The company purchased the Martin's chain, based in Hagerstown, Maryland, in 1969, and expanded to New Jersey in 1970, opening three stores under the name Clover-Markets.

[5][6] In 1981, the Javitch family sold the company to Royal Ahold Corporation, a food retailing business based in Zaandam, the Netherlands.

In addition, many new customer conveniences were added including in-store banks, pharmacies, Chinese kitchens, coffee shops, photo processing, and dry cleaning services.

In addition, the first new prototype store opened in Hellertown, Pennsylvania and additional new stores opened with shopping conveniences for customers including gas stations, full-service floral departments, smoothie and juice bars, expanded deli and bakery departments, and organic produce.

The new millennium brought about additional change within the organization, as Edwards transitioned to another Ahold-owned company, Stop & Shop.

With the major change, Giant concentrated on its plans to expand, and opened stores in new market areas such as Altoona, Pennsylvania.

The new partnership, called Shared Services, was designed to allow both companies to continue to operate individually as separate and distinct businesses while partnering to support corporate functions.

[15] On January 5, 2012, Giant announced it would acquire 16 Genuardi's Family Markets across the Philadelphia area in a $106 million deal.

[17][18] In November 2018, Giant-Carlisle announced that it would acquire 5 Shop 'n Save supermarkets from SuperValu, Inc. and operate them under its Martin's Food Markets banner.

The first Giant Heirloom Market location opened on January 25, 2019, in the Graduate Hospital neighborhood in Philadelphia.

[24] Giant Heirloom Market has also opened locations in the Philadelphia neighborhoods of University City and Northern Liberties.

[26] In August 2019, Giant announced it would open a two-story, 65,000-square-foot (6,000 m2) flagship store in Center City Philadelphia as part of the Riverwalk development along the Schuylkill River.

The store, which features dedicated shelf space for local vendors, an outdoor terrace, and a free parking garage, opened on March 19, 2021.

[27][28] In February 2019, the company launched its first e-commerce hub Giant Direct brand for online pickup and delivery orders.

[30] In August 2020, following the re-branding campaign, the company introduced a new slogan "For Today's Table", with the focus on family values.

[31] According to a number of sources, the grocery chain had temporarily to limit some of the vital products in the beginning of the COVID-19 pandemic but over time resumed back to normal practice.

Among other measures were reserved shopping time for customers age 60 and older, changing store hours and contactless delivery for online grocery orders through Giant/Martin’s Direct.

[32][33][34] In March 2021, Glennis Harris joined The Giant Company as senior vice president of customer experience.

On December 16, 2021, a Giant Heirloom Market location opened in the ground level of the former Strawbridge & Clothier flagship department store at the Fashion District Philadelphia.

In 1998, when Ahold purchased Giant-Landover, some Martin's stores were closed and sold to other chains to comply with Federal Trade Commission regulations.

These locations included stores in Frederick, Carroll, Harford and Cecil counties in Maryland, where the Giant of Landover name was seen as more dominant.

With the purchase of Ukrops Super Markets, Martin's moved even farther into central Virginia, with stores as far south as Petersburg and as far east as Williamsburg.

Among the notable differences in the Richmond and Williamsburg stores were that they maintained the Ukrops recipes and brand in the bakery and prepared foods departments, and associates usually carried customers' groceries to their vehicles.

Martin's exited the Richmond metropolitan area in 2017, closing some stores and selling the remainder to Publix Super Markets.

[49][50] The Giant Company has been engaged in other charity endeavors such as the Please Touch Museum, the Children’s Hospital of Philadelphia and more.

[55] In January 2022, Giant donated $1 million to Pennsylvania's Harrisburg University of Science and Technology to fund its 23,000-square-foot Research and Education Center for Advanced Agriculture and Sustainability.

[56] The grocery chain also has a long-term philanthropic relationship with the Pennsylvania State University and supports the university's various associated projects, including Penn State Health Children's Hospital, the Milton S. Hershey Medical Center and Children's Miracle Network (CMN).