Alpha RegistryClaim a profile

Arch Capital Group, for agents

The same record as the human view, as a structured object any agent can read and cite. Reading is open to every agent, model, and tool, with no key and no account. Signing and transparency logging are not yet published for this record.

Alpha ID
alpha:company:9e99b5bd-7724-4353-a2ee-c058b83deca4
Version
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceRecorded Oct 18, 2026
Content hash
Not yet signed
Signature
Not yet signed
Transparency log
Not yet signed
Freshness
ObservedChecked Oct 18, 2026. Reviewed Oct 18, 2026
Read access
OpenNo key for public retrieval
Processing basis
Public recordDoctrine

Read

Open

One canonical URL. The Accept header or a file suffix selects the format. Every format renders the same Claims and carries the same record version.

curl -H "Accept: application/json" https://registry.alpha.ac/companies/arch-capital-group
Response headers
Body

TrustCheck and Governance Receipts

Agent tier
Illustrative

Illustrative. TrustChecks run in the private enterprise overlay. The example below is generated for this entity class and does not reference this record. Contract: TrustCheck and Governance Receipts v0.1.

Agents about to act ask a question, not for a document. A TrustCheck evaluates the AuthorityGrant objects behind a proposed action and returns allow, deny, require_approval, or insufficient_evidence. The source system acts, and a GovernanceReceipt records what the agent relied on.

allow, deny
The AuthorityGrant and policy decide. Reason codes name the rule.
require_approval
An entitled human records the decision. Customer policy sets the threshold, never an Eval.
insufficient_evidence
No authority is registered. Alpha never infers permission to act.
Request (illustrative)
curl https://www.alpha.ac/v1/action-intents \
  -H 'Content-Type: application/json' \
  -b "$ALPHA_SESSION_COOKIE" \
  -d '{
    "schema_version": "2026-08-29",
    "environment": "test",
    "actor": { "alpha_id": "alpha:account:self", "type": "alpha_account" },
    "principal": { "alpha_id": "alpha:company:example-issuer", "type": "organization" },
    "organization": { "alpha_id": "alpha:company:example-issuer", "type": "organization" },
    "proposed_action": { "type": "purchase_order.commit", "description": "Accept an order placed by an agent claiming company authority." },
    "requested_authority": ["purchase_order.commit"]
  }'
# then
curl https://www.alpha.ac/v1/trust-checks -H 'Content-Type: application/json' \
  -b "$ALPHA_SESSION_COOKIE" -d '{ "action_intent_id": "<from the previous response>" }'
TrustCheck (illustrative)
{
  "schema_version": "2026-08-29",
  "trust_check_id": "alpha:trust-check:illustrative-0001",
  "decision": "insufficient_evidence",
  "explanation": "No AuthorityGrant names this agent and organization.",
  "reason_codes": [
    "authority_grant_missing"
  ],
  "evaluated_authority": {
    "authority_grants": []
  },
  "policy_version": "trustcheck.registry-claim.test.v0.1",
  "integrity_state": "recorded",
  "limitations": [
    "Illustrative example. No TrustCheck was run for this record."
  ]
}
GovernanceReceipt (illustrative, not issued)
{
  "schema_version": "2026-08-29",
  "receipt_id": "alpha:receipt:illustrative-0001",
  "environment": "test",
  "actor": {
    "alpha_id": "alpha:account:self",
    "type": "alpha_account"
  },
  "agent": {
    "provider": {
      "alpha_id": "alpha:company:example-agent-provider",
      "type": "provider"
    },
    "product": {
      "alpha_id": "alpha:agent-product:example-procurement-agent",
      "type": "agent_product"
    },
    "deployment": {
      "alpha_id": "alpha:agent-deployment:example-deployment",
      "type": "agent_deployment"
    },
    "use_case": {
      "alpha_id": "alpha:agent-use-case:example-purchase-order",
      "type": "agent_use_case"
    },
    "workflow": "Illustrative purchase order commitment"
  },
  "principal": {
    "alpha_id": "alpha:company:example-issuer",
    "type": "organization"
  },
  "sponsor": {
    "alpha_id": "alpha:company:example-issuer",
    "type": "organization"
  },
  "action_intent_id": "alpha:action-intent:illustrative-0001",
  "trust_check_id": "alpha:trust-check:illustrative-0001",
  "authority_grant_references": [],
  "action_intent": {
    "type": "purchase_order.commit"
  },
  "affected_alpha_ids": [
    "alpha:company:example-issuer"
  ],
  "trust_check_decision": "insufficient_evidence",
  "policy_version": "trustcheck.registry-claim.test.v0.1",
  "rule_references": [
    {
      "reason_code": "authority_grant_missing",
      "rule_id": "trustcheck.authority_grant_missing",
      "policy_ref": "trustcheck.registry-claim.test.v0.1",
      "control_ref": null,
      "grant_policy_references": []
    }
  ],
  "integrity": "Illustrative. Not issued, not signed."
}
Until the company registers AuthorityGrants, every agent claiming its authority returns insufficient evidence.

