About 4.9% overall. As a group they ended with more shares than they started with. The biggest individual seller, Christopher Kuebler, sold shares equal to 24% of starting holdings, but more shares were added, so the stake grew.
No officer or director trades were reported for the past 30 days. The most recent before that:
| Who | Shares | Price | % of total stake | Total stake after | Trade date | Filed |
|---|---|---|---|---|---|---|
| Christopher Kuebler Director | 3,626 | $397.94 | 17% | 18K | Aug 6, 2026 | Aug 7, 2026 |
"% of total stake" is the shares in this event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings don't reconcile, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.
Percentages cover all 14 officers and directors. Disclosed company stock is not an insider's whole wealth.
Officers and directors, past 12 months. Each bar is the insider's vested stake at the start of the period (Oct 8, 2025). The gold part is what they sold.
Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.
No. Udit Batra reported no open-market sales in the past 12 months.
Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 0% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 100% had no disclosed plan. A trading plan schedules sales in advance.
Yes. 2 officers or directors reported 2 purchases in the past 12 months (Form 4 code P, which includes private purchases).
About 4.9% overall. As a group they ended with more shares than they started with. The biggest individual seller, Christopher Kuebler, sold shares equal to 24% of starting holdings, but more shares were added, so the stake grew. That covers the 12 months to Oct 8, 2026 and counts vested shares reported on SEC Forms 3, 4 and 5, which is not an insider's whole wealth.
| Who sold | Amount | % of holdings | Trading plan |
|---|---|---|---|
| Christopher Kuebler Director | $1.4M 3.6K shares | 24% | No plan disclosed |
Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.
| Insider | Held Oct 8, 2025 | Sold | Held Oct 8, 2026 | Still held | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Udit BatraiIncludes unvested RSUs, amount not disclosed. President and CEO, Director | 25K | 0 | 33K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Udit Batra0shares vested or exercised 0gifted (net of own trusts) −3.6Kwithheld by the company for taxes none reportedunvested awards, start → end
Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
| Christopher Kuebler Director | 15K | −3.6K | 18K | +18% | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Christopher Kuebler+7.4Kshares vested or exercised 0gifted (net of own trusts) −1.3Kwithheld by the company for taxes none reportedunvested awards, start → end Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
Amol ChaubaliMinor difference of 65 shares. Small increase from an employee stock purchase plan. Includes unvested RSUs, amount not disclosed. Small increase from an employee stock purchase plan. SVP & Chief Financial Officer | 5.4K | 0 | 7.8K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Amol Chaubal0shares vested or exercised 0gifted (net of own trusts) −1Kwithheld by the company for taxes none reportedunvested awards, start → end
Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. Reconciliation: minor difference of 65 shares. Small increase from an employee stock purchase plan. | ||||||||||||||||||||||||||||||||
Jianqing BennettiIncludes unvested RSUs, amount not disclosed. SVP Waters Adv. Diagnostics | 4.9K | 0 | 6.5K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Jianqing Bennett0shares vested or exercised 0gifted (net of own trusts) −755withheld by the company for taxes none reportedunvested awards, start → end
Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
| Flemming Ornskov Director | 4.6K | 0 | 5.3K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Flemming Ornskov0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
| Mark Vergnano Director | 4.2K | 0 | 4.5K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Mark Vergnano0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
| Pearl Huang Director | 2.9K | 0 | 3.3K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Pearl Huang0shares vested or exercised 0gifted (net of own trusts) 174 → 174unvested awards, start → end Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
Robert Carpio IIIiIncludes unvested RSUs, amount not disclosed. SVP Waters Analytical Sciences | 2.7K | 0 | 3.4K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Robert Carpio III0shares vested or exercised 0gifted (net of own trusts) −227withheld by the company for taxes none reportedunvested awards, start → end
Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
| Linda Baddour Director | 2.6K | 0 | 2.9K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Linda Baddour0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
| Wei Jiang Director | 2.6K | 0 | 3.6K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Wei Jiang0shares vested or exercised 0gifted (net of own trusts) 153 → 153unvested awards, start → end Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
| Richard Fearon Director | 2K | 0 | 3.3K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Richard Fearon0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
| Daniel Brennan Director | 1K | 0 | 1.4K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Daniel Brennan0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
| Heather Knight Director | 759 | 0 | 1.3K | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Heather Knight0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
Claire FraseriStarted reporting during the period; starting holdings are from the Form 3. Director | 131 | 0 | 489 | no sales | ||||||||||||||||||||||||||||
Vesting, gifts, unvested awards and holding lines for Claire Fraser0shares vested or exercised 0gifted (net of own trusts) none reportedunvested awards, start → end
Stock options (not counted as shares):
Estimate: options held × ($397.94 − strike price), using the most recent insider trade price on Form 4 (Aug 6, 2026), not a market close. | ||||||||||||||||||||||||||||||||
14 of 14 insiders fully reconciled: starting holdings plus reported transactions match ending holdings (13 exactly, 1 with a minor or footnoted difference). Percentages cover all 14 officers and directors. "Still held" compares ending with starting vested shares; a plus sign means the holding grew.
