Optiver Holding
TNDM icon

Optiver Holding’s Tandem Diabetes Care TNDM Stock Holding History

Optiver Holding’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 		$6.55K Buy
434
+426
+5,325% +$7.44K ﹤0.01% 1879
2026
Q1 		$153 Buy
+8
New +$174 ﹤0.01% 2230
2025
Q4 		– Sell
-460
Closed -$5.58K – 2997
2025
Q3 		$5.58K Buy
+460
New +$6.23K ﹤0.01% 1653

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

Optiver Holding's TNDM Position: Q2 2026 in Review

Optiver Holding increased its Tandem Diabetes Care (TNDM) stake by 5,325% in Q2 2026, buying an estimated $7.44K and bringing the position to 434 shares worth $6.55K. The position accounts for ﹤0.01% of the portfolio, ranked #1879.

Optiver Holding first reported a position in TNDM in Q3 2025 and has held it in 3 quarters since. 273 funds tracked by Wall St. Rank hold TNDM as of Q2 2026.

  • Optiver Holding held 434 shares of Tandem Diabetes Care worth $6.55K as of Q2 2026.
  • Optiver Holding bought 426 Tandem Diabetes Care shares in Q2 2026, an estimated $7.44K.
  • Tandem Diabetes Care made up ﹤0.01% of Optiver Holding's portfolio in Q2 2026, its #1879 holding.
  • Optiver Holding first reported a position in Tandem Diabetes Care in Q3 2025 and has held it in 3 quarters since.
  • 273 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q2 2026.

Based on Optiver Holding's 13F filing for Q2 2026, filed 12 Aug 2026.