RE: 22p large buy at 17:07?3 Mar 2026 18:54
After-hours large trades on the London Stock Exchange (LSE) occur outside the main 08:00-16:30 GMT session, often in the form of dark pool or broker-facilitated OTC deals to minimize market impact.
A large trade executed at 10:00 AM but reported after 5:00 PM is almost certainly a "late print" (or "busted trade" correction) occurring in a dark pool or over-the-counter (OTC) venue.
Here is why this happens:
Private/Dark Pool Trading: Large institutional investors often use private venues (dark pools) to trade huge volumes without impacting the public price instantly.
Regulatory Reporting Rules: While the trade may have been agreed upon at 10:00 AM, FINRA rules allow certain types of private transactions to be reported to the consolidated tape later in the day, sometimes well after the 4:00 PM close.
"As-Of" Trades: These are often flagged as "as-of" trades, meaning they are recorded at the end of the day but attributed to the time they were actually negotiated.
Correction of Errors: If a trade was initially reported incorrectly at 10:00 AM, it may be fixed ("busted" or corrected) later in the day, appearing as a new large print after 5:00 PM.
This situation is common in institutional trading, where large, private, off-exchange transactions are negotiated throughout the day but reported in bulk after the market closes.