internal
Christopher S. Boerner, Ph.D.
Board Chair and Chief Executive Officer
Executive
2 yr
6 reports
Bristol-Myers Squibb ·BMY
Commercial, development, and digital chiefs report directly to CEO
Pharmaceuticals · Fortune #74 · Divisional structure · 34K employees · New York, NY
View as of:
6
CEO span
↓ tighter than peers (avg 9)
1
Avg span
tight
2
Max depth
2 levels
3 yr
Avg tenure
↓ 1.0yr from FY2024
50%
Internal hires
near industry avg
Consolidated financials FY2025 · period end 2025-12-31 · 10-K
Revenue
$48.2B
Net income
$7.1B
Total assets
$90.0B
Shares out
2.04B
Sourced from Bristol-Myers Squibb DEF 14A · filed 2026-03-25 ↗ View on SEC
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Bristol-Myers Squibb organizational chart
Explore the executive structure, reporting layers, and scenario-ready operating model from public filings.
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Commercial, development, and digital chiefs all report directly to the CEO. This page maps Bristol-Myers Squibb’s executive structure, highlights recent leadership changes, and compares its CEO-centric model with large pharma peers.
What to model
Use the chart to test org decisions, not just view reporting lines
Start with the public baseline, then use the scenario views and source-backed changes to ask what happens when leadership, span, or team ownership shifts.
Latest signal Samit Hirawat, M.D. departed as EVP, Chief Medical Officer, Head of Development
Departed effective November 1, 2025; transitioned to advisor role on August 1, 2025.
Source · See change logScenario views in the chart
- Add Chief AI Officer Create a Chief AI Officer role reporting to the CEO to consolidate enterprise AI initiatives across R&D and operations.
- Introduce Chief Operating Officer Insert a COO between the CEO and commercial/supply leaders to reduce CEO span and standardize execution.
Atlas work this supports
- Connect Workday or UKG Get these analytics for YOUR org — tenure, span of control, headcount, automatically from your HRIS.
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The people
Who's running this
7 executives identified as Named Executive Officers in the most recent SEC proxy. Bar length scales with tenure.
David V. Elkins
Executive Vice President and Chief Financial Officer
Finance
3 yr
0 reports
Cristian Massacesi, M.D.
Executive Vice President, Chief Medical Officer, Head of Development
R&D
1 yr
0 reports
internal
Adam Lenkowsky
Executive Vice President, Chief Commercialization Officer
Commercial
4 yr
0 reports
Greg Meyers
Executive Vice President, Chief Digital and Technology Officer
Digital & Technology
3 yr
0 reports
Sandra Leung
Executive Vice President and General Counsel
Legal
5 yr
0 reports
Karin Shanahan
Executive Vice President, Global Product Development & Supply
Manufacturing & Supply
4 yr
0 reports
The businesses
How Bristol-Myers Squibb divides the work
3 divisions report into the group CEO. Tile size scales with estimated headcount.
Global Commercialization
8K employees
Chief Commercialization Officer (Adam Lenkowsky)
Leads global marketing, sales, and launch execution for growth and legacy portfolios.
Research & Development
10K employees
Chief Medical Officer, Head of Development (Cristian Massacesi)
Oversees clinical development, pipeline progression, and regulatory science.
Finance
2K employees
Chief Financial Officer (David V. Elkins)
Manages financial planning, reporting, capital allocation, and investor relations.
The thesis
Why this org is unusual
Commercialization, development, and digital leaders all report directly to the CEO, underscoring a CEO-centric operating model.
The structure emphasizes execution across pipeline, go-to-market, and technology rather than inserting an intermediary COO layer.
This reflects Bristol-Myers Squibb’s focus on accelerating growth assets and digital productivity initiatives while keeping financial, legal, and supply chain leadership tightly coupled to the CEO.
- No Chief Operating Officer
- Direct CEO oversight of commercialization and development
The comparison
How Bristol-Myers Squibb stacks up
Compared with peers like Pfizer and Merck, Bristol-Myers Squibb operates with a relatively compact C-suite and no standalone COO. Peers often interpose a COO or presidents over major divisions, while BMS keeps functional and divisional leaders reporting directly to the CEO. This model increases CEO span but can speed …
C-suite size
Reporting depth
Avg C-suite tenure
Has COO / Has CAIO
Bristol-Myers Squibb — no COO — no CAIO
Current signals
What changed recently
The most significant change was the transition of Chief Medical Officer responsibilities from Samit Hirawat to Cristian Massacesi in August 2025.
