Question 1

How many shares of RYTM does RA CAPITAL MANAGEMENT, L.P. own?

Accepted Answer

As of 2026-Q2, RA CAPITAL MANAGEMENT, L.P. holds 6.7M shares of RYTM (RHYTHM PHARMACEUTICALS INC).

Question 2

What is RA CAPITAL MANAGEMENT, L.P.'s RYTM position worth?

Accepted Answer

As of 2026-Q2, RA CAPITAL MANAGEMENT, L.P.'s RYTM position is worth $740.2M.

Question 3

When did RA CAPITAL MANAGEMENT, L.P. first buy RYTM?

Accepted Answer

Based on available 13F filings, RA CAPITAL MANAGEMENT, L.P. first reported a position in RYTM in 2024-Q3. They have held the position across 31 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Unchanged	6.7M	0.0%	$740.2M	6.4%	$111.03	0
2026-Q1	Unchanged	6.7M	0.0%	$579.8M	6.1%	$89.56	0
2025-Q4	Increased	6.7M	+17.4%	$713.6M	7.3%	$106.76	72
2025-Q3	Increased	5.7M	+2.2%	$573.8M	7.1%	$100.64	62
2025-Q2	Decreased	5.6M	-8.6%	$351.4M	5.9%	$62.73	0
2025-Q1	Unchanged	6.1M	0.0%	$322.3M	5.4%	$54.80	0
2024-Q4	Unchanged	6.1M	0.0%	$340.6M	4.5%	$56.34	0
2024-Q3	Unchanged	6.1M	0.0%	$318.8M	3.7%	$51.35	0