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Driehaus Capital Management’s Tandem Diabetes Care TNDM Stock Holding History

Driehaus Capital 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 		$27M Sell
1,786,996
-517,418
-22% -$9.04M 0.16% 191
2026
Q1 		$44.2M Buy
2,304,414
+694,072
+43% +$15.1M 0.32% 109
2025
Q4 		$35.4M Buy
+1,610,342
New +$29.1M 0.24% 136
2024
Q4 		– Sell
-777,590
Closed -$33M – 453
2024
Q3 		$33M Sell
777,590
-177,654
-19% -$7.53M 0.28% 112
2024
Q2 		$38.5M Sell
955,244
-362,193
-27% -$15.1M 0.37% 85
2024
Q1 		$46.7M Buy
+1,317,437
New +$35.3M 0.46% 57
2022
Q1 		– Sell
-42,164
Closed -$6.35M – 448
2021
Q4 		$6.35M Buy
+42,164
New +$5.69M 0.06% 283
2021
Q1 		– Sell
-8,950
Closed -$856K – 519
2020
Q4 		$856K Sell
8,950
-351,720
-98% -$36.2M 0.01% 333
2020
Q3 		$40.9M Sell
360,670
-935
-0.3% -$98.2K 0.84% 21
2020
Q2 		$35.8M Buy
361,605
+19,824
+6% +$1.58M 0.87% 18
2020
Q1 		$22M Buy
341,781
+150,896
+79% +$10.6M 0.73% 30
2019
Q4 		$11.4M Sell
190,885
-157,573
-45% -$9.72M 0.3% 94
2019
Q3 		$20.6M Sell
348,458
-116,601
-25% -$7.44M 0.67% 33
2019
Q2 		$30M Sell
465,059
-18,660
-4% -$1.2M 0.94% 17
2019
Q1 		$30.7M Buy
483,719
+133,653
+38% +$7.02M 1.15% 14
2018
Q4 		$13.3M Buy
350,066
+138,206
+65% +$4.88M 0.57% 43
2018
Q3 		$9.08M Buy
211,860
+166,860
+371% +$5.83M 0.28% 115
2018
Q2 		$991K Buy
+45,000
New +$553K 0.03% 345
2016
Q1 		– Sell
-7,470
Closed -$882K – 638
2015
Q4 		$882K Buy
+7,470
New +$741K 0.03% 391
2014
Q2 		– Sell
-4,530
Closed -$1M – 623
2014
Q1 		$1M Buy
+4,530
New +$1.16M 0.03% 396

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

Driehaus Capital Management's TNDM Position: Q2 2026 in Review

Driehaus Capital Management reduced its Tandem Diabetes Care (TNDM) stake by 22% in Q2 2026, selling an estimated $9.04M and leaving 1,786,996 shares worth $27M. The position accounts for 0.16% of the portfolio, ranked #191.

Driehaus Capital Management first reported a position in TNDM in Q1 2014 and has held it in 20 quarters since. The position peaked at $46.7M in Q1 2024. 274 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

  • Driehaus Capital Management held 1,786,996 shares of Tandem Diabetes Care worth $27M as of Q2 2026.
  • Driehaus Capital Management sold 517,418 Tandem Diabetes Care shares in Q2 2026, an estimated $9.04M.
  • Tandem Diabetes Care made up 0.16% of Driehaus Capital Management's portfolio in Q2 2026, its #191 holding.
  • Driehaus Capital Management first reported a position in Tandem Diabetes Care in Q1 2014 and has held it in 20 quarters since.
  • Driehaus Capital Management's Tandem Diabetes Care position peaked at $46.7M in Q1 2024.
  • 274 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on Driehaus Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.