Port Capital LLC

In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), Port Capital LLC reported 84 stock positions worth $2.4 billion. Its top holding was Heico Class A (HEI.A) at 9.1% of the portfolio, followed by RBC Bearings (RBC, 6.0%) and Amphenol Class A (APH, 5.6%). Compared with Q2 2025, it opened 4 new positions, sold out of 5, added to 32 and reduced 27. The biggest buy was a new position in S&P Global (SPGI) and the biggest sale an exit from Onto Innovation (ONTO).

Most Recent 13F
Q2 2026
Location
CHICAGO, IL
CIK
0001729212
Portfolio Value
$2.4B (Q3 2025)
SEC Filing
0001104659-25-112411 ↗ filed Nov 14, 2025

Holdings Value

0$500.0M$1.0B$1.5B$2.0B$2.5B Q1 2024: $2.0B Q1 2024 Q2 2024: $2.0B Q2 2024 Q3 2024: $2.2B Q3 2024 Q4 2024: $2.2B Q4 2024 Q1 2025: $2.2B Q1 2025 Q2 2025: $2.4B Q2 2025 Q3 2025: $2.4B $2.4B Q3 2025 Q4 2025: $2.3B Q4 2025 Q1 2026: $2.2B Q1 2026 Q2 2026: $2.5B Q2 2026

