Position in WAT
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$305,316,471
+$171,612,513 QoQ
Shares Held
1,025,240
+191.3% QoQ
Ownership
1.04%
of shares outstanding
% of Portfolio
0.27%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 99.77761304670126.ToString("F0")%
Shared 0.ToString("F0")%
None 0.2223869532987398.ToString("F0")%
Common Shares in WAT Over Time
Shares Held
Position Value (USD)
Derivatives in WAT
reported options exposure · as of Dec 31, 2023CallValue
$3,292,300
CallShares
10,000
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Diagnostics & Research
Healthcare · as of Mar 31, 2026D. E. Shaw & Co., Inc. holds $1,676,976,764 across 27 Diagnostics & Research names. WAT ranks #1 (18.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | WAT |
Waters Corp /De/
This page
|
1,025,240 | $305,316,471 | |
| 2 | DHR |
Danaher Corp /De/
|
1,428,248 | $270,795,820 | |
| 3 | MEDP |
Medpace Holdings, Inc.
|
432,602 | $207,731,153 | |
| 4 | A |
Agilent Technologies, Inc.
|
1,695,923 | $193,301,303 | |
| 5 | TMO |
Thermo Fisher Scientific Inc.
|
302,848 | $148,858,876 | |
| 6 | ICLR |
Icon PLC
|
1,198,555 | $132,632,096 | |
| 7 | NTRA |
Natera, Inc.
|
491,336 | $98,262,286 | |
| 8 | MTD |
Mettler Toledo International Inc/
|
73,125 | $92,225,250 |
All Filings in WAT
Export CSV
31 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $305,316,471 | 1,025,240 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $133,703,958 | 352,010 | Shares | Defined | 2026-02-17 | |
| 2025-09-30 | $87,499,248 | 291,849 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $398,952 | 1,143 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $1,309,897 | 3,554 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $3,542,858 | 9,550 | Shares | Defined | 2025-02-14 | |
| 2024-09-30 | $1,763,101 | 4,899 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $1,548,950 | 5,339 | Shares | Defined | 2024-08-14 | |
| 2024-03-31 | $5,110,438 | 14,846 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $3,292,300 | 10,000 | Call | Defined | 2024-02-14 | |
| 2023-12-31 | $3,504,982 | 10,646 | Shares | Defined | 2024-02-14 | |
| 2023-09-30 | $8,407,278 | 30,660 | Shares | Defined | 2023-11-14 | |
| 2023-09-30 | $2,742,100 | 10,000 | Call | Defined | 2023-11-14 | |
| 2023-06-30 | $14,067,981 | 52,780 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $40,838,648 | 131,895 | Shares | Defined | 2023-05-15 | |
| 2023-03-31 | $3,096,300 | 10,000 | Put | Defined | 2023-05-15 | |
| 2022-12-31 | $3,425,800 | 10,000 | Put | Defined | 2023-02-14 | |
| 2022-12-31 | $21,094,363 | 61,575 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $6,646,070 | 24,658 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $18,407,783 | 55,616 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $30,331,621 | 97,721 | Shares | Defined | 2022-05-16 | |
| 2021-12-31 | $49,969,758 | 134,111 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $5,573,880 | 15,600 | Call | Defined | 2021-11-15 | |
| 2021-09-30 | $77,666,657 | 217,371 | Shares | Defined | 2021-11-15 | |
| 2021-06-30 | $552,976 | 1,600 | Call | Defined | 2021-08-16 | |
| 2021-06-30 | $100,101,097 | 289,636 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 | $116,042,239 | 408,355 | Shares | Defined | 2021-05-17 | |
| 2020-12-31 | $122,564,445 | 495,370 | Shares | Defined | 2021-02-16 | |
| 2020-09-30 | $132,601,769 | 677,646 | Shares | Defined | 2020-11-16 | |
| 2020-06-30 | $83,620,631 | 463,529 | Shares | Defined | 2020-08-14 | |
| 2020-03-31 | $23,717,109 | 130,278 | Shares | Defined | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||