Sachem Head Capital Management LP: SEAGATE TECHNOLOGY HLDNGS PL (STX): Quarterly 13F Position History
As of Q2 2026, Sachem Head Capital Management LP reported 472,000 shares of SEAGATE TECHNOLOGY HLDNGS PL (STX), worth $455.5M and representing 9.5% of its 13F equity book. Quarter-over-quarter share count change: + 472,000 (re-initiated) . The position first appeared in Q4 2023 and has been disclosed across 11 13F-HR filings in Pactolio's tracked window.
- 472,000Shares Held (Latest Filing)
- $455.5MReported Market Value (Latest Filing)
- 9.5%Portfolio Weight (% of 13F Equity Book)
- +472,000Quarter-over-Quarter Share Change
- +$455.5MQuarter-over-Quarter Value Change
- 1,522,500Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 11 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q2 2026 | 472,000 | +472,000 | – | $455.5M | 9.5% | $965.0 |
| Q1 2026 | 0 | 0 | – | $0 | 0.0% | – |
| Q4 2025 | 0 | 0 | – | $0 | 0.0% | – |
| Q3 2025 | 0 | 1,522,500 | -100.0% | $0 | 0.0% | – |
| Q2 2025 | 1,522,500 | +32,500 | +2.2% | $219.7M | 6.9% | $144.3 |
| Q1 2025 | 1,490,000 | +1,490,000 | – | $126.6M | 5.1% | $85.0 |
| Q4 2024 | 0 | 0 | – | $0 | 0.0% | – |
| Q3 2024 | 0 | 1,012,300 | -100.0% | $0 | 0.0% | – |
| Q2 2024 | 1,012,300 | +147,300 | +17.0% | $104.5M | 5.2% | $103.3 |
| Q1 2024 | 865,000 | 0 | – | $80.5M | 3.7% | $93.0 |
| Q4 2023 | 865,000 | – | – | $73.8M | 3.7% | $85.4 |
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 rather than the manager's cost basis. See the full methodology document for the normalization rules.
When did Sachem Head Capital Management LP first disclose a STX position in 13F-HR filings?
Sachem Head Capital Management LP first reported SEAGATE TECHNOLOGY HLDNGS PL (STX) on its 13F-HR filing for the period ending 2023-12-31 (Q4 2023). The position has appeared on 11 reported quarters within Pactolio's tracked window.
What was Sachem Head Capital Management LP's most recent quarter-over-quarter share-count change in STX?
Between Q1 2026 and Q2 2026, Sachem Head Capital Management LP added 472,000 shares of STX (re-initiated), bringing the total reported position to 472,000 shares at a market value of $455.5M.
Does the implied price-per-share represent Sachem Head Capital Management LP's cost basis in STX?
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.