XT
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XTX Topco’s Tandem Diabetes Care TNDM Stock Holding History

XTX Topco’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 		$3.21M Buy
212,976
+152,155
+250% +$2.66M 0.04% 688
2026
Q1 		$1.17M Buy
+60,821
New +$1.32M 0.02% 1286
2025
Q4 		– Sell
-73,545
Closed -$893K – 3800
2025
Q3 		$893K Buy
73,545
+54,752
+291% +$741K 0.05% 655
2025
Q2 		$350K Buy
+18,793
New +$372K 0.01% 1327
2025
Q1 		– Sell
-7,490
Closed -$270K – 3115
2024
Q4 		$270K Buy
7,490
+2,273
+44% +$76.9K 0.02% 1308
2024
Q3 		$221K Sell
5,217
-5,550
-52% -$235K 0.02% 1379
2024
Q2 		$434K Buy
10,767
+3,072
+40% +$128K 0.04% 729
2024
Q1 		$272K Buy
+7,695
New +$206K 0.04% 932
2023
Q4 		– Sell
-25,521
Closed -$530K – 2152
2023
Q3 		$530K Sell
25,521
-16,518
-39% -$454K 0.09% 363
2023
Q2 		$1.03M Buy
+42,039
New +$1.35M 0.18% 78
2021
Q4 		– Sell
-2,232
Closed -$266K – 1002
2021
Q3 		$266K Sell
2,232
-619
-22% -$68.2K 0.09% 382
2021
Q2 		$278K Buy
+2,851
New +$254K 0.09% 402

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

XTX Topco's TNDM Position: Q2 2026 in Review

XTX Topco increased its Tandem Diabetes Care (TNDM) stake by 250% in Q2 2026, buying an estimated $2.66M and bringing the position to 212,976 shares worth $3.21M. The position accounts for 0.04% of the portfolio, ranked #688.

XTX Topco first reported a position in TNDM in Q2 2021 and has held it in 12 quarters since. 274 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

  • XTX Topco held 212,976 shares of Tandem Diabetes Care worth $3.21M as of Q2 2026.
  • XTX Topco bought 152,155 Tandem Diabetes Care shares in Q2 2026, an estimated $2.66M.
  • Tandem Diabetes Care made up 0.04% of XTX Topco's portfolio in Q2 2026, its #688 holding.
  • XTX Topco first reported a position in Tandem Diabetes Care in Q2 2021 and has held it in 12 quarters since.
  • 274 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.