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Dmitry Balyasny’s Tandem Diabetes Care TNDM Stock Holding History

Dmitry Balyasny’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
-262,788
Closed -$5.78M – 3531
2025
Q4 		$5.78M Buy
+262,788
New +$4.74M 0.01% 1322
2025
Q3 		– Sell
-230,934
Closed -$4.3M – 3476
2025
Q2 		$4.3M Sell
230,934
-538,809
-70% -$10.7M 0.01% 1362
2025
Q1 		$14.7M Buy
+769,743
New +$22.5M 0.02% 726
2024
Q3 		– Sell
-8,629
Closed -$348K – 3171
2024
Q2 		$348K Sell
8,629
-225,891
-96% -$9.42M ﹤0.01% 2183
2024
Q1 		$8.3M Buy
234,520
+128,111
+120% +$3.43M 0.01% 1008
2023
Q4 		$3.15M Buy
+106,409
New +$2.21M 0.01% 1298
2023
Q2 		– Sell
-280,192
Closed -$11.4M – 2790
2023
Q1 		$11.4M Sell
280,192
-300,703
-52% -$12.4M 0.03% 728
2022
Q4 		$26.1M Buy
580,895
+287,375
+98% +$13M 0.07% 370
2022
Q3 		$14M Buy
+293,520
New +$16.1M 0.04% 548
2022
Q2 		– Sell
-102,891
Closed -$12M – 3184
2022
Q1 		$12M Sell
102,891
-68,587
-40% -$8.01M 0.04% 629
2021
Q4 		$25.8M Buy
+171,478
New +$23.1M 0.09% 313
2020
Q4 		– Sell
-285,720
Closed -$32.4M – 1699
2020
Q3 		$32.4M Buy
285,720
+131,026
+85% +$13.8M 0.24% 104
2020
Q2 		$15.3M Sell
154,694
-2,849
-2% -$227K 0.13% 236
2020
Q1 		$10.1M Sell
157,543
-251,471
-61% -$17.6M 0.12% 227
2019
Q4 		$24.4M Buy
409,014
+191,161
+88% +$11.8M 0.15% 214
2019
Q3 		$12.8M Sell
217,853
-39,240
-15% -$2.5M 0.09% 338
2019
Q2 		$16.6M Buy
257,093
+252,928
+6,073% +$16.3M 0.11% 263
2019
Q1 		$264K Sell
4,165
-82,270
-95% -$4.32M ﹤0.01% 1319
2018
Q4 		$3.28M Buy
86,435
+27,462
+47% +$970K 0.02% 588
2018
Q3 		$2.53M Sell
58,973
-356,027
-86% -$12.4M 0.01% 912
2018
Q2 		$9.14M Buy
415,000
+127,500
+44% +$1.57M 0.04% 512
2018
Q1 		$1.43M Buy
+287,500
New +$927K 0.01% 1097

Other funds holding TNDM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
SC
Sessa Capital New York $5.98B AUM 99.85% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
ACH
ArrowMark Colorado Holdings Denver, Colorado $2.4B AUM 42.85% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
GKIM
GW&K Investment Management Boston, Massachusetts $12.8B AUM 48.82% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $17.3B AUM 211.34% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return

Dmitry Balyasny's TNDM Position: Q1 2026 in Review

Dmitry Balyasny sold out of Tandem Diabetes Care (TNDM) in Q1 2026, closing a stake of 262,788 shares — an estimated $5.78M sold.

Dmitry Balyasny first reported a position in TNDM in Q1 2018 and held it in 22 quarters. The position peaked at $32.4M in Q3 2020. 272 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

  • Dmitry Balyasny reported no remaining Tandem Diabetes Care position as of Q1 2026 after selling out during the quarter.
  • Dmitry Balyasny sold 262,788 Tandem Diabetes Care shares in Q1 2026, an estimated $5.78M.
  • Dmitry Balyasny first reported a position in Tandem Diabetes Care in Q1 2018 and held it in 22 quarters.
  • Dmitry Balyasny's Tandem Diabetes Care position peaked at $32.4M in Q3 2020.
  • 272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

Based on Balyasny Asset Management's 13F filing for Q1 2026, filed 15 May 2026.