On September 25, 1996, Kevin Plank, a 24-year-old former football player, founded Under Armour from his grandmother's basement.
In 1996, Under Armour gained recognition after being featured in a USA Today photo and secured a major sale with Georgia Tech. They launched new apparel lines like ColdGear and TurfGear and achieved $17,000 in sales.
By 1997, Under Armour's orders reached $100,000, prompting Plank to find a factory in Ohio for production.
In 1999, Under Armour appeared in Warner Brothers films "Any Given Sunday" and "The Replacements," boosting brand visibility. A strategic ad in ESPN The Magazine further amplified sales.
Under Armour's product placement journey began in 1999 with the sports drama "Any Given Sunday."
Under Armour launched its Women's Performance Gear product line in 2003, expanding its market reach and catering to female athletes.
Under Armour received a $12 million investment from Rosewood Capital in 2003. The company also launched its first TV commercial, emphasizing the motto "Protect this house."
Majestic became MLB's uniform provider in 2004.
Under Armour's products were featured in the 2004 film "Friday Night Lights," further expanding their presence in Hollywood.
In November 2005, Under Armour went public on the NASDAQ, raising $153 million.
Under Armour opened its first full-line retail store in Annapolis, Maryland, in late 2007.
A 2008 study by the US Forest Service indicated that Under Armour's material might pose a higher burn injury risk compared to other undergarment materials.
The CPSC announced a voluntary recall of all Under Armour athletic cups on April 29, 2009, due to the risk of breakage and potential injury.
In 2009, Under Armour partnered with Cal Ripken Jr.'s Ripken Baseball, supplying uniforms for minor and youth leagues.
Under Armour's brand appeared in the 2009 film "The Blind Side."
Under Armour's revenue grew consistently by 30% from 2010 to 2014, demonstrating its expanding market presence and successful product strategies.
On November 3, 2011, the CPSC issued a voluntary recall of Under Armour Defender chin straps due to a laceration hazard posed by the metal snap.
From 2011 to 2012, Under Armour's shoe sales surged by 31%, reaching $239 million.
In October 2012, Under Armour launched "The Wounded Warrior" project, designing special football uniforms.
On October 27, 2012, Boston College and Maryland players wore the star-studded cleats and American-striped jerseys from Under Armour's "The Wounded Warrior" project for their football game.
On November 24, 2012, The University of Hawaii and UNLV showcased Under Armour's "The Wounded Warrior" project through special football uniforms.
In 2012, Under Armour introduced "Under Armour Scent Control," designed to make the wearer's scent undetectable.
Under Armour's products were included in the 2012 superhero film "The Dark Knight Rises."
Under Armour sponsored the Baseball Factory's "Premium Video Program" in 2012, supporting youth athlete development.
By 2012, shoes became Under Armour's fastest-growing product line, with sales hitting $239 million.
Under Armour acquired the digital app maker MapMyFitness for $150 million in November 2013.
In 2013, Under Armour added to their ColdGear line with Infrared, designed to dissipate and re-circulate heat around the wearer's body using ceramic powder, purportedly to avoid heat signatures.
In 2013, Under Armour opened its first Brand House in Baltimore.
Stephen Curry made a significant move in 2013 by leaving Nike and signing with Under Armour.
Under Armour experienced over 30% operating profit growth in 2014, building on its 2013 momentum. The company's share price surged by 62.5% that year.
Under Armour secured an endorsement deal with PGA Tour player Jordan Spieth in 2013.
Under Armour's brand was featured in the 2013 film "Lone Survivor."
On January 21, 2014, Under Armour secured a 10-year deal with the University of Notre Dame, marking the largest athletic apparel agreement in college history.
The 10-year partnership between Under Armour and the University of Notre Dame commenced on July 1, 2014.
In 2014, apparel sales made up 74.3% of Under Armour's net revenues, with footwear at 14% and accessories at 9.9%. The company achieved steady revenue growth of 30% from 2010 to 2014.
Under Armour's high-tech speedskating suits were worn by athletes at the 2014 Winter Olympics. Despite no design flaws, their performance led to negative publicity, impacting the company's stock.
