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Rhythm Pharmaceuticals
RYTM

124 hedge funds and large institutions have $1.01B invested in Rhythm Pharmaceuticals in 2021 Q1 according to their latest regulatory filings, with 25 funds opening new positions, 59 increasing their positions, 25 reducing their positions, and 19 closing their positions.

New
Increased
Maintained
Reduced
Closed

136% more repeat investments, than reductions

Existing positions increased: 59 | Existing positions reduced: 25

32% more first-time investments, than exits

New positions opened: 25 | Existing positions closed: 19

4% more funds holding

Funds holding: 119 → 124 (+5)

3.17% more ownership

Funds ownership: 91.65% → 94.81% (+3.2%)

0% more funds holding in top 10

Funds holding in top 10: 2 → 2 (0)

15% less capital invested

Capital invested by funds: $1.19B → $1.01B (-$183M)

25% less call options, than puts

Call options by funds: $1.05M | Put options by funds: $1.39M

Holders
124
Holders Change
+5
Holders Change %
+4.2%
% of All Funds
2.18%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.04%
New
25
Increased
59
Reduced
25
Closed
19
Calls
$1.05M
Puts
$1.39M
Net Calls
-$341K
Net Calls Change
+$2.15M

Top Buyers

Rank Fund Capital Flow
1
Primecap Management
Primecap Management
California
+$48.2M
2
BBA
Baker Bros. Advisors
New York
+$33.8M
3
State Street
State Street
Massachusetts
+$33.7M
4
GGHC
Gilder Gagnon Howe & Co
New York
+$33M
5
RCM
RA Capital Management
Massachusetts
+$20.1M

Top Sellers

Rank Fund Capital Flow
1
Wellington Management Group
Wellington Management Group
Massachusetts
-$31.5M
2
MAM
MPM Asset Management
Massachusetts
-$29M
3
DM
Deerfield Management
New York
-$21.2M
4
Janus Henderson Group
Janus Henderson Group
United Kingdom
-$11.7M
5
OM
Opaleye Management
Massachusetts
-$3.42M
Name Holding Trade Value Shares
Change 		Change in
Stake
MWNA
26
Marshall Wace North America
New York
$3.6M +$4.91M +169,156 New
N
27
Nuveen
North Carolina
$3.26M +$527K +18,163 +13%
Citigroup
28
Citigroup
New York
$3.24M +$4.16M +143,603 +1,627%
Bank of New York Mellon
29
Bank of New York Mellon
New York
$2.9M +$166K +5,732 +4%
UBS Group
30
UBS Group
Switzerland
$2.7M +$745K +25,699 +25%
Susquehanna International Group
31
Susquehanna International Group
Pennsylvania
$2.63M +$2.09M +72,222 +140%
Rafferty Asset Management
32
Rafferty Asset Management
New York
$2.59M +$3.25M +111,888 +1,144%
Citadel Advisors
33
Citadel Advisors
Florida
$2.52M +$1.18M +40,662 +52%
Stifel Financial
34
Stifel Financial
Missouri
$2.49M +$3.06M +105,579 +906%
Bank of America
35
Bank of America
North Carolina
$2.26M +$472K +16,283 +18%
Morgan Stanley
36
Morgan Stanley
New York
$2.15M +$1.47M +50,643 +101%
SG Americas Securities
37
SG Americas Securities
New York
$1.85M -$693K -23,904 -22%
Fidelity Investments
38
Fidelity Investments
Massachusetts
$1.77M +$1.05M +36,100 +77%
JP Morgan Chase
39
JP Morgan Chase
New York
$1.7M -$245K -8,435 -10%
Swiss National Bank
40
Swiss National Bank
Switzerland
$1.67M +$687K +23,700 +43%
Barclays
41
Barclays
United Kingdom
$1.58M +$1.15M +39,527 +114%
Alyeska Investment Group
42
Alyeska Investment Group
Illinois
$1.57M +$2.14M +73,957 New
Squarepoint
43
Squarepoint
New York
$1.52M +$615K +21,203 +42%
California Public Employees Retirement System
44
California Public Employees Retirement System
California
$1.46M -$183K -6,321 -8%
Tudor Investment Corp
45
Tudor Investment Corp
Connecticut
$1.42M +$1.94M +66,852 New
Norges Bank
46
Norges Bank
Norway
$1.39M -$2.74M -94,320 -59%
RHJA
47
Rice Hall James & Associates
California
$1.37M +$451K +15,538 +32%
California State Teachers Retirement System (CalSTRS)
48
California State Teachers Retirement System (CalSTRS)
California
$1.22M +$197K +6,800 +13%
Renaissance Technologies
49
Renaissance Technologies
New York
$1.04M +$1.13M +39,000 +390%
State of Wisconsin Investment Board
50
State of Wisconsin Investment Board
Wisconsin
$1.03M – – –
1
2
3 4 5

RYTM Hedge Fund Activity: Q1 2021 in Review

124 of the 5,695 institutional investors tracked by Wall St. Rank reported a position in Rhythm Pharmaceuticals (RYTM) for Q1 2021, worth a combined $1.01B — down 15% from $1.19B a quarter earlier.

Buyers outnumbered sellers: 25 funds opened new RYTM positions and 19 closed out — a net gain of 6 holders — while 59 added to existing stakes and 25 trimmed.

The largest buyer was Primecap Management, adding an estimated $48.2M. The largest seller was Wellington Management Group, cutting an estimated $31.5M.

  • 124 institutional investors held Rhythm Pharmaceuticals (RYTM) as of Q1 2021, up from 119 in Q4 2020.
  • Funds reported $1.01B of Rhythm Pharmaceuticals stock for Q1 2021, down 15% quarter-over-quarter.
  • 25 funds opened new Rhythm Pharmaceuticals positions in Q1 2021 and 19 closed out, a net change of +6 holders.
  • The largest Rhythm Pharmaceuticals buyer in Q1 2021 was Primecap Management, an estimated $48.2M added.
  • The largest Rhythm Pharmaceuticals seller in Q1 2021 was Wellington Management Group, an estimated $31.5M sold.

Based on aggregated 13F filings for Q1 2021.