Person profile

Public information reviewed
Portrait of Marianne C. Brown

Marianne C. Brown

Board role

Director · International Business Machines Corporation (NYSE: IBM)

Board role

Independent Director · Charles Schwab Corporation (NYSE: SCHW-PJ)

Board role

Director · Northrop Grumman (NYSE: NOC)

International Business Machines Corporation (NYSE: IBM)

Director · Current mandate

Director · Board
FollowSave PDF
More
Reports & analysisAlpha Eval
Evidence records
11
Profile ownership
Not yet claimed
Record reviewed
May 16, 2026
View evidence

Agent View

Machine representations

Inspect the same governed public record as Markdown, structured data, or a retrieval endpoint.

Canonical entity
alpha:person:marianne-c-brown
Schema
alpha.governance.entity.public.v1
Last reviewed
2026-05-16T04:25:58.297+00:00
Verification
corroborated
Ownership
unclaimed

Markdown

https://registry.alpha.ac/people/marianne-c-brown.md
Open Markdown

Marianne C. Brown

Alpha governed public record. Unknown, unavailable, and unpublished values are never inferred as zero.

Record

FieldValue
Representationalpha-profile-markdown-v3
ProtocolAlpha Governance Facts Protocol 0.1
Schemaalpha.governance.entity.public.v1
Record versionpublic-0
Canonical entityalpha:person:marianne-c-brown
Entity typePerson
Canonical URLhttps://registry.alpha.ac/people/marianne-c-brown
PublicationPUBLISHED
Verificationcorroborated
Verification schemaalpha-verification-states-v1
Ownershipunclaimed
Published claims15
Claims under review0
Evidence records11
Conflicts0
Conflicts in internal review0
Observed2026-09-24T14:58:26.471389+00:00
Last reviewed2026-05-16T04:25:58.297+00:00

Identity

  • Legal name: Marianne C. Brown
  • Display name: Marianne C. Brown

Leadership

  • PUBLISHED

Roles

  • Director at International Business Machines Corporation. Valid from: 2023-01-01. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:7.
  • Independent Director at Charles Schwab Corporation. Valid from: 2020-01-01. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:2.
  • Director at Northrop Grumman. Valid from: 2015-01-01. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:8.

Governance

  • PUBLISHED

Board committees

  • PUBLISHED

AI and ML experience

  • AI and ML experience: not identified in the cited filing. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:1.

Board independence

  • Independent director. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:3, alpha:evidence:person:marianne-c-brown:4.

Board membership

  • Serves on the board of Charles Schwab Corporation. Valid from: 2023-01-01. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:10, alpha:evidence:person:marianne-c-brown:4, alpha:evidence:person:marianne-c-brown:3.
  • Serves on the board of IBM. Valid from: 2023-01-01. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:4, alpha:evidence:person:marianne-c-brown:9, alpha:evidence:person:marianne-c-brown:3.
  • Serves on the board of Northrop Grumman Corporation. Valid from: 2015-01-01. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:3, alpha:evidence:person:marianne-c-brown:11, alpha:evidence:person:marianne-c-brown:4.

Board role

  • Board role: Director. Valid from: 2025-04-04. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: corroborated. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:1, alpha:evidence:person:marianne-c-brown:5, alpha:evidence:person:marianne-c-brown:6.

Committee assignments

  • No committee assignment disclosed in the cited filing. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:3.
  • Committee assignments: Audit and Risk, Nominating/Governance. Valid from: 2025-04-04. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:6.
  • Committee assignments: Directors and Corporate Governance. Valid from: 2026-03-10. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:5.
  • Committee assignments: Risk. Valid from: 2026-04-06. Valid to: NOT_ASSERTED. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:1.

Cybersecurity experience

  • Cybersecurity experience reported in filings. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:1.

Technology background

  • Technology background reported in filings. Publication: PUBLISHED. Verification: source_reported. Assertion: source_reported. Evidence: alpha:evidence:person:marianne-c-brown:1.

Coverage states

FieldValue
IdentityPUBLISHED
BusinessNOT_APPLICABLE
LeadershipPUBLISHED
Board and committeesPUBLISHED
GovernancePUBLISHED
FinancialsNOT_APPLICABLE
WorkforceNOT_APPLICABLE
OwnershipNOT_APPLICABLE
RatingsNOT_PUBLISHED
Market and index contextNOT_APPLICABLE

Public sources

Rights

FieldValue
public_retrievalallowed
agent_retrievalallowed
redistributionnot_granted
model_trainingnot_granted
commercial_usenot_specified
relationship_pathfindingnot_granted
direct_contactnot_granted

Limitations

  • Only permissioned public claims and evidence are included.
  • Absence of a claim is not evidence that the underlying fact is false.
  • Public retrieval does not grant model-training or redistribution rights.
  • Private relationships and Council activity are excluded.

Alternate representations

Connected governance records

Structured intelligence is not currently available. Existing published profile evidence remains accessible.