Position in GKOS
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$126,360,111
-$55,391,003 QoQ
Shares Held
1,173,696
-27.1% QoQ
Ownership
2.00%
of shares outstanding
% of Portfolio
0.11%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in GKOS Over Time
Shares Held
Position Value (USD)
Derivatives in GKOS
reported options exposure · as of Mar 31, 2026CallValue
$6,459,600
CallShares
60,000
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, 2026MILLENNIUM MANAGEMENT LLC holds $2,438,858,395 across 79 Medical Devices names. GKOS ranks #9 (5.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | PEN |
Penumbra Inc
|
1,098,136 | $360,594,918 | |
| 2 | BSX |
Boston Scientific Corp
|
4,337,804 | $272,197,201 | |
| 3 | IRTC |
iRhythm Holdings, Inc.
|
1,608,014 | $189,777,812 | |
| 4 | MASI |
Masimo Corp
|
988,853 | $175,887,283 | |
| 5 | LIVN |
LivaNova PLC
|
2,438,671 | $155,001,928 | |
| 6 | EW |
Edwards Lifesciences Corp
|
1,796,821 | $143,889,425 | |
| 7 | GMED |
Globus Medical Inc
|
1,643,352 | $141,591,208 | |
| 8 | ABT |
Abbott Laboratories
|
1,323,342 | $135,867,523 |
All Filings in GKOS
Export CSV
48 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $126,360,111 | 1,173,696 | Shares | Sole | 2026-05-15 | |
| 2026-03-31 | $6,459,600 | 60,000 | Call | Sole | 2026-05-15 | |
| 2025-12-31 | $181,751,114 | 1,609,699 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $407,750 | 5,000 | Call | Sole | 2025-11-14 | |
| 2025-09-30 | $74,488,585 | 913,410 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $6,972,075 | 67,500 | Call | Sole | 2025-08-14 | |
| 2025-03-31 | $7,699,593 | 78,232 | Shares | Sole | 2025-05-15 | |
| 2025-03-31 | $7,972,020 | 81,000 | Call | Sole | 2025-05-15 | |
| 2025-03-31 | $2,460,500 | 25,000 | Put | Sole | 2025-05-15 | |
| 2024-12-31 | $299,880 | 2,000 | Call | Sole | 2025-02-14 | |
| 2024-12-31 | $58,959,856 | 393,223 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $651,400 | 5,000 | Call | Sole | 2024-11-14 | |
| 2024-09-30 | $6,644,280 | 51,000 | Put | Sole | 2024-11-14 | |
| 2024-09-30 | $31,557,203 | 242,226 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $5,941,170 | 50,200 | Put | Sole | 2024-08-14 | |
| 2024-06-30 | $151,243,133 | 1,277,931 | Shares | Sole | 2024-08-14 | |
| 2024-06-30 | $1,207,170 | 10,200 | Call | Sole | 2024-08-14 | |
| 2024-03-31 | $10,447,332 | 110,800 | Put | Sole | 2024-05-15 | |
| 2024-03-31 | $125,150,834 | 1,327,297 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $29,904,138 | 376,200 | Put | Sole | 2024-02-14 | |
| 2023-12-31 | $5,929,954 | 74,600 | Call | Sole | 2024-02-14 | |
| 2023-12-31 | $81,344,740 | 1,023,333 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $767,550 | 10,200 | Call | Sole | 2023-11-14 | |
| 2023-09-30 | $82,175,107 | 1,092,028 | Shares | Sole | 2023-11-14 | |
| 2023-09-30 | $6,787,550 | 90,200 | Put | Sole | 2023-11-14 | |
| 2023-06-30 | $5,696,800 | 80,000 | Put | Sole | 2023-08-14 | |
| 2023-06-30 | $3,204,450 | 45,000 | Call | Sole | 2023-08-14 | |
| 2023-06-30 | $103,568,180 | 1,454,405 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $2,004,000 | 40,000 | Put | Sole | 2023-05-15 | |
| 2023-03-31 | $65,032,405 | 1,298,052 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $17,396,695 | 398,276 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $19,714,505 | 370,295 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $5,402,391 | 118,943 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $43,817,904 | 757,833 | Shares | Sole | 2022-05-16 | |
| 2022-03-31 | $5,782,000 | 100,000 | Call | Sole | 2022-05-16 | |
| 2021-12-31 | $212,867 | 4,790 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $6,753,385 | 140,199 | Shares | Sole | 2021-11-15 | |
| 2021-09-30 | $1,926,800 | 40,000 | Call | Sole | 2021-11-15 | |
| 2021-06-30 | $1,125,609 | 13,269 | Shares | Sole | 2021-08-16 | |
| 2021-06-30 | $1,272,450 | 15,000 | Call | Sole | 2021-08-16 | |
| 2021-03-31 | $839,300 | 10,000 | Call | Sole | 2021-05-17 | |
| 2021-03-31 | $401,688 | 4,786 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $4,267,994 | 56,710 | Shares | Sole | 2021-02-16 | |
| 2020-12-31 | $752,600 | 10,000 | Call | Sole | 2021-02-16 | |
| 2020-09-30 | $1,980,800 | 40,000 | Call | Sole | 2020-11-16 | |
| 2020-06-30 | $9,225,525 | 240,123 | Shares | Sole | 2020-08-14 | |
| 2020-06-30 | $2,305,200 | 60,000 | Call | Sole | 2020-08-14 | |
| 2020-03-31 | $1,508,436 | 48,880 | Shares | Sole | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||