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
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Reports & analysisAlpha Eval
Public sources
11 reviewed
Profile ownership
Not yet claimed
Last reviewed
May 16, 2026
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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 Unknown, unavailable, and unpublished values are never inferred as zero.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
Observed2026-09-21T09:38:10.738254+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