Listed companies named as breach victims in the last 90 days: in the US, London, Dubai and Abu Dhabi. Each chart starts at the last closing price before the story (0%) and compares the share price with its home market (the S&P 500 or the FTSE 100) over the same days. Prices move for many reasons, so this shows what happened around the story, not what caused it.
S&P 500 -1.3% over the same days, so 17.1 points worse than the market.
ATEYY
S&P 500
Daily prices
Day
ATEYY close
ATEYY
S&P 500
2026-09-22
$216.60
-18.8%
-0.7%
2026-09-23
$213.00
-20.1%
-1.4%
2026-09-24
$209.42
-21.5%
-1.5%
2026-09-25
$219.34
-17.8%
-1.0%
2026-09-28
$216.00
-19.0%
-1.7%
2026-09-29
$223.36
-16.3%
-1.9%
2026-09-30
$220.86
-17.2%
-2.1%
2026-10-01
$235.45
-11.7%
-1.9%
2026-10-02
$255.19
-4.3%
-1.2%
2026-10-05
$254.66
-4.5%
-0.5%
2026-10-06 (before story)
$266.75
+0.0%
+0.0%
2026-10-07
$259.29
-2.8%
-0.2%
2026-10-08
$249.96
-6.3%
-0.7%
2026-10-09
$260.82
-2.2%
-0.1%
2026-10-12
$252.14
-5.5%
-0.1%
2026-10-13
$253.90
-4.8%
-0.1%
2026-10-14
$245.45
-8.0%
-1.2%
2026-10-15
$226.57
-15.1%
-0.9%
2026-10-16
$209.00
-21.6%
-2.0%
2026-10-19
$217.71
-18.4%
-1.6%
2026-10-20
$217.65
-18.4%
-1.3%
SECFiles with the SEC as a foreign company, so the Item 1.05 breach rule doesn't apply. Its breach news would come in a 6-K or at home.
Security vendor watch
Big cybersecurity companies over the last 30 trading days, against the S&P 500. Dots mark days SentryFeed had a Major or Medium story about a flaw or breach in the company's own products, so you can see whether its share price moved around them. All charts use the same scale.
Companies and breach filings from the SEC's EDGAR; daily closing prices from Alpha Vantage. Since December 2023, US-listed companies must file an 8-K under Item 1.05 within four business days of deciding a cyber incident is material. Not financial advice.