Strategy's 8-K of 28 September reports 847,666 BTC as of 27 September, with 1,665 bought that week; its 8-K of 21 September reported 950 bought and 846,000 held as of 20 September. The row had stood at 845,050 as of 30 August, and the selected total moves from 1,041,371 to 1,043,987 BTC. The filings state whole bitcoin and do not reconcile to the unit: the two purchases sum to 2,615 BTC while the filed aggregates differ by 2,616, and the ledger records the difference between the aggregates.
Data Desk