RYTM
RHYTHM PHARM (RYTM)
NASDAQ
$89.20-$0.07 (-0.08%)
Price as of Oct 23, 2026 7:30 PM EDT
  • $6.1B
    Market Cap
  • -19.19%
    1-Year Change
  • Biotechnology
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
BLACKROCK FUNDING, INC. /DE
10.10%
7.0M
+61,457 (+0.88%)
Dec 31, 2024
BLACKROCK INC.
9.79%
6.7M
+212,277 (+3.15%)
Jun 30, 2024
RA CAPITAL MANAGEMENT, L.P.
9.68%
6.7M
0 (0.00%)
Jun 30, 2026
VANGUARD GROUP INC
9.02%
6.2M
+1.2M (+19.55%)
Dec 31, 2025
BLACKROCK, INC.
8.94%
6.2M
-80,249 (-1.30%)
Jun 30, 2026
BAKER BROS. ADVISORS LP
8.14%
5.6M
0 (0.00%)
Jun 30, 2026
PRIMECAP MANAGEMENT CO/CA/
4.60%
3.2M
-248,656 (-7.85%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions1.7B (82.40%)
  • Mutual Funds321.8M (15.99%)
  • Insiders32.4M (1.61%)
  • Other0 (0.00%)

Insider Transactions

  • 1.61% (32.4M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 7
    Number of InsiderSelling (last 12 months)
  • $193.6M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Joshi Manher
Chief Medical Officer
Award
Aug 17, 2026
$0.00
50,000
$0.00
50,000
Joshi Manher
Chief Medical Officer
Award
Aug 17, 2026
$0.00
25,000
$0.00
25,000
Shulman Joseph
Chief Technical Officer
Exempt
Aug 13, 2026
$0.00
2,024
$0.00
5,945
Chien Jennifer
EVP, Head of North America
Exempt
Aug 13, 2026
$0.00
35,000
$0.00
36,283
Shulman Joseph
Chief Technical Officer
Exempt
Aug 13, 2026
$13,763.20
2,024
$6.80
20,994
Chien Jennifer
EVP, Head of North America
Exempt
Aug 13, 2026
$0.00
21,601
$0.00
0
Shulman Joseph
Chief Technical Officer
Sell
Aug 13, 2026
$608,210.25
5,079
$119.75
15,915
Chien Jennifer
EVP, Head of North America
Exempt
Aug 13, 2026
$850,150.00
35,000
$24.29
54,233
Chien Jennifer
EVP, Head of North America
Exempt
Aug 13, 2026
$146,886.80
21,601
$6.80
75,834
Chien Jennifer
EVP, Head of North America
Sell
Aug 13, 2026
$8.9M
75,834
$117.38
0
Mazabraud Yann
EVP, Head of International
Exempt
Aug 12, 2026
$0.00
46,625
$0.00
35,875
Mazabraud Yann
EVP, Head of International
Exempt
Aug 12, 2026
$317,050.00
46,625
$6.80
112,655
Mazabraud Yann
EVP, Head of International
Sell
Aug 12, 2026
$257,138.16
2,300
$111.80
110,355
Mazabraud Yann
EVP, Head of International
Sell
Aug 12, 2026
$112,856.00
1,000
$112.86
109,355
Mazabraud Yann
EVP, Head of International
Sell
Aug 12, 2026
$413,477.28
3,605
$114.70
105,750
Mazabraud Yann
EVP, Head of International
Sell
Aug 12, 2026
$1.7M
14,568
$115.43
91,182
Mazabraud Yann
EVP, Head of International
Sell
Aug 12, 2026
$2.1M
18,208
$116.49
72,974
Mazabraud Yann
EVP, Head of International
Sell
Aug 12, 2026
$2.0M
17,319
$117.47
55,655
Garfield Alastair
Chief Scientific Officer
Exempt
Jul 01, 2026
$0.00
4,445
$0.00
8,888
Garfield Alastair
Chief Scientific Officer
Exempt
Jul 01, 2026
$0.00
4,445
$0.00
12,208
Garfield Alastair
Chief Scientific Officer
In Kind
Jul 01, 2026
$237,381.50
2,150
$110.41
10,058
GOOD JENNIFER L
Award
Jun 24, 2026
$0.00
3,691
$0.00
3,691
JEAN CHRISTOPHE
Award
Jun 24, 2026
$0.00
3,691
$0.00
3,691
MCGIRR DAVID W J
Award
Jun 24, 2026
$0.00
3,691
$0.00
3,691
JEAN CHRISTOPHE
Award
Jun 24, 2026
$0.00
2,324
$0.00
2,324
GOOD JENNIFER L
Award
Jun 24, 2026
$0.00
2,324
$0.00
2,324
MCGIRR DAVID W J
Award
Jun 24, 2026
$0.00
2,324
$0.00
2,324
JEAN CHRISTOPHE
Exempt
Jun 23, 2026
$0.00
4,712
$0.00
11,712
GOOD JENNIFER L
Exempt
Jun 23, 2026
$0.00
4,712
$0.00
11,712
JEAN CHRISTOPHE
Exempt
Jun 23, 2026
$0.00
4,712
$0.00
0