Optiver Holding
IRTC icon

Optiver Holding’s iRhythm Holdings IRTC Stock Holding History

Optiver Holding’s Portfolio IRTC Stock Details IRTC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$19.1K Buy
162
+24
+17% +$3.46K ﹤0.01% 1107
2025
Q4 		$24.5K Sell
138
-66
-32% -$11.7K ﹤0.01% 998
2025
Q3 		$35.1K Buy
+204
New +$32.4K ﹤0.01% 848

Other funds holding IRTC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
RI
RTW Investments New York $10B AUM 135.35% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Holocene Advisors
Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Optiver Holding's IRTC Position: Q1 2026 in Review

Optiver Holding increased its iRhythm Holdings (IRTC) stake by 17% in Q1 2026, buying an estimated $3.46K and bringing the position to 162 shares worth $19.1K. The position accounts for ﹤0.01% of the portfolio, ranked #1107.

Optiver Holding first reported a position in IRTC in Q3 2025 and has held it in 3 quarters since. The position peaked at $35.1K in Q3 2025. 304 funds tracked by Wall St. Rank hold IRTC as of Q1 2026.

  • Optiver Holding held 162 shares of iRhythm Holdings worth $19.1K as of Q1 2026.
  • Optiver Holding bought 24 iRhythm Holdings shares in Q1 2026, an estimated $3.46K.
  • iRhythm Holdings made up ﹤0.01% of Optiver Holding's portfolio in Q1 2026, its #1107 holding.
  • Optiver Holding first reported a position in iRhythm Holdings in Q3 2025 and has held it in 3 quarters since.
  • Optiver Holding's iRhythm Holdings position peaked at $35.1K in Q3 2025.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q1 2026.

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