Polar Capital Holdings’s Rhythm Pharmaceuticals RYTM Stock Holding History

Polar Capital Holdings’s Portfolio RYTM Stock Details RYTM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$141M	Buy	1,615,586 +430,194	+36%	+$41.8M	0.5%	52
2025 Q4	$127M	Sell	1,185,392 -59,540	-5%	-$6.32M	0.49%	55
2025 Q3	$126M	Sell	1,244,932 -5,938	-0.5%	-$551K	0.61%	50
2025 Q2	$79M	Buy	1,250,870 +750,870	+150%	+$46M	0.41%	66
2025 Q1	$26.5M	Sell	500,000 -1,000,000	-67%	-$55.5M	0.16%	129
2024 Q4	$84M	Hold	1,500,000	–	–	0.47%	59
2024 Q3	$78.6M	Hold	1,500,000	–	–	0.37%	60
2024 Q2	$61.6M	Hold	1,500,000	–	–	0.36%	73
2024 Q1	$65M	Sell	1,500,000 -250,000	-14%	-$10.9M	0.34%	72
2023 Q4	$80.4M	Sell	1,750,000 -750,000	-30%	-$23.7M	0.49%	55
2023 Q3	$57.3M	Buy	2,500,000 +250,000	+11%	+$5.6M	0.42%	69
2023 Q2	$37.1M	Buy	2,250,000 +500,000	+29%	+$9.03M	0.19%	103
2023 Q1	$31.2M	Buy	1,750,000 +500,000	+40%	+$12.6M	0.2%	112
2022 Q4	$36.4M	Buy	1,250,000 +535,261	+75%	+$13.8M	0.29%	104
2022 Q3	$17.5K	Buy	+714,739	New	+$13.3M	0.11%	154

Other funds holding RYTM

RCM

RA Capital Management Boston, Massachusetts $9.44B AUM 157.3% 1-Year Est. Return

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

BBA

Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Perceptive Advisors New York $5.12B AUM 314.02% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return

Polar Capital Holdings's RYTM Position: Q1 2026 in Review

Polar Capital Holdings increased its Rhythm Pharmaceuticals (RYTM) stake by 36% in Q1 2026, buying an estimated $41.8M and bringing the position to 1,615,586 shares worth $141M. The position accounts for 0.5% of the portfolio, ranked #52.

Polar Capital Holdings first reported a position in RYTM in Q3 2022 and has held it in 15 quarters since. 285 funds tracked by Wall St. Rank hold RYTM as of Q1 2026.

Polar Capital Holdings held 1,615,586 shares of Rhythm Pharmaceuticals worth $141M as of Q1 2026.
Polar Capital Holdings bought 430,194 Rhythm Pharmaceuticals shares in Q1 2026, an estimated $41.8M.
Rhythm Pharmaceuticals made up 0.5% of Polar Capital Holdings's portfolio in Q1 2026, its #52 holding.
Polar Capital Holdings first reported a position in Rhythm Pharmaceuticals in Q3 2022 and has held it in 15 quarters since.
285 funds tracked by Wall St. Rank held Rhythm Pharmaceuticals as of Q1 2026.

Based on Polar Capital Holdings's 13F filing for Q1 2026, filed 15 May 2026.