Altimeter Capital Management, LP: MICROSOFT (MSFT): Quarterly 13F Position History
As of Q1 2026, Altimeter Capital Management, LP reported 1,183,632 shares of MICROSOFT (MSFT), worth $438.1M and representing 7.7% of its 13F equity book. Quarter-over-quarter share count change: 93,720 (-7.3%) . The position first appeared in Q1 2018 and has been disclosed across 33 13F-HR filings in Pactolio's tracked window.
- 1,183,632Shares Held (Latest Filing)
- $438.1MReported Market Value (Latest Filing)
- 7.7%Portfolio Weight (% of 13F Equity Book)
- 93,720Quarter-over-Quarter Share Change
- -$179.6MQuarter-over-Quarter Value Change
- 1,763,135Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 33 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,183,632 | 93,720 | -7.3% | $438.1M | 7.7% | $370.2 |
| Q4 2025 | 1,277,352 | +115,260 | +9.9% | $617.8M | 9.3% | $483.6 |
| Q3 2025 | 1,162,092 | +103,971 | +9.8% | $601.9M | 7.9% | $518.0 |
| Q2 2025 | 1,058,121 | +83,041 | +8.5% | $526.3M | 7.6% | $497.4 |
| Q1 2025 | 975,080 | 18,400 | -1.9% | $366.0M | 7.4% | $375.4 |
| Q4 2024 | 993,480 | 592,420 | -37.4% | $418.8M | 7.6% | $421.5 |
| Q3 2024 | 1,585,900 | 39,740 | -2.4% | $682.4M | 10.1% | $430.3 |
| Q2 2024 | 1,625,640 | 24,230 | -1.5% | $726.6M | 10.8% | $446.9 |
| Q1 2024 | 1,649,870 | 3,090 | -0.2% | $694.1M | 10.7% | $420.7 |
| Q4 2023 | 1,652,960 | 0 | — | $621.6M | 10.3% | $376.0 |
| Q3 2023 | 1,652,960 | +119,825 | +7.8% | $521.9M | 9.9% | $315.8 |
| Q2 2023 | 1,533,135 | 0 | — | $522.1M | 9.4% | $340.5 |
| Q1 2023 | 1,533,135 | 0 | — | $442.0M | 9.7% | $288.3 |
| Q4 2022 | 1,533,135 | 0 | — | $367.7M | 10.1% | $239.8 |
| Q3 2022 | 1,533,135 | 230,000 | -13.0% | $357.1M | 7.6% | $232.9 |
| Q2 2022 | 1,763,135 | 0 | — | $452.8M | 10.3% | $256.8 |
| Q1 2022 | 1,763,135 | 0 | — | $543.6M | 7.0% | $308.3 |
| Q4 2021 | 1,763,135 | 0 | — | $593.0M | 5.6% | $336.3 |
| Q3 2021 | 1,763,135 | 0 | — | $497.1M | 4.0% | $281.9 |
| Q2 2021 | 1,763,135 | 0 | — | $477.6M | 3.6% | $270.9 |
| Q1 2021 | 1,763,135 | +225,000 | +14.6% | $415.7M | 3.0% | $235.8 |
| Q4 2020 | 1,538,135 | +223,000 | +17.0% | $342.1M | 3.2% | $222.4 |
| Q3 2020 | 1,315,135 | +218,000 | +19.9% | $276.6M | 4.7% | $210.3 |
| Q2 2020 | 1,097,135 | +572,135 | +109.0% | $223.3M | 4.7% | $203.5 |
| Q1 2020 | 525,000 | 0 | — | $82.8M | 2.5% | $157.7 |
| Q4 2019 | 525,000 | 0 | — | $82.8M | 1.9% | $157.7 |
| Q3 2019 | 525,000 | +25,000 | +5.0% | $73.0M | 1.8% | $139.0 |
| Q2 2019 | 500,000 | 0 | — | $67.0M | 1.8% | $134.0 |
| Q1 2019 | 500,000 | +140,000 | +38.9% | $59.0M | 2.0% | $117.9 |
| Q4 2018 | 360,000 | +59,800 | +19.9% | $36.6M | 1.3% | $101.6 |
| Q3 2018 | 300,200 | +25,200 | +9.2% | $34.3M | 1.3% | $114.4 |
| Q2 2018 | 275,000 | +15,000 | +5.8% | $27.1M | 1.3% | $98.6 |
| Q1 2018 | 260,000 | — | — | $23.7M | 1.2% | $91.3 |
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 Altimeter Capital Management, LP first disclose a MSFT position in 13F-HR filings?
Altimeter Capital Management, LP first reported MICROSOFT (MSFT) on its 13F-HR filing for the period ending 2018-03-31 (Q1 2018). The position has appeared on 33 reported quarters within Pactolio's tracked window.
What was Altimeter Capital Management, LP's most recent quarter-over-quarter share-count change in MSFT?
Between Q4 2025 and Q1 2026, Altimeter Capital Management, LP reduced its MSFT position by 93,720 shares (-7.3%), leaving 1,183,632 shares at a market value of $438.1M.
Does the implied price-per-share represent Altimeter Capital Management, LP's cost basis in MSFT?
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.