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IDXX in the 13F filings

Idexx Labs Inc · CUSIP 45168D104

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Mar 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2025
Managers listing it
17
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q4 2024 and Q1 2025; 12 listed it in both
Shares listed
5,714,618
combined, among listed positions
Reported value
$2.4bn
combined, at the quarter end

Among the 95 comparable managers: 12 buyers (opened or added shares) and 6 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing IDXX in Q1 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

17 of 17 holders

ActionFiling
T. Rowe Price Associates Inc1,988,912$835m0.10%Added+825,96514 May 2025 (the filing on sec.gov)
Invesco Ltd1,166,406$490m0.09%Added+5,41812 May 2025 (the filing on sec.gov)
Capital Research Global Investors667,804$280m0.06%Added+51,80812 May 2025 (the filing on sec.gov)
Neuberger Berman Group LLC415,141$174m0.15%Added+19,36627 Oct 2026 (the filing on sec.gov)
Durable Capital Partners LP364,757$153m1.37%Newnew15 May 2025 (the filing on sec.gov)
D. E. Shaw & Co.238,234$100m0.09%Added+26,09815 May 2025 (the filing on sec.gov)
Arrowstreet Capital LP190,910$80m0.07%Added+48,71814 May 2025 (the filing on sec.gov)
AllianceBernstein LP181,892$76munder 0.1%Trimmed-1,057,32815 May 2025 (the filing on sec.gov)
AQR Capital Management LLC175,785$73m0.07%Added+53,10615 May 2025 (the filing on sec.gov)
Marshall Wace LLP110,549$46m0.06%Trimmed-96,56515 May 2025 (the filing on sec.gov)
Verition Fund Management LLC62,761$26m0.12%Addedn.a.15 May 2025 (the filing on sec.gov)
Voloridge Investment Management LLC50,032$21m0.08%Trimmed-108,47915 May 2025 (the filing on sec.gov)
Man Group PLC45,109$19munder 0.1%Addedn.a.15 May 2025 (the filing on sec.gov)
Tudor Investment Corp38,052$16m0.05%Addedn.a.15 May 2025 (the filing on sec.gov)
Winton Group Ltd8,314$3.5m0.21%Trimmed-7,18615 May 2025 (the filing on sec.gov)
Element Capital Management LLC6,526$2.7m0.68%Newnew13 May 2025 (the filing on sec.gov)
Bridgewater Associates LP3,434$1.4munder 0.1%Trimmed-5,42714 May 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2024 to Q1 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 (2)

Exited (1)

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.
17 in Q3 2024 to 22 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.
IDXX by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20136$1.5bnn.a.n.a.
Q3 20135$1.6bnn.a.n.a.
Q4 20136$1.7bnn.a.n.a.
Q1 20148$1.9bnn.a.n.a.
Q2 20147$2.1bnn.a.n.a.
Q3 201411$1.6bnn.a.n.a.
Q4 201412$1.8bnn.a.n.a.
Q1 201510$1.7bnn.a.n.a.
Q2 201512$1.4bnn.a.n.a.
Q3 201513$1.6bnn.a.n.a.
Q4 20157$1.5bnn.a.n.a.
Q1 20169$1.3bnn.a.n.a.
Q2 201611$886mn.a.n.a.
Q3 201612$1.1bnn.a.n.a.
Q4 201611$943mn.a.n.a.
Q1 201714$1.8bnn.a.n.a.
Q2 201720$1.8bnn.a.n.a.
Q3 201722$1.8bnn.a.n.a.
Q4 201719$1.7bnn.a.n.a.
Q1 201820$2.1bnn.a.n.a.
Q2 201822$2.5bnn.a.n.a.
Q3 201817$2.5bnn.a.n.a.
Q4 201822$1.9bnn.a.n.a.
Q1 201919$2.1bnn.a.n.a.
Q2 201920$2.7bnn.a.n.a.
Q3 201915$2.5bnn.a.n.a.
Q4 201916$2.3bnn.a.n.a.
Q1 202019$2.3bnn.a.n.a.
Q2 202018$3.1bnn.a.n.a.
Q3 202018$2.9bnn.a.n.a.
Q4 202015$3.5bnn.a.n.a.
Q1 202122$3.5bnn.a.n.a.
Q2 202118$4.5bnn.a.n.a.
Q3 202120$4.6bnn.a.n.a.
Q4 202117$4.9bnn.a.n.a.
Q1 202218$4.7bnn.a.n.a.
Q2 202220$3.5bnn.a.n.a.
Q3 202217$2.7bnn.a.n.a.
Q4 202213$3.5bnn.a.n.a.
Q1 202318$4.2bnn.a.n.a.
Q2 202316$3.7bnn.a.n.a.
Q3 202315$3.2bnn.a.n.a.
Q4 202316$4.1bn127
Q1 202417$3.7bn127
Q2 202413$3.7bn86
Q3 202417$3.8bn116
Q4 202422$2.6bn156
Q1 202517$2.4bn126
Q2 202511$2.5bn76
Q3 202510$2.8bn64
Q4 202514$5.1bn1717
Q1 202616$4.7bn2313
Q2 202622$4.9bn2616

Compare with…

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

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

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 IDXX, latest filings →Back to the 13F Explorer →