Greenhaven Road Investment Management, L.P. holds a concentrated book of 17 stocks worth $145.4M as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). This quarter they opened Zoom Communications Inc and trimmed Hagerty Inc-A. Their largest long position is Hagerty Inc-A at 17% of the equity book.
Top-heavy: concentrated book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
100% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Other tracked managers holding the same core names as Greenhaven Road Investment Management, L.P.
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| UBS Group AG | 19 / 17 | $1.2B |
| STATE STREET CORP | 18 / 17 | $4.5B |
| GEODE CAPITAL MANAGEMENT, LLC | 18 / 17 | $2.8B |
| GOLDMAN SACHS GROUP INC | 18 / 17 | $1.9B |
| MORGAN STANLEY | 18 / 17 | $1.5B |
| BlackRock, Inc. | 17 / 17 | $8.7B |
| NORTHERN TRUST CORP | 17 / 17 | $999.5M |
| WELLS FARGO & COMPANY/MN | 17 / 17 | $368.9M |
Ranked by the share of each fund's own book sitting in the names it shares with Greenhaven Road Investment Management, L.P.: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Hagerty Inc CL A COM | $25.0M | 2.37M | 17.2% | ▼−9.4% Reduced · −247K sh | |
| 2 | Cellebrite Di Ltd ORDINARY SHARES | $21.2M | 1.54M | 14.6% | ▼−4.0% Reduced · −65K sh | |
| 3 | Kingsway Finl Svcs Inc COM NEW | $19.3M | 1.85M | 13.3% | ▼−1.7% Reduced · −33K sh | |
| 4 | Ast Spacemobile Inc COM CL A | $18.7M | 225.2K | 12.8% | ▼−18% Reduced · −50K sh | |
| 5 | Lifecore Biomedical Inc COM | $13.2M | 3.54M | 9.1% | ▼−3.9% Reduced · −145K sh | |
| 6 | Par Technology Corp COM | $10.8M | 810.4K | 7.4% | ▼−8.6% Reduced · −76K sh | |
| 7 | KKR & Co Inc COM | $9.9M | 106.6K | 6.8% | ▼−44% Reduced · −84K sh | |
| 8 | Burford Capital Limited ORD SHS | $9.7M | 2.14M | 6.7% | ▲+15% Added · +275K sh | |
| 9 | Allot Ltd SHS | $8.4M | 1.27M | 5.8% | ▲+48% Added · +410K sh | |
| 10 | Nextnav Inc COMMON STOCK | $5.6M | 349.3K | 3.8% | ▲+463% Added · +287K sh | |
| 11 | Zoom Communications Inc CL A | $2.0M | 25.0K | 1.4% | ▲New New position | |
| 12 | Merlin Inc COM | $796K | 108.2K | 0.5% | ▲New New position | |
| 13 | Listed FDS TR HORIZON KINETICS | $529K | 16.0K | 0.4% | ▲New New position | |
| 14 | Matrix SVC Co COM | $160K | 14.0K | 0.1% | —Held | |
| 15 | Perma-Fix Environmental Svcs COM NEW | $120K | 11.3K | 0.1% | ▲New New position | |
| 16 | Research Solutions Inc COM | $87K | 38.5K | 0.1% | —Held | |
| 17 | Quest Resource Hldg Corp COM NEW | $37K | 31.5K | 0.0% | —Held |
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1741129/holdings"
Use Arkolith to show Greenhaven Road Investment Management, L.P.'s latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 15, 2026 | 17 | $145.4M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 13, 2026 | 16 | $594.0M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Dec 1, 2025 | 17 | $677.6M | 13F-HR/A |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.