G. Michael Callahan, Jr. served as the CEO of GMS Inc. from May 2015 until August 2019. He has a strong financial background, holding a B.A. in Economics from Georgia State University. Before becoming CEO, he was with GMS since...

G. Michael Callahan, Jr. served as the CEO of GMS Inc. from May 2015 until August 2019. He has a strong financial background, holding a B.A. in Economics from Georgia State University. Before becoming CEO, he was with GMS since 1993, first as Vice President of Finance and then as CFO. Under his leadership, GMS expanded significantly and saw strong performance metrics linked to financial goals like Adjusted EBITDA. In 2019, his total compensation reached over $1.9 million, which included a substantial severance and a bonus reflecting his final months at the company. Interesting insights from his insider trading show he held significant wealth in GMS stock, which peaked at around $32 million right before his departure, illustrating his strong belief in the company's growth. After stepping down, he agreed to provide consulting services during a transition period for 18 months.

Quick Links

1. Rivals

2. Holdings

3. Insider Trading

4. Compensation History

5. Other GMS CEOs

G

G. Michael Callahan, Jr.

Ex-CEO of GMS

Education

B.A. in Economics from Georgia State University

Field of Expertise

Finance & Banking - Finance

Sector of Economy

Industrials

Born

June 15, 1956 - 68 years ago

CEO of GMS for

4 years 3 months (May 2015 - Aug 2019)

Previous Experience

Senior Vice President and Group Manager at C&S National Bank and Nations Bank

Rivals

Competitors/colleagues of G. Michael Callahan, Jr.

S

Michael Olosky

CEO of Simpson Manufacturing

2023 Compensation

Stock

$0.00

Salary

$800.00K

Bonus

$1.48M

Other

$33.00K

Total Holdings

$3.12M

O

Michael H. Thaman

CEO of Owens Corning

2019 Compensation

Stock

$2.00M

Salary

$965.91K

Bonus

$282.02K

Other

$88.93K

Total Holdings

$118.49M

B

Nate Jorgensen

CEO of Boise Cascade

2023 Compensation

Stock

$0.00

Salary

$1.01M

Bonus

$2.72M

Other

$234.32K

Total Holdings

$24.42M

F

Nicholas I. Fink

CEO of Fortune Brands Innovations

2023 Compensation

Stock

$7.31M

Salary

$1.24M

Bonus

$1.97M

Other

$275.23K

Total Holdings

$19.20M

B

Julian G. Francis

CEO of Beacon Roofing Supply

2023 Compensation

Stock

$7.76M

Salary

$929.81K

Bonus

$0.00

Other

$29.67K

Total Holdings

$22.10M

T

Robert Buck

CEO of TopBuild Corporation

2023 Compensation

Stock

$2.28M

Salary

$970.83K

Bonus

$0.00

Other

$14.19K

Total Holdings

$20.86M

Holdings

See how much did G. Michael Callahan, Jr. make over time.

During his tenure as CEO of GMS Inc., Callahan’s holdings in the company peaked at approximately $32 million in November 2021. This peak demonstrates his confidence and heavy investment in GMS, reflecting his belief in the potential growth of the...

During his tenure as CEO of GMS Inc., Callahan’s holdings in the company peaked at approximately $32 million in November 2021. This peak demonstrates his confidence and heavy investment in GMS, reflecting his belief in the potential growth of the company. Post-retirement, his holdings fluctuated, reaching $28 million by early 2022 and gradually declining to about $24 million in the following months. Interestingly, the highest value he achieved was during a period when the company's market performance was strong, showcasing how executive confidence can translate into substantial personal wealth tied to company performance. Overall, his holdings have shown resilience, indicating his ongoing connection to GMS's success even after his retirement.

Mar 18, 2025

G

shares

GMS @ $72.07

Total Stock Sold

$8.30M

GMS

$8.30M

254,054 GMS shares

What if they kept their stock?

If G. Michael Callahan, Jr. didn't sell their stock, today they would have:
Extra GMS254,054 shares worth $3.77M.
This is -54.58% and $4.53M less than what they got when they sold the stock.

Insider Trading

See recent insider trades of G. Michael Callahan, Jr..

GMS

$654.62K

GMS at $22.61/share

Jul 3, 2019

Sale

GMS

$389.15K

GMS at $31.13/share

Jun 22, 2018

Sale

GMS

$366.52K

GMS at $29.32/share

May 22, 2018

Sale

GMS

$395.68K

GMS at $31.65/share

Apr 23, 2018

Sale

GMS

$3.36K

GMS at $32.00/share

Apr 19, 2018

Sale

GMS

$398.39K

GMS at $31.87/share

Mar 22, 2018

Sale

GMS

$1.12M

GMS at $33.65/share

Mar 12, 2018

Sale

GMS

$397.16K

GMS at $31.77/share

Feb 22, 2018

Sale

GMS

$1.07M

GMS at $32.17/share

Feb 12, 2018

Sale

GMS

$460.25K

GMS at $36.82/share

Jan 22, 2018

Sale

Compensation History

See how much did G. Michael Callahan, Jr. make over time.

G. Michael Callahan, Jr.'s compensation during his final year as CEO of GMS Inc. was notable, totaling $1,931,285. This included a base salary of $772,512 and a proration of a bonus of $235,616 based on his performance. However, a significant part of his compensation came from other payments totaling $1,431,903, largely due to severance benefits that included 18 months of base salary continuation and healthcare support. His total package reflects the company’s philosophy to attract and retain top talent while aligning management’s interests with that of the shareholders. While the compensation numbers are impressive, they also highlight the transition from a CEO role to retirement and the further value placed on executive experience post-retirement.

Year

2019

Total Compensation

$2.33M

Salary

$772.51K

Board Justification

The compensation philosophy of GMS Inc. is designed to attract, retain, and motivate executives to achieve the company's performance goals while aligning their interests with those of the stockholders.

Bonus

$235.62K

Board Justification

The bonus earned by Mr. Callahan was prorated based on the portion of fiscal year 2020 that he was employed with the Company, as he retired on August 2, 2019.

Other

$1.32M

Board Justification

This includes severance benefits of approximately $1,430,870, which consists of continuation of base salary for eighteen months, a pro-rata annual bonus for fiscal year 2020, and a monthly payment for health insurance coverage under COBRA.

Restricted Stock

$0.00(0 N/A)

Board Justification

No stock awards were granted to Mr. Callahan in fiscal year 2020 due to his retirement.

Performance Metrics

The performance metrics for determining Mr. Callahan's compensation included company performance against pre-established business and financial goals.

Other GMS CEOs

Here are other CEOs of GMS

John C. Turner, Jr.

CEO of GMS

August 2019 - Present