CAXTON CORP — 13F Holdings & Portfolio
CIK 1388551 · latest 13F-HR filed 2026-08-14
CAXTON CORP manages $1.9M in 13F-reported U.S. long-equity assets across 10 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are SPCX (24.03%), BRK.B (20.35%), GOOGL (13.32%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 4 new positions, exited 1, added to 3, and trimmed 1.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
BUILDING 2, SUITE 500
PRINCETON, NJ 08540
$1.9M
Long-equity book
10
Distinct positions
2026-06-30
Filed 2026-08-14
+4 / −1 / ↑3 / ↓1
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- BERKSHIRE HATHAWAY INC DEL$28.8K +8.3%
- INHIBIKASE THERAPEUTICS INC$10.0K +20.8%
- X4 PHARMACEUTICALS INC$8.4K +13.1%
New Positions
- SPACE EXPLORATION TECHN CORP$445.3K
- ALPHABET INC$246.9K
- VANGUARD INDEX FDS$233.1K
- BLACKSTONE INC$188.2K
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | SPACE EXPLORATION TECHN CORP | SPCX | 84615Q103 | $445.3K | 24.03% | 2,606 | SH |
| 2 | BERKSHIRE HATHAWAY INC DEL | BRK.B | 084670702 | $377.1K | 20.35% | 754 | SH |
| 3 | ALPHABET INC | GOOGL | 02079K305 | $246.9K | 13.32% | 691 | SH |
| 4 | VANGUARD INDEX FDS | VOO | 922908363 | $233.1K | 12.58% | 339 | SH |
| 5 | BLACKSTONE INC | BX | 09260D107 | $188.2K | 10.16% | 1,597 | SH |
| 6 | KYVERNA THERAPEUTICS INC | KYTX | 501976104 | $110.0K | 5.94% | 12,347 | SH |
| 7 | LEXEO THERAPEUTICS INC | LXEO | 52886X107 | $79.0K | 4.26% | 16,962 | SH |
| 8 | X4 PHARMACEUTICALS INC | XFOR | 98420X202 | $72.7K | 3.92% | 15,557 | SH |
| 9 | INHIBIKASE THERAPEUTICS INC | IKT | 45719W205 | $57.8K | 3.12% | 28,453 | SH |
| 10 | ALX ONCOLOGY HLDGS INC | ALXO | 00166B105 | $43.4K | 2.34% | 20,946 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-14 | $1.9M | 10 | 0000919574-26-005174 |
| 2026-03-31 | 2026-05-14 | $4.0M | 7 | 0000919574-26-003017 |
| 2025-12-31 | 2026-02-13 | $4.3M | 11 | 0000919574-26-000956 |
| 2025-09-30 | 2025-11-14 | $22.9M | 12 | 0000919574-25-006891 |