Institutional Manager · CIK 0001729212
Port Capital LLC
Chicago, IL · File #028-18218
Latest AUM
$2.32B
Positions
82
Top-10 Concentration
49.8%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| EXITED | FISERV INC | 337738108 | -337,120 | -$43.5M | $0 |
| EXITED | ROPER TECHNOLOGIES INC | 776696106 | -64,329 | -$32.1M | $0 |
| NEW | EATON CORP PLC | ETN | +86,309 | +$27.5M | $0 |
| ADD | ATMUS FILTRATION TECHNOLOGIES | ATMU | +446,260 | +$23.2M | +$2.9M |
| ADD | TELEDYNE TECHNOLOGIES INC | TDY | +42,165 | +$21.5M | -$14.6M |
| REDUCE | AMPHENOL CORP NEW | 032095101 | -150,071 | -$20.3M | +$12.3M |
| REDUCE | PROGRESSIVE CORP | 743315103 | -78,895 | -$18.0M | -$6.7M |
| REDUCE | UNITEDHEALTH GROUP INC | UNH | -52,265 | -$17.3M | -$1.3M |
| ADD | S&P GLOBAL INC | SPGI | +29,825 | +$15.6M | +$1.7M |
| REDUCE | AUTOMATIC DATA PROCESSING INC | ADP | -49,166 | -$12.6M | -$4.5M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202582 pos · $2.32B
- 13F HOLDINGS REPORTQ/E Sep 202584 pos · $2.40B
- 13F HOLDINGS REPORTQ/E Jun 202585 pos · $2.35B
- 13F HOLDINGS REPORTQ/E Mar 202587 pos · $2.21B
- 13F HOLDINGS REPORTQ/E Dec 202488 pos · $2.19B
- 13F HOLDINGS REPORTQ/E Sep 202487 pos · $2.23B
- 13F HOLDINGS REPORTQ/E Jun 202485 pos · $2.00B
- 13F HOLDINGS REPORTQ/E Mar 202487 pos · $1.99B
- 13F HOLDINGS REPORTQ/E Dec 202380 pos · $1.60B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | HEICO CORP NEW | HEI-A | 860,156 | $217.1M | 9.44% |
| 2 | RBC BEARINGS INC | RBC | 369,853 | $165.9M | 7.21% |
| 3 | AMPHENOL CORP NEW | 032095101 | 928,678 | $125.5M | 5.45% |
| 4 | TELEDYNE TECHNOLOGIES INC | TDY | 236,474 | $120.8M | 5.25% |
| 5 | AMETEK INC | AME | 451,704 | $92.7M | 4.03% |
| 6 | SPX TECHNOLOGIES INC | SPXC | 461,624 | $92.4M | 4.01% |
| 7 | RLI CORP | RLI | 1,405,163 | $89.9M | 3.91% |
| 8 | OREILLY AUTOMOTIVE INC | 67103H107 | 975,177 | $88.9M | 3.87% |
| 9 | PARKER-HANNIFIN CORP | PH | 88,750 | $78.0M | 3.39% |
| 10 | LINDE PLC | LIN | 176,745 | $75.4M | 3.27% |
| 11 | GRACO INC | GGG | 867,057 | $71.1M | 3.09% |
| 12 | WATTS WATER TECHNOLOGIES INC | WTS | 257,271 | $71.0M | 3.09% |
| 13 | SIMPSON MFG INC | 829073105 | 408,705 | $66.0M | 2.87% |
| 14 | MASTERCARD INCORPORATED | MA | 110,904 | $63.3M | 2.75% |
| 15 | INTERCONTINENTAL EXCHANGE INC | 45866F104 | 381,331 | $61.8M | 2.68% |
| 16 | PROGRESSIVE CORP | 743315103 | 267,040 | $60.8M | 2.64% |
| 17 | COPART INC | CPRT | 1,445,358 | $56.6M | 2.46% |
| 18 | ARCH CAP GROUP LTD | G0450A105 | 572,792 | $54.9M | 2.39% |
| 19 | CACI INTL INC | 127190304 | 102,392 | $54.6M | 2.37% |
| 20 | UL SOLUTIONS INC | ULS | 581,550 | $45.9M | 1.99% |