Under Armour was founded on September 25, 1996, by Kevin Plank, a then-24 year old former special teams captain of the University of Maryland football team. Plank initially began the business from his grandmother's basement in Washington, D.C. He spent his time traveling along the East Coast with nothing but apparel in the trunk of his car. His first team sale came at the end of 1996 with a $17,000 sale. From his grandmother's Washington, D.C.-area rowhouse, Plank moved to Baltimore.
People began to take notice of the brand when a front-page photo of USA Today featured Oakland Raiders quarterback Jeff George wearing an Under Armour mock turtleneck. Under Armour's first major sale came when an equipment manager from Georgia Tech requested 10 shirts from Plank. Contracts with NC State, Arizona State, and other Division I football teams followed. That year, Under Armour launched several new apparel lines including ColdGear, TurfGear, AllseasonGear, and StreetGear. By the end of 1996, Under Armour had sold 500 Under Armour HeatGear shirts, generating $17,000 for the company. In 1997, Plank had $100,000 in orders to fill and found a factory in Ohio to make the shirts.
Under Armour received its first big break in 1999 when Warner Brothers used Under Armour in two of its feature films, Oliver Stone's Any Given Sunday and The Replacements. Leveraging the release of Any Given Sunday, Plank purchased an ad in ESPN The Magazine, which generated close to $750,000 in sales.
The expansion of Under Armour's product lines, such as TurfGear, AllseasonGear, and StreetGear put Under Armour at the forefront of the emerging performance apparel industry. In 2003, Under Armour launched their Women's Performance Gear product line.
The following year, Under Armour became the outfitter of the new XFL football league. In 2003, private equity firm Rosewood Capital invested $12 million into the company. The same year, the company launched its first television commercial, which centered on their motto, "Protect this house." The company had its IPO on the NASDAQ in November 2005, raising $153m of capital. In late 2007, Under Armour opened its first full-line full-price retail location at the Westfield Annapolis mall in Annapolis, Maryland. It has since opened several specialty stores and factory outlet locations in Canada, China, and 39 states including the opening of its first Brand House in Baltimore in 2013 and second Brand House in Tyson's Corner, Virginia.
On April 29, 2009, the United States Consumer Products Safety Commission (CPSC) announced a voluntary recall of all Under Armour brand athletic cups. The cups might break when hit, posing a risk of serious injury. They were sold from January 2006 to March 2009. On November 3, 2011, the CPSC announced a voluntary recall of all Under Armour Defender chin straps. The straps pose a laceration hazard when a player contacts the metal snap. They were sold from January 2008 to September 2011.
In 2009, the company formed an alliance with Cal Ripken Jr.'s Ripken Baseball, including providing uniforms for the minor league Aberdeen IronBirds and youth teams participating in the Cal Ripken World Series.
The company produces the Speedform shoe in a Chinese bra factory. It has no insole and little stitching. Shoes are Under Armour's fastest growing product line, growing 31% from 2011 to $239 million in sales in 2012.
Under Armour announced an addition to their ColdGear product line, called Infrared, that was released in 2013. This line claims to dissipate and re-circulate heat around the wearer's body using ceramic powder. This was purportedly designed so that the wearer's heat signature will not be picked up. Under Armour also had released a product with scent control technology in 2012 titled, "Under Armour Scent Control". This line claims to be designed so that the wearer's scent cannot be detected.
Under Armour developed a new type of shirt called "Coldblack", which is designed to reflect heat and keep athletes cool in the sun. Under Armour has come out with new styles for football uniforms. In October 2012, Under Armour created "The Wounded Warrior" project for football uniforms. The University of Hawaii and Boston College wore the star-studded cleats and the American striped jerseys. They were revealed when Boston College played Maryland on October 27, 2012, also when Hawaii played UNLV on November 24, 2012.
Under Armour has a partnership with PGA Tour player Jordan Spieth who they signed an endorsement with in 2013. Spieth has won three majors to date (the 2015 Masters, the 2015 U.S. Open and the 2017 Open Championship) and has launched his own golf shoe, "Spieth One".
After its November 2013 acquisition of digital app maker MapMyFitness for US$150,000,000, in February 2015 Under Armour announced it had purchased the calorie and nutrition counting app maker MyFitnessPal for $475m, as well as the fitness app maker Endomondo for US$85,000,000.
In 2014, sales of apparel, footwear and accessories represented 74.3%, 14% and 9.9% of net revenues, respectively. Revenue has grown steadily by 30% from 2010 to 2014. As of January 28, 2016, the fourth quarter net revenues for 2015 increased 31% to $1.17 Billion while the full year net revenues increased 28% to $3.96 Billion. Based on these numbers, Under Armour has updated its 2016 net revenues outlook to approximately $4.95 Billion (+25%).
On January 21, 2014, it was announced that the University of Notre Dame and Under Armour had come to terms with providing uniforms and athletic equipment for the university. This 10-year deal was the largest of its kind in the history of college athletics and became effective July 1, 2014. As of 2014, Under Armour had an operating profit of more than 30%, accelerating from its 2013 pace. The company's share price soared 62.5% that year.
In 2015, Under Armour released plans for their new Under Armour Fitness Performance Center powered by FX Studios at the Bank of America Building at 10 Light Street in Baltimore. The Fitness Performance Center is planned to take place in the building's lobby, covering historic murals of Baltimore's history by art deco artist Hildreth Meiere with artificial turf flooring. This plan has been seen as controversial due to the fact that Kevin Plank, Nate Costa (president of FX Studios) and developer Cary Euwer used state and federal tax credits to restore the historical building, yet the historical murals are being covered up by turf flooring. Many historians and local Baltimoreans have expressed public outcry that the design should be reconsidered and the murals should be saved.
In November 2019, the U.S. Securities and Exchange Commission made public that Under Armour's accounting policies had been under scrutiny for more than two years. In July 2020, the company confirmed that the U.S. Securities and Exchange Commission had sent Wells Notices relating to Under Armour's accounting in 2015 and 2016.
In January 2016 Under Armour initiated a marketing campaign featuring women hunters including an American woman named Sarah Bowmar. In August 2016 a video filmed by Bowmar, showing her husband spearing a bear and then rejoicing that he had hit it, went viral. The bear was found dead the next day. Under Armour was heavily criticized worldwide and as result, the company ended its contract with Bowmar a few days after the video became known.
Under Armour promotes its products by sponsorship agreements with athletes, celebrities, and sports teams, a field in which it competes with other sports apparel companies. One of its most fiscally beneficial marketing strategies has been its collaboration with actor Dwayne Johnson, who has endorsed the company since January 2016.
On January 6, 2016, Under Armour announced a strategic partnership with IBM to use IBM Watson's cognitive computing technology to provide meaningful data from its IOT kit and UA Record app.
On March 3, 2016, the company became the Official Match Ball Partner of the North American Soccer League, starting with their 2016 season. In May, Under Armour and UCLA announced plans for a 15-year, $280 million contract, making this the largest shoe and apparel sponsorship in NCAA history.
In July 2016, Under Armour leased the 53,000-square-foot (4,900 m ) space formerly occupied by FAO Schwarz on New York's Fifth Avenue. FAO Schwarz had been paying $20 million in rent. The store's opening, originally planned for 2019, was pushed back to 2021. Under Armour then announced in March 2021 that it was planning on subleasing approximately half of the overall space.
On December 5, 2016, Under Armour reached a 10-year agreement with Major League Baseball (MLB) to become its official on-field uniform provider beginning in 2020. Under Armour will replace Majestic, who has been MLB's uniform provider since 2004. However, in May 2018, it was reported that Under Armour would be backing out of the deal with MLB, in order to save the company around $50 million. Nike would instead become the on-field uniform supplier of the league. MLB's deal with Nike became official on January 25, 2019.
On February 7, 2017, two weeks into the presidency of Donald Trump, CEO Kevin Plank expressed his support for the administration and its friendliness to corporations.
On August 14, 2017, Plank removed himself from Trump's Manufacturing Jobs Initiative Council, following backlash over Trump's response to the events in Charlottesville, Virginia.
In 2018, Under Armour launched two new pairs of connected running shoes at CES. Inside each shoe is a Bluetooth module, accelerometer and gyroscope.
In June 2018 a Facebook post emerged stating that Under Armour clothing was flammable and resulted in severe burn injuries to a child. Though no recall was issued and no evidence suggests the brand's items were not in compliance with federal regulations, a 2008 study by the United States Forest Service found that Under Armour's material was more likely to result in a burn injury of the wearer than most other undergarment materials.
On October 10, 2018, Under Armour announced that it has signed Philadelphia 76ers center Joel Embiid to a sneaker endorsement deal.
For the fiscal year 2018, Under Armour reported losses of US$46 million, with annual revenue of US$4.977 billion, an increase of 9.9% over the previous fiscal cycle. Under Armour's market capitalization was valued at over US$10.7 billion in November 2018.
In October 2019, Kevin Plank announced he would be stepping down by 2020, and COO Patrik Frisk would succeed him as CEO in January 2020. In July 2020, the company received Wells Notices from the U.S. Securities and Exchange Commission, Mr. Plank the Under Armour's CEO, David Bergman. The notices are the result of its accounting revelations for the years 2015 and 2016 and "pull forward" sales for the same period. The same month, the company reported revenue decline of 41% for the Q2 of 2020 or $707.6 million. As a result of the COVID-19 pandemic, Under Armour had to close its physical stores earlier that same year. Despite the revenue decline, it still fared better than the analytic predictions, which had previously estimated profits of $541 million in sales for Q2.
In November 2020, Under Armour announced a new brand in partnership with NBA star Stephen Curry called the Curry Brand. The launch follows Under Armour's quarterly earnings, resulting in $1.43 billion in revenue, which was flat in comparison to 2019.
Effective September 11, 2023, Under Armour appointment of John Varvatos to the position of chief design officer.
Effective April 1, 2024 Kevin Plank returns to company as CEO. He will replace Stephanie Linnartz who served in this position a little more than a year.