug 7, 2026 —
Richard H FearonDirector $306K — Mar 10, 2026 55
Wei JiangDirector $145K — Oct 2, 2026 —
Heather KnightDirector — — Oct 2, 2026 —
Robert L Carpio IIISvp Waters Analytical Sciences — — Jun 25, 2026 —
Amol ChaubalCFO — — May 14, 2026 —
Jianqing BennettSvp Waters Adv. Diagnostics — — Apr 7, 2026 —
Udit BatraCEO, President — — Mar 3, 2026 —
Flemming OrnskovDirector — — Feb 27, 2026 —
Linda BaddourDirector — — Feb 27, 2026 —
Daniel J. BrennanDirector — — Feb 27, 2026 —
Claire FraserDirector — — Feb 27, 2026 —
Pearl S HuangDirector — — Feb 27, 2026 —
Mark VergnanoDirector — — Feb 27, 2026 —

Insider activity at other Health Care companies

Same sector, ranked by insider buying in the last 90 days.

  • BSXBoston Scientific$9.5M bought
  • PFEPfizer$3.0M bought
  • COOCooper Companies (The)$1.9M bought
  • ELVElevance Health$1.4M bought
  • PODDInsulet Corporation$162K bought
  • SYKStryker Corporation$27K bought

Common questions about WAT insiders

Are Waters Corporation insiders buying WAT stock?

In the past 12 months, 2 insiders reported open-market purchases of WAT worth $451K. The latest was Director Wei Jiang bought $145K of WAT at $289.46 — first open-market purchase in our records.

Are Waters Corporation insiders selling WAT stock?

1 insiders reported sales worth $1.4M over the same period.

Where does this data come from?

Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.