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Equibles

CITADEL ADVISORS LLC

Position in TNDM — Tandem Diabetes Care Inc

CIK 1423053 MIAMI, FL
Back to TNDM Full portfolio

Position in TNDM

as of Jun 30, 2026 · filed Sep 2, 2026
Position Value
$26,194,413
-$15,839,013 QoQ
Shares Held
1,735,879
-20.8% QoQ
Ownership
2.49%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#14
of 274 holders
Holding Since
Mar 2020
26 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 Jun 30, 2026
CallValue
$1,130,241
CallShares
74,900
PutValue
$654,906
PutShares
43,400

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, 2026

CITADEL ADVISORS LLC holds $3,553,993,098 across 97 Medical Devices names. TNDM ranks #18 (0.7% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 ABT
Abbott Laboratories
 8,597,227 $780,112,377
2 MDT
Medtronic plc
 5,373,877 $420,398,397
3 EW
Edwards Lifesciences Corp
 3,997,925 $361,652,295
4 ZBH
Zimmer Biomet Holdings, Inc.
 3,477,472 $299,375,563
5 BSX
Boston Scientific Corp
 4,987,748 $212,877,084
6 GKOS
GLAUKOS Corp
 1,390,017 $194,268,775
7 GEHC
GE HealthCare Technologies Inc.
 2,367,032 $151,513,717
8 PEN
Penumbra Inc
 448,763 $141,696,917

All Filings in TNDM

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $1,130,241 74,900
2026-06-30 $26,194,413 1,735,879
2026-06-30 $654,906 43,400
2026-03-31 $897,156 46,800
2026-03-31 $42,033,426 2,192,667
2026-03-31 $722,709 37,700
2025-12-31 $45,907,493 2,088,603
2025-12-31 $769,300 35,000
2025-12-31 $624,232 28,400
2025-09-30 $483,184 39,801
2025-09-30 $546,300 45,000
2025-09-30 $654,346 53,900
2025-06-30 $6,579,155 352,959
2025-06-30 $708,320 38,000
2025-06-30 $525,648 28,200
2025-03-31 $421,520 22,000
2025-03-31 $1,074,876 56,100
2025-03-31 $2,184,891 114,034
2024-12-31 $1,869,438 51,900
2024-12-31 $4,748,371 131,826
2024-12-31 $1,873,040 52,000
2024-09-30 $14,751,173 347,823
2024-09-30 $873,646 20,600
2024-09-30 $3,274,052 77,200
2024-06-30 $2,417,400 60,000
2024-06-30 $72,874,173 1,808,741
2024-06-30 $4,073,319 101,100
2024-03-31 $20,079,877 567,068
2024-03-31 $538,232 15,200
2024-03-31 $3,130,244 88,400
2023-12-31 $1,573,656 53,200
2023-12-31 $10,669,890 360,713
2023-12-31 $585,684 19,800
2023-09-30 $13,404,209 645,364
2023-09-30 $1,021,884 49,200
2023-09-30 $951,266 45,800
2023-06-30 $954,606 38,900
2023-06-30 $790,188 32,200
2023-06-30 $4,199,406 171,125
2023-03-31 $7,312,032 180,055
2023-03-31 $2,578,735 63,500
2023-03-31 $1,993,951 49,100
2022-12-31 $3,627,465 80,700
2022-12-31 $6,940,280 154,400
2022-12-31 $11,984,523 266,619
2022-09-30 $14,824,216 309,806
2022-09-30 $5,608,020 117,200
2022-09-30 $6,005,175 125,500
2022-06-30 $2,681,306 45,300
2022-06-30 $5,421,804 91,600