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
-29,500
Closed -$648K – 4984
2025
Q4 		$648K Sell
29,500
-39,700
-57% -$716K ﹤0.01% 2775
2025
Q3 		$840K Buy
69,200
+54,000
+355% +$731K ﹤0.01% 2227
2025
Q2 		$283K Buy
+15,200
New +$301K ﹤0.01% 3086
2025
Q1 		– Sell
-30,500
Closed -$1.1M – 5129
2024
Q4 		$1.1M Sell
30,500
-5,600
-16% -$189K ﹤0.01% 2300
2024
Q3 		$1.53M Sell
36,100
-2,600
-7% -$110K ﹤0.01% 2225
2024
Q2 		$1.56M Buy
38,700
+38,400
+12,800% +$1.6M ﹤0.01% 2353
2024
Q1 		$10.6K Sell
300
-30,300
-99% -$812K ﹤0.01% 5061
2023
Q4 		$905K Buy
30,600
+24,200
+378% +$502K ﹤0.01% 2437
2023
Q3 		$133K Hold
6,400
– – ﹤0.01% 3794
2023
Q2 		$157K Buy
6,400
+3,400
+113% +$109K ﹤0.01% 3226
2023
Q1 		$122K Buy
+3,000
New +$124K ﹤0.01% 2819
2019
Q3 		– Sell
-14,800
Closed -$955K – 2264
2019
Q2 		$955K Buy
14,800
+4,100
+38% +$265K 0.1% 283
2019
Q1 		$679K Buy
+10,700
New +$562K 0.11% 276

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.