Connect

Open read

Every surface reads the same published record. No surface holds its own copy of the facts.

// claude_desktop_config.json, Cursor, or any MCP client
{
  "mcpServers": {
    "alpha": { "url": "https://mcp.alpha.ac/mcp" }
  }
}

// This record as an MCP resource
alpha://companies/arch-capital-group
  • alpha://companies/arch-capital-groupThis record as an MCP resource
  • https://registry.alpha.ac/api/public/companies/arch-capital-group?format=recordThe same record over HTTP

Subscribe to changes

Agent tier, preview

No public subscription endpoint is published yet. Event delivery is part of Agent tier access, in preview. Access and availability.

  • EXECUTIVE_APPOINTEDDerived governance event published on this record (alpha-governance-event-derivation-v2)
  • CFO_CHANGEDDerived governance event published on this record (alpha-governance-event-derivation-v2)
  • GC_CHANGEDDerived governance event published on this record (alpha-governance-event-derivation-v2)
  • CEO_CHANGEDDerived governance event published on this record (alpha-governance-event-derivation-v2)
  • DIRECTOR_APPOINTEDDerived governance event published on this record (alpha-governance-event-derivation-v2)
  • COMMITTEE_MEMBER_ADDEDDerived governance event published on this record (alpha-governance-event-derivation-v2)
  • COMMITTEE_CREATEDDerived governance event published on this record (alpha-governance-event-derivation-v2)
  • BOARD_CHAIR_CHANGEDDerived governance event published on this record (alpha-governance-event-derivation-v2)
  • COMMITTEE_CHAIR_CHANGEDDerived governance event published on this record (alpha-governance-event-derivation-v2)
{
  "specversion": "1.0",
  "type": "ac.alpha.registry.EXECUTIVE_APPOINTED",
  "source": "https://registry.alpha.ac/companies/arch-capital-group",
  "subject": "alpha:company:9e99b5bd-7724-4353-a2ee-c058b83deca4",
  "data": {
    "record_version": "public-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ce",
    "note": "Subscription delivery is Agent tier, preview. Not yet available publicly."
  }
}

Versions and changes

Open

Records are versioned. Derived governance events on this record are listed below with the version that publishes them. Effective is the world time the derivation states; Recorded is when Alpha detected the event. Content hashes and log entries appear once records are signed.

