Position in MASI
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$41,270,464
+$36,558,622 QoQ
Shares Held
232,026
+477.2% QoQ
Ownership
0.443%
of shares outstanding
% of Portfolio
1.51%
of 13F equity value
Holder Rank
#48
of 445 holders
Holding Since
Dec 2023
2 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in MASI Over Time
Shares Held
Position Value (USD)
Derivatives in MASI
reported options exposure · as of Mar 31, 2026CallValue
$4,446,750
CallShares
25,000
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Medical Devices
Healthcare · as of Mar 31, 2026Polar Asset Management Partners Inc. holds $43,569,054 across 2 Medical Devices names. MASI ranks #1 (94.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | MASI |
Masimo Corp
This page
|
232,026 | $41,270,464 | |
| 2 | PEN |
Penumbra Inc
|
7,000 | $2,298,590 |
All Filings in MASI
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4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $41,270,464 | 232,026 | Shares | Sole | 2026-05-15 | |
| 2026-03-31 | $4,446,750 | 25,000 | Call | Sole | 2026-05-15 | |
| 2023-12-31 | $2,848,203 | 24,300 | Call | Sole | 2024-02-14 | |
| 2023-12-31 | $4,711,842 | 40,200 | Shares | Sole | 2024-02-14 | |
| No filing history on record for this holder in this stock. | ||||||