Duquesne Family Office LLC: STMICROELECTRONICS N V (STM): Quarterly 13F Position History
As of Q1 2026, Duquesne Family Office LLC reported 2,612,880 shares of STMICROELECTRONICS N V (STM), worth $90.3M and representing 3.1% of its 13F equity book. Quarter-over-quarter share count change: + 1,839,325 (+237.8%) . The position first appeared in Q4 2025 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 2,612,880Shares Held (Latest Filing)
- $90.3MReported Market Value (Latest Filing)
- 3.1%Portfolio Weight (% of 13F Equity Book)
- +1,839,325Quarter-over-Quarter Share Change
- +$70.2MQuarter-over-Quarter Value Change
- 2,612,880Peak Reported Shares (Historical)
Recent initiation: Duquesne Family Office LLC first reported STM on the Q4 2025 filing — fewer than three quarters of history are available.
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 2 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 2,612,880 | +1,839,325 | +237.8% | $90.3M | 3.1% | $34.5 |
| Q4 2025 | 773,555 | — | — | $20.1M | 0.5% | $25.9 |
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, not the manager's cost basis. See the full methodology document for the normalization rules.
When did Duquesne Family Office LLC first disclose a STM position in 13F-HR filings?
Duquesne Family Office LLC first reported STMICROELECTRONICS N V (STM) on its 13F-HR filing for the period ending 2025-12-31 (Q4 2025). The position has appeared on 2 reported quarters within Pactolio's tracked window.
What was Duquesne Family Office LLC's most recent quarter-over-quarter share-count change in STM?
Between Q4 2025 and Q1 2026, Duquesne Family Office LLC added 1,839,325 shares of STM (+237.8%), bringing the total reported position to 2,612,880 shares at a market value of $90.3M.
Does the implied price-per-share represent Duquesne Family Office LLC's cost basis in STM?
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.