Port Capital LLC — 13F Holdings & Portfolio

CIK 1729212 · latest 13F-HR filed 2026-08-14

Port Capital LLC manages $2.45B in 13F-reported U.S. long-equity assets across 108 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are HEI.A (8.47%), RBC (7.63%), TDY (6.65%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 27 new positions and exited 1; 45 existing positions rose in reported value and 15 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

AUM

$2.45B

Long-equity book

Holdings

108

Distinct positions

Period

2026-06-30

Filed 2026-08-14

Q/Q Activity

+27 / −1 / ↑45 / ↓15

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26

HEI.A8.5% · -3%RBC7.6% · -16%TDY6.6% · -3%APH5.4% · -8%SPXC4.5% · -3%AME4.2% · -2%WTS4.0% · -3%LIN3.6% · -2%ORLY3.5% · -2%SSD3.4% · -3%PH3.3% · -2%RLI3.2% · -3%GGG2.7% · -3%CACI2.3% · +18%ATMU2.2% · +14%PGR2.1% · -3%MA2.0% · -1%ETN2.0% · +6%ACGL2.0% · -2%ULS2.0% · -19%CP2.0% · -2%ICE1.8% · -2%V1.7% · +5%CPRT1.7% · -3%SHW1.7% · -2%WINA1.5% · -12%PB1.4% · -10%AXP1.4% · +4%KNSL1.3% · -3%ORI1.2% · -3%GBCI1.1% · -3%IEX1.0% · -2%DGII1.0% · +24%MDLN0.9% · +94%RSP0.8% · -0%AAPL0.6% · +3%SPY0.5% · +38%SPGI0.5% · +1%MSI0.5% · new RVTY0.4% · new CL0.2% · -1%GOOG0.2% · +1%SCHF0.2% · -0%MSFT0.1% · -7%GOOGL0.1% · +12%AMZN0.1% · +19%IJR0.1% · +2%IAU0.1% · +1%CSW0.1% · -2%JNJ0.1% · +8%TXN0.1% · -2%VTI0.0% · 0%MAR0.0% · +7%BRK.B0.0% · +40%JPM0.0% · -16%MRK0.0% · -4%SPDW0.0% · 0%IBM0.0% · -1%NVDA0.0% · new ACWI0.0% · +148%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 51.1%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

Assets Under Management

$2.85B

Discretionary

$2.72B

Employees

Accounts

483

Address

180 NORTH STETSON AVENUE
SUITE 5700
CHICAGO, IL 60601

Phone

(312) 788-2400

Website

WWW.PORTCAPLLC.COM
WWW.LINKEDIN.COM/COMPANY/PORT-CAPITAL-LLC

Name	Title / Status	Ownership	Type
OBRIEN, BRIEN, MICHAEL Control	CHAIRMAN & CEO	50–75%	Individual
CALABRESE, BRIAN, E	VICE PRESIDENT - OPERATIONS	Less than 5%	Individual
DUFFEY, THOMAS, J	TRUSTEE	General partner	Individual
LARAMIE, MICHAEL, J	HEAD TRADER	Less than 5%	Individual
LOEB, EDWARD, STRAUS	PARTNER	5–10%	Individual
MCBRIDE, SEAN, P	RESEARCH ANALYST	Less than 5%	Individual
MEYERS, JONATHAN, D	CFO	Less than 5%	Individual
NEAL, CHARLES, E	ASSOCIATE PORTFOLIO MANANGER, SENIOR RESEARCH ANALYST	5–10%	Individual
PHELAN, KIMBERLY, A	VICE PRESIDENT - MARKETING & COMMUNICATIONS	Less than 5%	Individual
PLANTING FIELD TRUST	MEMBER	10–25%	Domestic Entity
ROTHMEYER, TRACY, ELIZABETH	CHIEF COMPLIANCE OFFICER, CHIEF OPERATING OFFICER	5–10%	Individual
ROTHMEYER, TRACY, ELIZABETH	CHIEF COMPLIANCE OFFICER, CHIEF OPERATING OFFICER	General partner	Individual

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

HEICO CORP NEW$33.1M +19.0%
AMPHENOL CORP$28.5M +27.7%
WATTS WATER TECHNOLOGIES INC$22.7M +30.4%
SPX TECHNOLOGIES INC$17.1M +18.6%
SIMPSON MFG INC$12.5M +17.9%

Show all 45 →

Top Trims

INTERCONTINENTAL EXCHANGE INC-$13.2M -22.9%
GRACO INC-$10.6M -13.7%
COPART INC-$8.9M -17.9%
WINMARK CORP-$5.3M -12.6%
KINSALE CAP GROUP INC-$2.3M -6.8%

Show all 15 →

New Positions

Show all 27 →

Exited Positions

HONEYWELL INTL INC$260.4K

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#	Issuer	Symbol	CUSIP	Value	Δ

Port Capital LLC Holdings (2026-06-30)

