Altimeter Capital Management, LP: TAIWAN SEMIC-ADR (TSM): Quarterly 13F Position History
As of Q1 2026, Altimeter Capital Management, LP reported 1,365,675 shares of TAIWAN SEMIC-ADR (TSM), worth $461.5M and representing 8.1% of its 13F equity book. Quarter-over-quarter share count change: + 146,448 (+12.0%) . The position first appeared in Q3 2024 and has been disclosed across 7 13F-HR filings in Pactolio's tracked window.
- 1,365,675Shares Held (Latest Filing)
- $461.5MReported Market Value (Latest Filing)
- 8.1%Portfolio Weight (% of 13F Equity Book)
- +146,448Quarter-over-Quarter Share Change
- +$91.0MQuarter-over-Quarter Value Change
- 1,365,675Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 7 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,365,675 | +146,448 | +12.0% | $461.5M | 8.1% | $337.9 |
| Q4 2025 | 1,219,227 | +150,550 | +14.1% | $370.5M | 5.6% | $303.9 |
| Q3 2025 | 1,068,677 | +201,468 | +23.2% | $298.5M | 3.9% | $279.3 |
| Q2 2025 | 867,209 | +867,209 | — | $196.4M | 2.8% | $226.5 |
| Q1 2025 | 0 | 504,380 | -100.0% | $0 | 0.0% | — |
| Q4 2024 | 504,380 | 14,910 | -2.9% | $99.6M | 1.8% | $197.5 |
| Q3 2024 | 519,290 | — | — | $90.2M | 1.3% | $173.7 |
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 TSM position in 13F-HR filings?
Altimeter Capital Management, LP first reported TAIWAN SEMIC-ADR (TSM) on its 13F-HR filing for the period ending 2024-09-30 (Q3 2024). The position has appeared on 7 reported quarters within Pactolio's tracked window.
What was Altimeter Capital Management, LP's most recent quarter-over-quarter share-count change in TSM?
Between Q4 2025 and Q1 2026, Altimeter Capital Management, LP added 146,448 shares of TSM (+12.0%), bringing the total reported position to 1,365,675 shares at a market value of $461.5M.
Does the implied price-per-share represent Altimeter Capital Management, LP's cost basis in TSM?
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.