Holdings 84 stocks · $2.4B
HEI.A Heico Corp. Class A 9.07% 856,191 $217.6M Add +0.6%
RBC RBC Bearings Inc. 5.98% 367,848 $143.6M Add +0.9%
APH Amphenol Corp. Class A 5.56% 1,078,749 $133.5M Reduce -7.9%
TDY Teledyne Technologies Inc. 4.75% 194,309 $113.9M Add +1.2%
ORLY O'reilly Automotive Inc. 4.37% 972,592 $104.9M Add +0.2%
RLI Rli Corp. 4.18% 1,538,043 $100.3M Reduce -0.4%
SPXC SPX Technologies Inc. 3.57% 459,209 $85.8M Add +0.8%
PGR Progressive Corp. 3.56% 345,935 $85.4M Reduce -0.1%
AME Ametek Inc. 3.55% 452,594 $85.1M Reduce -5.0%
LIN Linde PLC 3.48% 176,019 $83.6M Add +0.1%
GGG Graco Inc. 3.05% 861,083 $73.2M Add +1.0%
WTS Watts Water Technologies-A 2.92% 251,206 $70.2M Add +1.0%
SSD Simpson Manufacturing Co. Inc. 2.83% 406,210 $68.0M Add +0.9%
CPRT Copart Inc. 2.68% 1,430,014 $64.3M Add +1.2%
ICE Intercontinental Exchange Inc. 2.67% 379,956 $64.0M Add +0.1%
PH Parker Hannifin Corp. 2.63% 83,126 $63.0M Add +0.2%
MA Mastercard Inc. Class A 2.62% 110,579 $62.9M Add +0.2%
CACI Caci International Inc. Class A 2.47% 118,661 $59.2M Add +1.0%
ACGL Arch Capital Group Ltd. 2.46% 650,272 $59.0M Reduce -0.2%
WINA Winmark Corp. 2.04% 98,118 $48.8M Reduce -9.3%
KNSL Kinsale Capital Group Inc. 1.94% 109,693 $46.6M Add +1.0%
ULS Ul Solutions Inc. Class A 1.85% 625,325 $44.3M Add +1.0%
FISV Fiserv Inc. 1.81% 337,120 $43.5M Add +0.3%
CP Canadian Pacific Kansas City 1.64% 528,799 $39.4M Add +0.4%
V Visa Inc. Class A 1.60% 112,492 $38.4M Add +0.1%
SHW The Sherwin-Williams Co. 1.54% 106,868 $37.0M Add +0.2%
PB Prosperity Bancshares Inc. 1.53% 553,083 $36.7M Add +0.9%
ADP Automatic Data Processing 1.52% 123,979 $36.4M Add +0.3%
GBCI Glacier Bancorp Inc. 1.42% 699,148 $34.0M Add +0.9%
BRO Brown & Brown Inc. 1.34% 343,450 $32.2M Add +0.4%
ROP Roper Technologies Inc. 1.34% 64,329 $32.1M Reduce -13.9%
UNH Unitedhealth Group Inc. 1.19% 82,659 $28.5M Reduce -2.9%
SPGI S&P Global Inc. 0.97% 47,910 $23.3M New
ORI Old Republic Intl Corp. 0.86% 485,805 $20.6M New
ATMU Atmus Filtration Technologie 0.81% 430,460 $19.4M New
IEX Idex Corp. 0.74% 109,791 $17.9M Reduce -39.5%
RSP Invesco S&P 500 Equal Weight 0.70% 88,630 $16.8M Add +0.8%
AAPL Apple Inc. 0.52% 48,852 $12.4M Reduce -0.9%
SPY SS SPDR S&P 500 ETF Trust-US 0.32% 11,392 $7.6M Reduce -0.2%
MSFT Microsoft Corp. 0.24% 11,228 $5.8M Reduce -19.8%
CL Colgate-Palmolive Co. 0.22% 66,589 $5.3M Reduce -2.0%
GOOG Alphabet Inc. Class C 0.17% 16,270 $4.0M Reduce -2.5%
SCHF Schwab Intl Equity ETF 0.14% 143,017 $3.3M No change
GOOGL Alphabet Inc. Class A 0.08% 7,864 $1.9M Reduce -6.0%
AMZN Amazon.com Inc. 0.06% 7,010 $1.5M Reduce -4.7%
IAU iShares Gold Trust 0.06% 19,750 $1.4M Reduce -5.3%
CSW CSW Industrials Inc. 0.06% 5,900 $1.4M No change
IJR iShares Core S&P Small-Cap E 0.05% 9,933 $1.2M Add +0.0%
VTI VG Morningstar TS MKT ETF-US 0.05% 3,490 $1.1M Reduce -2.8%
JPM JPMorgan Chase & Co. 0.05% 3,627 $1.1M Reduce -3.4%
IBM Intl Business Machines Corp. filed as INTERNATIONAL BUSINESS MACHS 0.04% 3,441 $971K No change
TXN Texas Instruments Inc. 0.04% 5,234 $962K No change
JNJ Johnson & Johnson 0.04% 5,079 $942K No change
ARCC Ares Capital Corp. 0.04% 43,000 $878K No change
TEL Te Connectivity PLC 0.04% 3,910 $858K Reduce -1.7%
BRK.B Berkshire Hathaway Inc. Class B 0.03% 1,636 $822K Add +7.0%
ABT Abbott Laboratories 0.03% 5,900 $790K No change
SPDW Ste STR SPDR PT DW Eu ETF 0.03% 18,000 $770K No change
MAR Marriott International Class A 0.03% 2,907 $757K No change
PBR.A Petroleo Brasil-SP Pref ADR 0.03% 62,467 $738K No change
MRK Merck & Co. Inc. 0.03% 7,745 $650K No change
IWS iShares Russell Mid-Cap Valu 0.03% 4,609 $644K Add +0.3%
MCD McDonald's Corp. 0.03% 2,039 $620K Add +1.2%
VT Vanguard Tot World STK ETF 0.02% 4,316 $595K No change
RYAN Ryan Specialty Holdings Inc. 0.02% 10,000 $564K No change
TMO Thermo Fisher Scientific Inc. 0.02% 1,134 $550K Reduce -1.5%
EPD Enterprise Products Partners 0.02% 15,250 $477K No change
EL Estee Lauder Companies Class A filed as LAUDER ESTEE COS INC 0.02% 5,351 $472K Reduce -4.1%
ITW Illinois Tool Works 0.02% 1,578 $411K No change
BX Blackstone Inc. 0.02% 2,370 $405K Reduce -2.5%
UL Unilever PLC 0.02% 6,500 $385K No change
COP Conocophillips 0.02% 3,977 $376K Reduce -6.5%
COST Costco Wholesale Corp. 0.01% 376 $348K Reduce -3.1%
PSX Phillips 66 0.01% 2,518 $342K No change
META Meta Platforms Inc. Class A 0.01% 436 $320K Reduce -4.8%
GBDC Golub Capital BDC Inc. 0.01% 22,000 $301K No change
ACWI iShares MSCI Acwi ETF 0.01% 2,000 $276K No change
AXP American Express Co. 0.01% 829 $275K Reduce -2.8%
SCHC Schwab Intl Small-Cap Equity 0.01% 6,000 $273K No change
KVUE Kenvue Inc. 0.01% 15,994 $260K Add +10.6%
HON Honeywell International Inc. 0.01% 1,173 $247K Add +2.8%
PFE Pfizer Inc. 0.01% 9,219 $235K Add +3.9%
PPL PPL Corp. 0.01% 5,654 $210K New
SLDP Solid Power Inc. 0.00% 19,750 $69K No change

