BS
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Banco Santander’s Tandem Diabetes Care TNDM Stock Holding History

Banco Santander’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 		$2.22M Buy
147,200
+133,500
+974% +$2.33M 0.01% 280
2026
Q1 		$263K Buy
+13,700
New +$298K ﹤0.01% 427

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

Banco Santander's TNDM Position: Q2 2026 in Review

Banco Santander increased its Tandem Diabetes Care (TNDM) stake by 974% in Q2 2026, buying an estimated $2.33M and bringing the position to 147,200 shares worth $2.22M. The position accounts for 0.01% of the portfolio, ranked #280.

Banco Santander first reported a position in TNDM in Q1 2026 and has held it in 2 quarters since. 274 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

  • Banco Santander held 147,200 shares of Tandem Diabetes Care worth $2.22M as of Q2 2026.
  • Banco Santander bought 133,500 Tandem Diabetes Care shares in Q2 2026, an estimated $2.33M.
  • Tandem Diabetes Care made up 0.01% of Banco Santander's portfolio in Q2 2026, its #280 holding.
  • Banco Santander first reported a position in Tandem Diabetes Care in Q1 2026 and has held it in 2 quarters since.
  • 274 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on Banco Santander's 13F filing for Q2 2026, filed 29 Jul 2026.