In February 2015, Under Armour expanded its digital portfolio by acquiring MyFitnessPal for $475 million and Endomondo for $85 million.
Under Armour's plan to open a Fitness Performance Center in Baltimore in 2015 drew criticism for potentially covering up historic murals.
In 2015, Under Armour's products were showcased in the science fiction film "The Martian."
Under Armour recorded a 28% increase in full-year net revenues for 2015, totaling $3.96 billion, highlighting its strong financial performance during that period.
Under Armour faced scrutiny for its accounting practices in 2015 and 2016, leading to investigations and questions about its financial reporting.
Jordan Spieth triumphed in two major golf championships in 2015: The Masters and the U.S. Open.
Under Armour announced a strategic partnership with IBM on January 6, 2016, to leverage IBM Watson's cognitive computing for data analysis.
Under Armour launched a marketing campaign featuring women hunters in January 2016.
Under Armour's collaboration with Dwayne Johnson began in January 2016, marking a significant moment in the brand's marketing strategy.
Under Armour announced a 31% increase in fourth-quarter net revenues for 2015, reaching $1.17 billion, on January 28, 2016. The company also reported a positive outlook for 2016, expecting net revenues of approximately $4.95 billion.
Starting with the 2016 season, Under Armour became the official match ball partner of the North American Soccer League.
In July 2016, Under Armour leased a prime retail space on New York's Fifth Avenue, previously occupied by FAO Schwarz.
In August 2016, Under Armour faced heavy criticism after a sponsored hunter, Sarah Bowmar, posted a video of her husband spearing a bear, leading to the termination of her contract.
Under Armour secured a 10-year agreement with Major League Baseball (MLB) on December 5, 2016, to become the official uniform provider starting in 2020.
Under Armour faced scrutiny for its accounting practices in 2015 and 2016, leading to investigations and questions about its financial reporting.
On February 7, 2017, Under Armour's CEO Kevin Plank publicly voiced his support for the Trump administration.
Following backlash over Trump's response to events in Charlottesville, CEO Kevin Plank resigned from Trump's Manufacturing Jobs Initiative Council on August 14, 2017.
Jordan Spieth added another victory to his record by winning the Open Championship in 2017.
Under Armour withdrew from its MLB uniform deal in May 2018 for cost-saving measures.
A Facebook post in June 2018 alleged that Under Armour clothing was flammable and had caused burn injuries, although no recall was issued.
Under Armour secured a sneaker endorsement deal with Philadelphia 76ers center Joel Embiid on October 10, 2018.
Under Armour reported a loss of US$46 million for the fiscal year 2018, but with a 9.9% increase in revenue. Its market capitalization exceeded US$10.7 billion in November 2018.
At CES in 2018, Under Armour introduced two new models of connected running shoes equipped with Bluetooth, an accelerometer, and a gyroscope.
Nike officially became MLB's on-field uniform supplier on January 25, 2019.
Kevin Plank announced his departure as CEO in October 2019, with COO Patrik Frisk succeeding him.
News broke in November 2019 that the US Securities and Exchange Commission had been scrutinizing Under Armour's accounting policies for over two years.
Under Armour reported flat revenue of $1.43 billion in their quarterly earnings for 2019.
Originally scheduled for 2019, the opening of Under Armour's Fifth Avenue store was postponed to 2021.
Patrik Frisk took over as CEO of Under Armour in January 2020.
In July 2020, Under Armour confirmed that they had received Wells Notices from the SEC regarding their accounting practices in 2015 and 2016.
Under Armour faced scrutiny from the SEC in July 2020 over accounting practices. The company also reported a 41% revenue decline in Q2 2020 due to the COVID-19 pandemic.
In November 2020, Under Armour announced the launch of the Curry Brand, a partnership with NBA star Stephen Curry.
Under Armour was set to become MLB's on-field uniform provider in 2020, replacing Majestic.
Under Armour announced plans to sublease a portion of its Fifth Avenue store space in March 2021.
John Varvatos was appointed as Under Armour's chief design officer on September 11, 2023.
Kevin Plank returned to Under Armour as CEO on April 1, 2024, replacing Stephanie Linnartz.