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Equibles

CITADEL ADVISORS LLC

Position in ATYR — aTYR PHARMA INC

CIK 1423053 MIAMI, FL
Back to ATYR Full portfolio

Position in ATYR

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$36,950
+$36,950 QoQ
Shares Held
47,372
Ownership
0.048%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#34
of 109 holders
Holding Since
Mar 2020
23 quarters on record
Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in ATYR Over Time

Shares Held

Position Value (USD)

Derivatives in ATYR

reported options exposure · as of Mar 31, 2026
CallValue
$84,396
CallShares
108,200
PutValue
$37,284
PutShares
47,800

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 $5,780,537,601 across 374 Biotechnology names. ATYR ranks #348 (0.0% 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 ATYR

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $84,396 108,200
2026-03-31 $37,284 47,800
2026-03-31 $36,950 47,372
2025-12-31 $99,597 127,200
2025-12-31 $198,725 253,800
2025-09-30 $460,863 639,200
2025-09-30 $144,055 199,800
2025-06-30 $775,203 152,900
2025-06-30 $603,923 119,117
2025-06-30 $965,328 190,400
2025-03-31 $68,252 22,600
2025-03-31 $337,636 111,800
2025-03-31 $788,241 261,007
2024-12-31 $44,746 12,361
2024-12-31 $100,636 27,800
2024-12-31 $58,282 16,100
2024-09-30 $27,280 15,500
2024-09-30 $1,701,227 966,607
2024-09-30 $5,456 3,100
2024-06-30 $7,176 4,600
2024-06-30 $2,878,608 1,845,262
2024-06-30 $312 200
2024-03-31 $14,625 7,500
2024-03-31 $3,711,524 1,903,346
2024-03-31 $6,240 3,200
2023-12-31 $987 700
2023-12-31 $2,472,575 1,753,600
2023-12-31 $705 500
2023-09-30 $2,818,933 1,784,136
2023-09-30 $12,324 7,800
2023-09-30 $5,530 3,500
2023-06-30 $29,160 13,500
2023-06-30 $691,394 320,090
2023-06-30 $20,952 9,700
2023-03-31 $13,860 6,600
2023-03-31 $85,950 40,929
2023-03-31 $6,720 3,200
2022-12-31 $4,380 2,000
2022-12-31 $82,862 37,837
2022-12-31 $6,351 2,900
2022-09-30 $56,400 18,800
2022-06-30 $76,693 27,100
2022-06-30 $38,205 13,500
2022-03-31 $855,576 159,921
2022-03-31 $146,055 27,300
2022-03-31 $215,605 40,300
2021-12-31 $259,956 34,800
2021-12-31 $1,445,399 193,494
2021-12-31 $107,568 14,400
2021-09-30 $185,232 20,400

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