Assenagon Asset Management
TNDM icon

Assenagon Asset Management’s Tandem Diabetes Care TNDM Stock Holding History

Assenagon Asset Management’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
Q2 		$399K Sell
26,430
-152,210
-85% -$2.66M ﹤0.01% 1093
2026
Q1 		$3.42M Sell
178,640
-1,049,216
-85% -$22.8M 0.01% 661
2025
Q4 		$27M Buy
+1,227,856
New +$22.2M 0.04% 313
2025
Q3 		– Sell
-31,403
Closed -$585K – 1267
2025
Q2 		$585K Buy
+31,403
New +$622K ﹤0.01% 1012
2025
Q1 		– Sell
-98,231
Closed -$3.54M – 1336
2024
Q4 		$3.54M Sell
98,231
-279,334
-74% -$9.45M 0.01% 778
2024
Q3 		$16M Buy
377,565
+66,138
+21% +$2.8M 0.03% 406
2024
Q2 		$12.5M Buy
311,427
+85,000
+38% +$3.55M 0.03% 391
2024
Q1 		$8.02M Buy
+226,427
New +$6.07M 0.02% 486
2023
Q3 		– Sell
-12,053
Closed -$296K – 1472
2023
Q2 		$296K Sell
12,053
-26,372
-69% -$848K ﹤0.01% 1233
2023
Q1 		$1.56M Sell
38,425
-49,087
-56% -$2.03M 0.01% 927
2022
Q4 		$3.93M Sell
87,512
-202,703
-70% -$9.18M 0.01% 591
2022
Q3 		$13.9M Sell
290,215
-63,894
-18% -$3.5M 0.05% 287
2022
Q2 		$21M Buy
354,109
+234,135
+195% +$19.2M 0.08% 223
2022
Q1 		$14M Buy
119,974
+59,198
+97% +$6.91M 0.04% 293
2021
Q4 		$9.15M Buy
60,776
+16,140
+36% +$2.18M 0.03% 350
2021
Q3 		$5.33M Sell
44,636
-355,116
-89% -$39.1M 0.02% 417
2021
Q2 		$38.9M Buy
399,752
+195,481
+96% +$17.4M 0.13% 137
2021
Q1 		$18M Buy
204,271
+200,960
+6,069% +$18.7M 0.07% 225
2020
Q4 		$317K Sell
3,311
-9,661
-74% -$996K ﹤0.01% 907
2020
Q3 		$1.47M Buy
+12,972
New +$1.36M 0.01% 666
2020
Q1 		– Sell
-16,814
Closed -$1M – 994
2019
Q4 		$1M Buy
+16,814
New +$1.04M 0.01% 577

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
FLAM
First Light Asset Management Edina, Minnesota $1.65B AUM 203.21% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
GKIM
GW&K Investment Management Boston, Massachusetts $12.8B AUM 48.82% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return
PIM
Paradice Investment Management Denver, Colorado $627M AUM 43.41% 1-Year Est. Return
Jacobs Levy Equity Management
Jacobs Levy Equity Management Florham Park, New Jersey $27.8B AUM 46.46% 1-Year Est. Return

Assenagon Asset Management's TNDM Position: Q2 2026 in Review

Assenagon Asset Management reduced its Tandem Diabetes Care (TNDM) stake by 85% in Q2 2026, selling an estimated $2.66M and leaving 26,430 shares worth $399K. The position accounts for ﹤0.01% of the portfolio, ranked #1093.

Assenagon Asset Management first reported a position in TNDM in Q4 2019 and has held it in 21 quarters since. The position peaked at $38.9M in Q2 2021. 273 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

  • Assenagon Asset Management held 26,430 shares of Tandem Diabetes Care worth $399K as of Q2 2026.
  • Assenagon Asset Management sold 152,210 Tandem Diabetes Care shares in Q2 2026, an estimated $2.66M.
  • Tandem Diabetes Care made up ﹤0.01% of Assenagon Asset Management's portfolio in Q2 2026, its #1093 holding.
  • Assenagon Asset Management first reported a position in Tandem Diabetes Care in Q4 2019 and has held it in 21 quarters since.
  • Assenagon Asset Management's Tandem Diabetes Care position peaked at $38.9M in Q2 2021.
  • 273 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on Assenagon Asset Management's 13F filing for Q2 2026, filed 8 Jul 2026.