Skip to main content
Equibles

CITADEL ADVISORS LLC

Position in RYTM — Rhythm Pharmaceuticals, Inc.

CIK 1423053 MIAMI, FL
Back to RYTM Full portfolio

Position in RYTM

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$123,377,293
+$106,965,707 QoQ
Shares Held
1,418,619
+825.3% QoQ
Ownership
2.07%
of shares outstanding
% of Portfolio
0.10%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
24 quarters on record
Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in RYTM Over Time

Shares Held

Position Value (USD)

Derivatives in RYTM

reported options exposure · as of Mar 31, 2026
CallValue
$2,652,585
CallShares
30,500
PutValue
$339,183
PutShares
3,900

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Biotechnology

Healthcare · as of Mar 31, 2026

CITADEL ADVISORS LLC holds $5,780,363,972 across 373 Biotechnology names. RYTM ranks #14 (2.1% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 INSM
INSMED Inc
 2,182,571 $356,894,009
2 ONC
BeOne Medicines Ltd.
 1,032,298 $306,561,536
3 BMRN
Biomarin Pharmaceutical Inc
 4,512,634 $254,918,694
4 JAZZ
Jazz Pharmaceuticals plc
 1,259,444 $238,097,887
5 MDGL
Madrigal Pharmaceuticals, Inc.
 453,843 $237,573,195
6 BBIO
BridgeBio Pharma, Inc.
 3,173,940 $235,696,783
7 TERN
Terns Pharmaceuticals, Inc.
 3,218,810 $169,695,662
8 PTGX
Protagonist Therapeutics, Inc
 1,551,900 $163,570,260

All Filings in RYTM

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $2,652,585 30,500
2026-03-31 $339,183 3,900
2026-03-31 $123,377,293 1,418,619
2025-12-31 $16,411,586 153,322
2025-12-31 $4,056,816 37,900
2025-09-30 $5,170,688 51,200
2025-09-30 $302,970 3,000
2025-09-30 $13,393,899 132,626
2025-06-30 $1,099,506 17,400
2025-06-30 $1,788,277 28,300
2025-03-31 $1,896,326 35,800
2025-03-31 $3,711,501 70,068
2025-03-31 $132,425 2,500
2024-12-31 $593,388 10,600
2024-12-31 $7,294,194 130,300
2024-12-31 $2,262,655 40,419
2024-09-30 $5,384,539 102,778
2024-09-30 $2,462,330 47,000
2024-09-30 $654,875 12,500
2024-06-30 $743,186 18,100
2024-06-30 $1,786,110 43,500
2024-03-31 $2,877,112 66,400
2024-03-31 $935,928 21,600
2024-03-31 $177,566 4,098
2023-12-31 $5,236,671 113,915
2023-12-31 $3,397,183 73,900
2023-12-31 $615,998 13,400
2023-09-30 $139,842 6,100
2023-09-30 $419,527 18,300
2023-09-30 $5,855,801 255,433
2023-06-30 $150,059 9,100
2023-06-30 $3,125,382 189,532
2023-06-30 $258,893 15,700
2023-03-31 $371,072 20,800
2023-03-31 $6,512,313 365,040
2023-03-31 $572,664 32,100
2022-12-31 $2,058,725 70,698
2022-12-31 $1,316,224 45,200
2022-12-31 $113,568 3,900
2022-09-30 $1,367,957 55,835
2022-09-30 $5,066,600 206,800
2022-06-30 $697,440 168,058
2022-06-30 $899,305 216,700
2022-03-31 $2,249,856 195,300
2022-03-31 $2,879,123 249,924
2021-12-31 $111,776 11,200
2021-09-30 $165,862 12,700
2021-06-30 $236,918 12,100
2021-06-30 $637,798 32,574
2021-03-31 $302,034 14,200

Report a Problem

Category
Description
Email (optional, for follow-up)