#	Issuer	Symbol	CUSIP	Value	Weight	Shares	Type
1	HEICO CORP NEW	HEI.A	422806208	$207.5M	8.47%	804,484	SH
2	RBC BEARINGS INC	RBC	75524B104	$187.0M	7.63%	290,280	SH
3	TELEDYNE TECHNOLOGIES INC	TDY	879360105	$162.9M	6.65%	244,265	SH
4	AMPHENOL CORP	APH	032095101	$131.1M	5.35%	743,744	SH
5	SPX TECHNOLOGIES INC	SPXC	78473E103	$109.2M	4.46%	445,236	SH
6	AMETEK INC	AME	031100100	$102.4M	4.18%	423,376	SH
7	WATTS WATER TECHNOLOGIES INC	WTS	942749102	$97.4M	3.98%	248,896	SH
8	LINDE PLC	LIN	G54950103	$87.3M	3.56%	168,238	SH
9	OREILLY AUTOMOTIVE INC	ORLY	67103H107	$85.5M	3.49%	928,311	SH
10	SIMPSON MFG INC	SSD	829073105	$82.6M	3.37%	394,379	SH
11	PARKER-HANNIFIN CORP	PH	701094104	$81.1M	3.31%	82,922	SH
12	RLI CORP	RLI	749607107	$79.5M	3.24%	1,345,839	SH
13	GRACO INC	GGG	384109104	$67.0M	2.73%	885,786	SH
14	CACI INTL INC	CACI	127190304	$55.9M	2.28%	120,771	SH
15	ATMUS FILTRATION TECHNOLOGIES	ATMU	04956D107	$52.7M	2.15%	1,034,293	SH
16	PROGRESSIVE CORP	PGR	743315103	$51.9M	2.12%	237,808	SH
17	MASTERCARD INCORPORATED	MA	57636Q104	$50.1M	2.04%	97,535	SH
18	EATON CORP PLC	ETN	G29183103	$48.4M	1.97%	113,550	SH
19	ARCH CAP GROUP LTD	ACGL	G0450A105	$48.2M	1.97%	496,956	SH
20	UL SOLUTIONS INC	ULS	903731107	$48.0M	1.96%	470,862	SH
21	CANADIAN PACIFIC KANSAS CITY	CP	13646K108	$47.9M	1.96%	552,701	SH
22	INTERCONTINENTAL EXCHANGE INC	ICE	45866F104	$44.4M	1.81%	360,521	SH
23	VISA INC	V	92826C839	$42.1M	1.72%	122,593	SH
24	COPART INC	CPRT	217204106	$40.8M	1.66%	1,446,844	SH
25	SHERWIN WILLIAMS CO	SHW	824348106	$40.5M	1.65%	117,695	SH
26	WINMARK CORP	WINA	974250102	$36.7M	1.50%	86,767	SH
27	PROSPERITY BANCSHARES INC	PB	743606105	$33.7M	1.37%	461,055	SH
28	AMERICAN EXPRESS CO	AXP	025816109	$33.5M	1.37%	99,114	SH
29	KINSALE CAP GROUP INC	KNSL	49714P108	$31.1M	1.27%	94,240	SH
30	OLD REP INTL CORP	ORI	680223104	$30.2M	1.23%	738,980	SH
31	GLACIER BANCORP INC NEW	GBCI	37637Q105	$26.2M	1.07%	508,074	SH
32	IDEX CORP	IEX	45167R104	$24.6M	1.00%	108,202	SH
33	DIGI INTL INC	DGII	253798102	$24.1M	0.98%	321,072	SH
34	MEDLINE INC	MDLN	58507V107	$22.9M	0.93%	579,886	SH
35	INVESCO EXCHANGE TRADED FD TR	RSP	46137V357	$18.5M	0.76%	87,000	SH
36	APPLE INC	AAPL	037833100	$13.9M	0.57%	48,058	SH
37	STATE STR SPDR S&P 500 ETF TR	SPY	78462F103	$11.7M	0.48%	15,626	SH
38	S&P GLOBAL INC	SPGI	78409V104	$11.7M	0.48%	28,633	SH
39	MOTOROLA SOLUTIONS INC	MSI	620076307	$11.5M	0.47%	27,742	SH
40	REVVITY INC	RVTY	714046109	$9.6M	0.39%	85,992	SH
41	COLGATE PALMOLIVE CO	CL	194162103	$6.0M	0.25%	65,733	SH
42	ALPHABET INC	GOOG	02079K107	$5.7M	0.23%	16,205	SH
43	SCHWAB STRATEGIC TR	SCHF	808524805	$4.1M	0.17%	146,386	SH
44	MICROSOFT CORP	MSFT	594918104	$3.6M	0.15%	9,532	SH
45	ALPHABET INC	GOOGL	02079K305	$3.1M	0.13%	8,740	SH
46	AMAZON COM INC	AMZN	023135106	$2.0M	0.08%	8,347	SH
47	ISHARES TR	IJR	464287804	$1.6M	0.07%	10,898	SH
48	ISHARES GOLD TR	IAU	464285204	$1.5M	0.06%	19,401	SH
49	CSW INDUSTRIALS INC	CSW	126402106	$1.4M	0.06%	5,000	SH
50	JOHNSON & JOHNSON	JNJ	478160104	$1.4M	0.06%	5,386	SH

Filing History

Period	Filed	AUM	Holdings	Accession
2026-06-30	2026-08-14	$2.45B	108	0001104659-26-097336
2026-03-31	2026-05-15	$2.25B	82	0001104659-26-062522
2025-12-31	2026-02-17	$2.32B	82	0001104659-26-016441
2025-09-30	2025-11-14	$2.40B	84	0001104659-25-112411

Filer Information

Address

180 NORTH STETSON AVENUE, SUITE 5700
CHICAGO, IL 60601

Phone

(312) 788-2400

Filing Manager

Port Capital LLC

CHICAGO, IL

Signatory

Tracy Rothmeyer

Chief Operating Officer and Chief Compliance Officer