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WAT in the 13F filings

Waters Corp · CUSIP 941848103

Sector · Medical devices and instrumentsTheme · Healthcare: biopharma and medtech· L3VLUP-defined
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 9 listed it in both
Shares listed
11,316,905
combined, among listed positions
Reported value
$4.3bn
combined, at the quarter end

Among the 92 comparable managers: 16 buyers (opened or added shares) and 19 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,513,032.

Managers listing WAT in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

29 of 29 holders

ActionFiling
MFS Investment Management2,624,715$997m0.32%Trimmed-64,97822 Jan 2026 (the filing on sec.gov)
AllianceBernstein LP2,066,898$785m0.25%Trimmed-17,54517 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd1,290,393$490m0.22%Trimmed-12,04017 Feb 2026 (the filing on sec.gov)
Invesco Ltd1,167,216$443munder 0.1%Trimmed-305,20319 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc671,103$255munder 0.1%Added+561,04717 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP581,063$221m0.20%Added+547,10913 Feb 2026 (the filing on sec.gov)
Millennium Management LLC538,713$205m0.09%Added+516,09417 Feb 2026 (the filing on sec.gov)
Holocene Advisors LP411,710$156m0.33%Added+103,21917 Feb 2026 (the filing on sec.gov)
Artisan Partners LP373,708$142m0.21%Added+18,80917 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.352,010$134m0.07%Added+60,16117 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP272,722$104munder 0.1%Trimmed-90,81017 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC185,126$70m0.09%Newnew17 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)160,156$61munder 0.1%Added+86,16917 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC139,485$53munder 0.1%Added+89,86417 Feb 2026 (the filing on sec.gov)
Woodline Partners LP81,413$31m0.12%Trimmed-34,05217 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC74,515$28munder 0.1%Trimmed-1,89427 Oct 2026 (the filing on sec.gov)
Point72 Asset Management LP62,956$24munder 0.1%Added+37,07917 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC60,121$23munder 0.1%Added+57,05712 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP49,375$19munder 0.1%Added+30,48913 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC30,142$11munder 0.1%Trimmed-51,22017 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp25,068$9.5munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP21,095$8.0munder 0.1%Trimmed-1,42217 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC20,463$7.8munder 0.1%Trimmed-18,96017 Feb 2026 (the filing on sec.gov)
Man Group PLC18,265$6.9munder 0.1%Trimmed-48,40217 Feb 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP14,248$5.4m0.06%Added+12,72617 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (3)

Exited (6)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
7 in Q3 2024 to 20 in Q2 2026

Tracked managers listing it, at least.

01020302014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
WAT by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201310$1.8bnn.a.n.a.
Q3 20136$1.9bnn.a.n.a.
Q4 20139$1.6bnn.a.n.a.
Q1 20148$1.9bnn.a.n.a.
Q2 201411$1.8bnn.a.n.a.
Q3 201412$1.7bnn.a.n.a.
Q4 201412$2.1bnn.a.n.a.
Q1 20158$2.1bnn.a.n.a.
Q2 201511$2.1bnn.a.n.a.
Q3 20159$2.0bnn.a.n.a.
Q4 201510$2.4bnn.a.n.a.
Q1 201611$2.6bnn.a.n.a.
Q2 201615$2.6bnn.a.n.a.
Q3 201612$2.7bnn.a.n.a.
Q4 201610$1.9bnn.a.n.a.
Q1 201710$2.1bnn.a.n.a.
Q2 201716$3.1bnn.a.n.a.
Q3 201714$2.7bnn.a.n.a.
Q4 201715$3.1bnn.a.n.a.
Q1 201818$2.7bnn.a.n.a.
Q2 201815$2.5bnn.a.n.a.
Q3 201816$2.3bnn.a.n.a.
Q4 201814$2.2bnn.a.n.a.
Q1 201915$2.8bnn.a.n.a.
Q2 201913$2.4bnn.a.n.a.
Q3 201912$2.6bnn.a.n.a.
Q4 201913$2.7bnn.a.n.a.
Q1 202015$2.0bnn.a.n.a.
Q2 202021$1.9bnn.a.n.a.
Q3 202022$1.9bnn.a.n.a.
Q4 202017$2.1bnn.a.n.a.
Q1 202115$2.2bnn.a.n.a.
Q2 202116$2.5bnn.a.n.a.
Q3 202118$2.8bnn.a.n.a.
Q4 202114$3.1bnn.a.n.a.
Q1 202217$2.4bnn.a.n.a.
Q2 202218$2.7bnn.a.n.a.
Q3 202219$2.2bnn.a.n.a.
Q4 202221$2.5bnn.a.n.a.
Q1 202323$2.5bnn.a.n.a.
Q2 202315$2.3bnn.a.n.a.
Q3 202314$2.4bnn.a.n.a.
Q4 20238$2.6bn38
Q1 20248$2.8bn26
Q2 202410$2.1bn73
Q3 20247$2.5bn45
Q4 202410$2.8bn73
Q1 202511$3.1bn83
Q2 202512$3.3bn84
Q3 202512$2.6bn102
Q4 202515$3.9bn1619
Q1 202618$6.6bn279
Q2 202620$9.8bn2114

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

WAT and LLY →WAT and JNJ →WAT and VRTX →Choose a stock to compare with WAT →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own WAT, latest filings →Back to the 13F Explorer →