Parnassus Investments
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Parnassus Investments’s Idexx Laboratories IDXX Stock Holding History

Parnassus Investments’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
Q2 		$15.5M Sell
29,386
-3,323
-10% -$1.86M 0.04% 115
2026
Q1 		$18.4M Sell
32,709
-942
-3% -$604K 0.05% 102
2025
Q4 		$22.8M Buy
33,651
+774
+2% +$527K 0.06% 104
2025
Q3 		$21M Sell
32,877
-360
-1% -$219K 0.05% 114
2025
Q2 		$17.8M Sell
33,237
-3,416
-9% -$1.63M 0.04% 112
2025
Q1 		$15.4M Sell
36,653
-11,694
-24% -$5.08M 0.04% 115
2024
Q4 		$20M Sell
48,347
-636
-1% -$279K 0.04% 107
2024
Q3 		$24.7M Hold
48,983
– – 0.05% 102
2024
Q2 		$23.9M Hold
48,983
– – 0.05% 103
2024
Q1 		$26.4M Hold
48,983
– – 0.06% 107
2023
Q4 		$27.2M Hold
48,983
– – 0.06% 99
2023
Q3 		$21.4M Hold
48,983
– – 0.05% 104
2023
Q2 		$24.6M Hold
48,983
– – 0.06% 101
2023
Q1 		$24.5M Sell
48,983
-13,412
-21% -$6.42M 0.06% 101
2022
Q4 		$25.5M Hold
62,395
– – 0.06% 104
2022
Q3 		$20.3M Hold
62,395
– – 0.05% 107
2022
Q2 		$21.9M Hold
62,395
– – 0.05% 109
2022
Q1 		$34.1M Hold
62,395
– – 0.07% 108
2021
Q4 		$41.1M Hold
62,395
– – 0.08% 104
2021
Q3 		$38.8M Sell
62,395
-8,873
-12% -$5.96M 0.08% 104
2021
Q2 		$45M Hold
71,268
– – 0.1% 100
2021
Q1 		$34.9M Hold
71,268
– – 0.08% 101
2020
Q4 		$35.6M Hold
71,268
– – 0.1% 88
2020
Q3 		$28M Sell
71,268
-1,633
-2% -$604K 0.09% 87
2020
Q2 		$24.1M Hold
72,901
– – 0.08% 91
2020
Q1 		$17.7M Buy
+72,901
New +$19M 0.07% 93

Other funds holding IDXX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
BAMCO Inc
BAMCO Inc New York $66.6B AUM 7.35% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return

Parnassus Investments's IDXX Position: Q2 2026 in Review

Parnassus Investments reduced its Idexx Laboratories (IDXX) stake by 10% in Q2 2026, selling an estimated $1.86M and leaving 29,386 shares worth $15.5M. The position accounts for 0.04% of the portfolio, ranked #115.

Parnassus Investments first reported a position in IDXX in Q1 2020 and has held it in 26 quarters since. The position peaked at $45M in Q2 2021. 1,300 funds tracked by Wall St. Rank hold IDXX as of Q2 2026.

  • Parnassus Investments held 29,386 shares of Idexx Laboratories worth $15.5M as of Q2 2026.
  • Parnassus Investments sold 3,323 Idexx Laboratories shares in Q2 2026, an estimated $1.86M.
  • Idexx Laboratories made up 0.04% of Parnassus Investments's portfolio in Q2 2026, its #115 holding.
  • Parnassus Investments first reported a position in Idexx Laboratories in Q1 2020 and has held it in 26 quarters since.
  • Parnassus Investments's Idexx Laboratories position peaked at $45M in Q2 2021.
  • 1,300 funds tracked by Wall St. Rank held Idexx Laboratories as of Q2 2026.

Based on Parnassus Investments's 13F filing for Q2 2026, filed 29 Jul 2026.