13F Insight
DOSSIER · 13F-HR · Q1 2026

Port Capital LLC

$2.2B in tracked AUM across 82 positions as of Q1 2026.

PC
CIK 0001729212 · last filed Mar 31, 2026
Total AUM
$2.2B
as of Q1 2026
Holdings
82
—
positions
Whale Score
63
63
tracked
Activity
—
no data
changes this Q
AI Analysis · Q1 2026

Portfolio Overview

Port Capital LLC’s 13F filing for the period ending September 30, 2025, reveals a period of significant consolidation and capital reallocation. The firm saw its total portfolio value decrease sharply by 65.8%, dropping from $2.35 billion to $803.73 million. This reduction was driven not merely by market performance but by a substantial restructuring of the portfolio, evidenced by the exit of 33 positions and the initiation of 16 new ones. Consequently, the number of holdi...

The portfolio is highly concentrated, with the top ten positions accounting for approximately 78.9% of the total assets. The turnover is aggressive, with zero positions remaining unchanged from the previous quarter. This suggests a strategy that is not "buy-and-hold" in nature but rather one that actively trims positions, likely to lock in gains or redeploy capital into higher-conviction ideas. The inclusion of ETFs (RSP, SPY) in the lower tier of the portfolio indicates a use of liquidity vehicles or broad market exposure rather than a passive indexing approach.

Key Holdings

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
RBC
RBC BEARINGS INC
$187M344K8.3%02
HEI/A
HEICO CORP NEW
$174M826K7.8%03
TDY
TELEDYNE TECHNOLOGIES INC
$152M251K6.7%04
APH
AMPHENOL CORP
$103M813K4.6%05
AME
AMETEK INC
$93M432K4.1%06
SPXC
SPX TECHNOLOGIES INC
$92M460K4.1%07
ORLY
OREILLY AUTOMOTIVE INC
$87M943K3.9%08
G54950103
LINDE PLC
$85M171K3.8%09
RLI
RLI CORP
$79M1.4M3.5%10
GGG
GRACO INC
$78M916K3.4%

Filing history

2026Q1Mar 31
$2.2B▼ 3.0%
82 positionsView →2025Q4Dec 31
$2.3B▲ 188.5%
82 positionsView →2025Q3Sep 30
$804M▼ 65.8%
33 positionsView →2025Q2Jun 30
$2.4B▲ 6.6%
85 positionsLocked2025Q1Mar 31
$2.2B▲ 0.7%
87 positionsLocked2024Q4Dec 31
$2.2B▼ 1.8%
88 positionsLocked2024Q3Sep 30
$2.2B▲ 11.8%
87 positionsLocked2024Q2Jun 30
$2.0B▲ 0.0%
85 positionsLocked2024Q1Mar 31
$2.0B▲ 11.3%
87 positionsLocked2023Q4Dec 31
$1.8B▲ 11.9%
89 positionsLocked2023Q3Sep 30
$1.6B▼ 3.6%
80 positionsLocked2023Q2Jun 30
$1.7B▲ 8.0%
80 positionsLocked
Showing 12 of 32