The Insider Ledger

Weekly intelligence from public SEC filings

Nothing on this site is investment advice. It is an automated research digest of public SEC filings.

MICRON TECHNOLOGY INC (MU)

Sector: semiconductors · Tracking since 2026-05-15

What am I looking at?

Everything on this page comes from public SEC filings that name this company. The cards show the automated signal score, net insider activity (open-market buys minus sells over the last 90 days), distinct insider buyers, and watchlist institutions currently holding the stock. The timeline lists each transaction row with a link to the original filing.

insider_buy / insider_sell
An officer or director traded on the open market (Form 4). Scheduled 10b5-1 plan trades are noted and treated as low-signal.
13f_new / 13f_add / 13f_trim / 13f_exit
A watchlist fund opened, increased, reduced, or closed a position between quarterly 13F reports — these become public up to 45 days after the quarter ends.
13d_filed
An investor crossed 5% ownership with activist intent (Schedule 13D).
50
Signal score
$0
Net insider value 90d
0
Insider buyers 90d
3
Watchlist holders

Watchlist holders

Analysis

Coatue scales its Micron stake roughly 16-fold strong (2026-W34)

Coatue's Q2 13F shows its Micron stake growing from 165,931 shares (Q1, filed May) to 2.78M shares — a roughly 16-fold increase, the largest proportional scale-up of any position in this week's filings. Altimeter opened a new $241.8M stake alongside it. Appaloosa moved the other way, trimming its MU position from 1.67M to 975K shares (-41%). The divergence between managers here is real: one fund made memory chips its highest-conviction add of the quarter, another cut by more than a third.

Filing timeline

FiledActorEventSharesValue ($)Source
2026-08-14coatue13f_new1,292,1141,491,474,269filing
2026-08-14coatue13f_new72,49783,682,562filing
2026-08-14coatue13f_new969,0401,118,553,182filing
2026-08-14coatue13f_new13,76115,884,185filing
2026-08-14coatue13f_new420,026484,831,812filing
2026-08-14coatue13f_new9,20010,619,468filing
2026-08-14altimeter13f_new209,520241,846,841filing
2026-08-14appaloosa13f_trim975,0001,125,432,750filing
2026-05-15coatue13f_new165,93156,058,129filing
2026-05-15appaloosa13f_add1,665,000562,503,600filing