IDXX
IDEXX Laboratories Inc
IDEXX Laboratories Inc historical holders
total: 6
Durable Capital Partners IDEXX Laboratories Inc transactions over time
- Total transactions:
- 14
- New positions:
- 3
- Sold out:
- 3
- Added:
- 3
- Reduced:
- 5
- Held since:
- 2025 Q1
- Held for:
- 1 quarter
- Latest activity:
- 2025 Q2
Henry Ellenbogen has been an institutional investor in IDEXX Laboratories Inc (IDXX) since 2020 Q1. According to 2026 Q1 report, Henry Ellenbogen doesn't hold any shares. The fund/company first acquired IDXX in 2020 Q1, initially purchasing 227,540 shares. Henry Ellenbogen later completely sold out the position and reinvested in IDXX again in 2025 Q1. Since the initial investment, Durable Capital Partners has made 13 more transactions in this position.
When did Henry Ellenbogen exit their IDXX position?
Henry Ellenbogen no longer holds IDEXX Laboratories Inc (IDXX). They sold off their entire position in 2025 Q2, closing out an investment that began in 2020 Q1.
When did Henry Ellenbogen first invest in IDXX?
Henry Ellenbogen first invested in IDEXX Laboratories Inc (IDXX) in 2020 Q1 at the reported quarter-end price of $242.24 per share, acquiring 227,540 shares in their initial purchase.
What is Henry Ellenbogen's average cost basis for IDXX?
Based on historical transaction data, Henry Ellenbogen's estimated cost basis for IDEXX Laboratories Inc (IDXX) is approximately $419.95 per share. This represents their average reported price* across all buy transactions.
Has Henry Ellenbogen reinvested in IDXX after selling?
Yes, Henry Ellenbogen has shown renewed interest in IDEXX Laboratories Inc (IDXX). After completely selling their position, they reinitiated an investment in 2025 Q1, demonstrating continued conviction in this ticker.
Estimated cost basis*
- Weighted AVG buy price:
- $419.95
- Weighted AVG sell price:
- $419.95
IDXX transactions history by Durable Capital Partners
14 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2025 Q2
|
0.00%
|
0
|
$419.95
|
|
-100% (-364,757)
|
-1.37%
|
|
2025 Q1
|
1.37%
|
364,757
|
$419.95
|
$153,179,702
|
new
|
+1.37%
|
|
2023 Q1
|
0.00%
|
0
|
$407.96
|
|
-100% (-208,030)
|
-0.88%
|
|
2022 Q4
|
0.88%
|
208,030
|
$407.96
|
$84,867,919
|
+0.15% (+316)
|
+0%
|
|
2022 Q3
|
0.74%
|
207,714
|
$325.80
|
$67,673,000
|
+83.55% (+94,548)
|
+0.34%
|
|
2022 Q2
|
0.46%
|
113,166
|
$350.73
|
$39,691,000
|
new
|
+0.46%
|
|
2021 Q4
|
0.00%
|
0
|
$621.92
|
|
-100% (-25,402)
|
-0.12%
|
|
2021 Q3
|
0.12%
|
25,402
|
$621.92
|
$15,798,000
|
-78.70% (-93,859)
|
-0.43%
|
|
2021 Q2
|
0.56%
|
119,261
|
$631.55
|
$75,319,000
|
-3.00% (-3,689)
|
-0.02%
|
|
2021 Q1
|
0.51%
|
122,950
|
$489.31
|
$60,161,000
|
-38.51% (-76,996)
|
-0.33%
|
|
2020 Q4
|
0.89%
|
$499.87
|
-47.80% (-183,112)
|
|||
|
2020 Q3
|
1.66%
|
$393.11
|
-15.97% (-72,776)
|
|||
|
2020 Q2
|
1.87%
|
$330.16
|
+100.33% (+228,294)
|
|||
|
2020 Q1
|
1.12%
|
$242.24
|
new
|
|||
* Shares, change to shares, sold shares, shares held after: split-adjusted.
* Reported price: this doesn't represent the actual buy or sell price. It is the split-adjusted price of the security as of the last day of the reported period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
* Estimated cost basis: based on "Reported price*" (not earlier than 2013 Q2). Calculation starts from the latest "new buy" activity to the latest "close out" activity (if any).
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* New buy or own: this means there is no earlier reporting (for us or in general). So we can't know if the actual purchase of the security happened at the reported period or earlier.