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Equibles

Walleye Trading LLC

Position in TNDM — Tandem Diabetes Care Inc

CIK 1388391 NEW YORK, NY
Back to TNDM Full portfolio

Position in TNDM

as of Jun 30, 2026 · filed Aug 3, 2026
Position Value
$314,611
+$314,611 QoQ
Shares Held
20,849
Ownership
0.030%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#145
of 274 holders
Holding Since
Mar 2020
21 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
$1,509
CallShares
100
PutValue
$481,371
PutShares
31,900

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

Walleye Trading LLC holds $21,407,800 across 13 Medical Devices names. TNDM ranks #7 (1.5% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 BSX
Boston Scientific Corp
 234,744 $10,018,873
2 DXCM
Dexcom Inc
 51,904 $3,495,734
3 GEHC
GE HealthCare Technologies Inc.
 45,003 $2,880,642
4 BRKR
Bruker Corp
 44,895 $2,701,781
5 PODD
Insulet Corp
 5,663 $862,191
6 BFLY
Butterfly Network, Inc.
 85,194 $717,333
7 TNDM
Tandem Diabetes Care Inc
This page 		20,849 $314,611
8 SYK
Stryker Corp
 723 $227,629

All Filings in TNDM

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $314,611 20,849
2026-06-30 $1,509 100
2026-06-30 $481,371 31,900
2026-03-31 $207,036 10,800
2026-03-31 $69,012 3,600
2025-12-31 $422,016 19,200
2025-12-31 $205,688 9,358
2025-12-31 $367,066 16,700
2025-09-30 $251,298 20,700
2025-09-30 $86,412 7,118
2025-09-30 $199,096 16,400
2025-06-30 $318,744 17,100
2025-06-30 $114,505 6,143
2025-06-30 $130,480 7,000
2024-09-30 $25,446 600
2024-09-30 $212,050 5,000
2024-06-30 $169,218 4,200
2024-06-30 $261,885 6,500
2024-03-31 $77,902 2,200
2024-03-31 $208,919 5,900
2023-12-31 $1,206,864 40,800
2023-12-31 $1,981 67
2023-12-31 $349,044 11,800
2023-09-30 $157,852 7,600
2023-09-30 $178,622 8,600
2022-12-31 $2,081,185 46,300
2022-12-31 $161,820 3,600
2022-09-30 $2,421,210 50,600
2022-09-30 $143,550 3,000
2022-06-30 $1,444,236 24,400
2022-06-30 $846,417 14,300
2022-03-31 $697,740 6,000
2022-03-31 $396,432 3,409
2022-03-31 $860,546 7,400
2021-12-31 $2,859,880 19,000
2021-12-31 $3,522,168 23,400
2021-09-30 $2,172,716 18,200
2021-09-30 $204,020 1,709
2021-06-30 $876,600 9,000
2021-06-30 $440,637 4,524
2021-06-30 $48,700 500
2020-12-31 $47,840 500
2020-12-31 $620,006 6,480
2020-12-31 $325,312 3,400
2020-09-30 $465,350 4,100
2020-09-30 $463,080 4,080
2020-09-30 $522,100 4,600
2020-06-30 $227,516 2,300
2020-06-30 $306,652 3,100
2020-06-30 $453,251 4,582

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