Walleye Capital
TNDM icon

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
2025
Q4 		– Sell
-463,376
Closed -$8.36M – 5144
2025
Q3 		$5.63M Sell
463,376
-103,847
-18% -$1.41M 0.02% 857
2025
Q2 		$10.6M Buy
+567,223
New +$11.2M 0.04% 477
2025
Q1 		– Sell
-2,098
Closed -$75.6K – 5130
2024
Q4 		$75.6K Buy
2,098
+1,279
+156% +$43.3K ﹤0.01% 4239
2024
Q3 		$34.7K Sell
819
-55,015
-99% -$2.33M ﹤0.01% 4714
2024
Q2 		$2.25M Buy
55,834
+50,813
+1,012% +$2.12M ﹤0.01% 1992
2024
Q1 		$178K Buy
+5,021
New +$135K ﹤0.01% 4054
2023
Q3 		– Sell
-215,299
Closed -$5.91M – 5330
2023
Q2 		$5.28M Buy
215,299
+161,961
+304% +$5.21M 0.02% 697
2023
Q1 		$2.17M Buy
53,338
+35,861
+205% +$1.48M 0.03% 673
2022
Q4 		$786K Buy
17,477
+8,648
+98% +$391K 0.01% 1145
2022
Q3 		$422K Sell
8,829
-11,787
-57% -$646K 0.01% 1580
2022
Q2 		$1.22M Buy
20,616
+8,071
+64% +$663K 0.03% 555
2022
Q1 		$1.46M Buy
12,545
+6,566
+110% +$767K 0.04% 467
2021
Q4 		$900K Sell
5,979
-2,268
-28% -$306K 0.03% 656
2021
Q3 		$985 Buy
+8,247
New +$909K 0.03% 449
2019
Q2 		– Sell
-60
Closed -$3.87K – 2038
2019
Q1 		$4K Buy
+60
New +$3.15K ﹤0.01% 1451

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.