Timothy Matlack Warren Sr., chairman of real estate industry tracker The Warren Group and a 1945 graduate of Bowdoin College, died Dec. 21 at his Topsham home.

Warren, 89, passed peacefully, surrounded by his wife of 66 years, Phyllis, and family.

Son Timothy M. Warren Jr., the company’s chief executive officer, said his father’s passing has left the family broken hearted but proud of a glorious and happy life of service and accomplishment.

A memorial service will be held Friday, Jan. 4, at the First Parish in Concord, Mass.

The elder Warren led an active life in business, community service and spiritual service. He was diagnosed in January with a progressive blood disorder, myelodysplastic syndrome.

“I’ve never met anybody with more integrity than him,” said Alan Pasnik, business analyst at The Warren Group who worked under Warren for 40 years. “He was the most gracious, people-loving person I ever met.”

The Warrens moved to Topsham in order to be closer to health care — and to Bowdoin, Pasnik said. Despite declining mobility this year, Warren enjoyed a good quality of life in his final months, spending Thanksgiving dinner with family, including his great-grandchildren in Camden.

Born in New Canaan, Conn., Warren later lived in Lovell and graduated from Fryeburg Academy.

He spent his adult life in Concord and eventually took over his great grandfather’s business.

Warren was lauded for his actions that set the publishing company bearing his name onto stable financial footing and turned the flagship publication Banker & Tradesman into a powerhouse. He insisted on a level of quality and forward-thinking that helped reshape the information available to the real estate community.

“He was a visionary,” said Steve Sousa, president of the Massachusetts Board of Real Estate Appraisers and a former Warren Group vice president. “He built an incredible organization, and he knew what he needed to do to secure the future.”

Warren also was an integral part of the Concord community. He sang bass and was a trustee at First Parish Church, and served the Concord Free Public Library and the performing arts community. He and Phyllis Warren were named Concord Honored Citizens of 1995.

The Warren Group employs around 50 people, Pasnik said. One of them worked there for 72 years.

“He made everybody feel special,” Pasnik said. “He talked to everybody who worked for him.”

Timothy and Phyllis Faber Warren had three children, Timothy Matlack Warren, Jr. of Cambridge; Elizabeth Faulkner Warren-White of South Freeport; and Peter Grenelle Warren of Camden.

lgrard@timesrecord.com