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Ken Griffin's IDEXX Laboratories, Inc. (IDXX) position

Yes: as of Q1 2026, Ken Griffin holds 88K shares of IDXX worth $49M (0.0% of the disclosed portfolio). Held since at least Q1 2021; that opening coverage snapshot is not counted as a purchase.
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Current value
$49M
Shares held
88K
% of portfolio
0.0%
Est. average buy price (i)
$607.58
Quarter-end price
$561.89

Estimated trade prices

Average price in quarters with purchases
$458.72
Average prices in quarters with sales
  • Q4 2025: $681.61 (10K shares sold)
  • Q3 2025: $606.94 (16K shares sold)
  • Q1 2025: $434.21 (77K shares sold)
  • Q3 2024: $485.80 (54K shares sold)
  • Q1 2024: $546.49 (100K shares sold)
  • Q3 2023: $498.67 (58K shares sold)
  • Q2 2023: $479.21 (609K shares sold)
  • Q1 2022: $526.03 (327 shares sold)
  • Q4 2021: $627.75 (46K shares sold)

IDXX price vs Griffin's position

1Y 3Y 5Y MAX
Dates
$200$400$600$80020222023202420252026New position of 48K shares · Q3 2021. Average closing price $671.94 · Price range $621.90–$705.7648KsharespurchasedSold 46K shares (95.6%) · Q4 2021. Average closing price $627.75 · Price range $586.54–$666.4846KsharessoldSold 327 shares (15.6%) · Q1 2022. Average closing price $526.03 · Price range $466.52–$631.01327sharessoldAdded 103K shares (over 1,000%) · Q2 2022. Average closing price $407.78 · Price range $327.37–$553.44103KsharespurchasedAdded 264K shares (253.1%) · Q3 2022. Average closing price $367.34 · Price range $325.80–$407.78264KsharespurchasedAdded 30K shares (8.1%) · Q4 2022. Average closing price $388.17 · Price range $324.64–$441.2730KsharespurchasedAdded 314K shares (78.8%) · Q1 2023. Average closing price $478.56 · Price range $406.01–$514.59314KsharespurchasedSold 609K shares (85.5%) · Q2 2023. Average closing price $479.21 · Price range $450.70–$503.61609KsharessoldSold 58K shares (56.0%) · Q3 2023. Average closing price $498.67 · Price range $432.42–$556.6758KsharessoldAdded 97K shares (213.4%) · Q4 2023. Average closing price $469.47 · Price range $391.37–$557.5697KsharespurchasedSold 100K shares (70.2%) · Q1 2024. Average closing price $546.49 · Price range $515.08–$576.87100KsharessoldAdded 35K shares (83.1%) · Q2 2024. Average closing price $502.03 · Price range $468.04–$548.5335KsharespurchasedSold 54K shares (70.1%) · Q3 2024. Average closing price $485.80 · Price range $455.08–$517.0654KsharessoldAdded 55K shares (237.9%) · Q4 2024. Average closing price $438.63 · Price range $406.92–$495.4255KsharespurchasedSold 77K shares (98.6%) · Q1 2025. Average closing price $434.21 · Price range $406.29–$469.0477KsharessoldAdded 42K shares (over 1,000%) · Q2 2025. Average closing price $478.19 · Price range $361.04–$536.3442KsharespurchasedSold 16K shares (36.4%) · Q3 2025. Average closing price $606.94 · Price range $514.61–$682.7816KsharessoldSold 10K shares (35.3%) · Q4 2025. Average closing price $681.61 · Price range $616.15–$766.6810KsharessoldAdded 70K shares (390.8%) · Q1 2026. Average closing price $640.87 · Price range $557.09–$718.6670Ksharespurchased
Average closing price · filing quarter
$640.87
Price range · filing quarter
$557.09 – $718.66
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Added +70K +$45M +390.8% 88K May 15, 2026
Q4 2025 Reduced −10K −$6.6M −35.3% 18K Feb 17, 2026
Q3 2025 Reduced −16K −$9.6M −36.4% 28K Nov 14, 2025
Q2 2025 Added +42K +$20M +3,946.8% 43K Aug 14, 2025
Q1 2025 Reduced −77K −$33M −98.6% 1K May 15, 2025
Q4 2024 Added +55K +$24M +237.9% 78K Feb 14, 2025
Q3 2024 Reduced −54K −$26M −70.1% 23K Nov 14, 2024
Q2 2024 Added +35K +$18M +83.1% 77K Aug 14, 2024
Q1 2024 Reduced −100K −$54M −70.2% 42K May 15, 2024
Q4 2023 Added +97K +$45M +213.4% 142K Feb 14, 2024
Q3 2023 Reduced −58K −$29M −56.0% 45K Nov 14, 2023
Q2 2023 Reduced −609K −$292M −85.5% 103K Aug 14, 2023
Q1 2023 Added +314K +$150M +78.8% 712K May 15, 2023
Q4 2022 Added +30K +$12M +8.1% 398K Feb 14, 2023
Q3 2022 Added +264K +$97M +253.1% 368K Nov 14, 2022
Q2 2022 Added +103K +$42M +5,776.5% 104K Aug 15, 2022
Q1 2022 Reduced −327 −$172K −15.6% 2K May 16, 2022
Q4 2021 Reduced −46K −$29M −95.6% 2K Feb 14, 2022
Q3 2021 New +48K +$32M – 48K Nov 15, 2021
Q1 2021 First covered – – – 25K May 21, 2021
Data through Q1 2026 · filed May 15, 2026
20 grouped rows from 20 quarters

Who else owns IDXX

Invesco Ltd.

 View investor →
owns 2.1% of shares outstanding
Est. $943M · Shares: 1.7M

Bamco Inc
owns 2.1% of shares outstanding
Est. $918M · Shares: 1.6M

Bank of New York Mellon Corp
owns 1.9% of shares outstanding
Est. $846M · Shares: 1.5M

Fundsmith LLP

 View investor →
owns 1.9% of shares outstanding
Est. $824M · Shares: 1.5M

See all owners of IDXX →

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Taiwan Semiconductor Manufacturing Company Limited(TSM)
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Apple Inc.(AAPL)
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Meta Platforms, Inc.(META)
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Common questions

Does Ken Griffin own IDXX?

Yes. As of Q1 2026, Ken Griffin disclosed 88K shares of IDXX, worth $49M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy IDXX?

Ken Griffin held IDXX since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell IDXX?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in IDXX. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of IDXX does Ken Griffin own?

Ken Griffin disclosed 88K shares of IDXX as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for IDXX?

Ken Griffin's estimated average buy price for IDXX is $607.58, from quarter-average prices weighted by the shares added each quarter. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.