Position in TNDM
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$42,033,426
-$3,874,067 QoQ
Shares Held
2,192,667
+5.0% QoQ
Ownership
3.20%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in TNDM Over Time
Shares Held
Position Value (USD)
Derivatives in TNDM
reported options exposure · as of Mar 31, 2026CallValue
$897,156
CallShares
46,800
PutValue
$722,709
PutShares
37,700
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, 2026CITADEL ADVISORS LLC holds $1,870,037,695 across 83 Medical Devices names. TNDM ranks #13 (2.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | BSX |
Boston Scientific Corp
|
4,217,314 | $264,636,453 | |
| 2 | ABT |
Abbott Laboratories
|
1,915,846 | $196,699,908 | |
| 3 | GMED |
Globus Medical Inc
|
1,966,114 | $169,400,381 | |
| 4 | GKOS |
GLAUKOS Corp
|
1,446,926 | $155,776,052 | |
| 5 | DXCM |
Dexcom Inc
|
2,091,872 | $131,369,561 | |
| 6 | ZBH |
Zimmer Biomet Holdings, Inc.
|
1,378,665 | $124,658,889 | |
| 7 | GEHC |
GE HealthCare Technologies Inc.
|
1,293,268 | $92,054,816 | |
| 8 | MDT |
Medtronic plc
|
982,741 | $85,154,507 |
All Filings in TNDM
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $897,156 | 46,800 | Call | Defined | 2026-05-15 | |
| 2026-03-31 | $42,033,426 | 2,192,667 | Shares | Defined | 2026-05-15 | |
| 2026-03-31 | $722,709 | 37,700 | Put | Defined | 2026-05-15 | |
| 2025-12-31 | $45,907,493 | 2,088,603 | Shares | Defined | 2026-02-17 | |
| 2025-12-31 | $769,300 | 35,000 | Put | Defined | 2026-02-17 | |
| 2025-12-31 | $624,232 | 28,400 | Call | Defined | 2026-02-17 | |
| 2025-09-30 | $483,184 | 39,801 | Shares | Defined | 2025-11-14 | |
| 2025-09-30 | $546,300 | 45,000 | Call | Defined | 2025-11-14 | |
| 2025-09-30 | $654,346 | 53,900 | Put | Defined | 2025-11-14 | |
| 2025-06-30 | $6,579,155 | 352,959 | Shares | Defined | 2025-08-14 | |
| 2025-06-30 | $708,320 | 38,000 | Put | Defined | 2025-08-14 | |
| 2025-06-30 | $525,648 | 28,200 | Call | Defined | 2025-08-14 | |
| 2025-03-31 | $421,520 | 22,000 | Call | Defined | 2025-05-15 | |
| 2025-03-31 | $1,074,876 | 56,100 | Put | Defined | 2025-05-15 | |
| 2025-03-31 | $2,184,891 | 114,034 | Shares | Defined | 2025-05-15 | |
| 2024-12-31 | $1,869,438 | 51,900 | Call | Defined | 2025-02-14 | |
| 2024-12-31 | $4,748,371 | 131,826 | Shares | Defined | 2025-02-14 | |
| 2024-12-31 | $1,873,040 | 52,000 | Put | Defined | 2025-02-14 | |
| 2024-09-30 | $14,751,173 | 347,823 | Shares | Defined | 2024-11-14 | |
| 2024-09-30 | $873,646 | 20,600 | Put | Defined | 2024-11-14 | |
| 2024-09-30 | $3,274,052 | 77,200 | Call | Defined | 2024-11-14 | |
| 2024-06-30 | $2,417,400 | 60,000 | Put | Defined | 2024-08-14 | |
| 2024-06-30 | $72,874,173 | 1,808,741 | Shares | Defined | 2024-08-14 | |
| 2024-06-30 | $4,073,319 | 101,100 | Call | Defined | 2024-08-14 | |
| 2024-03-31 | $20,079,877 | 567,068 | Shares | Defined | 2024-05-15 | |
| 2024-03-31 | $538,232 | 15,200 | Put | Defined | 2024-05-15 | |
| 2024-03-31 | $3,130,244 | 88,400 | Call | Defined | 2024-05-15 | |
| 2023-12-31 | $1,573,656 | 53,200 | Call | Defined | 2024-02-14 | |
| 2023-12-31 | $10,669,890 | 360,713 | Shares | Defined | 2024-02-14 | |
| 2023-12-31 | $585,684 | 19,800 | Put | Defined | 2024-02-14 | |
| 2023-09-30 | $13,404,209 | 645,364 | Shares | Defined | 2023-11-14 | |
| 2023-09-30 | $1,021,884 | 49,200 | Call | Defined | 2023-11-14 | |
| 2023-09-30 | $951,266 | 45,800 | Put | Defined | 2023-11-14 | |
| 2023-06-30 | $954,606 | 38,900 | Put | Defined | 2023-08-14 | |
| 2023-06-30 | $790,188 | 32,200 | Call | Defined | 2023-08-14 | |
| 2023-06-30 | $4,199,406 | 171,125 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $7,312,032 | 180,055 | Shares | Defined | 2023-05-15 | |
| 2023-03-31 | $2,578,735 | 63,500 | Put | Defined | 2023-05-15 | |
| 2023-03-31 | $1,993,951 | 49,100 | Call | Defined | 2023-05-15 | |
| 2022-12-31 | $3,627,465 | 80,700 | Put | Defined | 2023-02-14 | |
| 2022-12-31 | $6,940,280 | 154,400 | Call | Defined | 2023-02-14 | |
| 2022-12-31 | $11,984,523 | 266,619 | Shares | Defined | 2023-02-14 | |
| 2022-09-30 | $14,824,216 | 309,806 | Shares | Defined | 2022-11-14 | |
| 2022-09-30 | $5,608,020 | 117,200 | Call | Defined | 2022-11-14 | |
| 2022-09-30 | $6,005,175 | 125,500 | Put | Defined | 2022-11-14 | |
| 2022-06-30 | $2,681,306 | 45,300 | Shares | Defined | 2022-08-15 | |
| 2022-06-30 | $5,421,804 | 91,600 | Put | Defined | 2022-08-15 | |
| 2022-06-30 | $7,966,974 | 134,600 | Call | Defined | 2022-08-15 | |
| 2022-03-31 | $12,256,966 | 105,400 | Call | Defined | 2022-05-16 | |
| 2022-03-31 | $6,349,434 | 54,600 | Put | Defined | 2022-05-16 | |
| No filing history on record for this holder in this stock. | ||||||