Goodlander Investment Management, LLC holds a concentrated book of 12 stocks worth $289.1M as of Q1 2026 (disclosed May 18, 2026, a ~48-day 13F lag). This quarter they opened Forgent Power Solutions Inc and trimmed Mastec Inc. Their largest long position is Mastec Inc at 16% of the equity book. Cloning the disclosed picks since 2025 would be +113% (+65.8%/yr). That is a simulation of the disclosed long book, not audited returns.
The reported book (valued from quarter-end) returned +129.7%, a 17.1-point gap that is the cost of the ~48-day 13F disclosure lag a real follower can't avoid.
Growth of $10,000 cloning Goodlander Investment Management, LLC's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~48 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
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 Goodlander Investment Management, LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| JPMORGAN CHASE & CO | 19 / 12 | $8.1B |
| UBS Group AG | 19 / 12 | $3.6B |
| ROYAL BANK OF CANADA | 19 / 12 | $2.0B |
| MORGAN STANLEY | 18 / 12 | $9.2B |
| WELLS FARGO & COMPANY/MN | 18 / 12 | $1.5B |
| CITIGROUP INC | 18 / 12 | $1.4B |
| BARCLAYS PLC | 18 / 12 | $1.4B |
| Ken Griffin | 18 / 12 | $1.3B |
Ranked by how many of Goodlander Investment Management, LLC's top 12 disclosed names each fund also holds: a cross-fund conviction signal from the latest 13F of every tracked manager.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Mastec Inc COM | $46.7M | 145.0K | 16.1% | ▼−15% Reduced · −25K sh | |
| 2 | Forgent Power Solutions Inc COM SHS CL A | $40.4M | 1.38M | 14.0% | ▲New New position | |
| 3 | Core Scientific Inc New COM | $33.7M | 2.25M | 11.6% | ▲+181% Added · +1.4M sh | |
| 4 | MP Materials Corp COM CL A | $32.3M | 670.0K | 11.2% | ▲New New position | |
| 5 | Centuri Holdings Inc COM SHS | $31.8M | 1.09M | 11.0% | ▲+98% Added · +540K sh | |
| 6 | BP PLC SPONSORED ADR | $27.3M | 579.9K | 9.4% | ▲New New position | |
| 7 | Darling Ingredients Inc COM | $24.7M | 400.0K | 8.6% | ▲New New position | |
| 8 | Legence Corp CL A | $24.3M | 430.0K | 8.4% | ▲New New position | |
| 9 | Comfort Sys USA Inc COM | $16.5M | 12.0K | 5.7% | ▲New New position | |
| 10 | Green Plains Inc COM | $6.1M | 370.0K | 2.1% | ▼−73% Reduced · −990K sh | |
| 11 | American Exceptionalism Acqu ORD CL A | $4.4M | 409.5K | 1.5% | ▲New New position | |
| 12 | Schmid Group N.V. EURO SHS CL A | $863K | 162.8K | 0.3% | ▲New New position |
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/2018973/holdings"
Use Arkolith to show Goodlander Investment Management, LLC'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 18, 2026 | 12 | $289.1M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 17, 2026 | 11 | $261.8M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 14, 2025 | 11 | $262.3M | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 14, 2025 | 11 | $243.6M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 15, 2025 | 10 | $117.2M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 14, 2025 | 10 | $135.9M | 13F-HR |
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. The performance line is a simulation of the disclosed long book, not an audited return.