Filed: 5/15/2026ACC: 0001839435-26-000003
📋 What this filing means
OCTAGON CAPITAL ADVISORS LP filed this quarterly 13F‑HR report disclosing 29 equity positions with a total reported market value of $903.61M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
29
Positions
$903.61M
Total AUM (reported)
62.70M
Total Shares
Allocation by class
COM$668.80M74.0%
SPONSORED ADS$117.17M13.0%
COM SHS$89.02M9.9%
COM NEW$28.62M3.2%
Portfolio Concentration
Top 3$329.20M36.4%
4–10$290.83M32.2%
11–25$269.77M29.9%
Rest$13.81M1.5%
Top 3 weight
36.4%
Top 10 weight
68.6%
Voting Authority Distribution
Total shares with voting rights: 62.70M
Sole
Full voting authority
62.70M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole29
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings29
Rows:
DIANTHUS THERAPEUTICS INC
SOLEShares1.95M
TypeSH
Market value$163.36M
18.08%
Sole
1.95M
Shared
0.00
None
0.00
COGENT BIOSCIENCES INC
SOLEShares2.35M
TypeSH
Market value$90.45M
10.01%
Sole
2.35M
Shared
0.00
None
0.00
ABIVAX SA
SOLEShares677K
TypeSH
Market value$75.38M
8.34%
Sole
677K
Shared
0.00
None
0.00
ALUMIS INC
SOLEShares2.83M
TypeSH
Market value$62.36M
6.90%
Sole
2.83M
Shared
0.00
None
0.00
DEFINIUM THERAPEUTICS INC
SOLEShares2.44M
TypeSH
Market value$46.12M
5.10%
Sole
2.44M
Shared
0.00
None
0.00
ARRIVENT BIOPHARMA INC
SOLEShares1.97M
TypeSH
Market value$45.47M
5.03%
Sole
1.97M
Shared
0.00
None
0.00
TAYSHA GENE THERAPIES INC
SOLEShares8.86M
TypeSH
Market value$39.60M
4.38%
Sole
8.86M
Shared
0.00
None
0.00
KYMERA THERAPEUTICS INC
SOLEShares425K
TypeSH
Market value$35.40M
3.92%
Sole
425K
Shared
0.00
None
0.00
MIRUM PHARMACEUTICALS INC
SOLEShares338.90K
TypeSH
Market value$31.31M
3.46%
Sole
338.90K
Shared
0.00
None
0.00
BIOAGE LABS INC
SOLEShares1.75M
TypeSH
Market value$30.57M
3.38%
Sole
1.75M
Shared
0.00
None
0.00
CENTESSA PHARMACEUTICALS PLC
SOLEShares750K
TypeSH
Market value$29.79M
3.30%
Sole
750K
Shared
0.00
None
0.00
KALVISTA PHARMACEUTICALS INC
SOLEShares1.45M
TypeSH
Market value$29.19M
3.23%
Sole
1.45M
Shared
0.00
None
0.00
XENON PHARMACEUTICALS INC
SOLEShares490K
TypeSH
Market value$28.49M
3.15%
Sole
490K
Shared
0.00
None
0.00
TERNS PHARMACEUTICALS INC
SOLEShares530K
TypeSH
Market value$27.94M
3.09%
Sole
530K
Shared
0.00
None
0.00
OCULAR THERAPEUTIX INC
SOLEShares3.17M
TypeSH
Market value$26.82M
2.97%
Sole
3.17M
Shared
0.00
None
0.00
PALISADE BIO INC
SOLEShares10.28M
TypeSH
Market value$17.98M
1.99%
Sole
10.28M
Shared
0.00
None
0.00
TREVI THERAPEUTICS INC
SOLEShares1.49M
TypeSH
Market value$17.72M
1.96%
Sole
1.49M
Shared
0.00
None
0.00
DISC MEDICINE INC
SOLEShares270K
TypeSH
Market value$17.26M
1.91%
Sole
270K
Shared
0.00
None
0.00
AKTIS ONCOLOGY INC
SOLEShares960.85K
TypeSH
Market value$17.19M
1.90%
Sole
960.85K
Shared
0.00
None
0.00
CONTEXT THERAPEUTICS INC
SOLEShares5.25M
TypeSH
Market value$13.76M
1.52%
