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Steve Schonfeld’s Tandem Diabetes Care TNDM Stock Holding History

Steve Schonfeld’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 		$1.96M Buy
+129,567
New +$2.26M 0.01% 1082
2026
Q1 		– Sell
-14,590
Closed -$321K – 2674
2025
Q4 		$321K Sell
14,590
-128,265
-90% -$2.31M ﹤0.01% 1556
2025
Q3 		$1.73M Sell
142,855
-56,901
-28% -$770K 0.01% 1110
2025
Q2 		$3.72M Buy
+199,756
New +$3.96M 0.03% 682
2024
Q3 		– Sell
-12,709
Closed -$512K – 2424
2024
Q2 		$512K Sell
12,709
-53,971
-81% -$2.25M ﹤0.01% 1478
2024
Q1 		$2.36M Buy
66,680
+11,962
+22% +$320K 0.02% 931
2023
Q4 		$1.62M Buy
+54,718
New +$1.14M 0.01% 871
2023
Q3 		– Sell
-42,514
Closed -$1.04M – 2291
2023
Q2 		$1.04M Buy
42,514
+23,012
+118% +$740K 0.01% 955
2023
Q1 		$792K Sell
19,502
-18,695
-49% -$774K 0.01% 1029
2022
Q4 		$1.72M Buy
38,197
+32,888
+619% +$1.49M 0.01% 890
2022
Q3 		$254K Sell
5,309
-40,963
-89% -$2.25M ﹤0.01% 2192
2022
Q2 		$2.74M Buy
46,272
+35,298
+322% +$2.9M 0.03% 653
2022
Q1 		$1.28M Sell
10,974
-6,021
-35% -$703K 0.01% 884
2021
Q4 		$2.56M Sell
16,995
-11,375
-40% -$1.54M 0.02% 638
2021
Q3 		$3.39M Buy
28,370
+5,481
+24% +$604K 0.04% 543
2021
Q2 		$2.23M Buy
+22,889
New +$2.04M 0.02% 675
2020
Q4 		– Sell
-19,358
Closed -$2.2M – 1886
2020
Q3 		$2.2M Buy
19,358
+10,404
+116% +$1.09M 0.04% 486
2020
Q2 		$886K Buy
+8,954
New +$714K 0.02% 634
2020
Q1 		– Sell
-7,389
Closed -$440K – 1525
2019
Q4 		$440K Sell
7,389
-101,909
-93% -$6.28M 0.01% 803
2019
Q3 		$6.45M Buy
109,298
+22,798
+26% +$1.46M 0.19% 140
2019
Q2 		$5.58M Sell
86,500
-204,100
-70% -$13.2M 0.2% 126
2019
Q1 		$18.5M Buy
290,600
+58,613
+25% +$3.08M 0.64% 23
2018
Q4 		$8.81M Sell
231,987
-597,277
-72% -$21.1M 0.34% 65
2018
Q3 		$35.5M Sell
829,264
-207,336
-20% -$7.24M 1.58% 2
2018
Q2 		$22.8M Buy
1,036,600
+36,600
+4% +$450K 1.24% 1
2018
Q1 		$4.96M Buy
+1,000,000
New +$3.22M 0.37% 68

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

Steve Schonfeld's TNDM Position: Q2 2026 in Review

Steve Schonfeld opened a new position in Tandem Diabetes Care (TNDM) in Q2 2026: 129,567 shares worth $1.96M. The stake represents 0.01% of the portfolio and ranks #1082 among its holdings. This is a return to the name: Steve Schonfeld previously reported a position in TNDM as recently as Q4 2025.

Steve Schonfeld first reported a position in TNDM in Q1 2018 and has held it in 26 quarters since. The position peaked at $35.5M in Q3 2018. 272 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

  • Steve Schonfeld held 129,567 shares of Tandem Diabetes Care worth $1.96M as of Q2 2026.
  • Tandem Diabetes Care was a new Steve Schonfeld position in Q2 2026.
  • Tandem Diabetes Care made up 0.01% of Steve Schonfeld's portfolio in Q2 2026, its #1082 holding.
  • Steve Schonfeld first reported a position in Tandem Diabetes Care in Q1 2018 and has held it in 26 quarters since.
  • Steve Schonfeld's Tandem Diabetes Care position peaked at $35.5M in Q3 2018.
  • 272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on Schonfeld Strategic Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.