Adobe
Adobe disclosed unauthorized access to customer information and source code for multiple products, followed by a broad password reset.
+6.0% ADBE vs +4.2% SPY
This site shows how share prices moved after an incident became public. It does not prove that the incident caused the move. Company news, sector moves and the wider market can affect every result. Educational only — not investment advice.
Disclosure timing
When could the market react?
The baseline is the last adjusted close before the news was public. The reaction session is the first close afterward.
- 01Baseline sessionOct 2, 2013
Normalized to 100 for both ADBE and SPY.
- 02Public disclosureOct 3, 2013 · time unknown
Publication time is not documented; lower timing precision.
- 03First reaction closeOct 3, 2013
-1.2% company total return versus -0.9% for SPY; -0.3 pp market-relative return.
Disclosure time is unknown; the previous session close is used as baseline.
Time windows
Company vs SPY
Each row uses the last trading session on or before its target date. “Market-relative” is the company return minus the SPY return, in percentage points.
| Window | Endpoint | ADBE | SPY | Market-relative | Signal |
|---|---|---|---|---|---|
| First reaction | Oct 3, 2013 | -1.2% | -0.9% | -0.3 pp | Below SPY |
| +7 days | Oct 10, 2013 | -0.7% | -0.0% | -0.7 pp | Below SPY |
| +1 month | Nov 1, 2013 | +6.0% | +4.2% | +1.8 pp | Above SPY |
| +3 months | Jan 3, 2014 | +14.8% | +8.7% | +6.1 pp | Above SPY |
| +6 months | Apr 3, 2014 | +21.2% | +12.6% | +8.6 pp | Above SPY |
| +12 months | Oct 3, 2014 | +32.8% | +18.4% | +14.3 pp | Above SPY |
Compare with current catalog aggregates
| Window | This case | Catalog median | Catalog mean | n |
|---|---|---|---|---|
| First reaction | -0.3 pp | -0.8 pp | -1.5 pp | 30 |
| +7 days | -0.7 pp | -2.0 pp | -4.0 pp | 30 |
| +1 month | +1.8 pp | -6.6 pp | -6.8 pp | 30 |
| +3 months | +6.1 pp | -5.1 pp | -6.6 pp | 30 |
| +6 months | +8.6 pp | -5.6 pp | -7.5 pp | 30 |
| +12 months | +14.3 pp | -3.7 pp | -10.1 pp | 30 |
Normalized total return
ADBE compared with SPY
Baseline session = 100. Adjusted close reflects splits and reinvested distributions.
Adobe had +32.8% company total return versus +18.4% for SPY; +14.3 pp market-relative return. The chart shows normalized adjusted-close performance for up to 24 months.
View tabular chart fallback
| Date | ADBE | SPY |
|---|---|---|
| Oct 2, 2013 | 100.0 | 100.0 |
| Oct 31, 2013 | 105.2 | 103.9 |
| Dec 2, 2013 | 110.2 | 106.7 |
| Jan 2, 2014 | 115.1 | 108.7 |
| Feb 3, 2014 | 112.8 | 103.5 |
| Mar 5, 2014 | 133.7 | 111.6 |
| Apr 3, 2014 | 121.2 | 112.6 |
| May 5, 2014 | 119.3 | 112.5 |
| Jun 4, 2014 | 124.6 | 115.3 |
| Jul 3, 2014 | 142.8 | 118.9 |
| Aug 4, 2014 | 133.5 | 116.3 |
| Sep 3, 2014 | 140.6 | 120.3 |
| Oct 2, 2014 | 130.2 | 117.1 |
| Oct 31, 2014 | 136.1 | 121.5 |
| Dec 2, 2014 | 142.6 | 124.8 |
| Jan 2, 2015 | 140.4 | 124.5 |
| Feb 3, 2015 | 139.6 | 124.1 |
| Mar 5, 2015 | 152.6 | 127.5 |
| Apr 6, 2015 | 148.0 | 126.5 |
| May 5, 2015 | 145.6 | 127.1 |
| Jun 4, 2015 | 152.9 | 127.9 |
| Jul 6, 2015 | 156.3 | 126.4 |
| Aug 4, 2015 | 159.3 | 128.1 |
| Sep 2, 2015 | 149.9 | 119.5 |
| Oct 2, 2015 | 163.0 | 119.9 |
Price recovery
Recovered
Here, recovery only means that adjusted close reached the baseline again. It does not mean every effect of the incident ended.
- State
- Recovered
- Initial trough
- -4.0% on Oct 9, 2013
- Recovery close
- Oct 4, 2013
- Calendar days
- 1
- Observation cap
- 24 months after disclosure
Hypothetical $1,000
What would $1,000 have looked like?
Compare $1,000 in ADBE with $1,000 in SPY, bought and measured on the same dates.
Entry Oct 7, 2013 Exit Apr 7, 2014
Uses fractional shares and adjusted close. Leaves out taxes, fees and slippage. The holding period starts on the purchase date. This is a historical illustration, not an investment strategy.
Case note
Adobe said attackers had accessed customer IDs, encrypted passwords and some payment-related information. It also disclosed illegal access to source code for multiple products and initiated password resets and customer notifications.
The company announcement is the disclosure anchor. Because no dependable publication time is recorded in the source, the methodology conservatively uses the previous session close as the baseline.
Evidence
Sources and case review
We qualify each case before checking its price results. These links support the disclosure date, listing, incident and business impact.
- primary Oct 3, 2013Important Customer Security Announcement Adobe Supports: Disclosure, Impact, Description
- primary Jan 21, 2014Adobe fiscal 2013 Form 10-K Adobe / U.S. SEC Supports: Listing, Impact
- Listing evidenceChecked Jul 20, 2026Adobe issuer record U.S. Securities and Exchange Commission SEC issuer history and the event-period reporting confirm Adobe's Nasdaq listing at disclosure.
Why it is included. Adobe was the direct victim and its security chief publicly documented both customer-data and source-code access, with a quantified initial customer population and company-wide remediation. Reviewed Jul 20, 2026.