According to @saylor, Strategy acquired 525 BTC for approximately $60.2 million at about $114,562 per BTC and reports a 25.9% BTC Yield year-to-date in 2025, indicating continued corporate accumulation of BTC (source: @saylor on X, 2025-09-15 https://twitter.com/saylor/status/1967559553090003246; source: Strategy press link https://www.strategy.com/press/strategy-acquires-525-btc-and-now-holds-638985-btc_09-15-2025). As of 2025-09-14, Strategy holds 638,985 BTC acquired for roughly $47.23 billion at an average cost of about $73,913 per BTC, providing a clear reference cost basis for treasury-linked BTC exposure (source: @saylor on X, 2025-09-15 https://twitter.com/saylor/status/1967559553090003246; source: Strategy press link https://www.strategy.com/press/strategy-acquires-525-btc-and-now-holds-638985-btc_09-15-2025). Using the disclosed acquisition price of $114,562 as a reference, the implied mark-to-price value of the total 638,985 BTC would be approximately $73.20 billion, with an uplift of about $26.0 billion over the stated $47.23 billion cost basis, based on calculations from the figures provided (source: figures from @saylor on X, 2025-09-15 https://twitter.com/saylor/status/1967559553090003246). The new purchase price is about 55% above the average cost basis of $73,913, and the 525 BTC increment increases holdings by roughly 0.08%, which may be used by traders as a corporate accumulation benchmark level and scale context for flow analysis (source: figures from @saylor on X, 2025-09-15 https://twitter.com/saylor/status/1967559553090003246). The post also tags tickers $MSTR, $STRC, $STRK, $STRF, and $STRD, highlighting instruments equity and token traders might monitor alongside BTC spot moves (source: @saylor on X, 2025-09-15 https://twitter.com/saylor/status/1967559553090003246).