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

Oppenheimer 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 		$619K Buy
41,009
+218
+0.5% +$3.81K 0.01% 837
2026
Q1 		$782K Buy
40,791
+2,851
+8% +$61.9K 0.01% 782
2025
Q4 		$834K Sell
37,940
-3,555
-9% -$64.2K 0.01% 717
2025
Q3 		$504K Sell
41,495
-12,546
-23% -$170K 0.01% 897
2025
Q2 		$1.01M Sell
54,041
-18,711
-26% -$371K 0.01% 748
2025
Q1 		$1.39M Buy
72,752
+11,048
+18% +$323K 0.02% 633
2024
Q4 		$2.22M Buy
61,704
+2,612
+4% +$88.4K 0.03% 498
2024
Q3 		$2.51M Buy
59,092
+9,899
+20% +$420K 0.03% 478
2024
Q2 		$1.98M Buy
49,193
+8,813
+22% +$368K 0.03% 525
2024
Q1 		$1.43M Buy
40,380
+13,277
+49% +$356K 0.02% 588
2023
Q4 		$802K Buy
+27,103
New +$562K 0.01% 767
2023
Q2 		– Sell
-5,259
Closed -$214K – 1164
2023
Q1 		$214K Buy
+5,259
New +$218K ﹤0.01% 1040
2020
Q1 		– Sell
-296
Closed -$18K – 1634
2019
Q4 		$18K Sell
296
-91
-24% -$5.61K ﹤0.01% 1463
2019
Q3 		$23K Buy
387
+31
+9% +$1.98K ﹤0.01% 1448
2019
Q2 		$23K Buy
356
+102
+40% +$6.58K ﹤0.01% 1464
2019
Q1 		$16K Sell
254
-112
-31% -$5.88K ﹤0.01% 1472
2018
Q4 		$14K Buy
+366
New +$12.9K ﹤0.01% 1492
2017
Q2 		– Sell
-2
Closed – – 1723
2017
Q1 		$0 Buy
+2
New +$44 ﹤0.01% 1697

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

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

Oppenheimer Asset Management increased its Tandem Diabetes Care (TNDM) stake by 0.53% in Q2 2026, buying an estimated $3.81K and bringing the position to 41,009 shares worth $619K. The position accounts for 0.01% of the portfolio, ranked #837.

Oppenheimer Asset Management first reported a position in TNDM in Q1 2017 and has held it in 18 quarters since. The position peaked at $2.51M in Q3 2024. 274 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

  • Oppenheimer Asset Management held 41,009 shares of Tandem Diabetes Care worth $619K as of Q2 2026.
  • Oppenheimer Asset Management bought 218 Tandem Diabetes Care shares in Q2 2026, an estimated $3.81K.
  • Tandem Diabetes Care made up 0.01% of Oppenheimer Asset Management's portfolio in Q2 2026, its #837 holding.
  • Oppenheimer Asset Management first reported a position in Tandem Diabetes Care in Q1 2017 and has held it in 18 quarters since.
  • Oppenheimer Asset Management's Tandem Diabetes Care position peaked at $2.51M in Q3 2024.
  • 274 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on Oppenheimer Asset Management's 13F filing for Q2 2026, filed 3 Aug 2026.