Profile

Identity, professional record and current appointments.

Overview

Professional record at a glance

A concise summary of information supported by the cited public sources. Missing information is treated as unknown, not as a negative finding.

Current roles
22 current organizations shown on this profile
Board positions
22 supported by public sources, 0 supplied by the profile owner
Committee roles
2Roles supported by the sources cited on this profile
Qualifications
Not establishedNo qualification is currently confirmed by the cited sources

Professional narrative

About

Alpha has not published a narrative summary because the current public source set is not sufficient.

Current roles

Appointments & responsibilities

Board appointments

Governance

Board appointments, committee responsibilities and disclosed relationships.

Connections

Explore the roles, education and affiliations published in this record.

Extra Space Storage

Open Extra Space Storage profile →

Director at Extra Space Storage

2017-01-01 → End not stated

current · source reported

Observed: 2026-09-13

Extra Space StorageExtra Space StorageInvitation HomesInvitation HomesJoseph D. Margolis

Dashed lines mark past roles. Select a connection to see its dates and sources.

Relationship map

Connected through the public record

Direct relationships from verified facts and published résumé records. Private connections are excluded.

Direct public links only

Only published affiliations are shown here. Private relationships require authorized access.

Experience

Career history, education, credentials and public contributions.

Published record

Featured coverage

Selected publications and public sources used to establish this profile. Inclusion records provenance; it is not an endorsement.

Source 1 · Sec FilingEXR DEF 14A director slateSupports AI and ML experience, Board role, Committee assignments, Executive company, Executive title, Cybersecurity experience, Technology background.Open sourceSource 2 · Sec ProxyPublic profile sourceSupports Independent Director at Invitation Homes (NYSE: INVH), Board membership.Open sourceSource 3 · Sec FilingInvitation Homes Inc. director board sourceSupports Board membership, Board independence.Open sourceSource 4 · Sec FilingExtra Space Storage Inc. director board sourceSupports Board membership, Director since, Board independence.Open source

Basis

Identifiers, sources, dates and record limitations.

Identifiers

Alpha ID
alpha:person:joseph-d-margolis
Record version
public-0

Sources

Sources and published information

Each item links to the public source used to support it. When sources disagree, the item is clearly marked for review.

AI and ML experience · CorroboratedAI and ML experience: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 17, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 17, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 2, 2026

AI expertise · Source reportedAI expertise: not identified in the cited filing1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

AI governance relevance · Source reportedAI governance relevance reported from role and filings1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board independence · Under reviewNot independent (executive director)1 source
Verification
Under review
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board independence · Under reviewIndependent director1 source
Verification
Under review
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board membership · Source reportedServes on the board of Extra Space Storage Inc.Supported by 2 public records1 source
Verification
Source reported
Confidence
95%
Last reviewed
May 3, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Board membership · CorroboratedServes on the board of Invitation Homes Inc.Supported by 3 public records3 sources
Verification
Corroborated
Confidence
95%
Last reviewed
May 17, 2026
Board role · CorroboratedBoard role: DirectorSupported by 2 public records2 sources
Verification
Corroborated
Confidence
92%
Last reviewed
May 17, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 17, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 15, 2026

Committee assignments · Source reportedNo committee assignment disclosed in the cited filing1 source
Verification
Source reported
Confidence
88%
Last reviewed
May 17, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 17, 2026

Committee assignments · Source reportedCommittee assignments: Compensation and Management Development Committee, Investment and Finance Committee1 source
Verification
Source reported
Confidence
88%
Last reviewed
May 15, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 15, 2026

Cybersecurity experience · CorroboratedCybersecurity experience: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 17, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 2, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 17, 2026

Executive company · CorroboratedExecutive at Extra Space Storage Inc.Supported by 3 public records3 sources
Verification
Corroborated
Confidence
94%
Last reviewed
May 17, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 17, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 2, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Executive function · Source reportedEnterprise Leadership (CEO)1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 3, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Executive title · CorroboratedExecutive title: Chief Executive OfficerSupported by 3 public records3 sources
Verification
Corroborated
Confidence
94%
Last reviewed
May 17, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 17, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 2, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

Technology background · CorroboratedTechnology background: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 17, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 2, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 17, 2026

View all sources8 records
  1. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 17, 2026

    Supports: AI and ML experience · Board role · Committee assignments · Executive company · Executive title · Cybersecurity experience · Technology background

  2. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 2, 2026

    Supports: AI and ML experience · Cybersecurity experience · Executive company · Executive title · Technology background

  3. https://www.sec.gov/Archives/edgar/data/1289490/000128949026000027/exr-20260330.htm

    Sec Proxy · Tier not stated · Reviewed May 3, 2026

    Supports: Director at Extra Space Storage (NYSE: EXR)

  4. https://www.sec.gov/Archives/edgar/data/1687229/000119312526126310/d96989ddef14a.htm

    Sec Proxy · Tier not stated · Reviewed May 3, 2026

    Supports: Independent Director at Invitation Homes (NYSE: INVH) · Board membership

  5. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: Board membership · Board independence

  6. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 15, 2026

    Supports: Board role · Committee assignments

  7. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: Board membership · Director since · Board independence

  8. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 3, 2026

    Supports: AI expertise · AI governance relevance · Executive company · Executive function · Executive title