Next Century Growth Investors’s iRhythm Holdings IRTC Stock Holding History

Next Century Growth Investors’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	$20M	Sell	169,306 -3,532	-2%	-$510K	1.45%	24
2025 Q4	$30.7M	Sell	172,838 -16,244	-9%	-$2.88M	2.13%	7
2025 Q3	$32.5M	Sell	189,082 -35,781	-16%	-$5.69M	2.37%	9
2025 Q2	$34.6M	Buy	224,863 +16,643	+8%	+$2.15M	2.67%	4
2025 Q1	$21.8M	Buy	+208,220	New	+$22.1M	1.94%	10
2021 Q1	–	Sell	-36,290	Closed	-$8.61M	–	133
2020 Q4	$8.61M	Sell	36,290 -3,379	-9%	-$770K	0.73%	49
2020 Q3	$9.45M	Sell	39,669 -13,275	-25%	-$2.35M	0.98%	38
2020 Q2	$6.13M	Sell	52,944 -189	-0.4%	-$20.8K	0.7%	52
2020 Q1	$4.32M	Sell	53,133 -8	-0%	-$663	0.7%	44
2019 Q4	$3.62M	Sell	53,141 -43,776	-45%	-$2.97M	0.47%	65
2019 Q3	$7.18M	Sell	96,917 -39,243	-29%	-$3.04M	1.16%	29
2019 Q2	$10.8M	Buy	136,160 +12,171	+10%	+$886K	1.34%	23
2019 Q1	$9.29M	Sell	123,989 -15,157	-11%	-$1.3M	1.24%	25
2018 Q4	$9.67M	Buy	139,146 +27,875	+25%	+$2.11M	1.38%	16
2018 Q3	$10.5M	Sell	111,271 -49,173	-31%	-$4.28M	1.22%	29
2018 Q2	$13M	Sell	160,444 -149,750	-48%	-$10.5M	1.66%	14
2018 Q1	$19.5M	Sell	310,194 -80,232	-21%	-$4.97M	2.61%	2
2017 Q4	$21.9M	Sell	390,426 -23,429	-6%	-$1.22M	2.72%	4
2017 Q3	$21.5M	Sell	413,855 -150,015	-27%	-$6.79M	2.58%	5
2017 Q2	$24M	Buy	563,870 +394,847	+234%	+$14.4M	2.3%	4
2017 Q1	$6.36M	Buy	169,023 +68,244	+68%	+$2.35M	0.54%	70
2016 Q4	$3.02M	Buy	+100,779	New	+$2.72M	0.19%	114

Other funds holding IRTC

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

RTW Investments New York $10B AUM 135.35% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return

UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Next Century Growth Investors's IRTC Position: Q1 2026 in Review

Next Century Growth Investors reduced its iRhythm Holdings (IRTC) stake by 2% in Q1 2026, selling an estimated $510K and leaving 169,306 shares worth $20M. The position accounts for 1.45% of the portfolio, ranked #24.

Next Century Growth Investors first reported a position in IRTC in Q4 2016 and has held it in 22 quarters since. The position peaked at $34.6M in Q2 2025. 304 funds tracked by Wall St. Rank hold IRTC as of Q1 2026.

Next Century Growth Investors held 169,306 shares of iRhythm Holdings worth $20M as of Q1 2026.
Next Century Growth Investors sold 3,532 iRhythm Holdings shares in Q1 2026, an estimated $510K.
iRhythm Holdings made up 1.45% of Next Century Growth Investors's portfolio in Q1 2026, its #24 holding.
Next Century Growth Investors first reported a position in iRhythm Holdings in Q4 2016 and has held it in 22 quarters since.
Next Century Growth Investors's iRhythm Holdings position peaked at $34.6M in Q2 2025.
304 funds tracked by Wall St. Rank held iRhythm Holdings as of Q1 2026.

Based on Next Century Growth Investors's 13F filing for Q1 2026, filed 14 May 2026.