ALTAROCK PARTNERS LP — Quarter-over-Quarter 13F Allocation Shifts Q1 2026
In Q1 2026, ALTAROCK PARTNERS LP increased allocation to 2 existing positions, and trimmed 6 positions. The fund's 13F equity book declined from $5.10B to $4.13B (-19.1% QoQ) . All deltas are sourced from sequential SEC Form 13F-HR filings; share-count changes reflect explicit trading activity, while weight changes can also include price movement. This page lists every position change reported — the portfolio overview shows a summary of the top shifts.
Net Portfolio Value Change
- $5.10BPrior quarter
- $4.13BCurrent quarter
- $-0.97BNet delta
- -19.1%% change
Largest Allocation Increases Q1 2026
Largest portfolio-weight increases in existing positions. Share-count delta is shown separately so price-only re-weighting can be distinguished from active adds.
| Company | Ticker | Δ Weight | Δ Shares | History |
|---|---|---|---|---|
| MOODYS CORP | MCO | +0.96% | +5.84% | History → |
| AMAZON COM INC | AMZN | +5.09% | +3.46% | History → |
Largest Allocation Reductions Q1 2026
Largest portfolio-weight decreases in existing positions (positions kept open at a lower allocation).
| Company | Ticker | Δ Weight | Δ Shares | History |
|---|---|---|---|---|
| HILTON WORLDWIDE HOLDINGS INC | HLT | -2.94% | -97.17% | History → |
| ALPHABET INC | GOOGL | -0.74% | -74.38% | History → |
| MICROSOFT CORP | MSFT | -2.99% | -10.32% | History → |
| TRANSDIGM GROUP INC | TDG | 0.26% | -6.21% | History → |
| MASTERCARD INCORPORATED | MA | 0.27% | -3.51% | History → |
| VISA INC | V | 0.10% | -3.48% | History → |
Methodology & FAQ
How ALTAROCK PARTNERS LP Quarterly Changes Are Computed
Each row above is computed by joining the most recent 13F-HR filing for ALTAROCK PARTNERS LP against the immediately preceding quarterly filing for the same fund. Portfolio weights are normalized to exclude listed options for comparability. A complete description of the methodology — including how confidential treatment filings are handled and why share count rather than weight is the cleaner trading signal — is documented in the Methodology.
Which positions did ALTAROCK PARTNERS LP initiate in Q1 2026?
ALTAROCK PARTNERS LP established no new positions in Q1 2026.
Which existing positions saw the largest allocation increases for ALTAROCK PARTNERS LP in Q1 2026?
The largest portfolio-weight increases in existing positions were: MOODYS CORP (MCO, +0.96% weight, +5.84% shares), AMAZON COM INC (AMZN, +5.09% weight, +3.46% shares).
Which positions did ALTAROCK PARTNERS LP fully exit in Q1 2026?
ALTAROCK PARTNERS LP fully exited no positions in Q1 2026.
Which existing positions saw the largest allocation reductions for ALTAROCK PARTNERS LP in Q1 2026?
The largest portfolio-weight reductions in positions kept open were: HILTON WORLDWIDE HOLDINGS INC (HLT, -2.94% weight, -97.17% shares), ALPHABET INC (GOOGL, -0.74% weight, -74.38% shares), MICROSOFT CORP (MSFT, -2.99% weight, -10.32% shares), TRANSDIGM GROUP INC (TDG, 0.26% weight, -6.21% shares), MASTERCARD INCORPORATED (MA, 0.27% weight, -3.51% shares), VISA INC (V, 0.10% weight, -3.48% shares).
Do quarter-over-quarter 13F allocation changes constitute explicit trading signals?
No. Quarter-over-quarter changes reflect a combination of active trading and market price movement. A weight increase can result from price appreciation alone, without the manager adding shares. Share-count delta is the cleaner indicator of explicit trading activity.