DOSSIER · 13F-HR · Q1 2026

FOURSIXTHREE CAPITAL LP

$268M in tracked AUM across 18 positions as of Q1 2026.

FC
CIK 0001897652 · last filed Mar 31, 2026
Total AUM
$268M
as of Q1 2026
Holdings
18
positions
Whale Score
69
69
tracked
Activity
no data
changes this Q
AI Analysis · Q1 2026

Portfolio Overview

FourSixThree Capital LP manages a highly concentrated portfolio characterized by a "high-conviction" investment philosophy. As of the report date September 30, 2025, the firm’s total assets under management (AUM) stood at approximately $212.33 million, spread across just 13 holdings. This represents a significant reduction in capital, with the portfolio value decreasing by 26.0% from the previous quarter's $286.78 million. The decline in value is likely attributable to a ...

Key Holdings

The portfolio is dominated by a few large-cap and mid-cap positions, primarily within the technology and communications infrastructure sectors.

  • CommScope Holding Company (VISN) is the unequivocal flagship holding, comprising 46.92% of the portfolio ($99.62M). The firm increased this stake by 23.1%, adding over $56 million during the quarter, indicating strong confidence in the company’s turnaround or growth prospects.
  • Lumentum Holdings (LITE) represents a complex position for the firm. The data shows two distinct entries for Lumentum: one position of $33.42M (15.74% of portfolio) and another of $10.89M (5.13%). While the firm aggressively added to the primary position (+763.6%), it simultaneously reduced a secondary position by 83.3%. This suggests potential portfolio rebalancing, tax-loss harvesting, or a shift between different share classes/voting rights.
  • Capital Southwest Corp (CSWC) is the third-largest holding at 10.08% ($21.39M), providing exposure to business development and financial services.
  • Roivant Sciences (ROIV) rounds out the top four, accounting for 6.69% of the portfolio.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
VISN
VISTANCE NETWORKS INC
$55M3.0M20.6%
02
HOLX
HOLOGIC INC
$47M620K17.5%
03
TDS
TELEPHONE & DATA SYS INC
$40M941K14.8%
04
CSWC 5.125 11/15/29
CAPITAL SOUTHWEST CORP
$29M28.8M11.0%
05
TDAY
USA TODAY CO INC
$16M2.3M6.1%
06
SATS
ECHOSTAR CORP
$16M138K6.0%
07
CAR
AVIS BUDGET GROUP INC
$13M90K4.9%
08
METC
RAMACO RES INC
$13M812K4.7%
09
DOW
DOW HLDGS INC
$11M268K4.2%
10
IAC
IAC INC
$11M275K4.1%

Filing history

2026Q1Mar 31
$268M 4.2%
18 positionsView →
2025Q4Dec 31
$257M 21.3%
17 positionsView →
2025Q3Sep 30
$212M 26.0%
13 positionsView →
2025Q2Jun 30
$287M 82.9%
19 positionsLocked
2025Q1Mar 31
$157M 45.5%
15 positionsLocked
2024Q4Dec 31
$288M 293.2%
25 positionsLocked
2023Q4Dec 31
$73M 61.8%
13 positionsLocked
2023Q3Sep 30
$191M 52.7%
15 positionsLocked
2023Q2Jun 30
$125M 245.9%
16 positionsLocked
2023Q1Mar 31
$36M 84.6%
19 positionsLocked
2022Q4Dec 31
$236M
38 positionsLocked