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

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

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

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

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

Based on available 13F filings, RA CAPITAL MANAGEMENT, L.P. first reported a position in RYTM in 2018-Q4. They have held the position across 31 quarters.

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RA CAPITAL MANAGEMENT, L.P.

RYTM
31 quarters

Position history for RA CAPITAL MANAGEMENT, L.P.'s holdings in RHYTHM PHARMACEUTICALS INC

Current Value

$740.2M

Current Shares

6.7M

Total Value Change

+$687.8M

Total Shares Change

+4.7M

Quarter-by-Quarter History

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
2024-Q2	Increased	6.1M	+14.2%	$249.8M	3.3%	$41.06	64
2024-Q1	Unchanged	5.3M	0.0%	$231M	2.9%	$43.33	0
2023-Q4	Decreased	5.3M	-6.1%	$245M	3.8%	$45.97	0
2023-Q3	Unchanged	5.7M	0.0%	$130.1M	2.6%	$22.92	0
2023-Q2	Increased	5.7M	+2.9%	$93.6M	1.8%	$16.71	48
2023-Q1	Unchanged	5.5M	0.0%	$98.4M	2.2%	$17.66	0
2022-Q4	Increased	5.5M	+0.8%	$160.6M	3.3%	$29.12	56
2022-Q3	Increased	5.5M	+12.3%	$134M	2.9%	$23.87	58
2022-Q2	Unchanged	4.9M	0.0%	$20.2M	0.5%	$4.27	0
2022-Q1	Unchanged	4.9M	0.0%	$56.1M	1.2%	$11.35	0
2021-Q4	Unchanged	4.9M	0.0%	$48.6M	0.9%	$10.63	0
2021-Q3	Unchanged	4.9M	0.0%	$63.6M	0.9%	$13.19	0
2021-Q2	Unchanged	4.9M	0.0%	$71.1M	1.1%	$20.14	0
2021-Q1	Increased	4.9M	+16.6%	$103.6M	1.6%	$20.33	55
2020-Q4	Decreased	4.2M	-18.7%	$124.2M	1.7%	$29.98	0
2020-Q3	Decreased	5.1M	-1.3%	$111.4M	2.0%	$22.27	0
2020-Q2	Decreased	5.2M	-3.9%	$116.2M	2.3%	$21.79	0
2020-Q1	Unchanged	5.4M	0.0%	$82.5M	2.6%	$14.50	0
2019-Q4	Increased	5.4M	+58.4%	$124.5M	3.8%	$22.97	80
2019-Q3	Increased	3.4M	+81.6%	$73.9M	4.4%	$21.19	85
2019-Q2	Unchanged	1.9M	0.0%	$41.5M	2.2%	$22.00	0
2019-Q1	Decreased	1.9M	-3.4%	$51.7M	2.2%	$27.41	0
2018-Q4	New	2M	-	$52.4M	3.1%	$27.03	82

Other major holders of RYTM: BlackRock, Inc., VANGUARD GROUP INC, BAKER BROS. ADVISORS LP

RYTM31 quarters

RYTM
31 quarters