Who owns Fennec Pharmaceuticals Inc. (FENC)
Which tracked institutional funds hold FENC, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See FENC company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on FENC is one-sided between 2025-Q4 and 2026-Q1: 4 added or opened and 12 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
FENC’s largest tracked holder by dollar value, Rosalind Advisors, Inc., sizes it at 7.3% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 7.3pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in FENC divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 90 tracked filers holding FENC, 54 increased or opened the position and 40 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in FENC between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 3
- VANGUARD CAPITAL MANAGEMENT LLC$6M
- VANGUARD PORTFOLIO MANAGEMENT LLC$1M
- Cornerstone Capital, Inc.$646K
Full exits 3
- VANGUARD GROUP INC$8M
- Apis Capital Advisors, LLC$2M
- MARSHALL WACE, LLP$983K
Largest adds
- Potomac Capital Management, Inc.$648K
Largest trims
- Solas Capital Management, LLC$4M
- Southpoint Capital Advisors LP$4M
- Rosalind Advisors, Inc.$2M
- BlackRock, Inc.$1M
- AWM Investment Company, Inc.$1M
- CITADEL ADVISORS LLC$593K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Rosalind Advisors, Inc. added | 2,908,201 | $18M | 14.9% | 2026-Q1 |
| Southpoint Capital Advisors LP | 2,744,741 | $17M | 14.1% | 2026-Q1 |
| Solas Capital Management, LLC trimmed | 2,482,198 | $15M | 12.7% | 2026-Q1 |
| AIGH Capital Management LLC added | 1,981,501 | $12M | 10.2% | 2026-Q1 |
| BlackRock, Inc. added | 1,368,176 | $8M | 7.0% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 897,144 | $6M | 4.6% | 2026-Q1 |
| AWM Investment Company, Inc. added | 720,135 | $4M | 3.7% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 371,738 | $2M | 1.9% | 2026-Q1 |
| STATE STREET CORP added | 359,055 | $2M | 1.8% | 2026-Q1 |
| Potomac Capital Management, Inc. added | 224,400 | $1M | 1.2% | 2026-Q1 |
| MORGAN STANLEY trimmed | 211,108 | $1M | 1.1% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 168,473 | $1M | 0.9% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 153,610 | $945K | 0.8% | 2026-Q1 |
| NORTHERN TRUST CORP added | 152,123 | $936K | 0.8% | 2026-Q1 |
| Lion Point Capital, LP | 112,434 | $691K | 0.6% | 2026-Q1 |
| Cornerstone Capital, Inc. new | 105,000 | $646K | 0.5% | 2026-Q1 |
| GENDELL JEFFREY L trimmed | 83,024 | $511K | 0.4% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 83,005 | $510K | 0.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 63,537 | $391K | 0.3% | 2026-Q1 |
| Nuveen, LLC added | 60,948 | $375K | 0.3% | 2026-Q1 |
| THOMPSON SIEGEL & WALMSLEY LLC new | 57,226 | $352K | 0.3% | 2026-Q1 |
| Squarepoint Ops LLC added | 56,510 | $348K | 0.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 55,664 | $342K | 0.3% | 2026-Q1 |
| Eleva Capital SAS new | 53,234 | $327K | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp added | 52,462 | $323K | 0.3% | 2026-Q1 |
| Trexquant Investment LP added | 51,869 | $319K | 0.3% | 2026-Q1 |
| 1492 Capital Management LLC added | 50,705 | $312K | 0.3% | 2026-Q1 |
| Hartford Financial Management Inc. | 50,646 | $311K | 0.3% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 43,500 | $268K | 0.2% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 38,724 | $238K | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 31,298 | $192K | 0.2% | 2026-Q1 |
| PRELUDE CAPITAL MANAGEMENT, LLC added | 29,599 | $182K | 0.2% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 29,378 | $181K | 0.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 26,405 | $162K | 0.1% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 24,146 | $148K | 0.1% | 2026-Q1 |
| JONES FINANCIAL COMPANIES LLLP | 24,952 | $147K | 0.1% | 2026-Q1 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P new | 21,500 | $132K | 0.1% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 21,202 | $130K | 0.1% | 2026-Q1 |
| GLOBEFLEX CAPITAL L P new | 18,343 | $113K | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 16,865 | $104K | 0.1% | 2026-Q1 |
| Engineers Gate Manager LP new | 15,516 | $95K | 0.1% | 2026-Q1 |
| XTX Topco Ltd trimmed | 15,255 | $94K | 0.1% | 2026-Q1 |
