MASI
MASIMO CORP
MASIMO CORP historical holders
total: 6
Durable Capital Partners MASIMO CORP transactions over time
- Total transactions:
- 4
- New positions:
- 1
- Sold out:
- 1
- Added:
- 1
- Reduced:
- 1
- Held since:
- 2025 Q1
- Held for:
- 3 quarters
- Latest activity:
- 2025 Q4
Henry Ellenbogen has been an institutional investor in MASIMO CORP (MASI) since 2025 Q1. According to 2026 Q1 report, Henry Ellenbogen doesn't hold any shares. The fund/company first acquired MASI in 2025 Q1, initially purchasing about 1.13M shares. Since the initial investment, Durable Capital Partners has made 3 more transactions in this position.
When did Henry Ellenbogen exit their MASI position?
Henry Ellenbogen no longer holds MASIMO CORP (MASI). They sold off their entire position in 2025 Q4, closing out an investment that began in 2025 Q1.
When did Henry Ellenbogen first invest in MASI?
Henry Ellenbogen first invested in MASIMO CORP (MASI) in 2025 Q1 at the reported quarter-end price of $166.60 per share, acquiring 1,125,619 shares in their initial purchase.
What is Henry Ellenbogen's average cost basis for MASI?
Based on historical transaction data, Henry Ellenbogen's estimated cost basis for MASIMO CORP (MASI) is approximately $166.65 per share. This represents their average reported price* across all buy transactions.
Estimated cost basis*
- Weighted AVG buy price:
- $166.65
- Weighted AVG sell price:
- $147.55
MASI transactions history by Durable Capital Partners
4 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2025 Q4
|
0.00%
|
0
|
$147.55
|
|
-100% (-620,619)
|
-0.68%
|
|
2025 Q3
|
0.68%
|
620,619
|
$147.55
|
$91,572,333
|
-46.68% (-543,279)
|
-0.61%
|
|
2025 Q2
|
1.48%
|
1,163,898
|
$168.22
|
$195,790,922
|
+3.40% (+38,279)
|
+0.05%
|
|
2025 Q1
|
1.68%
|
1,125,619
|
$166.60
|
$187,528,125
|
new
|
+1.68%
|
* 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.