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Seagate Stock Falls 4% on Insider Selling and Note Dilution

MarketBeat2 min read6 sources

Why is Seagate stock down today?

Seagate Technology (STX) stock fell 4% to $828 on Friday, hit by insider selling of $4.7 million and the issuance of 1.65 million dilutive shares to retire its 3.5% exchangeable notes.

Key numbers

STX 1-day decline-4.0% to $827.88from $862.33 prev close
STX YTD 2026 gain+209%vs Jan 1 2026
New shares issued (note retirement)1,647,862$150.7M principal retired (per [4])
Total insider selling Sep 10~$4.7MCEO Mosley + CFO Romano + EVP Morris
FY2026 annual revenue$12.20B+34% vs FY2025 $9.10B
Q1 FY2027 revenue guidance (midpoint)$4.10B±$100M; non-GAAP EPS $7.30

What happened

Seagate Technology (STX) stock fell 4% to $828 on Friday, hit by insider selling of $4.7 million and the issuance of 1.65 million dilutive shares to retire its 3.5% exchangeable notes. CEO William Mosley, CFO Gianluca Romano, and EVP John Morris each sold shares on September 10 under pre-set Rule 10b5-1 trading plans following restricted stock unit vestings, for a combined total of roughly $4.7 million. That same week, Seagate settled the final $150.7 million of its 3.5% exchangeable senior notes due 2028, issuing 1,647,862 ordinary shares — the last piece of a debt-conversion program that began in February 2026. Seagate stock remains up about 209% in 2026, driven by record demand for hard disk drives from AI data centers, and analysts hold a consensus price target of $1,125.

Why it matters

Seagate stock has tripled in 2026 on rising orders for hard drives from AI data centers, so insider selling draws immediate attention from investors watching for signs that executives think the stock has peaked. The 1.65 million new shares issued to retire the exchangeable notes slightly dilutes every existing shareholder's slice of the company — a process called dilution — even though the broader balance sheet benefit is real. Both events landed in the same week, compounding pressure on a stock already sitting 28% below its June high of $1,145.

Who this affects

Marketbearish
Medium impact
Storage stocks slid Friday while the broader market gained.
Companybearish
Medium impact
Insider selling adds valuation doubt for Seagate shareholders.
Competitorsmixed
Low impact
SanDisk fell ~3%; Micron held flat, shielded by AI DRAM.
Industryneutral
Low impact
Note program now complete; HDD sector debt structure cleaner.

Seagate vs Western Digital, SanDisk, Micron

SeagateSTX$188.8B-4.0%+209%23.2x
Western DigitalWDC$161.2B-3.0%—22.3x
SanDiskSNDK—-3.0%——
MicronMU$1.11Tflat+223%—

As of 2026-09-11

How we got here

  1. $600M note exchange closes; 5.95M new Seagate shares issued.

  2. STX hits 52-week peak of $1,145 on AI hard-drive demand surge.

  3. FY2026 results: $12.2B revenue, +34%; Q1 FY27 guided to $4.1B.

  4. Final $150.7M note tranche settled; 1.65M new shares issued.

  5. Three insiders sell ~$4.7M via pre-set plans; STX falls 4%.

What to watch

  • Q1 FY2027 earnings; Seagate guided $4.1B revenue and $7.30 non-GAAP EPS.Q4 2026
  • CEO and exec Form 4 filings; 63 insider sells vs zero buys in past 12 months.2026-10-01
  • AI cloud HDD order data; inventory build-up would pressure Seagate's 2027 targets.Q4 2026

Educational content only. Not investment advice.

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