Port Capital LLC

Q3 2025 13F-HR Holdings

Location
Chicago, IL
Holdings as of
9/30/2025
Date filed
11/14/2025
Form type
13F-HR
Num holdings
84
Total value ($000)
$2,399,414
Net value change ($000)
+47,771 (2.0%)
New positions
4
Sold out positions
5
Turnover %
3.9%
Sector allocation + QoQ delta (equities-only)
Prev filing: 8/14/2025 Next filing: 2/17/2026 SEC filing

Snapshot: Change Analysis

Compared to Q2 2025
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
SPGI 23,318 NEW
ORI 20,632 NEW
ATMU 19,409 NEW
APH 17,783 15.4%
ORLY 17,407 19.9%
TDY 15,491 15.7%
SPXC 9,374 12.3%
WTS 8,973 14.7%
WINA 7,997 19.6%
SSD 5,530 8.8%
Top Reduces (Value $000, Stocks/ETFs)
ONTO -15,801 -100.0%
FISV -14,497 -25.0%
IEX -13,985 -43.9%
SIGI -13,533 -100.0%
RLI -11,196 -10.0%
ROP -10,257 -24.2%
PGR -6,963 -7.5%
KNSL -5,912 -11.2%
BRO -5,725 -15.1%
ICE -5,605 -8.1%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type