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Ossiam’s iRhythm Holdings IRTC Stock Holding History

Ossiam’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
Q2 		$630K Buy
+5,300
New +$616K 0.01% 477
2025
Q4 		– Sell
-27,100
Closed -$4.66M – 522
2025
Q3 		$4.66M Buy
+27,100
New +$4.31M 0.06% 214

Other funds holding IRTC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
RI
RTW Investments New York $11.7B AUM 174.13% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $550B AUM 43.33% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
EAM
Eventide Asset Management Boston, Massachusetts $7.48B AUM 104.76% 1-Year Est. Return

Ossiam's IRTC Position: Q2 2026 in Review

Ossiam opened a new position in iRhythm Holdings (IRTC) in Q2 2026: 5,300 shares worth $630K. The stake represents 0.01% of the portfolio and ranks #477 among its holdings. This is a return to the name: Ossiam previously reported a position in IRTC as recently as Q3 2025.

Ossiam first reported a position in IRTC in Q3 2025 and has held it in 2 quarters since. The position peaked at $4.66M in Q3 2025. 303 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Ossiam held 5,300 shares of iRhythm Holdings worth $630K as of Q2 2026.
  • iRhythm Holdings was a new Ossiam position in Q2 2026.
  • iRhythm Holdings made up 0.01% of Ossiam's portfolio in Q2 2026, its #477 holding.
  • Ossiam first reported a position in iRhythm Holdings in Q3 2025 and has held it in 2 quarters since.
  • Ossiam's iRhythm Holdings position peaked at $4.66M in Q3 2025.
  • 303 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Ossiam's 13F filing for Q2 2026, filed 13 Aug 2026.