Holocene Advisors
IRTC icon

Holocene Advisors’s iRhythm Holdings IRTC Stock Holding History

Holocene Advisors’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
2019
Q4 		– Sell
-100,000
Closed -$7.41M – 723
2019
Q3 		$7.41M Buy
+100,000
New +$7.75M 0.08% 142

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

Holocene Advisors's IRTC Position: Q2 2026 in Review

Holocene Advisors reduced its iRhythm Holdings (IRTC) stake by 37% in Q2 2026, selling an estimated $54.1M and leaving 783,636 shares worth $93.2M. The position accounts for 0.21% of the portfolio, ranked #131.

Holocene Advisors first reported a position in IRTC in Q3 2019 and has held it in 28 quarters since. The position peaked at $147M in Q1 2026. 304 funds tracked by Wall St. Rank hold IRTC as of Q2 2026.

  • Holocene Advisors held 783,636 shares of iRhythm Holdings worth $93.2M as of Q2 2026.
  • Holocene Advisors sold 465,022 iRhythm Holdings shares in Q2 2026, an estimated $54.1M.
  • iRhythm Holdings made up 0.21% of Holocene Advisors's portfolio in Q2 2026, its #131 holding.
  • Holocene Advisors first reported a position in iRhythm Holdings in Q3 2019 and has held it in 28 quarters since.
  • Holocene Advisors's iRhythm Holdings position peaked at $147M in Q1 2026.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q2 2026.

Based on Holocene Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.