Atika Capital Management’s iRhythm Holdings IRTC Stock Holding History

Atika Capital 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
2022 Q4	–	Sell	-109,000	Closed	-$13.7M	–	90
2022 Q3	$13.7M	Sell	109,000 -1,000	-0.9%	-$144K	1.16%	35
2022 Q2	$11.9M	Sell	110,000 -26,588	-19%	-$3.52M	1.34%	31
2022 Q1	$21.5M	Buy	+136,588	New	+$17.5M	1.81%	24
2021 Q1	–	Sell	-50,000	Closed	-$11.9M	–	108
2020 Q4	$11.9M	Sell	50,000 -21,000	-30%	-$4.79M	0.93%	52
2020 Q3	$16.9M	Buy	71,000 +31,000	+78%	+$5.48M	1.38%	21
2020 Q2	$4.64M	Sell	40,000 -17,000	-30%	-$1.87M	0.6%	66
2020 Q1	$4.64M	Buy	+57,000	New	+$4.73M	0.89%	38
2019 Q1	–	Sell	-33,500	Closed	-$2.33M	–	85
2018 Q4	$2.33M	Buy	+33,500	New	+$2.54M	0.69%	53
2017 Q4	–	Sell	-61,500	Closed	-$3.19M	–	74
2017 Q3	$3.19M	Buy	+61,500	New	+$2.78M	0.92%	39

Other funds holding IRTC

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Sands Capital Management Arlington, Virginia $25.5B AUM 26.46% 1-Year Est. Return

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

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

Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return

LOM

LTS One Management New York $239M AUM 18.42% 1-Year Est. Return

Mackenzie Financial Toronto Ontario, Ontario, Canada $83.3B AUM 31.19% 1-Year Est. Return

AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

William Blair & Company Chicago, Illinois $34.9B AUM 18.88% 1-Year Est. Return

Atika Capital Management's IRTC Position: Q4 2022 in Review

Atika Capital Management sold out of iRhythm Holdings (IRTC) in Q4 2022, closing a stake of 109,000 shares — an estimated $13.7M sold.

Atika Capital Management first reported a position in IRTC in Q3 2017 and held it in 9 quarters. The position peaked at $21.5M in Q1 2022. 208 funds tracked by Wall St. Rank hold IRTC as of Q4 2022.

Atika Capital Management reported no remaining iRhythm Holdings position as of Q4 2022 after selling out during the quarter.
Atika Capital Management sold 109,000 iRhythm Holdings shares in Q4 2022, an estimated $13.7M.
Atika Capital Management first reported a position in iRhythm Holdings in Q3 2017 and held it in 9 quarters.
Atika Capital Management's iRhythm Holdings position peaked at $21.5M in Q1 2022.
208 funds tracked by Wall St. Rank held iRhythm Holdings as of Q4 2022.

Based on Atika Capital Management's 13F filing for Q4 2022, filed 13 Feb 2023.