Form 13-F position report

FENNEC PHARMACEUTICALS INC

Reported by CITADEL ADVISORS LLC

FENC CUSIP 31447P100 Manager CIK 0001423053

Reported 199,749 shares, up 92,253 (85.8%) from the prior quarter.

Reported value 52.9%; share count 85.8% vs. the prior quarter.

Added
% of reported 13F value < 0.01% This manager · Q4 2025
Shares 199,749 Quarter-end amount reported
Reported value $1,538,067 Fair value at quarter end
Consecutive quarters held 3 Through Q4 2025

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Reported position value by quarter
Date Holding Value
2021-12-31 65000
2022-03-31 0
2022-09-30 127000
2022-12-31 269319
2023-03-31 293446
2023-06-30 347248
2023-09-30 102962
2023-12-31 0
2024-03-31 541700
2024-06-30 0
2025-06-30 388299
2025-09-30 1006163
2025-12-31 1538067
2026-03-31 944702
2026-06-30 763594

Quarterly position history

How this manager's reported quarter-end position changed over time.

15 quarters
Quarterly reported position history for FENNEC PHARMACEUTICALS INC held by CITADEL ADVISORS LLC.
Quarter Activity Shares Change % of reported 13F Reported value Filed Source filing
Q2 2026 Reduced 71,032 -82,578 (-53.8%) < 0.01% $763,594 2026-08-14
Q1 2026 Reduced 153,610 -46,139 (-23.1%) < 0.01% $944,702 2026-05-15
Q4 2025 Added 199,749 +92,253 (85.8%) < 0.01% $1,538,067 2026-02-17
Q3 2025 Added 107,496 +60,713 (129.8%) < 0.01% $1,006,163 2025-11-14
Q2 2025 New 46,783 +46,783 (0.0%) < 0.01% $388,299 2025-08-14
Q2 2024 Reduced 0 -48,714 (-100.0%) 0 $0 2024-08-14
Q1 2024 New 48,714 +48,714 (0.0%) < 0.01% $541,700 2024-05-15
Q4 2023 Reduced 0 -13,710 (-100.0%) 0 $0 2024-02-14
Q3 2023 Reduced 13,710 -25,616 (-65.1%) < 0.01% $102,962 2023-11-14
Q2 2023 Added 39,326 +4,056 (11.5%) < 0.01% $347,248 2023-08-14
Q1 2023 Added 35,270 +7,216 (25.7%) < 0.01% $293,446 2023-05-15
Q4 2022 Added 28,054 +12,378 (79.0%) < 0.01% $269,319 2023-02-14
Q3 2022 New 15,676 +15,676 (0.0%) < 0.01% $127,000 2022-11-14
Q1 2022 Reduced 0 -14,874 (-100.0%) 0 $0 2022-05-16
Q4 2021 New 14,874 +14,874 (0.0%) < 0.01% $65,000 2022-02-14

Who else reported the position

104 managers reported FENNEC PHARMACEUTICALS INC for Q4 2025.

Managers reporting FENNEC PHARMACEUTICALS INC in Q4 2025.
Manager Activity Shares Change % of reported 13F Reported value Tenure
Southpoint Capital Advisors LP Reduced 2,744,741 -1,332,473 0.49% $21,134,506 34 qtrs
Rosalind Advisors Inc Added 2,613,508 +536,668 7.07% $20,124,012 5 qtrs
Solas Capital Management LLC Added 2,560,726 +372,824 11.19% $19,717,590 27 qtrs
AIGH Capital Management LLC Added 1,581,501 +900,000 2.95% $12,177,558 4 qtrs
BlackRock Inc Added 1,234,277 +22,471 < 0.01% $9,503,934 6 qtrs
VANGUARD GROUP INC Added 1,067,651 +111,887 < 0.01% $8,220,912 11 qtrs
AWM Investment Company Inc New 711,869 +711,869 0.53% $5,481,391 1 qtr
STATE STREET CORPORATION Added 352,775 +11,574 < 0.01% $2,716,368 11 qtrs
GEODE CAPITAL MANAGEMENT LLC Reduced 297,100 -3,672 < 0.01% $2,287,669 23 qtrs
MORGAN STANLEY Added 242,476 +10,074 < 0.01% $1,867,066 33 qtrs
Premium adds each manager's conviction percentile across reporting peers.
Filing details and methodology As reported
Report period
December 31, 2025
Filed
February 17, 2026
Filing type
13F-HR
Position type
COM

Voting authority reported

Sole
199,749
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.