Altarock Partners LP holds a concentrated book of 8 stocks worth $4.2B as of Q2 2026 (disclosed Aug 17, 2026, a ~48-day 13F lag). This quarter they trimmed Amazon.com Inc. Their largest long position is Amazon.com Inc at 32% 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 (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Altarock Partners LP
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| Blacksheep Fund Management Ltd | 4 / 8 | $252.3M |
| Hengistbury Investment Partners LLP | 2 / 8 | $169.6M |
| Skye Global Management LP | 7 / 8 | $3.5B |
| Bluegrass Capital Partners LP | 5 / 8 | $105.2M |
| Luma Capital S.A. - SPF | 5 / 8 | $63.9M |
| Hingham Institution for Savings | 4 / 8 | $72.4M |
| Advaya LLP | 2 / 8 | $76.4M |
| MFF Capital Investments Ltd | 5 / 8 | $773.8M |
Ranked by the share of each fund's own book sitting in the names it shares with Altarock Partners LP: 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 | Amazon.com Inc COMM | $1.4B | 5.73M | 32.2% | ▼−24% Reduced · −1.8M sh | |
| 2 | Transdigm Group Inc COMM | $1.2B | 875.8K | 27.5% | ▼−3.7% Reduced · −33K sh | |
| 3 | Microsoft Corp COMM | $870.8M | 2.33M | 20.5% | ▲+25% Added · +467K sh | |
| 4 | Mastercard Inc-Class A COMM | $392.7M | 764.5K | 9.3% | ▲+46% Added · +242K sh | |
| 5 | Visa Inc-Class A SHRS COMM | $287.0M | 836.5K | 6.8% | ▲+68% Added · +338K sh | |
| 6 | Moodys Corp COMM | $137.1M | 302.6K | 3.2% | ▼−65% Reduced · −559K sh | |
| 7 | Alphabet Inc-CL A COMM | $15.0M | 42.0K | 0.4% | ▼−3.2% Reduced · −1K sh | |
| 8 | Hilton Worldwide COMM | $5.0M | 15.2K | 0.1% | ▼−0.9% Reduced · −139 sh |
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/1631014/holdings"
Use Arkolith to show ALTAROCK PARTNERS LP'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 |
|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Aug 17, 2026 | 8 | $4.2B | 13F-HR |
| Q1 2026 | Mar 31, 2026 | May 15, 2026 | 8 | $4.1B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 13, 2026 | 8 | $5.1B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 14, 2025 | 9 | $5.5B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 14, 2025 | 9 | $5.5B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 14, 2025 | 9 | $5.0B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 14, 2025 | 10 | $4.9B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 13, 2024 | 9 | $5.1B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 14, 2024 | 9 | $4.9B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 21, 2024 | 8 | $4.7B | 13F-HR/A |
| Q4 2023 | Dec 31, 2023 | Feb 15, 2024 | 8 | $4.5B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Nov 14, 2023 | 8 | $4.0B | 13F-HR |
| Q2 2023 | Jun 30, 2023 | Aug 14, 2023 | 8 | $4.2B | 13F-HR |
| Q1 2023 | Mar 31, 2023 | May 16, 2023 | 8 | $3.7B | 13F-HR |
| Q4 2022 | Dec 31, 2022 | Feb 13, 2023 | 8 | $3.2B | 13F-HR |
| Q3 2022 | Sep 30, 2022 | Nov 14, 2022 | 8 | $3.1B | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Aug 12, 2022 | 8 | $3.2B | 13F-HR |
| Q1 2022 | Mar 31, 2022 | May 13, 2022 | 9 | $3.9B | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Feb 14, 2022 | 8 | $3.8B | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Nov 15, 2021 | 8 | $3.7B | 13F-HR |
| Q2 2021 | Jun 30, 2021 | Aug 13, 2021 | 8 | $3.6B | 13F-HR |
| Q1 2021 | Mar 31, 2021 | May 14, 2021 | 7 | $2.6B | 13F-HR |
| Q4 2020 | Dec 31, 2020 | Feb 16, 2021 | 7 | $2.4B | 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. Price-derived performance is withheld until the price-source policy and freshness gate are green.