Portfolio Sells Q2 2025 → Q3 2025
ONTO Onto Innovation Inc. Sold out 0.00% −0.67
IEX Idex Corp. Reduce -39.5% 0.74% −0.61
SIGI Selective Insurance Group Sold out 0.00% −0.58
RLI Rli Corp. Reduce -0.4% 4.18% −0.56
ROP Roper Technologies Inc. Reduce -13.9% 1.34% −0.46
PGR Progressive Corp. Reduce -0.1% 3.56% −0.37
AME Ametek Inc. Reduce -5.0% 3.55% −0.12
ACGL Arch Capital Group Ltd. Reduce -0.2% 2.46% −0.06
MSFT Microsoft Corp. Reduce -19.8% 0.24% −0.05
CL Colgate-Palmolive Co. Reduce -2.0% 0.22% −0.04
NTRS Northern Trust Corp. Sold out 0.00% −0.03
TW Tradeweb Markets Inc. Class A Sold out 0.00% −0.01
AON Aon PLC Class A Sold out 0.00% −0.01
AMZN Amazon.com Inc. Reduce -4.7% 0.06% −0.00
COST Costco Wholesale Corp. Reduce -3.1% 0.01% −0.00
META Meta Platforms Inc. Class A Reduce -4.8% 0.01% −0.00
COP Conocophillips Reduce -6.5% 0.02% −0.00
AXP American Express Co. Reduce -2.8% 0.01% −0.00
EL Estee Lauder Companies Class A Reduce -4.1% 0.02% +0.00
VTI VG Morningstar TS MKT ETF-US Reduce -2.8% 0.05% +0.00
BX Blackstone Inc. Reduce -2.5% 0.02% +0.00
JPM JPMorgan Chase & Co. Reduce -3.4% 0.05% +0.00
TMO Thermo Fisher Scientific Inc. Reduce -1.5% 0.02% +0.00
IAU iShares Gold Trust Reduce -5.3% 0.06% +0.00
TEL Te Connectivity PLC Reduce -1.7% 0.04% +0.01
SPY SS SPDR S&P 500 ETF Trust-US Reduce -0.2% 0.32% +0.02
GOOGL Alphabet Inc. Class A Reduce -6.0% 0.08% +0.02
GOOG Alphabet Inc. Class C Reduce -2.5% 0.17% +0.04
UNH Unitedhealth Group Inc. Reduce -2.9% 1.19% +0.06
AAPL Apple Inc. Reduce -0.9% 0.52% +0.09
WINA Winmark Corp. Reduce -9.3% 2.04% +0.30
APH Amphenol Corp. Class A Reduce -7.9% 5.56% +0.64

Portfolio Buys Q2 2025 → Q3 2025
SPGI S&P Global Inc. New 0.97% +0.97
ORI Old Republic Intl Corp. New 0.86% +0.86
ATMU Atmus Filtration Technologie New 0.81% +0.81
ORLY O'reilly Automotive Inc. Add +0.2% 4.37% +0.65
TDY Teledyne Technologies Inc. Add +1.2% 4.75% +0.56
SPXC SPX Technologies Inc. Add +0.8% 3.57% +0.33
WTS Watts Water Technologies-A Add +1.0% 2.92% +0.32
SSD Simpson Manufacturing Co. Inc. Add +0.9% 2.83% +0.18
PH Parker Hannifin Corp. Add +0.2% 2.63% +0.16
GBCI Glacier Bancorp Inc. Add +0.9% 1.42% +0.15
CACI Caci International Inc. Class A Add +1.0% 2.47% +0.09
RSP Invesco S&P 500 Equal Weight Add +0.8% 0.70% +0.02
RBC RBC Bearings Inc. Add +0.9% 5.98% +0.02
PPL PPL Corp. New 0.01% +0.01
IJR iShares Core S&P Small-Cap E Add +0.0% 0.05% +0.00
BRK.B Berkshire Hathaway Inc. Class B Add +7.0% 0.03% +0.00
IWS iShares Russell Mid-Cap Valu Add +0.3% 0.03% +0.00
MCD McDonald's Corp. Add +1.2% 0.03% +0.00
PFE Pfizer Inc. Add +3.9% 0.01% +0.00
HON Honeywell International Inc. Add +2.8% 0.01% −0.00
KVUE Kenvue Inc. Add +10.6% 0.01% −0.00
SHW The Sherwin-Williams Co. Add +0.2% 1.54% −0.01
MA Mastercard Inc. Class A Add +0.2% 2.62% −0.02
LIN Linde PLC Add +0.1% 3.48% −0.02
GGG Graco Inc. Add +1.0% 3.05% −0.07
ULS Ul Solutions Inc. Class A Add +1.0% 1.85% −0.07
V Visa Inc. Class A Add +0.1% 1.60% −0.10
ADP Automatic Data Processing Add +0.3% 1.52% −0.10
PB Prosperity Bancshares Inc. Add +0.9% 1.53% −0.11
CP Canadian Pacific Kansas City Add +0.4% 1.64% −0.13
CPRT Copart Inc. Add +1.2% 2.68% −0.27
BRO Brown & Brown Inc. Add +0.4% 1.34% −0.27
KNSL Kinsale Capital Group Inc. Add +1.0% 1.94% −0.29
ICE Intercontinental Exchange Inc. Add +0.1% 2.67% −0.29
HEI.A Heico Corp. Class A Add +0.6% 9.07% −0.30
FISV Fiserv Inc. Add +0.3% 1.81% −0.65

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 108$2.5BHEI.A, RBC, TDY, APH, SPXC
Q1 2026 82$2.2BRBC, HEI.A, TDY, APH, AME
Q4 2025 82$2.3BHEI.A, RBC, APH, TDY, AME
Q3 2025 84$2.4BHEI.A, RBC, APH, TDY, ORLY
Q2 2025 85$2.4BHEI.A, RBC, APH, RLI, TDY
Q1 2025 87$2.2BHEI.A, RLI, RBC, ORLY, TDY
Q4 2024 88$2.2BHEI.A, RLI, RBC, APH, TDY
Q3 2024 87$2.2BHEI.A, RLI, RBC, APH, TDY
Q2 2024 85$2.0BHEI.A, RLI, RBC, CPRT, APH
Q1 2024 87$2.0BHEI.A, RLI, CPRT, RBC, TDY