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Weitz Investment Management’s Idexx Laboratories IDXX Stock Holding History

Weitz Investment Management’s Portfolio IDXX Stock Details IDXX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$19.8M Hold
35,300
– – 1.38% 26
2025
Q4 		$23.9M Sell
35,300
-21,500
-38% -$14.6M 1.42% 26
2025
Q3 		$36.3M Sell
56,800
-3,500
-6% -$2.12M 1.97% 20
2025
Q2 		$32.3M Hold
60,300
– – 1.74% 28
2025
Q1 		$25.3M Buy
+60,300
New +$26.2M 1.35% 29

Other funds holding IDXX

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return
Fundsmith LLP
Fundsmith LLP London, United Kingdom $12.8B AUM 6.9% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Weitz Investment Management's IDXX Position: Q1 2026 in Review

Weitz Investment Management held its Idexx Laboratories (IDXX) position steady in Q1 2026 at 35,300 shares worth $19.8M. The position accounts for 1.38% of the portfolio, ranked #26.

Weitz Investment Management first reported a position in IDXX in Q1 2025 and has held it in 5 quarters since. The position peaked at $36.3M in Q3 2025. 1,311 funds tracked by Wall St. Rank hold IDXX as of Q1 2026.

  • Weitz Investment Management held 35,300 shares of Idexx Laboratories worth $19.8M as of Q1 2026.
  • Weitz Investment Management left its Idexx Laboratories share count unchanged in Q1 2026.
  • Idexx Laboratories made up 1.38% of Weitz Investment Management's portfolio in Q1 2026, its #26 holding.
  • Weitz Investment Management first reported a position in Idexx Laboratories in Q1 2025 and has held it in 5 quarters since.
  • Weitz Investment Management's Idexx Laboratories position peaked at $36.3M in Q3 2025.
  • 1,311 funds tracked by Wall St. Rank held Idexx Laboratories as of Q1 2026.

Based on Weitz Investment Management's 13F filing for Q1 2026, filed 14 May 2026.