| HighTower Advisors, LLC trimmed | 14,960 | $92K | 0.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 13,621 | $84K | 0.1% | 2026-Q1 |
| MetLife Investment Management, LLC added | 13,509 | $83K | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 10,310 | $79K | 0.1% | 2026-Q1 |
| Invesco Ltd. trimmed | 11,677 | $72K | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 11,859 | $68K | 0.1% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 10,897 | $67K | 0.1% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 9,753 | $60K | 0.1% | 2026-Q1 |
| Legal & General Group Plc added | 8,639 | $52K | 0.0% | 2026-Q1 |
| EverSource Wealth Advisors, LLC added | 796 | $41K | 0.0% | 2026-Q1 |
| State of Alaska, Department of Revenue added | 6,570 | $40K | 0.0% | 2026-Q1 |
| UBS Group AG added | 6,472 | $40K | 0.0% | 2026-Q1 |
| BARCLAYS PLC trimmed | 6,273 | $39K | 0.0% | 2026-Q1 |
| Police & Firemen's Retirement System of New Jersey | 6,250 | $38K | 0.0% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 6,197 | $38K | 0.0% | 2026-Q1 |
| STRS OHIO | 5,200 | $32K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) added | 4,339 | $27K | 0.0% | 2026-Q1 |
| FMR LLC added | 4,254 | $26K | 0.0% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 2,862 | $18K | 0.0% | 2026-Q1 |
| FEDERATED HERMES, INC. trimmed | 2,401 | $15K | 0.0% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 1,603 | $10K | 0.0% | 2026-Q1 |
| Ameritas Investment Partners, Inc. | 1,499 | $9K | 0.0% | 2026-Q1 |
| CITIGROUP INC added | 1,393 | $8K | 0.0% | 2026-Q1 |
| CWM, LLC added | 1,063 | $7K | 0.0% | 2026-Q1 |
| Sterling Capital Management LLC trimmed | 744 | $5K | 0.0% | 2026-Q1 |
| PNC FINANCIAL SERVICES GROUP, INC. trimmed | 510 | $3K | 0.0% | 2026-Q1 |
| Pinnacle Wealth Planning Services, Inc. | 507 | $3K | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC added | 1,067,651 | $8M | 6.9% | 2025-Q4 stale |
| TANG CAPITAL MANAGEMENT LLC added | 334,593 | $3M | 2.6% | 2025-Q3 stale |
| HARBERT FUND ADVISORS, INC. trimmed | 177,815 | $2M | 1.4% | 2025-Q3 stale |
| Apis Capital Advisors, LLC added | 204,000 | $2M | 1.3% | 2025-Q4 stale |
| MARSHALL WACE, LLP added | 127,693 | $983K | 0.8% | 2025-Q4 stale |
| Informed Momentum Co LLC added | 78,661 | $653K | 0.5% | 2025-Q2 stale |
| DG Capital Management, LLC trimmed | 84,213 | $513K | 0.4% | 2025-Q1 stale |
| Stonepine Capital Management, LLC new | 50,000 | $385K | 0.3% | 2025-Q4 stale |
| Hillsdale Investment Management Inc. added | 44,000 | $339K | 0.3% | 2025-Q4 stale |
| Manatuck Hill Partners, LLC new | 30,200 | $251K | 0.2% | 2025-Q2 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 32,460 | $250K | 0.2% | 2025-Q4 stale |
| ACADIAN ASSET MANAGEMENT LLC added | 27,059 | $207K | 0.2% | 2025-Q4 stale |
| SIMPLEX TRADING, LLC trimmed | 21,270 | $199K | 0.2% | 2025-Q3 stale |
| MILLENNIUM MANAGEMENT LLC added | 24,402 | $188K | 0.2% | 2025-Q4 stale |
| JANE STREET GROUP, LLC trimmed | 24,044 | $185K | 0.2% | 2025-Q4 stale |
| Point72 Asset Management, L.P. added | 21,298 | $164K | 0.1% | 2025-Q4 stale |
| WEXFORD CAPITAL LP | 26,414 | $161K | 0.1% | 2025-Q1 stale |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 17,023 | $159K | 0.1% | 2025-Q3 stale |
| FRANKLIN RESOURCES INC added | 16,978 | $159K | 0.1% | 2025-Q3 stale |
| RENAISSANCE TECHNOLOGIES LLC added | 20,000 | $154K | 0.1% | 2025-Q4 stale |
| SHERBROOKE PARK ADVISERS LLC trimmed | 13,742 | $114K | 0.1% | 2025-Q2 stale |
| Quadrature Capital Ltd trimmed | 14,761 | $114K | 0.1% | 2025-Q4 stale |
| HRT FINANCIAL LP trimmed | 12,395 | $102K | 0.1% | 2025-Q2 stale |
| LAZARD ASSET MANAGEMENT LLC added | 13,121 | $101K | 0.1% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP trimmed | 13,000 | $100K | 0.1% | 2025-Q4 stale |
| INTECH INVESTMENT MANAGEMENT LLC trimmed | 10,452 | $80K | 0.1% | 2025-Q4 stale |
| Corebridge Financial, Inc. added | 11,664 | $71K | 0.1% | 2025-Q1 stale |
| ROYAL BANK OF CANADA added | 2,467 | $19K | 0.0% | 2025-Q4 stale |
| CIBC Private Wealth Group LLC | 1,565 | $12K | 0.0% | 2025-Q4 stale |
| AMALGAMATED BANK trimmed | 736 | $6K | 0.0% | 2025-Q4 stale |
| COLDSTREAM CAPITAL MANAGEMENT INC new | 625 | $4K | 0.0% | 2025-Q1 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.