Company · Ownership research

RHYTHM PHARMACEUTICALS, INC. RYTM

CIK 0001649904 · CUSIP 76243J105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 76243J105 (RYTM), not CUSIP 76243J955 (RYTM), CUSIP 76243J905 (RYTM), and does not merge CUSIPs.

This page lists the top 20 of 178 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	PRIMECAP MANAGEMENT CO/CA/ CIK 763212 · View history	$378.09M 7,216,911 shares	0.28%	-95.48K(-1.30%)Reduced	SEC filing ↗ Nov 8, 2024	▾
02	BlackRock, Inc. CIK 2012383 · View history	$360.93M 6,889,258 shares	0.01%	—	SEC filing ↗ Nov 13, 2024	▾
03	BAKER BROS. ADVISORS LP CIK 1263508 · View history	$335.21M 6,398,366 shares	3.47%	+1(0.00%)Added	SEC filing ↗ Nov 14, 2024	▾
04	RA CAPITAL MANAGEMENT, L.P. CIK 1346824 · View history	$318.76M 6,084,412 shares	3.68%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
05	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$203.26M 3,879,796 shares	0.04%	-1.41M(-26.60%)Reduced	SEC filing ↗ Nov 14, 2024	▾
06	PERCEPTIVE ADVISORS LLC CIK 1224962 · View history	$186.52M 3,560,214 shares	4.00%	+113.64K(+3.30%)Added	SEC filing ↗ Nov 14, 2024	▾
07	VANGUARD GROUP INC CIK 102909 · View history	$180.64M 3,447,911 shares	0.00%	+87.22K(+2.60%)Added	SEC filing ↗ Nov 13, 2024	▾
08	NEA Management Company, LLC CIK 1512848 · View history	$152.45M 2,909,956 shares	8.31%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
09	Frazier Life Sciences Management, L.P. CIK 1892134 · View history	$126.62M 2,416,952 shares	5.08%	+45.65K(+1.90%)Added	SEC filing ↗ Nov 15, 2024	▾
10	STATE STREET CORP CIK 93751 · View history	$104.42M 1,993,166 shares	0.00%	-10.72K(-0.50%)Reduced	SEC filing ↗ Nov 14, 2024	▾
11	FEDERATED HERMES, INC. CIK 1056288 · View history	$87.17M 1,663,900 shares	0.19%	+3.12K(+0.20%)Added	SEC filing ↗ Nov 13, 2024	▾
12	Polar Capital Holdings Plc CIK 1837309 · View history	$78.58M 1,500,000 shares	0.38%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
13	Driehaus Capital Management LLC CIK 938206 · View history	$68.08M 1,299,490 shares	0.58%	+117.12K(+9.90%)Added	SEC filing ↗ Nov 14, 2024	▾
14	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$65.82M 1,256,188 shares	0.01%	+3.50K(+0.30%)Added	SEC filing ↗ Nov 12, 2024	▾
15	Rock Springs Capital Management LP CIK 1595725 · View history	$64.34M 1,228,093 shares	2.09%	-52.40K(-4.10%)Reduced	SEC filing ↗ Nov 14, 2024	▾
16	ALKEON CAPITAL MANAGEMENT LLC CIK 1230239 · View history	$61.18M 1,167,700 shares	0.34%	+167.70K(+16.80%)Added	SEC filing ↗ Nov 14, 2024	▾
17	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND CIK 1535845 · View history	$58.21M 1,111,043 shares	0.14%	+143.80K(+14.90%)Added	SEC filing ↗ Nov 13, 2024	▾
18	Checkpoint Capital L.P. CIK 1977548 · View history	$34.75M 663,381 shares	17.24%	-258.72K(-28.10%)Reduced	SEC filing ↗ Nov 14, 2024	▾
19	COMMODORE CAPITAL LP CIK 1831942 · View history	$34.05M 650,000 shares	2.13%	-575.00K(-46.90%)Reduced	SEC filing ↗ Nov 14, 2024	▾
20	LOOMIS SAYLES & CO L P CIK 312348 · View history	$33.35M 636,628 shares	0.04%	+636.63KNew	SEC filing ↗ Nov 13, 2024	▾

Showing 20 / 178 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

178

Cancelled or null records excluded

Disclosed shares

67,700,039

Not deduplicated across managers

Disclosed value

$3.55B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

RHYTHM PHARMACEUTICALS, INC. · Q3 2024

Explore all 178 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.