Which superinvestors hold Idexx Labs Inc (IDXX)?

Per the latest SEC 13F filings, 5 superinvestors hold Idexx Labs Inc (IDXX): Terry Smith, Polen Capital, Wallace Weitz, Ray Dalio, Bill Nygren. Combined value held is about $1.24B, with Terry Smith the largest holder.

Idexx Labs Inc

Held by 5 superinvestors (IDXX). Valuation data coming soon.

Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.

TickerIDXX

Holder count5

Total value held$1.24B

Largest holderTerry Smith

External

Ownership overview

Idexx Labs Inc (IDXX) is held by 5 of the superinvestors tracked on Compounder, with a combined $1.24B in reported 13F value. The largest position belongs to Terry Smith, where it makes up 6.4% of the portfolio.

Other notable holders by value include Polen Capital (2.7% of its book), Wallace Weitz (1.4% of its book) and Ray Dalio (0.0% of its book).

Over the latest quarter, 1 of the tracked filers opened a new position in IDXX, 1 added to existing ones, 2 trimmed, and 0 sold out entirely.

Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.

Superinvestors Holding This Security

Investor	Value	Shares	Weight
Terry Smith	$823.6M	1,465,786	6.42%
Polen Capital	$391.0M	695,811	2.70%
Wallace Weitz	$19.8M	35,300	1.38%
Ray Dalio	$5.8M	10,314	0.03%
Bill Nygren	$270,831	482	0.00%

Terry Smith
Value$823.6MShares1,465,786Weight6.42%
Polen Capital
Value$391.0MShares695,811Weight2.70%
Wallace Weitz
Value$19.8MShares35,300Weight1.38%
Ray Dalio
Value$5.8MShares10,314Weight0.03%
Bill Nygren
Value$270,831Shares482Weight0.00%

Stock valuation (intrinsic value / DCF) coming soon.

Sources· SEC EDGAR 13F as of 2026-05-15

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