Foursixthree Capital LP
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), Foursixthree Capital LP reported 10 stock positions worth $252.5 million. Its top holding was Telephone and Data Systems (TDS) at 21.5% of the portfolio, followed by Echostar Class A (ECHO, 18.1%) and Vistance Networks (VISN, 17.1%). Compared with Q2 2025, it opened 1 new position, sold out of 1, added to 4 and reduced 4. The biggest buy was a new position in Echostar Class A (ECHO) and the biggest sale Telephone and Data Systems (TDS, shares −15%).
- Most Recent 13F
- Q2 2026
- Location
- NEW YORK, NY
- CIK
- 0001897652
- Portfolio Value
- $252.5M (Q3 2025)
- SEC Filing
- 0000905148-25-004042 ↗ filed Nov 14, 2025
Holdings Value
Holdings 10 stocks · $252.5M
| TDS Telephone and Data Systems | 21.50% | 1,383,499 | $54.3M | Reduce -14.8% |
| ECHO Echostar Corp. Class A | 18.09% | 598,112 | $45.7M | New |
| VISN Vistance Networks Inc. filed as COMMSCOPE HLDG CO INC | 17.12% | 2,792,862 | $43.2M | Reduce -32.0% |
| LITE Lumentum Holdings Inc. | 13.23% | 205,368 | $33.4M | Add +763.6% |
| CIEN Ciena Corp. | 11.45% | 198,499 | $28.9M | Reduce -30.9% |
| ROIV Roivant Sciences Ltd. | 5.62% | 938,175 | $14.2M | Add +4.2% |
| OPTU Optimum Communications Inc. Class A filed as ALTICE USA INC | 3.87% | 4,055,638 | $9.8M | Add +13.4% |
| ABUS Arbutus Biopharma Corp. | 3.56% | 1,978,975 | $9.0M | Reduce -22.6% |
| STHO Star Holdings filed as STAR HLDGS | 2.88% | 883,897 | $7.3M | No change |
| IHRT Iheartmedia Inc. Class A | 2.68% | 2,357,590 | $6.8M | Add +24.6% |
Options reported separately and not counted above: VISN calls ($56.4M), TDS puts ($22.4M).
Other holdings (5): bonds, preferreds, convertibles and warrants · $32.3M (not counted above)
| Security | Class | Shares / Principal | Value | Change |
|---|---|---|---|---|
| CAPITAL SOUTHWEST CORP (CSWC 5.125 11/15/29) | NOTE 5.125%11/1 · principal | 21,500,000 | $21.4M | No change |
| LUMENTUM HOLDINGS INC (LITE 1.5 12/15/29) | NOTE 1.500%12/1 · principal | 4,500,000 | $10.9M | Reduce -83.3% |
| MDAIW Spectral AI -CW27 | *W EXP 09/11/202 | 11,666 | $8K | No change |
| BAERW Wildfire New Pubco Inc.-27 | *W EXP 01/24/202 | 10,000 | $770 | No change |
| SDAWW Suncar Technology Group -28 | *W EXP 05/17/202 | 10,000 | $578 | No change |
Total filed on the 13F, all lines: $284.8M.
Portfolio Sells Q2 2025 → Q3 2025
Portfolio Buys Q2 2025 → Q3 2025
Options Activity Q2 2025 → Q3 2025
| VISN Vistance Networks Inc. | call | Add +224.7% | 3,642,800 | $56.4M |
| TDS Telephone and Data Systems | put | Reduce -62.6% | 571,200 | $22.4M |
| ABR Arbor Realty Trust Inc. | call | Sold out | 412,500 | $4.4Mbefore exit |
| KSS Kohls Corp. | put | Sold out | 100,000 | $848Kbefore exit |
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
Notes & Other Activity Q2 2025 → Q3 2025
| LUMENTUM HOLDINGS INC (LITE 1.5 12/15/29) | NOTE 1.500%12/1 · principal | Reduce -83.3% | 4,500,000 | $10.9M |
Bonds, preferreds, convertibles and warrants; not part of the stock holdings or percentages above.
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 13 | $370.4M | DPC, PPLI, TDS, ECHO, VSAT |
| Q1 2026 | 11 | $203.4M | VISN, TDS, HOLX, TDAY, ECHO |
| Q4 2025 | 10 | $193.3M | ECHO, TDS, VISN, TDAY, IHRT |
| Q3 2025 | 10 | $252.5M | TDS, ECHO, VISN, LITE, CIEN |
| Q2 2025 | 10 | $155.3M | TDS, VISN, CIEN, ROIV, ABUS |
| Q1 2025 | 11 | $159.4M | TDS, VISN, TLN, LITE, ROIV |
| Q4 2024 | 9 | $114.7M | TDS, VISN, EQT, STHO, INDV |