Terminal · Institutions

Every 13F-reported equity position this quarter, with its quarter-over-quarter change — each row traces back to the SEC filing.

Port Capital LLC 13F Holdings -- Portfolio & Top Positions (2026-03-31)

Port Capital LLC (CIK 1729212) reported $2.25B across 81 reported positions in its SEC 13F filing for 2026-03-31. Largest positions: RBC ($186.7M, 8.30%), HEI.A ($174.4M, 7.75%), TDY ($151.8M, 6.75%), APH ($102.7M, 4.57%), AME ($92.7M, 4.12%). Source: SEC Form 13F.

RankTickerCompanyValue% PortfolioSharesAction
1RBCRBC BEARINGS INC$186.7M8.30%343,831Trimmed
2HEI.AHEICO CORP NEW$174.4M7.75%826,086Trimmed
3TDYTELEDYNE TECHNOLOGIES INC$151.8M6.75%250,831Added
4APHAMPHENOL CORP$102.7M4.57%812,604Trimmed
5AMEAMETEK INC$92.7M4.12%432,246Trimmed
6SPXCSPX TECHNOLOGIES INC$92.0M4.09%460,289Trimmed
7ORLYOREILLY AUTOMOTIVE INC$87.0M3.87%942,570Trimmed
8LINLINDE PLC$84.7M3.77%170,919Trimmed
9RLIRLI CORP$79.1M3.52%1.4MTrimmed
10GGGGRACO INC$77.6M3.45%916,397Added
11PHPARKER-HANNIFIN CORP$75.8M3.37%84,638Trimmed
12WTSWATTS WATER TECHNOLOGIES INC$74.7M3.32%257,406Added
13SSDSIMPSON MFG INC$70.0M3.11%408,069Trimmed
14ICEINTERCONTINENTAL EXCHANGE INC$57.6M2.56%366,233Trimmed
15CACICACI INTL INC$55.7M2.48%102,502Added
16ATMUATMUS FILTRATION TECHNOLOGIES$51.6M2.29%908,680Added
17ULSUL SOLUTIONS INC$49.7M2.21%579,675Trimmed
18CPRTCOPART INC$49.7M2.21%1.5MAdded
19MAMASTERCARD INCORPORATED$49.4M2.20%98,867Trimmed
20ACGLARCH CAP GROUP LTD$48.8M2.17%508,652Trimmed
21PGRPROGRESSIVE CORP$48.4M2.15%244,335Trimmed
22CPCANADIAN PACIFIC KANSAS CITY$44.2M1.97%563,874Added
23WINAWINMARK CORP$42.0M1.87%98,186Trimmed
24ETNEATON CORP PLC$38.4M1.71%107,453Added
25SHWSHERWIN WILLIAMS CO$38.3M1.70%119,587Added

Source: SEC Form 13F filings · as of 2026-03-31