RHYTHM PHARMACEUTICALS INC

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RYTM·76243J105·US·Common Stock·Healthcare - Biotechnology-13D/G

RYTM (RHYTHM PHARMACEUTICALS INC) is held by 161 institutional investors as of Q2 2026. Largest holders: RA CAPITAL MANAGEMENT, L.P. ($740.2M), BlackRock, Inc. ($683.6M), BAKER BROS. ADVISORS LP ($622.3M). Net institutional sentiment: Mixed.

161

Holders

(9 Elite)

$7B

Total Value

54% (167)

Consensus

90 buying - 77 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)75

Insider (Form 4)34

Activist (13D/13G)74

Congressional (STOCK Act)58

Holder Quality

25

★★★★★

Elite

85

★★★★

Strong

33

★★★

Solid

71

★★

Below

70

★

Weak

Held by 161 funds

9 elite

Who's Trading

Source dates: Price Aug 28, 2026 · Insiders Aug 17, 2026 · Activists May 15, 2026 · Congress none

InsiderLKLee Jennifer KaydenSell $8.9MAug 13, 2026

InsiderGAGarfield AlastairSell $402KAug 13, 2026

InsiderGAGarfield AlastairSell $182KAug 13, 2026

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Top Holders

Top Holders (161)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
RA CAPITAL MANAGEMENT, L.P.	Unchanged	6.7M	$740.2M	6.4%	+187.94%	0
BlackRock, Inc.	Decreased	6.2M(-1.3%)	$683.6M	0.0%	+97.71%	0
BAKER BROS. ADVISORS LP	Unchanged	5.6M	$622.3M	3.1%	+369.22%	0
PRIMECAP MANAGEMENT CO/CA/	Decreased	3.2M(-7.3%)	$351.8M	0.2%	+451.59%	0
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Increased	3.1M(+3.2%)	$348.3M	0.0%	+24.00%	32
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	3M(+1.3%)	$333.8M	0.0%	+24.53%	31
JPMORGAN CHASE & CO	Increased	2.7M(+70.7%)	$292.2M	0.0%	+14.76%	46
STATE STREET CORP	Increased	2.6M(+13.3%)	$285.7M	0.0%	+82.30%	35
WESTFIELD CAPITAL MANAGEMENT CO LP	Increased	2.2M(+14.5%)	$245.2M	0.8%	+44.02%	49
GOLDMAN SACHS GROUP INC	Increased	2.1M(+8.2%)	$236.1M	0.0%	+69.28%	33
FEDERATED HERMES, INC.	Increased	1.8M(+38.8%)	$198.3M	0.3%	+127.51%	48
Polar Capital Holdings Plc	Increased	1.7M(+3.0%)	$184.7M	0.4%	+87.93%	38
GEODE CAPITAL MANAGEMENT, LLC	Increased	1.5M(+8.3%)	$170.3M	0.0%	+204.20%	33
Capital Research Global Investors	Increased	1.5M(+37.4%)	$170.1M	0.0%	+7.50%	40
CITADEL ADVISORS LLC	Decreased	1.3M(-10.9%)	$140.3M	0.0%	+23.14%	0
MORGAN STANLEY	Increased	1.1M(+58.0%)	$123.5M	0.0%	+37.37%	43
FMR LLC	Decreased	1M(-39.3%)	$113.9M	0.0%	+86.58%	0
Pictet Asset Management Holding SA	Increased	957,785(+43.6%)	$106.3M	0.1%	+32.28%	48
Woodline Partners LP	Unchanged	758,891	$84.3M	0.3%	+49.57%	0
ALLIANCEBERNSTEIN L.P.	Decreased	894,723(-1.7%)	$77.8M	0.0%	+16.97%	0

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer