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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 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
34
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 14 listed it in both
Shares listed
20,385,225
combined, among listed positions
Reported value
$6.9bn
combined, at the quarter end

1 line marked †. Value as filed implies a price far from other filers'. Each counts in holders and value as filed, and is left out of the net change in shares.

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 27 buyers (opened or added shares) and 9 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +7,062,917.

Managers listing WAT in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

34 of 34 holders

ActionFiling
MFS Investment Management† Value as filed implies a price far from other filers'.4,630,118$2.1bn0.69%Added+2,005,40314 May 2026 (the filing on sec.gov)
AllianceBernstein LP2,116,737$804m0.26%Added+49,83915 May 2026 (the filing on sec.gov)
Invesco Ltd2,168,285$646m0.06%Added+1,001,06912 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd1,638,772$488m0.23%Added+348,37918 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC1,575,187$469m0.80%Newnew14 May 2026 (the filing on sec.gov)
Viking Global Investors LP1,256,462$374m1.05%Newnew15 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc1,124,028$335munder 0.1%Added+452,92515 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,025,240$305m0.18%Added+673,23015 May 2026 (the filing on sec.gov)
Holocene Advisors LP917,066$273m0.66%Added+505,35615 May 2026 (the filing on sec.gov)
Wellington Management Group LLP811,326$242munder 0.1%Added+538,60415 May 2026 (the filing on sec.gov)
Artisan Partners LP534,576$159m0.26%Added+160,86813 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)502,814$150munder 0.1%Added+342,65815 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC382,948$114m0.09%Added+308,43327 Oct 2026 (the filing on sec.gov)
Point72 Asset Management LP354,375$106m0.14%Added+291,41915 May 2026 (the filing on sec.gov)
Harris Associates LP288,712$86m0.11%Newnew15 May 2026 (the filing on sec.gov)
Marshall Wace LLP226,886$68m0.07%Trimmed-354,17715 May 2026 (the filing on sec.gov)
Citadel Advisors LLC208,503$62munder 0.1%Added+69,01815 May 2026 (the filing on sec.gov)
Millennium Management LLC185,168$55munder 0.1%Trimmed-353,54515 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP148,660$44munder 0.1%Added+99,28514 May 2026 (the filing on sec.gov)
Woodline Partners LP107,910$32m0.12%Added+26,49715 May 2026 (the filing on sec.gov)
AQR Capital Management LLC51,538$15munder 0.1%Added+21,39615 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC32,254$9.6m0.07%Added+11,79115 May 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP30,000$8.9munder 0.1%Newnew13 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP19,691$5.9munder 0.1%Trimmed-1,40415 May 2026 (the filing on sec.gov)
Verition Fund Management LLC19,028$5.7munder 0.1%Added+17,22115 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, 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 (7)

Exited (2)

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 →