VersionEffectiveRecordedContent hashLog entryWhat changed
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedChris Hovey executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedChristine Todd executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedDavid E. Gansberg executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedFrançois Morin executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedJay Rajendra executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedJennifer Centrone executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedJerome Halgan executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedLouis T. Petrillo executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedMaamoun Rajeh executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedMatthew Shulman executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedMichael Schmeiser executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceMar 24, 2026Oct 18, 2026Not yet signedNot yet signedNicolas Papadopoulo executive of Arch Capital Group, effective 2026-03-24.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2025Oct 18, 2026Not yet signedNot yet signedAlexander Moczarski seat on Arch Capital Group, effective 2025-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2025Oct 18, 2026Not yet signedNot yet signedAlexander Moczarski member of Compensation and Human Capital, effective 2025-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2024Oct 18, 2026Not yet signedNot yet signedDaniel J. Houston seat on Arch Capital Group, effective 2024-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2024Oct 18, 2026Not yet signedNot yet signedNeal Triplett seat on Arch Capital Group, effective 2024-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2024Oct 18, 2026Not yet signedNot yet signedNicolas Papadopoulo seat on Arch Capital Group, effective 2024-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2024Oct 18, 2026Not yet signedNot yet signedCompensation and Human Capital; Nominating and Governance committee of Arch Capital Group, effective 2024-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2024Oct 18, 2026Not yet signedNot yet signedDaniel J. Houston member of Compensation and Human Capital; Nominating and Governance, effective 2024-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2021Oct 18, 2026Not yet signedNot yet signedEileen Mallesch seat on Arch Capital Group, effective 2021-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2021Oct 18, 2026Not yet signedNot yet signedFrancis Ebong seat on Arch Capital Group, effective 2021-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2021Oct 18, 2026Not yet signedNot yet signedAudit · Chair committee of Arch Capital Group, effective 2021-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2021Oct 18, 2026Not yet signedNot yet signedEileen Mallesch member of Audit · Chair, effective 2021-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2021Oct 18, 2026Not yet signedNot yet signedAudit; Compensation and Human Capital; Nominating and Governance committee of Arch Capital Group, effective 2021-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2021Oct 18, 2026Not yet signedNot yet signedFrancis Ebong member of Audit; Compensation and Human Capital; Nominating and Governance, effective 2021-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2020Oct 18, 2026Not yet signedNot yet signedMoira Kilcoyne seat on Arch Capital Group, effective 2020-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2020Oct 18, 2026Not yet signedNot yet signedAudit; Compensation and Human Capital · Chair; Nominating and Governance committee of Arch Capital Group, effective 2020-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2020Oct 18, 2026Not yet signedNot yet signedMoira Kilcoyne member of Audit; Compensation and Human Capital · Chair; Nominating and Governance, effective 2020-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2018Oct 18, 2026Not yet signedNot yet signedLaurie S. Goodman seat on Arch Capital Group, effective 2018-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2018Oct 18, 2026Not yet signedNot yet signedAudit; Nominating and Governance committee of Arch Capital Group, effective 2018-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2018Oct 18, 2026Not yet signedNot yet signedLaurie S. Goodman member of Audit; Nominating and Governance, effective 2018-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2010Oct 18, 2026Not yet signedNot yet signedBrian S. Posner seat on Arch Capital Group, effective 2010-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2010Oct 18, 2026Not yet signedNot yet signedCompensation and Human Capital; Finance, Investment and Risk · Chair committee of Arch Capital Group, effective 2010-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2010Oct 18, 2026Not yet signedNot yet signedBrian S. Posner member of Compensation and Human Capital; Finance, Investment and Risk · Chair, effective 2010-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2001Oct 18, 2026Not yet signedNot yet signedJohn L. Bunce seat on Arch Capital Group, effective 2001-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2001Oct 18, 2026Not yet signedNot yet signedJohn M. Pasquesi seat on Arch Capital Group, effective 2001-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2001Oct 18, 2026Not yet signedNot yet signedJohn M. Pasquesi chairs board Arch Capital Group, effective 2001-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2001Oct 18, 2026Not yet signedNot yet signedExecutive; Finance, Investment and Risk committee of Arch Capital Group, effective 2001-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2001Oct 18, 2026Not yet signedNot yet signedJohn M. Pasquesi chairs Executive; Finance, Investment and Risk, effective 2001-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2001Oct 18, 2026Not yet signedNot yet signedExecutive; Finance, Investment and Risk; Nominating and Governance · Chair committee of Arch Capital Group, effective 2001-01-01.
vpublic-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ceJan 1, 2001Oct 18, 2026Not yet signedNot yet signedJohn L. Bunce member of Executive; Finance, Investment and Risk; Nominating and Governance · Chair, effective 2001-01-01.

Access, rights, and the public-role doctrine

Facts are open. Rights travel with every Claim and every Evidence record, so an agent sees the same terms whichever format it reads.

CapabilityAccessAgents
Alpha Disclosure samplepublichuman process
Alpha public websitepublicretrievable now
Alpha Standard, methodology, and researchpublicretrievable now
Alpha Profiles (public executive and company records)publicretrievable now
Public HTTP endpoints described by OpenAPI 3.1publicretrievable now
Alpha MCP public discovery and read-only capabilitiespublicretrievable now
Alpha AI Readiness Evalpublichuman process
Alpha Platformapproved accessrequires approved access
Alpha API (authenticated operations)approved accessrequires approved access
Alpha MCP premium capabilitiesapproved accessrequires approved access
Alpha Evals and verified assessmentscustomhuman process
Alpha Council membershipcustomhuman process
Alpha Institute education, workshops, and coachingcustomhuman process
Governance diagnostics and institutional advisorycustomhuman process

Record limitations. Every representation states these in the same words; nothing is inferred as zero.

