SanDisk

SanDisk (NASDAQ: SNDK) makes NAND flash — not the DRAM or HBM that Micron and the Korean makers sell into the AI crunch — and has been an independent stock for eighteen months. Western Digital split into two companies in October 2023 after a planned merger with its Kioxia joint-venture partner collapsed; the flash half re-listed as SanDisk Corp on 2025-02-24, closing its first session at $48.60. The registry lists it second-order, in chips, on the memory-wall and AI-capex trends — the same tier and sector as Micron, selling a different product into the same story.

Situational Awareness LP’s 13F, filed 2026-05-18 for the quarter ended 2026-03-31, reported 1,140,119 SanDisk shares worth $724.36 million — its second-largest long stock position, 18.8% of a $3.86 billion long book, behind only Bloom Energy. The same filing’s $583.7 million Micron line is a Put, not a comparable long bet — its value is the underlying’s notional, and the filing cannot say if it is a bearish bet or a hedge.

SanDisk does not make the memory the AI trade is short of, and it trades as if it does. Across SanDisk’s full trading history — 360 sessions, 2025-02-24 through 2026-07-31 — the Pearson correlation between its daily returns and Micron’s is 0.75. Across the 28 sessions of the Korean memory selloff and reversal alone, 2026-06-22 through 2026-07-31, it rises to 0.92. A 28-session window is short enough that this shows the relationship tightening under stress, not that it changed for good — but the number is real, computed from TEXXR’s own as-traded price data, and it is the most interesting thing in this record.

The setup for that stress: SanDisk priced its spinoff low, bottomed at $29.62 on 2025-04-22, then closed 2025 up more than 560%, the S&P 500’s top performer. It kept running — $41.33 on 2025-08-01 to $470.80 on 2026-01-26, a 1,039% move — which Sherwood News credited to SanDisk’s cost advantage from its Kioxia joint venture, the two companies extending that JV by five years, to 2034, on 2026-02-01 — a structural relationship Micron’s dossier has no equivalent for. Earnings kept beating: Q2 revenue up 61% to $3.03 billion, net income up 672% to $803 million (2026-01-30), then Q3 revenue up 251% to $5.95 billion, net income $3.62 billion (2026-05-01) — though that report flagged a consumer-revenue miss and a shift to “multiyear customer engagements,” the same contracted-demand language Micron was using.

SanDisk closed the second quarter at $2,273.73 (2026-06-30), up 257.9% from $635.34 (2026-03-31) — a figure that hides a violent week. Micron and SanDisk led a selloff on 2026-06-23, each down 13%+, SanDisk closing at $1,963.60; it fell to $1,914.46 the next day, spiked 22.0% to an all-time closing high of $2,335.00 on 2026-06-25, then drifted back to the quarter-end close. The real break came in July: a broad selloff on 2026-07-17 left SNDK down 12.63%, worse than Micron, Western Digital, Seagate or Intel that day, and the close kept falling to $1,015.89 by 2026-07-29 — down 56.5% from the 2026-06-25 high, five weeks earlier.

That low landed inside a densely covered Korean selloff: SK Hynix fell 15%+ on 2026-07-13, its largest-ever single-day decline, days after its own Nasdaq debut; then SK Hynix and Samsung both surged 20%+ in Seoul on 2026-07-31 — the same session SanDisk itself rallied 26.0%, from $1,015.89 to $1,279.96, in US trading on 2026-07-30.

Short interest tracks the same volatility with a lag. FINRA’s 34 settlements (2025-02-28 through 2026-07-15) show shares short peaking at 10,911,306 on 2026-06-15, the series high, then falling 34.0% to 7,197,631 by 2026-06-30 — right as the stock topped — before rising to 7,857,690 by 2026-07-15. Settlements publish roughly eight business days later, so that reading is already three weeks stale: it cannot say whether shorts kept covering into the 2026-07-30 rally or were rebuilding into the next leg down. The 2026-07-31 settlement is not yet published.

37 hyperedges touch SanDisk in TEXXR’s corpus, against Micron’s 323 — a gap about continuity, not scale. The earliest edge is Western Digital’s 2015 acquisition of SanDisk; two more follow by 2019; then nothing until 2025-12-31. The graph’s SanDisk clock tracks its corporate status, not its operations — dark for six years while SanDisk was a subsidiary, not an independent subject.

Once the clock restarts, half the 37 edges are bare financial predicates — a price move, no object, day after day — where Micron’s 2026 edges cluster on capex and policy. The edges that aren’t price are structural: the Kioxia JV extension, and a January 2026 pledge with Micron, Western Digital and Seagate to keep undershooting demand rather than repeat the 2023 glut — the promise the July selloff is the first real test of.

Positioning: how much of SNDK is sold short, on the record brokers file twice a month. It lags by design — read it as where the crowd stood, not where it stands.

• Q4 earnings, 2026-08-05. Does “multiyear customer engagements” become contracted revenue, or stay a hedge against a demand question nobody has answered.
• Whether the correlation holds. 0.92 over the 28-session Korean window against 0.75 over the full history is a tightening under stress, not proof the relationship changed — watch whether it reverts once the Korean episode ages out of both windows.
• The 2026-07-31 FINRA settlement, not yet published. The only way to know whether the mid-July uptick in short interest continued into the late-month rally or reversed with it.
• The four-company capacity pledge. A 56.5% five-week drawdown is the kind of move that tests whether Micron, SanDisk, Western Digital and Seagate actually hold their own discipline.

SanDisk lives or dies by the same constraint as these names — small equal-weighted groups, one constraint each. Not investment products: see all categories.