HackingHealthcareHealthcareStolen CredentialsCustomer Data InvolvedTargetedIdentity (basic)Financial accountLowContained

Apellis Pharmaceuticals, Inc.

bd_a1121296145378bc · schema v1 · pii pii-v1

Severity

Low

Discovered

Aug 28, 2024

Filed

Sep 30, 2024

To disclose

5 weeks

Affected · nationwide

7334 in this filing

Linked

6 filings

Confidence

65%

Full breach record for Apellis Pharmaceuticals, Inc. →

Apellis Pharmaceuticals, Inc. reported an external system breach (hacking) where an unauthorized actor accessed an employee's email account. The incident occurred between August 26-27, 2024, and was discovered on August 28, 2024. Personal information including names, addresses, and financial account/routing numbers were exposed. 733 individuals were affected, including 4 Maine residents. Notices were sent on September 30, 2024, offering 12 months of identity monitoring.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Aug 28, 2024 → Filed with AG Sep 30, 202433d ⏱ ME AG >30d5 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 2 days

discovery → filing · 5 weeks / 33 days

Aug 26, 2024

Begins

Aug 28, 2024

Discovered

Sep 30, 2024

Filed

vs. sector median

7 wks faster

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Massachusetts State AGbd_5d26afb2c7aa56a22024-09-30Verified
Vermont State AGbd_1280d192e6ba9d092024-09-27 · +3dVerified
Indiana State AGbd_914bc4add331a8c92024-09-27 · +3dVerified
New Hampshire State AGbd_3510931627ac97592024-10-04 · +4dVerified

Show 1 more filing ↓up to 37d gap

New Hampshire State AGbd_a540d1f2efb8cc552024-11-06 · +37dVerified

Name: Apellis Pharmaceuticals, Inc.
norm: apellis pharmaceuticals

Name: Apellis Pharmaceuticals, Inc.
norm: apellis pharmaceuticals
Industry: Healthcarellm

Discovered: Aug 28, 2024
Breach occurred: Aug 26, 2024 – Aug 27, 2024
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 30, 2024
Affected individuals: 733state + nationwide
Data types: Identity (basic)Financial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Reviewing accounts and files that could have been accessed
Conducting malware scans
Remediating malicious content
Resetting impacted accounts
Conducted enhanced awareness outreach to all employees regarding security best practices
Arranged to make available to you twelve (12) months of identity monitoring provided by Kroll at no charge
Changes made: Reviewing accounts and files that could have been accessed
Conducting malware scans
Remediating malicious content
Resetting impacted accounts
Conducted enhanced awareness outreach to all employees regarding security best practices
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(33 days from discovery to filing)
Compliance flags: ME AG >30d · 33d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Aug 28, 2024
→ Filed with AG: Sep 30, 2024
33d 30 days (soft) ME AG >30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Aug 28, 2024 → Filed with AG: Sep 30, 2024	33d	30 days (soft)	ME AG >30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 5 states

View merged incident ↗

Vermont State AGSep 27 · first

Indiana State AGSep 27 · first

Massachusetts State AG+3d

Maine State AG+3d · this page

New Hampshire State AG+7d

New Hampshire State AG+40d

Pattern: first filing Sep 27 (VT), last Nov 6 (NH) — a 40-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/bf43360e-53d5-4624-9d81-1ecbc6d9ecba.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 30, 2024
Raw hash: ee1069d6371fb0039125d7018df58bcb8519ad0c2b9ed4bd1ac99c6f3abfa003

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityApellis Pharmaceuticals, Inc.

Victim entityApellis Pharmaceuticals, Inc.

Incidentdiscovered Aug 28, 2024

Stated responseReviewing accounts and files that could have been accessed

ComplianceME AG >30d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov