# McDonald Partners LLC 13F holdings

> Latest reported SEC 13F equity book. Teaser: top 10 of 208 long-equity positions.
> CIK 1331074. Latest filing Q1 2026, as of quarter end 2026-03-31. Long-equity book $424.0M.

## Top holdings (teaser)

| # | Ticker | Issuer | Value | % of book | Change |
|---|--------|--------|-------|-----------|--------|
| 1 | AAPL | Apple Inc | $15.3M | 3.6% | Added |
| 2 | MSFT | Microsoft Corp | $13.5M | 3.2% | Added |
| 3 | n/a | Eaton Corp PLC | $13.5M | 3.2% | Added |
| 4 | n/a | JPMorgan Chase & Co | $12.2M | 2.9% | Added |
| 5 | n/a | Lumentum Hldgs Inc | $11.7M | 2.8% | Reduced |
| 6 | n/a | Vanguard Index FDS | $10.3M | 2.4% | Added |
| 7 | n/a | Abbvie Inc | $8.8M | 2.1% | Added |
| 8 | BRK/B | Berkshire Hathaway Inc Del | $8.6M | 2.0% | Reduced |
| 9 | n/a | Phillips 66 | $8.2M | 1.9% | Added |
| 10 | n/a | Exxon Mobil Corp | $7.8M | 1.8% | Added |

## Latest moves

Bought: Textron Inc, Yum Brands Inc, Rockwell Automation Inc
Sold: Lumentum Hldgs Inc, BRK/B, RTX Corporation

Counts and totals reflect the 13F filers and securities Arkolith tracks, not the entire institutional universe. Option legs are excluded from the book above.

## Full data via the API and MCP

This page is a teaser. The complete book, full quarter-over-quarter history, and per-datapoint
provenance are available through the metered REST API and MCP server.

- Endpoint: https://arkolith.com/api/mcp (transport: streamable-http)
- Auth: Bearer API key. Mint one and copy a ready-to-paste command at https://arkolith.com/connect
- Claude Code: `claude mcp add --transport http arkolith https://arkolith.com/api/mcp --header "Authorization: Bearer YOUR_API_KEY"`
- Discovery: `tools/list` is free; `tools/call` is metered by credits.

### Machine-readable
- Tool catalog JSON: https://arkolith.com/api/mcp/catalog
- MCP descriptor: https://arkolith.com/.well-known/mcp.json
- OpenAPI 3.1 REST spec: https://arkolith.com/openapi.json
- Full LLM guide: https://arkolith.com/llms-full.txt
- Human docs: https://arkolith.com/docs

## Source and method

- Source: SEC EDGAR 13F-HR (public domain). Long-equity positions only (option legs excluded). Filed quarterly, about a 45-day lag.
- Primary source: https://www.sec.gov/Archives/edgar/data/1331074/000117266126002252/xslForm13F_X02/primary_doc.xml
- Human page: https://arkolith.com/fund/mcdonald-partners-llc-1331074
- Per-datapoint lineage: call the `provenance.get` MCP tool for the source URL and fetch history behind any figure.

Paid product with a one-time evaluation grant at signup (no card to evaluate). Most calls cost 1 credit (~$0.01); heavier point-in-time / cross-source tools cost more.

_Latest disclosed public filings. Data, not investment advice._