ALTAROCK PARTNERS LP: AMAZON.COM (AMZN): Quarterly 13F Position History
As of Q1 2026, ALTAROCK PARTNERS LP reported 7,567,946 shares of AMAZON.COM (AMZN), worth $1.6B and representing 38.2% of its 13F equity book. Quarter-over-quarter share count change: + 253,412 (+3.5%) . The position first appeared in Q1 2022 and has been disclosed across 17 13F-HR filings in Pactolio's tracked window.
- 7,567,946Shares Held (Latest Filing)
- $1.6BReported Market Value (Latest Filing)
- 38.2%Portfolio Weight (% of 13F Equity Book)
- +253,412Quarter-over-Quarter Share Change
- -$112.2MQuarter-over-Quarter Value Change
- 7,567,946Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 17 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 7,567,946 | +253,412 | +3.5% | $1.6B | 38.2% | $208.3 |
| Q4 2025 | 7,314,534 | 243,719 | -3.2% | $1.7B | 33.1% | $230.8 |
| Q3 2025 | 7,558,253 | +1,282,347 | +20.4% | $1.7B | 30.3% | $219.6 |
| Q2 2025 | 6,275,906 | +1,073,491 | +20.6% | $1.4B | 25.1% | $219.4 |
| Q1 2025 | 5,202,415 | 75,905 | -1.4% | $989.8M | 19.9% | $190.3 |
| Q4 2024 | 5,278,320 | 124,000 | -2.3% | $1.2B | 23.4% | $219.4 |
| Q3 2024 | 5,402,320 | +1,272,860 | +30.8% | $1.0B | 19.8% | $186.3 |
| Q2 2024 | 4,129,460 | 75,000 | -1.8% | $798.0M | 16.4% | $193.3 |
| Q1 2024 | 4,204,460 | 230,174 | -5.2% | $758.4M | 16.3% | $180.4 |
| Q4 2023 | 4,434,634 | 165,600 | -3.6% | $673.8M | 15.0% | $151.9 |
| Q3 2023 | 4,600,234 | 506,547 | -9.9% | $584.8M | 14.6% | $127.1 |
| Q2 2023 | 5,106,781 | 758,170 | -12.9% | $665.7M | 16.0% | $130.4 |
| Q1 2023 | 5,864,951 | +220,581 | +3.9% | $605.8M | 16.6% | $103.3 |
| Q4 2022 | 5,644,370 | +2,350,336 | +71.4% | $474.1M | 14.9% | $84.0 |
| Q3 2022 | 3,294,034 | +229,614 | +7.5% | $372.2M | 12.2% | $113.0 |
| Q2 2022 | 3,064,420 | +2,937,174 | +2308.3% | $325.5M | 10.0% | $106.2 |
| Q1 2022 | 127,246 | — | — | $414.8M | 10.6% | $3260.0 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did ALTAROCK PARTNERS LP first disclose a AMZN position in 13F-HR filings?
ALTAROCK PARTNERS LP first reported AMAZON.COM (AMZN) on its 13F-HR filing for the period ending 2022-03-31 (Q1 2022). The position has appeared on 17 reported quarters within Pactolio's tracked window.
What was ALTAROCK PARTNERS LP's most recent quarter-over-quarter share-count change in AMZN?
Between Q4 2025 and Q1 2026, ALTAROCK PARTNERS LP added 253,412 shares of AMZN (+3.5%), bringing the total reported position to 7,567,946 shares at a market value of $1.6B.
Does the implied price-per-share represent ALTAROCK PARTNERS LP's cost basis in AMZN?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.