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Oberweis Asset Management’s iRhythm Holdings IRTC Stock Holding History

Oberweis Asset Management’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 		$18.4M Buy
156,004
+36,304
+30% +$5.24M 0.54% 68
2025
Q4 		$21.2M Buy
119,700
+38,500
+47% +$6.82M 0.78% 45
2025
Q3 		$14M Hold
81,200
– – 0.53% 72
2025
Q2 		$12.5M Buy
+81,200
New +$10.5M 0.54% 71
2019
Q4 		– Sell
-3,700
Closed -$274K – 210
2019
Q3 		$274K Sell
3,700
-50,940
-93% -$3.95M 0.06% 174
2019
Q2 		$4.32M Sell
54,640
-6,070
-10% -$442K 0.79% 30
2019
Q1 		$4.55M Buy
+60,710
New +$5.19M 0.91% 32

Other funds holding IRTC

BlackRock
BlackRock New York $5.7T 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 $134B AUM 35.51% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $61.3B 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 $41.3B 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