SanDisk, the memory-chip maker behind the card in your camera, is $1,885 a share, up 585% this year and seventeen-fold in twelve months, on $16.5 billion traded today. The CEO sold 33,841 shares last night. Dave, on his board in SoHo, has a tip and a warning.

Tuesday 22 September, 12:32 ET: SanDisk (SNDK) +6.7% at $1,885 on $16.5 billion of dollar volume, the largest on the tape's movers board. Daily closes on the tape: $1,766.64 yesterday, +585% since 1 January, +1,732% over twelve months, 52-week range $93.54 to $2,354.39, so still 20% below the high. News on the tape: 'Sandisk stock has surged over 650% since the start of 2026 but is down 24% from its 52-week high' (21 Sept); an analyst piece projecting the low $2,000s by 2030, a below-market return from here (22 Sept); and the live-news lane at 00:30 UTC: 'Insider Selling: Sandisk CEO Sells 33,841 Shares'. The reason for the run is the AI build-out: data centres need memory, and SanDisk makes it (see Jon's story from last night on the $760 billion of capex behind it).

in plain EnglishSanDisk makes the memory chips and cards that store data, and AI data centres need enormous amounts of memory, so its shares have gone up seventeen times in a year. Dave's hot tip is the stock everyone can see; his warning is the part people skip: the company's own boss sold shares last night, and the price is still a fifth below its peak. Not advice. A tip with a footnote, from a man on a skateboard.

Reported Tuesday 22 September 2026 · every number dated to its source, latest 22 September 2026

1 · evidence every number, with its source and its date

$1,885 · +6.7% · $16.5 billion traded by 12:32 ET, the most on the movers board

SanDisk (SNDK), today

live movers feed on the AirPort tape (Massive, 15-min delayed) · 2026-09-22

+585% this year · +1,732% in twelve months · 52-week range $93.54 to $2,354.39 · still 20% below the high

The run

daily closes on the tape to 21 Sept + today's print · 2026-09-22

"Insider Selling: Sandisk CEO Sells 33,841 Shares"

The footnote

live-news lane on the tape · The Markets Daily, 22 Sept 00:30 UTC · 2026-09-22

"surged over 650% since the start of 2026 but is down 24% from its 52-week high" · an analyst sees the low $2,000s by 2030, a below-market return from here

On the record this week

news on the tape, 21–22 Sept · 2026-09-22

AI data centres need memory; the four hyperscalers are spending $760 billion on AI infrastructure this year

Why

news on the tape, 12 Sept (see bp-2026-09-21-infrastructure) · 2026-09-12

2 · relations who this touches

SanDisk AI infrastructure

3 · history · 4 · analogues · 5 · ask Pro

AirPort has been watching this since before it was news. The trail, the last times this shape happened, and Ask, scoped to this story.GO DEEPER

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