Brian Shirley
CIK 1353179 · SVP, DRAM and Emerging Memory · last filed 2026-06-17
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$232.52M
Companies
2
Total Filings
78
Lifetime Open-Market Net
-$37.59M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Recent Filings · Page 7 of 8
78 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2010-04-05 | MU | Sell (S) | −20,750 | -$215.6K | EDGAR |
| 2010-01-05 | MU | Sell (S) | −20,000 | -$215.0K | EDGAR |
| 2009-10-08 | MU | Sell (S) | −19,158 | -$156.1K | EDGAR |
| 2009-10-08 | MU | Tax (F) | −5,947 | -$48.9K | EDGAR |
| 2009-10-07 | MU | Mixed | +64,100 | $0 | EDGAR |
| 2009-10-05 | MU | Tax (F) | −7,107 | -$53.0K | EDGAR |
| 2009-09-28 | MU | Tax (F) | −3,357 | -$27.2K | EDGAR |
| 2009-02-13 | MU | Tax (F) | −4,045 | -$15.9K | EDGAR |
| 2008-12-16 | MU | Tax (F) | −1,507 | -$2.9K | EDGAR |
| 2008-10-10 | MU | Tax (F) | −5,947 | -$23.3K | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.