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Port Capital Portfolio holdings

AUM $2.25B
1-Year Est. Return 13.28%
This Fund
S&P 500
This Quarter Est. Return
+3.29%
1 Year Est. Return
+13.28%
3 Year Est. Return
+65.31%
5 Year Est. Return
+99.15%
10 Year Est. Return
–
AUM
$2.4B
AUM Growth
+$47.8M
Cap. Flow
+$3.09M
Cap. Flow %
0.13%
Top 10 Hldgs %
48.08%
Holding
89
New
4
Increased
32
Reduced
27
Closed
5

Top Buys

Rank Stock Value
1
SPGI icon
S&P Global
SPGI
+$25.7M
2
ORI icon
Old Republic International
ORI
+$18.7M
3
ATMU icon
Atmus Filtration Technologies
ATMU
+$18.1M
4
HEI.A icon
HEICO Corp Class A
HEI.A
+$1.3M
5
RBC icon
RBC Bearings
RBC
+$1.28M

Top Sells

Rank Stock Value
1
ONTO icon
Onto Innovation
ONTO
+$15.8M
2
SIGI icon
Selective Insurance
SIGI
+$13.5M
3
IEX icon
IDEX
IEX
+$12.1M
4
APH icon
Amphenol
APH
+$10.2M
5
ROP icon
Roper Technologies
ROP
+$5.53M

Sector Composition

Rank Sector Weight
1 Industrials 37.77%
2 Financials 25.34%
3 Technology 18.32%
4 Materials 7.86%
5 Consumer Discretionary 7.34%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
GBDC icon
76
Golub Capital BDC
GBDC
$3.44B
$301K 0.01%
22,000
– –
ACWI icon
77
iShares MSCI ACWI ETF
ACWI
$32.8B
$276K 0.01%
2,000
– –
AXP icon
78
American Express
AXP
$232B
$275K 0.01%
829
-24
-3% -$7.63K
SCHC icon
79
Schwab International Small-Cap Equity ETF
SCHC
$5.45B
$273K 0.01%
6,000
– –
KVUE icon
80
Kenvue
KVUE
$37B
$260K 0.01%
15,994
+1,537
+11% +$31.4K
HON icon
81
Honeywell
HON
$77.7B
$247K 0.01%
1,245
+34
+3% +$7.1K
PFE icon
82
Pfizer
PFE
$142B
$235K 0.01%
9,219
+342
+4% +$8.44K
PPL
83
PPL Corp
PPL
$26.4B
$210K 0.01%
+5,654
New +$203K
SLDP icon
84
Solid Power
SLDP
$475M
$69K ﹤0.01%
19,750
– –
AON icon
85
Aon
AON
$75.9B
– –
-600
Closed -$214K
NTRS icon
86
Northern Trust
NTRS
$33.2B
– –
-5,880
Closed -$746K
ONTO icon
87
Onto Innovation
ONTO
$13.4B
– –
-156,556
Closed -$15.8M
SIGI icon
88
Selective Insurance
SIGI
$5.67B
– –
-156,178
Closed -$13.5M
TW icon
89
Tradeweb Markets
TW
$21.2B
– –
-1,750
Closed -$256K
1 2 3
4

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Port Capital's Q3 2025 Portfolio in Review

As of Q3 2025, Port Capital held 89 positions worth $2.4B, up 2% from $2.35B the previous quarter. Its ten largest holdings account for 48% of the portfolio.

Port Capital's Q3 2025 filing shows 4 new, 32 increased, 27 reduced and 5 closed positions. Its largest new stake was S&P Global: 47,910 shares worth $23.3M. The largest sale was Onto Innovation, an estimated $15.8M.

By sector, the portfolio is most concentrated in Industrials at 38% of assets, down from 39% a quarter earlier, followed by Financials and Technology.

  • Port Capital's largest Q3 2025 buy was S&P Global: 47,910 shares worth $23.3M.
  • Port Capital added most to HEICO Corp Class A in Q3 2025, an estimated $1.3M increase.
  • Port Capital's biggest Q3 2025 reduction was IDEX, cutting an estimated $12.1M.
  • Port Capital fully exited Onto Innovation in Q3 2025, selling an estimated $15.8M.
  • Port Capital's ten largest holdings make up 48% of its $2.4B portfolio in Q3 2025.
  • Port Capital opened 4 new positions and closed 5 in Q3 2025.
  • Port Capital's portfolio value rose 2% quarter-over-quarter to $2.4B.

Based on Port Capital's 13F filing for Q3 2025, filed 14 Nov 2025.