Skip to main content

D. E. Shaw & Co., Inc.

Position in RARE — Ultragenyx Pharmaceutical Inc.

CIK 1009207 New York, NY

Position in RARE

as of Mar 31, 2026 · filed May 15, 2026
Position Value
$26,418,326
+$18,488,777 QoQ
Shares Held
1,261,018
+265.8% QoQ
Ownership
1.28%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2020
23 quarters on record
Voting authority Sole 99.23078021090896.ToString("F0")% Shared 0.ToString("F0")% None 0.7692197890910359.ToString("F0")%

Common Shares in RARE Over Time

Shares Held

Position Value (USD)

Derivatives in RARE

reported options exposure · as of Jun 30, 2021
CallValue
$2,307,470
CallShares
24,200
PutValue
$0
PutShares
0

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

D. E. Shaw & Co., Inc. holds $4,371,472,260 across 180 Biotechnology names. RARE ranks #33 (0.6% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in RARE

Export CSV
26 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $26,418,326 1,261,018
2025-12-31 $7,929,549 344,763
2025-09-30 $7,148,211 237,640
2025-06-30 $19,663,523 540,801
2025-03-31 $20,147,859 556,417
2024-12-31 $12,035,343 286,079
2024-09-30 $14,531,546 261,594
2024-06-30 $8,361,466 203,442
2023-09-30 $219,318 6,152
2023-06-30 $4,379,074 94,929
2023-03-31 $4,847,608 120,888
2022-12-31 $13,435,468 289,995
2022-09-30 $19,560,179 472,354
2022-06-30 $21,448,784 359,517
2022-03-31 $35,172,625 484,338
2021-12-31 $45,962,836 546,591
2021-09-30 $42,904,013 475,707
2021-06-30 $2,307,470 24,200
2021-06-30 $73,047,348 766,097
2021-03-31 $85,527,987 751,168
2021-03-31 $2,755,412 24,200
2020-12-31 $99,017,178 715,287
2020-12-31 $3,350,006 24,200
2020-09-30 $35,415,012 430,892
2020-06-30 $26,372,967 337,164
2020-03-31 $17,704,198 398,474