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
21 current organization shown on this profile
Board positions
11 supported by public sources, 0 supplied by the profile owner
Committee roles
Not establishedNo committee role is currently confirmed by the cited sources
Qualifications
Not establishedNo qualification is currently confirmed by the cited sources

Professional narrative

About

Commenced employment in brokerage industry in 1959. Became Executive Vice President of Walston Company in 1962, later became CEO of Jesup Lamont which he purchased in 1983. Owned and controlled various brokerage firms including Kennedy Cabot Co., sold to Toronto Dominion Bank in 1997 for $160,000,000.

Sources are shown with the information they support.

Current roles

Appointments & responsibilities

Executive appointments

Board appointments

Governance

Board appointments, committee responsibilities and disclosed relationships.

Board and advisory record

Board service

Sources are shown with each role, education record, or credential.

Director

SIEBERT FINANCIAL CORP

Current · start date not disclosed

Confirmed by public sourceView source

Connections

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

SIEBERT FINANCIAL CORP

Open SIEBERT FINANCIAL CORP profile →

CEO at SIEBERT FINANCIAL CORP

Start not stated → End not stated

current · source reported

Observed: 2026-09-15

Director at SIEBERT FINANCIAL CORP

Start not stated → End not stated

current · source reported

Observed: 2026-09-15

SIEBERT FINANCIAL …SIEBERT FINANCIAL CORPJohn J. Gebbia

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 FilingSIEB 10-K executive officersSupports AI and ML experience, Cybersecurity experience, Executive company, Executive title, Technology background.Open sourceSource 2 · Sec Form OwnershipPublic profile sourceSupports CEO at SIEBERT FINANCIAL CORP (NASDAQ: SIEB), Director at SIEBERT FINANCIAL CORP (NASDAQ: SIEB), Executive title.Open sourceSource 3 · Sec FilingSIEB DEF 14A director slateSupports AI and ML experience, Board role, Committee assignments, Executive company, Executive title, Cybersecurity experience, Technology background.Open source

Basis

Identifiers, sources, dates and record limitations.

Identifiers

Alpha ID
alpha:person:john-j-gebbia
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 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Board membership · Source reportedServes on the board of SIEBERT FINANCIAL CORP1 source
Verification
Source reported
Confidence
Not stated
Last reviewed
Not stated
Board role · Source reportedBoard role: Chair1 source
Verification
Source reported
Confidence
92%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Committee assignments · Source reportedNo committee assignment disclosed in the cited filing1 source
Verification
Source reported
Confidence
88%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Cybersecurity experience · CorroboratedCybersecurity experience: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive company · CorroboratedExecutive at Siebert Financial Corp.Supported by 2 public records2 sources
Verification
Corroborated
Confidence
94%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive title · Source reportedExecutive title: CEO1 source
Verification
Source reported
Confidence
100%
Last reviewed
May 16, 2026
Executive title · Source reportedExecutive title: Chief Executive Officer and Chairman1 source
Verification
Source reported
Confidence
85%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Executive title · Source reportedExecutive title: Chief Executive Officer, Chairman and Director1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

Technology background · CorroboratedTechnology background: not identified in the cited filingSupported by 2 public records2 sources
Verification
Corroborated
Confidence
72%
Last reviewed
May 16, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

View all sources4 records
  1. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

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

  2. https://www.sec.gov/Archives/edgar/data/65596/000121390026027152/ownership.xml

    Sec Form Ownership · Tier not stated · Reviewed Aug 6, 2026

    Supports: CEO at SIEBERT FINANCIAL CORP (NASDAQ: SIEB) · Director at SIEBERT FINANCIAL CORP (NASDAQ: SIEB) · Executive title

  3. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 16, 2026

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

  4. https://www.sec.gov/Archives/edgar/data/65596/000121390026027152/ownership.xml

    Public Source · Tier not stated · Reviewed Not stated

    Supports: Board membership