Adage Capital Partners
TNDM icon

Adage Capital Partners’s Tandem Diabetes Care TNDM Stock Holding History

Adage Capital Partners’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
Q1 		– Sell
-182,995
Closed -$4.02M – 1075
2025
Q4 		$4.02M Buy
+182,995
New +$3.3M 0.01% 783
2025
Q3 		– Sell
-250,000
Closed -$4.66M – 978
2025
Q2 		$4.66M Buy
+250,000
New +$4.95M 0.01% 712
2024
Q4 		– Sell
-159,604
Closed -$6.77M – 957
2024
Q3 		$6.77M Buy
159,604
+94,604
+146% +$4.01M 0.01% 681
2024
Q2 		$2.62M Sell
65,000
-53,709
-45% -$2.24M ﹤0.01% 766
2024
Q1 		$4.2M Buy
+118,709
New +$3.18M 0.01% 716
2023
Q2 		– Sell
-250,000
Closed -$10.2M – 929
2023
Q1 		$10.2M Buy
250,000
+50,000
+25% +$2.07M 0.02% 613
2022
Q4 		$8.99M Buy
+200,000
New +$9.05M 0.02% 661
2018
Q3 		– Sell
-150,000
Closed -$3.3M – 762
2018
Q2 		$3.3M Buy
+150,000
New +$1.84M 0.01% 676
2017
Q4 		– Sell
-50,000
Closed -$365K – 750
2017
Q3 		$365K Hold
50,000
– – ﹤0.01% 704
2017
Q2 		$400K Sell
50,000
-46,405
-48% -$429K ﹤0.01% 696
2017
Q1 		$1.16M Buy
+96,405
New +$2.11M ﹤0.01% 678

Other funds holding TNDM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
SC
Sessa Capital New York $5.51B AUM 47.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
ACH
ArrowMark Colorado Holdings Denver, Colorado $3.76B AUM 21.77% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
GKIM
GW&K Investment Management Boston, Massachusetts $11.3B AUM 31.98% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

Adage Capital Partners's TNDM Position: Q1 2026 in Review

Adage Capital Partners sold out of Tandem Diabetes Care (TNDM) in Q1 2026, closing a stake of 182,995 shares — an estimated $4.02M sold.

Adage Capital Partners first reported a position in TNDM in Q1 2017 and held it in 11 quarters. The position peaked at $10.2M in Q1 2023. 272 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

  • Adage Capital Partners reported no remaining Tandem Diabetes Care position as of Q1 2026 after selling out during the quarter.
  • Adage Capital Partners sold 182,995 Tandem Diabetes Care shares in Q1 2026, an estimated $4.02M.
  • Adage Capital Partners first reported a position in Tandem Diabetes Care in Q1 2017 and held it in 11 quarters.
  • Adage Capital Partners's Tandem Diabetes Care position peaked at $10.2M in Q1 2023.
  • 272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

Based on Adage Capital Partners's 13F filing for Q1 2026, filed 15 May 2026.