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Profile

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Overview

Professional record at a glance

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Current roles
11 current organization shown on this profile
Board positions
Not establishedNo board position is currently listed on this profile
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

Steve Closter has served as Chief Commercial Officer since March 2024, previously serving in various roles at Sunovion Pharmaceuticals (consolidated into Sumitomo Pharma America) including VP of Brand Strategy and Launch Excellence. He also spent nearly 20 years in senior marketing and commercial roles at Forest Laboratories and Allergan, most recently as VP of Marketing.

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Current roles

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Syndax Pharmaceuticals Inc

Open Syndax Pharmaceuticals Inc profile →

Chief Commercial Officer at Syndax Pharmaceuticals Inc

Start not stated → End not stated

current · source reported

Observed: 2026-09-27

Syndax Pharmaceuti…Syndax Pharmaceuticals IncSteve Closter

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Experience

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Published record

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Source 1 · Sec FilingSNDX DEF 14A executive officersSupports AI and ML experience, Cybersecurity experience, Executive company, Executive title, Technology background.Open source

Basis

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Identifiers

Alpha ID
alpha:person:steve-closter
Record version
public-0

Published evidence records

2 evidence records, matching Agent View. Records may refer to different locations or observations in the same document. This count is not a count of independent corroborating sources.

  1. SNDX DEF 14A executive officers

    sec filing · Source published: Apr 30, 2026 · Retrieved: May 5, 2026

    Supports 5 claims
    • AI and ML experience: AI and ML experience: not identified in the cited filing · Claim reviewed: May 5, 2026
    • Cybersecurity experience: Cybersecurity experience: not identified in the cited filing · Claim reviewed: May 5, 2026
    • Executive company: Executive at Syndax Pharmaceuticals Inc · Claim reviewed: May 5, 2026
    • Executive title: Executive title: Chief Commercial Officer · Claim reviewed: May 5, 2026
    • Technology background: Technology background: not identified in the cited filing · Claim reviewed: May 5, 2026

  2. Open source

    sec def 14a · Source published: Apr 30, 2026 · Retrieved: Sep 13, 2026

    Supports 1 claim
    • Professional Role: Chief Commercial Officer at Syndax Pharmaceuticals Inc · Claim reviewed: Sep 13, 2026

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 · Source reportedAI and ML experience: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 5, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 5, 2026

Cybersecurity experience · Source reportedCybersecurity experience: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 5, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 5, 2026

Executive company · Source reportedExecutive at Syndax Pharmaceuticals Inc1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 5, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 5, 2026

Executive title · Source reportedExecutive title: Chief Commercial Officer1 source
Verification
Source reported
Confidence
94%
Last reviewed
May 5, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 5, 2026

Technology background · Source reportedTechnology background: not identified in the cited filing1 source
Verification
Source reported
Confidence
72%
Last reviewed
May 5, 2026
  • SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 5, 2026

View all sources2 records
  1. SEC EDGAR

    Sec Filing · Tier 3 · Reviewed May 5, 2026

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

  2. https://www.sec.gov/Archives/edgar/data/1395937/000119312526197859/sndx-20260430.htm

    Sec Def 14a · Tier not stated · Reviewed Sep 13, 2026

    Supports: Chief Commercial Officer at Syndax Pharmaceuticals Inc (NASDAQ: SNDX)