Sole
5.25M
Shared
0.00
None
0.00
PRECISION BIOSCIENCES INC
SOLEShares2.24M
TypeSH
Market value$12.30M
1.36%
Sole
2.24M
Shared
0.00
None
0.00
DBV TECHNOLOGIES S A
SOLEShares574.20K
TypeSH
Market value$12.00M
1.33%
Sole
574.20K
Shared
0.00
None
0.00
UNICYCIVE THERAPEUTICS INC
SOLEShares1M
TypeSH
Market value$6.58M
0.73%
Sole
1M
Shared
0.00
None
0.00
BRIDGEBIO ONCOLOGY THERAPEUT
SOLEShares719K
TypeSH
Market value$6.44M
0.71%
Sole
719K
Shared
0.00
None
0.00
LEXEO THERAPEUTICS INC
SOLEShares1.10M
TypeSH
Market value$6.31M
0.70%
Sole
1.10M
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
DIANTHUS THERAPEUTICS INCSOLE | COM | 1.95M | SH | $163.36M 18.08% | 1.95M | 0.00 | 0.00 |
COGENT BIOSCIENCES INCSOLE | COM | 2.35M | SH | $90.45M 10.01% | 2.35M | 0.00 | 0.00 |
ABIVAX SASOLE | SPONSORED ADS | 677K | SH | $75.38M 8.34% | 677K | 0.00 | 0.00 |
ALUMIS INCSOLE | COM | 2.83M | SH | $62.36M 6.90% | 2.83M | 0.00 | 0.00 |
DEFINIUM THERAPEUTICS INCSOLE | COM SHS | 2.44M | SH | $46.12M 5.10% | 2.44M | 0.00 | 0.00 |
ARRIVENT BIOPHARMA INCSOLE | COM | 1.97M | SH | $45.47M 5.03% | 1.97M | 0.00 | 0.00 |
TAYSHA GENE THERAPIES INCSOLE | COM SHS | 8.86M | SH | $39.60M 4.38% | 8.86M | 0.00 | 0.00 |
KYMERA THERAPEUTICS INCSOLE | COM | 425K | SH | $35.40M 3.92% | 425K | 0.00 | 0.00 |
MIRUM PHARMACEUTICALS INCSOLE | COM | 338.90K | SH | $31.31M 3.46% | 338.90K | 0.00 | 0.00 |
BIOAGE LABS INCSOLE | COM | 1.75M | SH | $30.57M 3.38% | 1.75M | 0.00 | 0.00 |
CENTESSA PHARMACEUTICALS PLCSOLE | SPONSORED ADS | 750K | SH | $29.79M 3.30% | 750K | 0.00 | 0.00 |
KALVISTA PHARMACEUTICALS INCSOLE | COM | 1.45M | SH | $29.19M 3.23% | 1.45M | 0.00 | 0.00 |
XENON PHARMACEUTICALS INCSOLE | COM | 490K | SH | $28.49M 3.15% | 490K | 0.00 | 0.00 |
TERNS PHARMACEUTICALS INCSOLE | COM | 530K | SH | $27.94M 3.09% | 530K | 0.00 | 0.00 |
OCULAR THERAPEUTIX INCSOLE | COM | 3.17M | SH | $26.82M 2.97% | 3.17M | 0.00 | 0.00 |
PALISADE BIO INCSOLE | COM | 10.28M | SH | $17.98M 1.99% | 10.28M | 0.00 | 0.00 |
TREVI THERAPEUTICS INCSOLE | COM | 1.49M | SH | $17.72M 1.96% | 1.49M | 0.00 | 0.00 |
DISC MEDICINE INCSOLE | COM | 270K | SH | $17.26M 1.91% | 270K | 0.00 | 0.00 |
AKTIS ONCOLOGY INCSOLE | COM | 960.85K | SH | $17.19M 1.90% | 960.85K | 0.00 | 0.00 |
CONTEXT THERAPEUTICS INCSOLE | COM | 5.25M | SH | $13.76M 1.52% | 5.25M | 0.00 | 0.00 |
PRECISION BIOSCIENCES INCSOLE | COM NEW | 2.24M | SH | $12.30M 1.36% | 2.24M | 0.00 | 0.00 |
DBV TECHNOLOGIES S ASOLE | SPONSORED ADS | 574.20K | SH | $12.00M 1.33% | 574.20K | 0.00 | 0.00 |
UNICYCIVE THERAPEUTICS INCSOLE | COM NEW | 1M | SH | $6.58M 0.73% | 1M | 0.00 | 0.00 |
BRIDGEBIO ONCOLOGY THERAPEUTSOLE | COM NEW | 719K | SH | $6.44M 0.71% | 719K | 0.00 | 0.00 |
LEXEO THERAPEUTICS INCSOLE | COM | 1.10M | SH | $6.31M 0.70% | 1.10M | 0.00 | 0.00 |
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