Duquesne Family Office LLC: SEAGATE TECHNOLOGY HLDNGS PL (STX): Quarterly 13F Position History
As of Q2 2026, Duquesne Family Office LLC reported 122,000 shares of SEAGATE TECHNOLOGY HLDNGS PL (STX), worth $117.7M and representing 2.7% of its 13F equity book. Quarter-over-quarter share count change: + 71,300 (+140.6%) . The position first appeared in Q3 2023 and has been disclosed across 12 13F-HR filings in Pactolio's tracked window.
- 122,000Shares Held (Latest Filing)
- $117.7MReported Market Value (Latest Filing)
- 2.7%Portfolio Weight (% of 13F Equity Book)
- +71,300Quarter-over-Quarter Share Change
- +$97.9MQuarter-over-Quarter Value Change
- 2,116,108Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 12 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q2 2026 | 122,000 | +71,300 | +140.6% | $117.7M | 2.7% | $965.0 |
| Q1 2026 | 50,700 | +50,700 | – | $19.9M | 0.7% | $391.8 |
| Q4 2025 | 0 | 85,900 | -100.0% | $0 | 0.0% | – |
| Q3 2025 | 85,900 | 111,590 | -56.5% | $20.3M | 0.5% | $236.1 |
| Q2 2025 | 197,490 | 21,987 | -10.0% | $28.5M | 0.7% | $144.3 |
| Q1 2025 | 219,477 | 1,344,599 | -86.0% | $18.6M | 0.6% | $85.0 |
| Q4 2024 | 1,564,076 | 76,293 | -4.7% | $135.0M | 3.8% | $86.3 |
| Q3 2024 | 1,640,369 | 114,909 | -6.5% | $179.7M | 6.3% | $109.5 |
| Q2 2024 | 1,755,278 | +316,295 | +22.0% | $181.3M | 6.4% | $103.3 |
| Q1 2024 | 1,438,983 | 677,125 | -32.0% | $133.9M | 3.6% | $93.0 |
| Q4 2023 | 2,116,108 | +1,201,065 | +131.3% | $180.7M | 5.8% | $85.4 |
| Q3 2023 | 915,043 | – | – | $60.3M | 2.2% | $65.9 |
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 Duquesne Family Office LLC first disclose a STX position in 13F-HR filings?
Duquesne Family Office LLC first reported SEAGATE TECHNOLOGY HLDNGS PL (STX) on its 13F-HR filing for the period ending 2023-09-30 (Q3 2023). The position has appeared on 12 reported quarters within Pactolio's tracked window.
What was Duquesne Family Office LLC's most recent quarter-over-quarter share-count change in STX?
Between Q1 2026 and Q2 2026, Duquesne Family Office LLC added 71,300 shares of STX (+140.6%), bringing the total reported position to 122,000 shares at a market value of $117.7M.
Does the implied price-per-share represent Duquesne Family Office LLC'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.