Optiver Holding
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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
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 $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

Optiver Holding's TNDM Position: Q1 2026 in Review

Optiver Holding opened a new position in Tandem Diabetes Care (TNDM) in Q1 2026: 8 shares worth $153. The stake represents ﹤0.01% of the portfolio and ranks #2230 among its holdings. This is a return to the name: Optiver Holding previously reported a position in TNDM as recently as Q3 2025.

Optiver Holding first reported a position in TNDM in Q3 2025 and has held it in 2 quarters since. The position peaked at $5.58K in Q3 2025. 272 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

  • Optiver Holding held 8 shares of Tandem Diabetes Care worth $153 as of Q1 2026.
  • Tandem Diabetes Care was a new Optiver Holding position in Q1 2026.
  • Tandem Diabetes Care made up ﹤0.01% of Optiver Holding's portfolio in Q1 2026, its #2230 holding.
  • Optiver Holding first reported a position in Tandem Diabetes Care in Q3 2025 and has held it in 2 quarters since.
  • Optiver Holding's Tandem Diabetes Care position peaked at $5.58K in Q3 2025.
  • 272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

Based on Optiver Holding's 13F filing for Q1 2026, filed 15 May 2026.