After her husband died in 2009, Miller assumed control of their businesses (LHMCO), which then consisted of 54 car dealerships, a movie theater chain, and the Utah Jazz.

[2] In October 2020, the Miller family agreed to sell the Jazz and Vivint Arena to Ryan Smith, founder of Qualtrics, for $1.66 billion.

[14] In early 2023, Miller, her family, and the LHM Company started an effort to bring an MLB team to Salt Lake City.

A "shovel ready" site in the Rocky Mountain Power District in west Salt Lake City has been identified to build a stadium.

[16] In early 2023, the LHMCO purchased billboards reading "Utah wants the A's" around Salt Lake City while representatives of the team were visiting to meet with the company.

Zions Bank President Scott Anderson, Vivint Smart Home founder Todd Pedersen, and Salt Lake Chamber CEO Derek Miller sit on the community advisory board.

In the same announcement, Big League Utah said that it would form a foundation to address the needs of the people and businesses that occupy the area near the proposed stadium.

LHMCO worked closely with the Utah State Fairpark board, Salt Lake City, the Jordan River Commission, and other policymakers to ensure compliance with land use planning.

[23] This franchise dates from 1994, when Joe Buzas, a former major league player and the owner of the PCL Portland Beavers, moved the team to Salt Lake City.

The new ballpark, Franklin Quest Field, opened in 1994 with the renamed Salt Lake Buzz drawing 713,224 fans to home games during their inaugural season—breaking the PCL single-season attendance record that had stood for 48 years.

Savory Fund, along with Swig founder Nicole Tanner, and partners Chase Wardrop and Dylan Roede, maintained substantial minority equity in the chain.

[35] In early 2025, the Miller family foundation partnered with Proxima to help people facing barriers to entering healthcare careers receive proper training.

[36] In 2021, the LHM Group's real estate subsidiary acquired the remaining 1,300 acres undeveloped of land and numerous buildings in Daybreak, a mixed-use development in South Jordan in Salt Lake County.

[38] In March 2022, it was reported that LLCs controlled by LHM Real Estate had purchased 950 acres in Richardson Flat in unincorporated Summit County.

[43] Reyclops started by servicing apartment buildings and the shifted its focus to sing-family houses in cities lacking recycling facilities and programs.

[54] In 2000, Brigham Young University (BYU) announced that the Millers had made a significant financial contribution towards the new 4,000-seat, $7 million baseball and softball complex.

This program, which is also funded by Zions Bank, takes primary and secondary school history teachers on trips to historic sites throughout the United States.

[59] In March 2022, the Miller family donated $2.1 million from their foundation to Southern Utah University (SUU) to support its Entrepreneurship Center.

Among other projects, the center offers education on the United States Constitution to the university as well as primary and secondary schools in Utah.

[71] Miller donated $50 million to Intermountain Healthcare (IHC), a non-profit group of hospitals and clinics that serves children in Utah, Wyoming, Montana, Idaho, Nevada, and Alaska.

[77] For Thanksgiving in 2022, the Larry H. and Gail Miller Family Foundation, the LHM Company, and local governments worked together with non-profits to provide about 3,000 meals and many other services at the [Salt Palace|Salt Palace Convention Center].

[82] In January 2024, the Utah Food Bank opened a new distribution center in Springville that was partially funded by a donation from the Miller family foundation.

[84] In 2024, Miller, through her family foundation, made a matching grant of $850,000 to Southern Utah University to fund mental health services.

[86] The Miller family foundation donated to support the construction of transitional housing for victims of domestic and sexual violence in Ogden, Utah.

[88] The Miller family foundation set up the Westside Community Grant program in late 2024 to assist non-profits offering social services on Salt Lake City's west side.

[94] In late 2023, the Miller family foundation funded renovations to baseball fields at Riverside Park in partnership with Salt Lake City.

[96] In February 2024, the Miller family foundation announced a $2.2 million donation to support water conservation efforts through the Antelope Island Learning Center.

[97] In late 2024, the Miller family foundation announced a donation of $25 million to Salt Lake County to fund a regional arts center to be constructed in South Jordan.

[111] In late 2024, the Larry H. & Gail Miller Family Foundation received the Haven J. Barlow Legacy Award from Davis Technical College.

[112] In 2013, Miller partnered with former Utah Governor Mike Leavitt and former First Lady Norma Matheson to create "Count My Vote," a bipartisan effort to push for state electoral reform.