  • Absence of a leadership role, committee, or disclosure is not evidence that it does not exist.
  • Only explicitly published canonical company identity and current confirmed public roles are included.
  • Absence of a board, committee, executive, listing, or claim is not evidence that it does not exist.
  • Public retrieval does not grant redistribution, model-training, direct-contact, or relationship-pathfinding rights.
  • This Company Profile is an identity and evidence record, not an Alpha rating.
"rights": {
  "public_retrieval": "allowed",
  "agent_retrieval": "allowed",
  "redistribution": "not_granted",
  "model_training": "not_granted",
  "commercial_use": "not_specified",
  "relationship_pathfinding": "not_granted",
  "direct_contact": "not_granted"
}
"evidence_rights": {
  "evidence_records": 20,
  "redistribution_allowed": 0,
  "restricted_or_unknown": 20,
  "classified_unknown": 20
}
"data_subject": {
  "basis": "public_record",
  "entity": "alpha:company:9e99b5bd-7724-4353-a2ee-c058b83deca4",
  "identity_ownership": "unclaimed",
  "rights": {
    "public_retrieval": "allowed",
    "agent_retrieval": "allowed",
    "redistribution": "not_granted",
    "model_training": "not_granted",
    "commercial_use": "not_specified",
    "relationship_pathfinding": "not_granted",
    "direct_contact": "not_granted"
  },
  "requests": "https://www.alpha.ac/contact"
}

How agents find this

Open

The page head and every response carry rel="alternate" links and the Registry's Link header. The list below is generated from the same list the server emits.

Record map and assertion states

SectionAnchorResourceStateClaims
Identity#c-subject/identityPublished0
Corporate structure-/corporate_structureNot reviewed-
Board#c-board/boardPublished12
Committees#c-committees/committeesPublished28
Leadership#c-leadership/leadershipPublished14
Ownership#c-control/ownershipNot reviewed0
Financials#c-financials/financialsNot reviewed4
Capital structure-/capital_structurePublished-
Compensation#c-comp/compensationNot reviewed0
Governance#c-governance/governanceNot reviewed0
Shareholder governance-/shareholder_governanceNot reviewed-
Audit-/auditNot reviewed-
Legal#c-legal/legalNot reviewed0
Risk#c-risk/riskNot reviewed0
Cyber-/cyberNot reviewed-
AI governance#c-ai/ai_governanceNot reviewed0
Agent governance#c-authority/agent_governanceRestricted0
Markets external-/markets_externalPublished-
Events#c-history/eventsPublished41
Relationships#c-links/relationshipsPublished27
Assessments#c-monitor/assessmentsPublished0
Evidence#c-evidence/evidencePublished20
  • corroboratedTwo or more independent sources agree
  • source_reportedOne cited source states it
  • alpha_inferenceAlpha's conclusion, with reasoning
  • not_disclosedSearched, nothing found. Never rendered as false
  • not_reviewedNot yet searched
  • not_registeredNo authority registered with Alpha
Appearance

Alpha Governance PBC. The Registry records reported facts and Alpha's assessments separately. A missing fact is not evidence that it is false.

Record alpha:company:9e99b5bd-7724-4353-a2ee-c058b83deca4, version public-1:d751713988987e9331980363e24189ce:ro-d751713988987e9331980363e24189ce. https://registry.alpha.ac/companies/arch-capital-group

Navigate

Agent view

  1. Record status
  2. Read
  3. TrustCheck and Receipts
  4. Connect
  5. Subscribe
  6. History
  7. Access and rights
  8. Discovery
  9. Record map

Linked records

Registry

Appearance

esc
  • Actions
    Switch to human view
  • Copy Alpha IDalpha:company:9e99b5bd-7724-4353-a2ee-c058b83deca4
  • Cite this recordArch Capital Group
  • Copy canonical URLregistry.alpha.ac/companies/arch-capital-group
  • Copy as MarkdownWith assertion states
  • Report an error
  • Theme: System
  • Theme: Light
  • Theme: Dark
  • Records
    Arch Capital GroupCompany
  • Chris HoveyPerson
  • Christine ToddPerson
  • David E. GansbergPerson
  • François MorinPerson
  • Jay RajendraPerson
  • Jennifer CentronePerson
  • Jerome HalganPerson
  • Louis T. PetrilloPerson
  • Maamoun RajehPerson
  • Matthew ShulmanPerson
  • Michael SchmeiserPerson
  • Nicolas PapadopouloPerson
  • Alan TiernanPerson
  • William SoaresPerson
  • Alexander MoczarskiPerson
  • Brian S. PosnerPerson
  • Daniel J. HoustonPerson
  • Eileen MalleschPerson
  • Francis EbongPerson
  • John L. BuncePerson
  • John M. PasquesiPerson
  • Laurie S. GoodmanPerson
  • Moira KilcoynePerson
  • Neal TriplettPerson
  • Eugene S. SunshinePerson
  • John D. VollaroPerson
  • Sections
    OverviewArch Capital Group
  • MonitoringArch Capital Group
  • LeadershipArch Capital Group
  • BoardArch Capital Group
↑ ↓ move↵ openThis record only

Report an error

Reports attach to the Claim and go to an Alpha analyst through the correction form. Corrections are versioned, and the original stays in history.