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Equibles

Caption Management, LLC

Position in RARE — Ultragenyx Pharmaceutical Inc.

CIK 1706766 OKLAHOMA CITY, OK
Back to RARE Full portfolio

Position in RARE

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$4,340,700
+$2,036,200 QoQ
Shares Held
130,000
+18.2% QoQ
Ownership
0.132%
of shares outstanding
% of Portfolio
0.17%
of 13F equity value
Holder Rank
#96
of 311 holders
Holding Since
Jun 2020
21 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in RARE Over Time

Shares Held

Position Value (USD)

Derivatives in RARE

reported options exposure · as of Jun 30, 2026
CallValue
$13,753,341
CallShares
411,900
PutValue
$24,000,732
PutShares
718,800

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 Jun 30, 2026

Caption Management, LLC holds $249,760,911 across 78 Biotechnology names. RARE ranks #15 (1.7% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 CGON
CG Oncology, Inc.
 484,461 $34,420,954
2 INSM
INSMED Inc
 236,000 $25,162,320
3 ERAS
Erasca, Inc.
 1,041,225 $19,075,242
4 CELC
Celcuity Inc.
 170,000 $17,785,400
5 DSGN
Design Therapeutics, Inc.
 1,118,098 $16,178,878
6 MLYS
Mineralys Therapeutics, Inc.
 413,087 $11,145,087
7 REPL
Replimune Group, Inc.
 783,873 $8,677,474
8 TARS
Tarsus Pharmaceuticals, Inc.
 120,700 $7,596,858

All Filings in RARE

Export CSV
50 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $24,000,732 718,800
2026-06-30 $4,340,700 130,000
2026-06-30 $13,753,341 411,900
2026-03-31 $6,075,500 290,000
2026-03-31 $7,123,000 340,000
2026-03-31 $2,304,500 110,000
2025-12-31 $5,740,800 249,600
2025-12-31 $9,308,100 404,700
2025-12-31 $5,048,500 219,500
2025-09-30 $16,168,000 537,500
2025-09-30 $4,948,190 164,501
2025-09-30 $4,505,984 149,800
2025-06-30 $35,505,540 976,500
2025-06-30 $8,635,500 237,500
2025-06-30 $17,943,660 493,500
2025-03-31 $1,086,300 30,000
2025-03-31 $6,475,361 178,828
2025-03-31 $10,754,370 297,000
2024-12-31 $4,946,211 117,571
2024-12-31 $1,472,450 35,000
2024-12-31 $8,519,175 202,500
2024-09-30 $477,730 8,600
2024-09-30 $1,666,500 30,000
2024-09-30 $1,666,500 30,000
2024-03-31 $1,101,884 23,600
2024-03-31 $1,101,884 23,600
2023-12-31 $1,434,600 30,000
2023-12-31 $1,434,600 30,000
2023-09-30 $802,125 22,500
2023-09-30 $802,125 22,500
2023-06-30 $4,151,700 90,000
2023-06-30 $4,151,700 90,000
2023-03-31 $722,762 18,024
2023-03-31 $1,203,000 30,000
2023-03-31 $1,203,000 30,000
2022-12-31 $254,815 5,500
2022-12-31 $926,600 20,000
2022-12-31 $926,600 20,000
2022-09-30 $2,145,038 51,800
2022-09-30 $5,089,289 122,900
2022-09-30 $3,412,184 82,400
2022-06-30 $9,718,614 162,900
2022-06-30 $9,700,716 162,600
2022-06-30 $2,028 34
2022-03-31 $4,204,698 57,900
2022-03-31 $2,432,770 33,500
2021-03-31 $1,229,801 10,801
2021-03-31 $2,846,500 25,000
2021-03-31 $5,055,384 44,400
2020-12-31 $3,792,982 27,400