Officer and director open-market sales: $1.4M across 3,626 shares. Plan status and stated purpose are separate questions, and a sale can have both.
Sales with no 10b5-1 plan and no tax reference in the filing. $1.4M of it is Christopher Kuebler. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Christopher Kuebler, Aug 6, 2026
6,941 shares ($2.3M) were withheld by the company for taxes, which isn't a market sale.
2 officers and directors bought shares in this period, in 2 trades(Form 4 code P). Across all their filings on record there are 4 purchase trades.
| Seller | Shares sold | Proceeds | Under a disclosed plan | Share of total | Sales dates |
|---|---|---|---|---|---|
| Christopher Kuebler Director | 3.6K | $1.4M | 0% | 100% | Aug 6, 2026 to Aug 6, 2026 |
| Month | Sale proceeds | Disclosed plan | To cover taxes | No plan disclosed |
|---|---|---|---|---|
| Oct 2025 | $0 | $0 | $0 | $0 |
| Nov 2025 | $0 | $0 | $0 | $0 |
| Dec 2025 | $0 | $0 | $0 | $0 |
| Jan 2026 | $0 | $0 | $0 | $0 |
| Feb 2026 | $0 | $0 | $0 | $0 |
| Mar 2026 | $0 | $0 | $0 | $0 |
| Apr 2026 | $0 | $0 | $0 | $0 |
| May 2026 | $0 | $0 | $0 | $0 |
| Jun 2026 | $0 | $0 | $0 | $0 |
| Jul 2026 | $0 | $0 | $0 | $0 |
| Aug 2026 | $1.4M | $0 | $0 | $1.4M |
| Sep 2026 | $0 | $0 | $0 | $0 |
| Oct 2026 | $0 | $0 | $0 | $0 |
Less than usual: about a quarter of the 5-year average. 1 insider sold; the average is 3 a year.
| 12 months ending | Shares sold | Insiders who sold | Proceeds |
|---|---|---|---|
| Oct 8, 2026 Latest 12 months | 3.6K | 1 | $1.4M |
| Oct 8, 2025 1 year earlier | 0 | 0 | $0 |
| Oct 8, 2024 2 years earlier | 4.5K | 2 | $1.6M |
| Oct 9, 2023 3 years earlier | 5.1K | 2 | $1.5M |
| Oct 9, 2022 4 years earlier | 14K | 3 | $4.7M |
| Oct 9, 2021 5 years earlier | 51K | 8 | $15.2M |
Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.
Every officer and director reconciles for this period.
Amol Chaubal: minor difference of 65 shares. Small increase from an employee stock purchase plan.
Inferred rename: "Family Charitable Trust" is treated as the same holder as "Family Foundation", because the old name was never reported again and the new one opened with the same balance (7,950 shares). Old name, new name
External context: we only cite outside events when a documented connection exists. None is shown for this period.
All 1,248 Forms 3, 4 and 5 filed for Waters Corporation (SEC CIK 1000697) from Sep 11, 2002 to Oct 2, 2026, retrieved from SEC EDGAR on Oct 8, 2026. Prices are the ones reported in each filing, often weighted averages. 41 older filings exist only on paper and could not be read.
Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.
Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".