Ticker
WAT
Waters Corp
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WAT in the last 90 days
Waters Corp (WAT) had 1 congress transaction by 1 member and no insider purchases in filings from the last 90 days.
FINRA’s latest report (settlement 15 SEPT 2026) shows 3,304,268 shares held short, 5.8 days to cover, up 0.3% from the report before.
- Congress: 0 purchases and 1 sale reported, amounts in the bands the law requires.
- Delay: each filing below shows how many days passed between the trade and its publication. None of this is real-time.
Latest filing on file: 01 SEPT 2026 · FINRA settlement 15 SEPT 2026 · public filings, reported as filed
What the price is doing
WAT is up 40%, and short sellers have been backing off.
Bets against it — they pay off if the price falls — are down 11% over the same stretch.
Politician activityBoughtSoldHover a dot for details
Short sellers
11 reports · twice a month
Money betting WAT falls. Reported twice a month, and it shows up seven working days late.
Insiders
Nothing reported
Traded over six months
Quiet Money
Our take on how well WAT holds up when sellers show up.
How it holds up · last 60 trading days
Through 21 SEPT 2026
Mixed
When WAT gets hit lately, it goes both ways.
Lately, WAT holds firm some days and gives way on others.
That's been true for the last 11 trading days.
The last 6 months
What the filings show
What the filings show · last 90 days
2 of 4 sources
-17Tilted out
The disclosed money is leaning away from this name, on what has actually been filed. This reads on two of the four sources we track.
- Short interest
- Short interest fell 9.8% — 3,662,258 to 3,304,268 shares between 15 JUL 2026 and 15 SEPT 2026. See the filings →
- +24
This summarises filings that have already been published — it is not a forecast, a rating of the company, or advice. Every figure above is listed in full further down this page, with the document it came from.
FINRA short interest
Settlement 15 SEPT 2026 · shares held short
3,304,268shares held short
Days to cover
5.78
Avg daily volume
571,765
Since last report
+0.31%
As of 15 September 2026, 3,304,268 Waters Corp shares were held short — the total across every reporting firm, not one fund's position. That is 10,231 shares more than the previous report, a 0.31% increase. At the average daily volume of 571,765 shares, that position represents 5.78 days of trading — what the filing calls days to cover.
This is the most recent figure that exists, and it is 17 days old. FINRA collects short interest twice a month, on a settlement date, and publishes it about eight business days later. So nobody has a live short-interest number for WAT — not us, and not anyone quoting one. We print the settlement date on the figure so you always know which day you are looking at.
Across the 12 reports we hold, the position has fallen from 3,319,229 shares on 31 March 2026 to 3,304,268 today, a change of 0.5%. The highest reading in that window was 4,510,715 shares on 15 June 2026.
| Settlement | Shares short | Days to cover |
|---|---|---|
| 15 SEPT 2026 | 3,304,268 | 5.78 |
| 31 AUG 2026 | 3,294,037 | 4.53 |
| 14 AUG 2026 | 3,635,708 | 3.89 |
| 31 JUL 2026 | 4,166,848 | 4.74 |
| 15 JUL 2026 | 3,662,258 | 5.32 |
| 30 JUN 2026 | 3,702,766 | 3.21 |
| 15 JUN 2026 | 4,510,715 | 5.30 |
| 29 MAY 2026 | 4,475,854 | 4.30 |
| 15 MAY 2026 | 3,938,447 | 2.86 |
| 30 APR 2026 | 3,428,205 | 3.55 |
| 15 APR 2026 | 3,730,912 | 4.59 |
| 31 MAR 2026 | 3,319,229 | 3.07 |
- What is WAT's short interest?
- 3,304,268 shares, as of the 15 September 2026 settlement date. That is the figure FINRA published, unadjusted.
- What percentage of the float is short?
- We do not publish that, because FINRA does not publish float. The regulator reports the number of shares held short; turning it into a percentage needs a share count from somewhere else, and different sources disagree about what counts as float. We would rather give you the number that was actually filed than a percentage built on an assumption.
- How current is this?
- It is 17 days old, and that is as fresh as short interest gets. FINRA measures it twice a month and publishes it seven business days after the settlement date. Any site showing you a "live" short interest figure is showing you something else.
- What does days to cover mean?
- It is the short position divided by average daily trading volume — here, 5.78. It describes how many days of ordinary trading the position is equivalent to. It is arithmetic from the filing, not a prediction about what will happen.
- Where does this come from?
- FINRA's consolidated short interest file, which is public. We read it directly and store it unchanged, except that we blank the days-to-cover placeholder FINRA writes when a stock has almost no volume.
Disclosed insider buying on file
—no purchase on file passed the price check
Open-market purchases only — the amount is a fact, not a verdict.
On file here
Short positions0
Insider purchases0
Congress transactions15
Latest change01 SEPT 2026
Congress transactions on file
15 disclosed · newest first · every row links to its filing
| Who | Amount as filed | Traded | Filed | Lag | |
|---|---|---|---|---|---|
| Hon. Kevin Hern | SOLD | $1,001 – $15,000 | 13 AUG 2026 | 01 SEPT 2026 | 19 days |
| Hon. Thomas H. Kean Jr | SOLD | $1,001 – $15,000 · partial | 10 MAR 2026 | 13 APR 2026 | 34 days |
| Hon. Gilbert Cisneros | BOUGHT | $1,001 – $15,000 | 18 MAR 2026 | 07 APR 2026 | 20 days |
| Hon. Thomas H. Kean Jr | SOLD | $1,001 – $15,000 · partial | 13 FEB 2026 | 18 MAR 2026 | 33 days |
| Hon. Julia Letlow | SOLD | $1,001 – $15,000 | 19 NOV 2024 | 13 JAN 2026 | 420 days — the law says 45 |
| Hon. Julia Letlow | BOUGHT | $1,001 – $15,000 | 08 DEC 2025 | 13 JAN 2026 | 36 days |
| Hon. Julia Letlow | BOUGHT | $1,001 – $15,000 | 23 OCT 2024 | 13 JAN 2026 | 447 days — the law says 45 |
| Hon. Gilbert Cisneros | BOUGHT | $1,001 – $15,000 | 30 SEPT 2025 | 10 OCT 2025 | 10 days |
| Hon. Gilbert Cisneros | BOUGHT | $1,001 – $15,000 | 13 AUG 2025 | 12 SEPT 2025 | 30 days |
| Hon. Gilbert Cisneros | BOUGHT | $1,001 – $15,000 | 12 AUG 2025 | 12 SEPT 2025 | 31 days |
| Hon. Gilbert Cisneros | BOUGHT | $1,001 – $15,000 | 26 AUG 2025 | 12 SEPT 2025 | 17 days |
| Hon. Lisa McClain | BOUGHT | $1,001 – $15,000 | 16 JUL 2025 | 13 AUG 2025 | 28 days |
| Hon. Lisa McClain | SOLD | $1,001 – $15,000 | 22 JUL 2025 | 13 AUG 2025 | 22 days |
| Hon. Rob Bresnahan | SOLD | $1,001 – $15,000 | 08 APR 2025 | 08 MAY 2025 | 30 days |
| Hon. Rob Bresnahan | BOUGHT | $1,001 – $15,000 | 25 FEB 2025 | 27 MAR 2025 | 30 days |