Leadership Timeline
Year-over-year executive structure based on SEC proxy and annual filings.
FY2025
DEF 14A filed 2026-03-25
- CEO
- Christopher S. Boerner, Ph.D.
- CEO span
- 6
- C-suite
- 6
- Avg tenure
- 3 yr
Transition year with new Chief Medical Officer following Hirawat departure.
Named executive officers (5)
- Christopher S. Boerner, Ph.D. - CEO since 2023
- David V. Elkins - CFO
- Cristian Massacesi, M.D. - CMO, Head of Development since 2025
- Adam Lenkowsky - Chief Commercialization Officer
- Greg Meyers - Chief Digital and Technology Officer
FY2024
DEF 14A filed 2025-03-26
- CEO
- Christopher S. Boerner, Ph.D.
- CEO span
- 6
- C-suite
- 6
- Avg tenure
- 4 yr
Full executive team prior to CMO transition.
Named executive officers (5)
- Christopher S. Boerner, Ph.D. - CEO since 2023
- David V. Elkins - CFO
- Samit Hirawat, M.D. - CMO, Head of Development
- Sandra Leung - General Counsel
- Karin Shanahan - EVP, Global Product Development & Supply
Year-over-year changes
The key change was the replacement of the Chief Medical Officer while overall structure remained stable.
- CEO span: 6 → 6
- C-suite size: 6 → 6
- Avg tenure: 4 → 3 yr
- departed Samit Hirawat, M.D. - Chief Medical Officer (was EVP, Chief Medical Officer) (Form 8-K filed July 25, 2025)
- new Cristian Massacesi, M.D. - Chief Medical Officer (DEF 14A filed March 25, 2026)
Frequently Asked Questions
Who is the CEO of Bristol-Myers Squibb?
Christopher S. Boerner, Ph.D. has served as Board Chair and CEO since November 2023.
What type of organizational structure does Bristol-Myers Squibb use?
Bristol-Myers Squibb operates a divisional structure with strong functional leaders reporting directly to the CEO.
How many direct reports does Bristol-Myers Squibb's CEO have?
The CEO has six direct reports across finance, development, commercialization, digital, legal, and supply.
How has Bristol-Myers Squibb's leadership changed recently?
In 2025, Samit Hirawat departed as Chief Medical Officer and Cristian Massacesi was appointed as his successor.
Does Bristol-Myers Squibb have a COO?
No, Bristol-Myers Squibb does not currently have a standalone Chief Operating Officer role.
Sources
- Form 8-K, July 25, 2025
- Company Proxy Statement, Mar 2026
- SEC EDGAR: Bristol-Myers Squibb DEF 14A Proxy Statement
- SEC EDGAR: Bristol-Myers Squibb 10-K Annual Report
Reference
Cite this page
If you reference this page in research, analysis, or news writing, use one of the formats below. Citation includes the SEC filing source where applicable.
APA 7th
Creately. (2026). Bristol-Myers Squibb organizational structure. Creately. Retrieved , from https://creately.com/org-chart/fortune-500/bristol-myers-squibb/MLA 9th
"Bristol-Myers Squibb Organizational Structure." Creately, April 1, 2026, https://creately.com/org-chart/fortune-500/bristol-myers-squibb/. Accessed .Chicago 17
Creately. "Bristol-Myers Squibb Organizational Structure." Last modified April 1, 2026. https://creately.com/org-chart/fortune-500/bristol-myers-squibb/.Original SEC source View on SEC ↗
Bristol-Myers Squibb. DEF 14A. Filed 2026-03-25. U.S. Securities and Exchange Commission. https://www.sec.gov/Archives/edgar/data/14272/000001427226000006/bmy-20260325.htmPermanent URL: https://creately.com/org-chart/fortune-500/bristol-myers-squibb/ · last updated 2026-04-01