Position in QSI
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$1,896,320
+$1,896,320 QoQ
Shares Held
2,142,735
Ownership
0.979%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#10
of 141 holders
Holding Since
Mar 2021
20 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in QSI Over Time
Shares Held
Position Value (USD)
Derivatives in QSI
reported options exposure · as of Jun 30, 2026CallValue
$218,860
CallShares
247,300
PutValue
$29,913
PutShares
33,800
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 Jun 30, 2026JANE STREET GROUP, LLC holds $1,155,682,201 across 70 Medical Devices names. QSI ranks #20 (0.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | BSX |
Boston Scientific Corp
|
12,087,991 | $515,915,454 | |
| 2 | MDT |
Medtronic plc
|
3,524,983 | $275,759,419 | |
| 3 | ABT |
Abbott Laboratories
|
1,009,061 | $91,562,193 | |
| 4 | SYK |
Stryker Corp
|
169,217 | $53,276,278 | |
| 5 | DXCM |
Dexcom Inc
|
750,473 | $50,544,356 | |
| 6 | IRTC |
iRhythm Holdings, Inc.
|
275,262 | $32,742,414 | |
| 7 | ESTA |
Establishment Labs Holdings Inc.
|
361,302 | $31,003,324 | |
| 8 | TXG |
10x Genomics, Inc.
|
752,999 | $28,869,981 |
All Filings in QSI
Export CSV
40 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $218,860 | 247,300 | Call | Defined | 2026-08-14 | |
| 2026-06-30 | $1,896,320 | 2,142,735 | Shares | Defined | 2026-08-14 | |
| 2026-06-30 | $29,913 | 33,800 | Put | Defined | 2026-08-14 | |
| 2026-03-31 | $24,071 | 31,100 | Put | Defined | 2026-05-12 | |
| 2026-03-31 | $194,661 | 251,500 | Call | Defined | 2026-05-12 | |
| 2025-12-31 | $306,460 | 278,600 | Call | Defined | 2026-02-12 | |
| 2025-12-31 | $1,214,435 | 1,104,033 | Shares | Defined | 2026-02-12 | |
| 2025-12-31 | $57,420 | 52,200 | Put | Defined | 2026-02-12 | |
| 2025-09-30 | $21,150 | 15,000 | Put | Defined | 2025-11-14 | |
| 2025-09-30 | $86,292 | 61,200 | Call | Defined | 2025-11-14 | |
| 2025-09-30 | $2,270,131 | 1,610,023 | Shares | Defined | 2025-11-14 | |
| 2025-06-30 | $558,115 | 284,753 | Shares | Defined | 2025-08-14 | |
| 2025-06-30 | $84,280 | 43,000 | Call | Defined | 2025-08-14 | |
| 2025-06-30 | $46,648 | 23,800 | Put | Defined | 2025-08-14 | |
| 2025-03-31 | $44,760 | 37,300 | Call | Defined | 2025-05-19 | |
| 2025-03-31 | $44,880 | 37,400 | Put | Defined | 2025-05-19 | |
| 2024-12-31 | $64,381 | 23,845 | Shares | Defined | 2025-02-14 | |
| 2024-12-31 | $120,960 | 44,800 | Put | Defined | 2025-02-14 | |
| 2024-12-31 | $268,380 | 99,400 | Call | Defined | 2025-02-14 | |
| 2024-09-30 | $226,399 | 256,689 | Shares | Defined | 2024-11-15 | |
| 2024-06-30 | $319,258 | 304,056 | Shares | Defined | 2024-08-15 | |
| 2024-03-31 | $297,711 | 151,123 | Shares | Defined | 2024-05-16 | |
| 2023-12-31 | $24,549 | 12,214 | Shares | Defined | 2024-02-15 | |
| 2023-09-30 | $46,123 | 27,785 | Shares | Defined | 2023-11-15 | |
| 2023-06-30 | $48,864 | 27,299 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $230,624 | 131,037 | Shares | Defined | 2023-05-16 | |
| 2022-09-30 | $31,501 | 11,455 | Shares | Defined | 2022-11-15 | |
| 2022-03-31 | $319,400 | 68,248 | Shares | Defined | 2022-05-17 | |
| 2022-03-31 | $875,628 | 187,100 | Call | Defined | 2022-05-17 | |
| 2022-03-31 | $104,364 | 22,300 | Put | Defined | 2022-05-17 | |
| 2021-12-31 | $206,194 | 26,200 | Put | Defined | 2022-02-15 | |
| 2021-12-31 | $1,581,870 | 201,000 | Call | Defined | 2022-02-15 | |
| 2021-09-30 | $207,090 | 24,831 | Shares | Defined | 2021-11-16 | |
| 2021-09-30 | $1,333,566 | 159,900 | Call | Defined | 2021-11-16 | |
| 2021-09-30 | $266,046 | 31,900 | Put | Defined | 2021-11-16 | |
| 2021-06-30 | $534,585 | 43,604 | Shares | Defined | 2021-08-16 | |
| 2021-06-30 | $2,261,970 | 184,500 | Call | Defined | 2021-08-16 | |
| 2021-06-30 | $128,730 | 10,500 | Put | Defined | 2021-08-16 | |
| 2021-03-31 CAPA | — | 13,100 | Call | Defined | 2021-05-18 | |
| 2021-03-31 CAPA | — | 28,931 | Shares | Defined | 2021-05-18 | |
| No filing history on record for this holder in this stock. | ||||||