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Gilder Gagnon Howe & Co’s Tandem Diabetes Care TNDM Stock Holding History

Gilder Gagnon Howe & Co’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
2025
Q1 		– Sell
-931,894
Closed -$33.6M – 265
2024
Q4 		$33.6M Buy
931,894
+58,920
+7% +$1.99M 0.36% 67
2024
Q3 		$37M Sell
872,974
-155,659
-15% -$6.6M 0.44% 58
2024
Q2 		$41.4M Buy
1,028,633
+131,245
+15% +$5.48M 0.52% 50
2024
Q1 		$31.8M Buy
897,388
+879,312
+4,865% +$23.6M 0.4% 61
2023
Q4 		$535K Buy
+18,076
New +$375K 0.01% 224
2023
Q3 		– Sell
-2,710
Closed -$66.5K – 309
2023
Q2 		$66.5K Buy
+2,710
New +$87.2K ﹤0.01% 287
2022
Q4 		– Sell
-215,980
Closed -$10.3M – 264
2022
Q3 		$10.3M Sell
215,980
-126,493
-37% -$6.93M 0.18% 102
2022
Q2 		$20.3M Sell
342,473
-403,851
-54% -$33.2M 0.36% 79
2022
Q1 		$86.8M Sell
746,324
-22,582
-3% -$2.64M 0.8% 37
2021
Q4 		$116M Sell
768,906
-12,100
-2% -$1.63M 0.66% 48
2021
Q3 		$93.2M Sell
781,006
-9,561
-1% -$1.05M 0.48% 62
2021
Q2 		$77M Buy
790,567
+9,108
+1% +$812K 0.38% 71
2021
Q1 		$69M Sell
781,459
-609,058
-44% -$56.6M 0.37% 79
2020
Q4 		$133M Sell
1,390,517
-9,844
-0.7% -$1.01M 0.66% 46
2020
Q3 		$159M Sell
1,400,361
-21,696
-2% -$2.28M 0.98% 25
2020
Q2 		$141M Buy
1,422,057
+155,311
+12% +$12.4M 1.1% 24
2020
Q1 		$81.5M Buy
1,266,746
+35,180
+3% +$2.46M 0.98% 29
2019
Q4 		$73.4M Buy
1,231,566
+604,955
+97% +$37.3M 0.76% 50
2019
Q3 		$37M Sell
626,611
-8,468
-1% -$541K 0.42% 72
2019
Q2 		$41M Buy
635,079
+98,425
+18% +$6.35M 0.41% 73
2019
Q1 		$34.1M Buy
536,654
+418,388
+354% +$22M 0.36% 75
2018
Q4 		$4.49M Buy
118,266
+114,215
+2,819% +$4.03M 0.06% 156
2018
Q3 		$174K Buy
+4,051
New +$141K ﹤0.01% 262
2016
Q2 		– Sell
-729
Closed -$63K – 284
2016
Q1 		$63K Buy
+729
New +$63.8K ﹤0.01% 221
2014
Q1 		– Sell
-1,149
Closed -$296K – 280
2013
Q4 		$296K Buy
+1,149
New +$263K ﹤0.01% 234

Other funds holding TNDM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
SC
Sessa Capital New York $5.51B AUM 47.23% 1-Year Est. Return
GKIM
GW&K Investment Management Boston, Massachusetts $11.3B AUM 31.98% 1-Year Est. Return
ACH
ArrowMark Colorado Holdings Denver, Colorado $3.76B AUM 21.77% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
HRCM
Hood River Capital Management Palm Beach Gardens, Florida $9.98B AUM 145.42% 1-Year Est. Return
SIMG
Stephens Investment Management Group Houston, Texas $7.3B AUM 41.96% 1-Year Est. Return
PIM
Paradice Investment Management Denver, Colorado $532M AUM 29.6% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Gilder Gagnon Howe & Co's TNDM Position: Q1 2025 in Review

Gilder Gagnon Howe & Co sold out of Tandem Diabetes Care (TNDM) in Q1 2025, closing a stake of 931,894 shares — an estimated $33.6M sold.

Gilder Gagnon Howe & Co first reported a position in TNDM in Q4 2013 and held it in 25 quarters. The position peaked at $159M in Q3 2020. 275 funds tracked by Wall St. Rank hold TNDM as of Q1 2025.

  • Gilder Gagnon Howe & Co reported no remaining Tandem Diabetes Care position as of Q1 2025 after selling out during the quarter.
  • Gilder Gagnon Howe & Co sold 931,894 Tandem Diabetes Care shares in Q1 2025, an estimated $33.6M.
  • Gilder Gagnon Howe & Co first reported a position in Tandem Diabetes Care in Q4 2013 and held it in 25 quarters.
  • Gilder Gagnon Howe & Co's Tandem Diabetes Care position peaked at $159M in Q3 2020.
  • 275 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2025.

Based on Gilder Gagnon Howe & Co's 13F filing for Q1 2025, filed 15 May 2025.