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Headlands Technologies’s iRhythm Holdings IRTC Stock Holding History

Headlands Technologies’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 		$541K Sell
4,581
-2,104
-31% -$304K 0.06% 341
2025
Q4 		$1.19M Buy
+6,685
New +$1.18M 0.1% 235
2024
Q4 		– Sell
-2,991
Closed -$222K – 1384
2024
Q3 		$222K Buy
+2,991
New +$238K 0.03% 502
2024
Q2 		– Sell
-430
Closed -$49.9K – 1365
2024
Q1 		$49.9K Buy
430
+426
+10,650% +$47.9K 0.01% 714
2023
Q4 		$428 Sell
4
-760
-99% -$66.2K ﹤0.01% 910
2023
Q3 		$72K Sell
764
-936
-55% -$95.2K 0.04% 377
2023
Q2 		$177K Buy
+1,700
New +$204K 0.06% 303

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

Headlands Technologies's IRTC Position: Q1 2026 in Review

Headlands Technologies reduced its iRhythm Holdings (IRTC) stake by 31% in Q1 2026, selling an estimated $304K and leaving 4,581 shares worth $541K. The position accounts for 0.06% of the portfolio, ranked #341.

Headlands Technologies first reported a position in IRTC in Q2 2023 and has held it in 7 quarters since. The position peaked at $1.19M in Q4 2025. 304 funds tracked by Wall St. Rank hold IRTC as of Q1 2026.

  • Headlands Technologies held 4,581 shares of iRhythm Holdings worth $541K as of Q1 2026.
  • Headlands Technologies sold 2,104 iRhythm Holdings shares in Q1 2026, an estimated $304K.
  • iRhythm Holdings made up 0.06% of Headlands Technologies's portfolio in Q1 2026, its #341 holding.
  • Headlands Technologies first reported a position in iRhythm Holdings in Q2 2023 and has held it in 7 quarters since.
  • Headlands Technologies's iRhythm Holdings position peaked at $1.19M in Q4 2025.
  • 304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q1 2026.

Based on Headlands Technologies's 13F filing for Q1 2026, filed 13 May 2026.