Walleye Capital
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Walleye Capital’s Tandem Diabetes Care TNDM Stock Holding History

Walleye Capital’s Portfolio TNDM Stock Details TNDM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-18,400
Closed -$404K – 4985
2025
Q4 		$404K Sell
18,400
-25,900
-58% -$467K ﹤0.01% 3090
2025
Q3 		$538K Buy
44,300
+36,500
+468% +$494K ﹤0.01% 2551
2025
Q2 		$145K Buy
+7,800
New +$154K ﹤0.01% 3575
2025
Q1 		– Sell
-2,400
Closed -$86.4K – 5131
2024
Q4 		$86.4K Sell
2,400
-8,700
-78% -$294K ﹤0.01% 4193
2024
Q3 		$471K Sell
11,100
-16,700
-60% -$708K ﹤0.01% 3346
2024
Q2 		$1.12M Buy
27,800
+26,100
+1,535% +$1.09M ﹤0.01% 2722
2024
Q1 		$60.2K Sell
1,700
-20,700
-92% -$555K ﹤0.01% 4620
2023
Q4 		$663K Buy
22,400
+16,400
+273% +$340K ﹤0.01% 2715
2023
Q3 		$125K Buy
6,000
+4,600
+329% +$126K ﹤0.01% 3831
2023
Q2 		$34.4K Buy
+1,400
New +$45K ﹤0.01% 3708
2023
Q1 		– Sell
-100
Closed -$4.5K – 4367
2022
Q4 		$4.5K Sell
100
-600
-86% -$27.2K ﹤0.01% 2868
2022
Q3 		$33K Buy
+700
New +$38.4K ﹤0.01% 2666
2019
Q3 		– Sell
-100
Closed -$6K – 2265
2019
Q2 		$6K Buy
+100
New +$6.45K ﹤0.01% 1625

Other funds holding TNDM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
SC
Sessa Capital New York $5.51B AUM 47.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
ACH
ArrowMark Colorado Holdings Denver, Colorado $3.76B AUM 21.77% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
GKIM
GW&K Investment Management Boston, Massachusetts $11.3B AUM 31.98% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Walleye Capital's TNDM Position: Q4 2025 in Review

Walleye Capital sold out of Tandem Diabetes Care (TNDM) in Q4 2025, closing a stake of 463,376 shares — an estimated $8.36M sold.

Walleye Capital first reported a position in TNDM in Q1 2019 and held it in 15 quarters. The position peaked at $10.6M in Q2 2025. 268 funds tracked by Wall St. Rank hold TNDM as of Q4 2025.

  • Walleye Capital reported no remaining Tandem Diabetes Care position as of Q4 2025 after selling out during the quarter.
  • Walleye Capital sold 463,376 Tandem Diabetes Care shares in Q4 2025, an estimated $8.36M.
  • Walleye Capital first reported a position in Tandem Diabetes Care in Q1 2019 and held it in 15 quarters.
  • Walleye Capital's Tandem Diabetes Care position peaked at $10.6M in Q2 2025.
  • 268 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q4 2025.

Based on Walleye Capital's 13F filing for Q4 2025, filed 13 Feb 2026.