American Century Companies
TNDM icon

American Century Companies’s Tandem Diabetes Care TNDM Stock Holding History

American Century Companies’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 		– Sell
-33,470
Closed -$642K – 2999
2026
Q1 		$642K Buy
33,470
+710
+2% +$15.4K ﹤0.01% 2458
2025
Q4 		$720K Buy
32,760
+11
+0% +$199 ﹤0.01% 2415
2025
Q3 		$398K Buy
+32,749
New +$443K ﹤0.01% 2569
2023
Q2 		– Sell
-12,391
Closed -$503K – 2842
2023
Q1 		$503K Buy
12,391
+732
+6% +$30.3K ﹤0.01% 2126
2022
Q4 		$524K Buy
+11,659
New +$528K ﹤0.01% 2035
2022
Q3 		– Sell
-428,340
Closed -$25.4M – 2473
2022
Q2 		$25.4M Buy
428,340
+95,841
+29% +$7.87M 0.02% 598
2022
Q1 		$38.7M Buy
332,499
+68,811
+26% +$8.03M 0.03% 512
2021
Q4 		$39.7M Buy
263,688
+47,473
+22% +$6.41M 0.03% 529
2021
Q3 		$25.8M Sell
216,215
-137,830
-39% -$15.2M 0.02% 625
2021
Q2 		$34.5M Sell
354,045
-67,710
-16% -$6.04M 0.02% 542
2021
Q1 		$37.2M Sell
421,755
-259,495
-38% -$24.1M 0.03% 500
2020
Q4 		$65.2M Buy
681,250
+19,034
+3% +$1.96M 0.05% 345
2020
Q3 		$75.2M Sell
662,216
-31,284
-5% -$3.29M 0.07% 288
2020
Q2 		$68.6M Sell
693,500
-54,112
-7% -$4.32M 0.07% 281
2020
Q1 		$48.1M Buy
747,612
+239,901
+47% +$16.8M 0.06% 307
2019
Q4 		$30.3M Buy
507,711
+45,972
+10% +$2.84M 0.03% 438
2019
Q3 		$27.2M Buy
+461,739
New +$29.5M 0.03% 436
2016
Q3 		– Sell
-24,622
Closed -$1.86M – 1410
2016
Q2 		$1.86M Buy
24,622
+248
+1% +$20K ﹤0.01% 1042
2016
Q1 		$2.12M Buy
+24,374
New +$2.13M ﹤0.01% 986

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 $3.38T AUM 44.17% 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

American Century Companies's TNDM Position: Q2 2026 in Review

American Century Companies sold out of Tandem Diabetes Care (TNDM) in Q2 2026, closing a stake of 33,470 shares — an estimated $642K sold.

American Century Companies first reported a position in TNDM in Q1 2016 and held it in 19 quarters. The position peaked at $75.2M in Q3 2020. 274 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

  • American Century Companies reported no remaining Tandem Diabetes Care position as of Q2 2026 after selling out during the quarter.
  • American Century Companies sold 33,470 Tandem Diabetes Care shares in Q2 2026, an estimated $642K.
  • American Century Companies first reported a position in Tandem Diabetes Care in Q1 2016 and held it in 19 quarters.
  • American Century Companies's Tandem Diabetes Care position peaked at $75.2M in Q3 2020.
  • 274 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on American Century Companies's 13F filing for Q2 2026, filed 12 Aug 2026.