RHYTHM PHARMACEUTICALS, INC. - Common Stock, $0.001 par value per share (RYTM)

Q: What does CUSIP 76243J105 represent in this 13F holders report?

CUSIP 76243J105 is the security identifier for RYTM - RHYTHM PHARMACEUTICALS, INC. - Common Stock, $0.001 par value per share used to aggregate holder disclosures.

Q: How many institutions held RYTM - RHYTHM PHARMACEUTICALS, INC. - Common Stock, $0.001 par value per share in Q1 2024?

166 institutional investors reported RYTM - RHYTHM PHARMACEUTICALS, INC. - Common Stock, $0.001 par value per share for Q1 2024. Use the holders table for investor-level position and value details.

CUSIP: 76243J105

Q1 2024 13F Holders as of 31 Mar 2024

Security type / class: Equity / Common Stock, $0.001 par value per share
Total 13F shares: 68,030,458
Total 13F value: $2,946,208,413
Share change: +1,346,412
Put/Call ratio: 9.6%
SEC-reported price per share: $43.33
Number of holders: 166
Value change: +$55,358,404
Number of buys: 86
Number of sells: 77
Shares outstanding: 69,012,275

Security key

76243J105

Report period

Q1 2024

Institutions

166

Top holders

RYTM full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 RHYTHM PHARMACEUTICALS, INC. SEC filings RHYTHM PHARMACEUTICALS, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 76243J105

Newer quarter: Q2 2026

Recent filing periods:

Q2 2026

Ownership snapshot

Top reported holders of RYTM - RHYTHM PHARMACEUTICALS, INC. - Common Stock, $0.001 par value per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

PRIMECAP MANAGEMENT CO/CA/

Disclosed value leader

PRIMECAP MANAGEMENT CO/CA/

Comparable rows

15/15

Latest evidence

31 Dec 2023

13F Lead comparable stake: 12% Showing 1-6 of 15 holder rows.

Quick read

PRIMECAP MANAGEMENT CO/CA/ leads the comparable SEC ownership view at 12%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens PRIMECAP MANAGEMENT CO/CA/'s linked filing trail.

Comparable ownership Top 5

PRIMECAP MANAGEMENT CO/CA/ 12%

BAKER BROS. ADVISORS LP 9.3%

BlackRock Finance, Inc. 9.2%

RA CAPITAL MANAGEMENT, L.P. 7.7%

GOLDMAN SACHS GROUP INC 7.3%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
PRIMECAP MANAGEMENT CO/CA/	13F Company 13F	12%	$370,180,229 8,052,648 shares	—	31 Dec 2023
BAKER BROS. ADVISORS LP	13F Company 13F	9.3%	$294,132,839 6,398,365 shares	—	31 Dec 2023
BlackRock Finance, Inc.	13F Company 13F	9.2%	$291,989,948 6,351,750 shares	—	31 Dec 2023
RA CAPITAL MANAGEMENT, L.P.	13F Company 13F	7.7%	$245,039,040 5,330,412 shares	—	31 Dec 2023
GOLDMAN SACHS GROUP INC	13F Company 13F	7.3%	$232,053,526 5,047,934 shares	—	31 Dec 2023
VANGUARD GROUP INC	13F Company 13F	4.7%	$148,342,339 3,226,938 shares	—	31 Dec 2023

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2024

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

166

68,030,458

Rows available

166

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2024 vs Q1 2024 Across Filers

Q1 2024 holders

166

Q1 2024 holders

166

Holder diff

Investor	Q1 2024 Shares	Q1 2024 Shares	Share Diff	Share Chg %	Q1 2024 value	Q1 2024 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend