Filed: 8/14/2026ACC: 0001839435-26-000004
📋 What this filing means
OCTAGON CAPITAL ADVISORS LP filed this quarterly 13F‑HR report disclosing 27 equity positions with a total reported market value of $1.11B. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
27
Positions
$1.11B
Total AUM (reported)
58.35M
Total Shares
Allocation by class
COM$707.95M63.6%
COM SHS$204.78M18.4%
SPONSORED ADS$152.49M13.7%
COM NEW$24.33M2.2%
CALL$22.99M2.1%
Portfolio Concentration
Top 3$450.62M40.5%
4–10$423.15M38.0%
11–25$235.80M21.2%
Rest$2.97M0.3%
Top 3 weight
40.5%
Top 10 weight
78.5%
Voting Authority Distribution
Total shares with voting rights: 58.35M
Sole
Full voting authority
58.35M
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)
Sole27
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings27
Rows:
DIANTHUS THERAPEUTICS INC
SOLEShares1.84M
TypeSH
Market value$179.53M
16.14%
Sole
1.84M
Shared
0.00
None
0.00
DEFINIUM THERAPEUTICS INC
SOLEShares2.95M
TypeSH
Market value$138.77M
12.47%
Sole
2.95M
Shared
0.00
None
0.00
ABIVAX SA
SOLEShares993K
TypeSH
Market value$132.33M
11.89%
Sole
993K
Shared
0.00
None
0.00
COGENT BIOSCIENCES INC
SOLEShares2.35M
TypeSH
Market value$90.94M
8.17%
Sole
2.35M
Shared
0.00
None
0.00
ALUMIS INC
SOLEShares2.83M
TypeSH
Market value$79.66M
7.16%
Sole
2.83M
Shared
0.00
None
0.00
ARRIVENT BIOPHARMA INC
SOLEShares1.97M
TypeSH
Market value$68.47M
6.15%
Sole
1.97M
Shared
0.00
None
0.00
TAYSHA GENE THERAPIES INC
SOLEShares9.69M
TypeSH
Market value$66.01M
5.93%
Sole
9.69M
Shared
0.00
None
0.00
BIOAGE LABS INC
SOLEShares1.75M
TypeSH
Market value$42.84M
3.85%
Sole
1.75M
Shared
0.00
None
0.00
MIRUM PHARMACEUTICALS INC
SOLEShares338.90K
TypeSH
Market value$39.68M
3.57%
Sole
338.90K
Shared
0.00
None
0.00
KYMERA THERAPEUTICS INC
SOLEShares310K
TypeSH
Market value$35.55M
3.20%
Sole
310K
Shared
0.00
None
0.00
AKTIS ONCOLOGY INC
SOLEShares960.85K
TypeSH
Market value$30.97M
2.78%
Sole
960.85K
Shared
0.00
None
0.00
XENON PHARMACEUTICALS INC
SOLEShares490K
TypeSH
Market value$29.58M
2.66%
Sole
490K
Shared
0.00
None
0.00
ERASCA INC
SOLEShares1.25M
TypeSH
Market value$22.99M
2.07%
Sole
1.25M
Shared
0.00
None
0.00
PALISADE BIO INC
SOLEShares10.28M
TypeSH
Market value$21.48M
1.93%
Sole
10.28M
Shared
0.00
None
0.00
OCULAR THERAPEUTIX INC
SOLEShares2.08M
TypeSH
Market value$20.38M
1.83%
Sole
2.08M
Shared
0.00
None
0.00
DISC MEDICINE INC
SOLEShares270K
TypeSH
Market value$19.75M
1.78%
Sole
270K
Shared
0.00
None
0.00
SUMMIT THERAPEUTICS INC
SOLEShares1.25M
TypeSH
Market value$18.21M
1.64%
Sole
1.25M
Shared
0.00
None
0.00
PHARVARIS N V
SOLEShares456.72K
TypeSH
Market value$15.79M
1.42%
Sole
456.72K
Shared
0.00
None
0.00
ADLAI NORTYE LTD
SOLEShares934.72K
TypeSH
Market value$10.75M
0.97%
Sole
934.72K
Shared
0.00
None
0.00
PRECISION BIOSCIENCES INC
SOLEShares1.35M
TypeSH
Market value$10.61M
0.95%
Sole
1.35M
Shared
0.00
None
0.00
DBV TECHNOLOGIES S A
SOLEShares574.20K
TypeSH
Market value$9.42M
0.85%
Sole
574.20K
Shared
0.00
None
0.00
FAETH THERAPEUTICS INC
SOLEShares361.01K
TypeSH
Market value$9.03M
0.81%
Sole
361.01K
Shared
0.00
None
0.00
GYRE THERAPEUTICS INC
SOLEShares954.42K
TypeSH
Market value$6.29M
0.57%
Sole
954.42K
Shared
0.00
None
0.00
TREVI THERAPEUTICS INC
SOLEShares315K
TypeSH
Market value$5.87M
0.53%
Sole
315K
Shared
0.00
None
0.00
UNICYCIVE THERAPEUTICS INC
SOLEShares1M
TypeSH
Market value$4.69M
0.42%
Sole
1M
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
DIANTHUS THERAPEUTICS INCSOLE | COM | 1.84M | SH | $179.53M 16.14% | 1.84M | 0.00 | 0.00 |
DEFINIUM THERAPEUTICS INCSOLE | COM SHS | 2.95M | SH | $138.77M 12.47% | 2.95M | 0.00 | 0.00 |
ABIVAX SASOLE | SPONSORED ADS | 993K | SH | $132.33M 11.89% | 993K | 0.00 | 0.00 |
COGENT BIOSCIENCES INCSOLE | COM | 2.35M | SH | $90.94M 8.17% | 2.35M | 0.00 | 0.00 |
ALUMIS INCSOLE | COM | 2.83M | SH | $79.66M 7.16% | 2.83M | 0.00 | 0.00 |
ARRIVENT BIOPHARMA INCSOLE | COM | 1.97M | SH | $68.47M 6.15% | 1.97M | 0.00 | 0.00 |
TAYSHA GENE THERAPIES INCSOLE | COM SHS | 9.69M | SH | $66.01M 5.93% | 9.69M | 0.00 | 0.00 |
BIOAGE LABS INCSOLE | COM | 1.75M | SH | $42.84M 3.85% | 1.75M | 0.00 | 0.00 |
MIRUM PHARMACEUTICALS INCSOLE | COM | 338.90K | SH | $39.68M 3.57% | 338.90K | 0.00 | 0.00 |
KYMERA THERAPEUTICS INCSOLE | COM | 310K | SH | $35.55M 3.20% | 310K | 0.00 | 0.00 |
AKTIS ONCOLOGY INCSOLE | COM | 960.85K | SH | $30.97M 2.78% | 960.85K | 0.00 | 0.00 |
XENON PHARMACEUTICALS INCSOLE | COM | 490K | SH | $29.58M 2.66% | 490K | 0.00 | 0.00 |
ERASCA INCSOLE | CALL | 1.25M | SH | $22.99M 2.07% | 1.25M | 0.00 | 0.00 |
PALISADE BIO INCSOLE | COM | 10.28M | SH | $21.48M 1.93% | 10.28M | 0.00 | 0.00 |
OCULAR THERAPEUTIX INCSOLE | COM | 2.08M | SH | $20.38M 1.83% | 2.08M | 0.00 | 0.00 |
DISC MEDICINE INCSOLE | COM | 270K | SH | $19.75M 1.78% | 270K | 0.00 | 0.00 |
SUMMIT THERAPEUTICS INCSOLE | COM | 1.25M | SH | $18.21M 1.64% | 1.25M | 0.00 | 0.00 |
PHARVARIS N VSOLE | COM | 456.72K | SH | $15.79M 1.42% | 456.72K | 0.00 | 0.00 |
ADLAI NORTYE LTDSOLE | SPONSORED ADS | 934.72K | SH | $10.75M 0.97% | 934.72K | 0.00 | 0.00 |
PRECISION BIOSCIENCES INCSOLE | COM NEW | 1.35M | SH | $10.61M 0.95% | 1.35M | 0.00 | 0.00 |
DBV TECHNOLOGIES S ASOLE | SPONSORED ADS | 574.20K | SH | $9.42M 0.85% | 574.20K | 0.00 | 0.00 |
FAETH THERAPEUTICS INCSOLE | COM NEW | 361.01K | SH | $9.03M 0.81% | 361.01K | 0.00 | 0.00 |
GYRE THERAPEUTICS INCSOLE | COM | 954.42K | SH | $6.29M 0.57% | 954.42K | 0.00 | 0.00 |
TREVI THERAPEUTICS INCSOLE | COM | 315K | SH | $5.87M 0.53% | 315K | 0.00 | 0.00 |
UNICYCIVE THERAPEUTICS INCSOLE | COM NEW | 1M | SH | $4.69M 0.42% | 1M | 0.00 | 0.00 |
Page 1 of 2