Vanguard Portfolio Management
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Vanguard Portfolio Management’s Tandem Diabetes Care TNDM Stock Holding History

Vanguard Portfolio 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 		$64.9M Buy
4,299,667
+306,334
+8% +$5.35M ﹤0.01% 1640
2026
Q1 		$76.6M Buy
+3,993,333
New +$86.8M ﹤0.01% 1533

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
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
FGP
Freestone Grove Partners San Francisco, California $15.6B AUM 27.39% 1-Year Est. Return

Vanguard Portfolio Management's TNDM Position: Q2 2026 in Review

Vanguard Portfolio Management increased its Tandem Diabetes Care (TNDM) stake by 7.7% in Q2 2026, buying an estimated $5.35M and bringing the position to 4,299,667 shares worth $64.9M. The position accounts for ﹤0.01% of the portfolio, ranked #1640.

Vanguard Portfolio Management first reported a position in TNDM in Q1 2026 and has held it in 2 quarters since. The position peaked at $76.6M in Q1 2026. 271 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

  • Vanguard Portfolio Management held 4,299,667 shares of Tandem Diabetes Care worth $64.9M as of Q2 2026.
  • Vanguard Portfolio Management bought 306,334 Tandem Diabetes Care shares in Q2 2026, an estimated $5.35M.
  • Tandem Diabetes Care made up ﹤0.01% of Vanguard Portfolio Management's portfolio in Q2 2026, its #1640 holding.
  • Vanguard Portfolio Management first reported a position in Tandem Diabetes Care in Q1 2026 and has held it in 2 quarters since.
  • Vanguard Portfolio Management's Tandem Diabetes Care position peaked at $76.6M in Q1 2026.
  • 271 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on Vanguard Portfolio Management's 13F filing for Q2 2026, filed 13 Aug 2026.