Foursixthree Capital LP

In its 13F for Q1 2025 (holdings as of March 31, 2025, filed May 15, 2025), Foursixthree Capital LP reported 11 stock positions worth $159.4 million. Its top holding was Telephone and Data Systems (TDS) at 34.9% of the portfolio, followed by Vistance Networks (VISN, 23.8%) and Talen Energy (TLN, 11.0%). Compared with Q4 2024, it opened 6 new positions, sold out of 4, added to 4 and reduced 1. The biggest buy was a new position in Talen Energy (TLN) and the biggest sale an exit from Eqt (EQT).

Most Recent 13F
Q2 2026
Location
NEW YORK, NY
CIK
0001897652
Portfolio Value
$159.4M (Q1 2025)
SEC Filing
0000905148-25-001738 ↗ filed May 15, 2025

Holdings Value

0$100.0M$200.0M$300.0M$400.0M Q4 2024: $114.7M Q4 2024 Q1 2025: $159.4M $159.4M Q1 2025 Q2 2025: $155.3M Q2 2025 Q3 2025: $252.5M Q3 2025 Q4 2025: $193.3M Q4 2025 Q1 2026: $203.4M Q1 2026 Q2 2026: $370.4M Q2 2026

Holdings 11 stocks · $159.4M
TDS Telephone and Data Systems 34.90% 1,435,911 $55.6M Add +6.3%
VISN Vistance Networks Inc. filed as COMMSCOPE HLDG CO INC 23.81% 7,148,447 $38.0M Add +20.2%
TLN Talen Energy Corp. 10.97% 87,564 $17.5M New
LITE Lumentum Holdings Inc. 6.74% 172,368 $10.7M New
ROIV Roivant Sciences Ltd. 5.38% 850,000 $8.6M New
ABUS Arbutus Biopharma Corp. 5.37% 2,450,421 $8.6M New
STHO Star Holdings filed as STAR HLDGS 4.72% 883,897 $7.5M Reduce -6.6%
OPTU Optimum Communications Inc. Class A filed as ALTICE USA INC 2.53% 1,517,818 $4.0M Add +55.5%
NBIS Nebius Group NV 2.26% 171,000 $3.6M Add +31.5%
IHRT Iheartmedia Inc. Class A 1.96% 1,891,770 $3.1M New
HOUS Anywhere Real Estate Inc. 1.36% 651,381 $2.2M New

Options reported separately and not counted above: IWM puts ($79.8M), TDS puts ($51.7M), JWN calls ($18.1M), KSS puts ($818K), MPT puts ($265K).

Other holdings (4): bonds, preferreds, convertibles and warrants · $52.7M (not counted above)
SecurityClassShares / PrincipalValueChange
LUMENTUM HOLDINGS INC (LITE 1.5 12/15/29) NOTE 1.500%12/1 · principal 27,000,000$31.8MNew
CAPITAL SOUTHWEST CORP (CSWC 5.125 11/15/29) NOTE 5.125%11/1 · principal 21,500,000$20.9MNew
MDAIW Spectral AI -CW27 *W EXP 09/11/202 11,666$3KNo change
SDAWW Suncar Technology Group -28 *W EXP 05/17/202 10,000$2KNo change

Total filed on the 13F, all lines: $212.1M.

Portfolio Sells Q4 2024 → Q1 2025
EQT Eqt Corp. Sold out 0.00% −11.63
INDV Indivior Ltd. Sold out 0.00% −4.04
STHO Star Holdings Reduce -6.6% 4.72% −3.31
TMQ Trilogy Metals Inc. Sold out 0.00% −2.57
OPITQ Office Properties Income Tru Sold out 0.00% −1.38

Portfolio Buys Q4 2024 → Q1 2025
TLN Talen Energy Corp. New 10.97% +10.97
LITE Lumentum Holdings Inc. New 6.74% +6.74
ROIV Roivant Sciences Ltd. New 5.38% +5.38
ABUS Arbutus Biopharma Corp. New 5.37% +5.37
IHRT Iheartmedia Inc. Class A New 1.96% +1.96
HOUS Anywhere Real Estate Inc. New 1.36% +1.36
OPTU Optimum Communications Inc. Class A Add +55.5% 2.53% +0.48
NBIS Nebius Group NV Add +31.5% 2.26% −0.87
VISN Vistance Networks Inc. Add +20.2% 23.81% −3.20
TDS Telephone and Data Systems Add +6.3% 34.90% −5.26

Options Activity Q4 2024 → Q1 2025
IWM iShares Russell 2000 ETF put Add +26.0% 400,000 $79.8M
TDS Telephone and Data Systems put Add +46.9% 1,335,400 $51.7M
K Kellanova call Sold out 358,100 $29.0Mbefore exit
PSEC Prospect Capital Corp. put Sold out 2,132,600 $9.2Mbefore exit
ABR Arbor Realty Trust Inc. call Sold out 590,900 $8.2Mbefore exit
LUMN Lumen Technologies Inc. put Sold out 550,000 $2.9Mbefore exit
FYBR Frontier Communications Pare call Sold out 58,300 $2.0Mbefore exit
PSEC Prospect Capital Corp. call Sold out 303,000 $1.3Mbefore exit
KSS Kohls Corp. put Add +300.0% 100,000 $818K
KOS Kosmos Energy Ltd. put Sold out 150,000 $513Kbefore exit
VISN Vistance Networks Inc. call Sold out 59,500 $310Kbefore exit

Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.

Notes & Other Activity Q4 2024 → Q1 2025
LUMENTUM HOLDINGS INC (LITE 1.5 12/15/29) NOTE 1.500%12/1 · principal New 27,000,000 $31.8M
CAPITAL SOUTHWEST CORP (CSWC 5.125 11/15/29) NOTE 5.125%11/1 · principal New 21,500,000 $20.9M
BAERW Wildfire New Pubco Inc.-27 *W EXP 01/24/202 Sold out 10,000 $437before exit

Bonds, preferreds, convertibles and warrants; not part of the stock holdings or percentages above.

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 13$370.4MDPC, PPLI, TDS, ECHO, VSAT
Q1 2026 11$203.4MVISN, TDS, HOLX, TDAY, ECHO
Q4 2025 10$193.3MECHO, TDS, VISN, TDAY, IHRT
Q3 2025 10$252.5MTDS, ECHO, VISN, LITE, CIEN
Q2 2025 10$155.3MTDS, VISN, CIEN, ROIV, ABUS
Q1 2025 11$159.4MTDS, VISN, TLN, LITE, ROIV
Q4 2024 9$114.7MTDS, VISN, EQT, STHO, INDV