The Sweat-Soaked Shirt That Started a War
In the summer of 2015, Kevin Plank stood at the apex of something improbable. Under Armour had just surpassed Adidas to become the second-largest sportswear brand in the United States by revenue — a company founded nineteen years earlier in a Georgetown row house basement, by a twenty-three-year-old walk-on football player whose original business plan amounted to a single moisture-wicking T-shirt and a Rolodex of former teammates. Revenue had grown more than 20% every quarter for more than five consecutive years. The stock had quintupled from its 2012 lows. Plank was spending nearly $700 million acquiring fitness apps, telling anyone who would listen that Under Armour was becoming a technology company. Nike, the $30 billion colossus in Beaverton, was the only thing left to chase.
Within three years, the growth machine would crack. Within five, Plank would step down as CEO. Within eight, he'd be back — having watched two successors fail to fix what he'd broken — staring at a company with roughly the same revenue it had in 2017, a stock price down more than 90% from its peak, and a brand identity that retail analysts charitably described as "muddled." The trajectory from underdog to overreach to humbled return is among the most instructive in modern consumer brands, a case study in how founder-driven intensity can build extraordinary momentum and then, without the architecture to sustain it, devour itself.
The paradox at the center of Under Armour is that the very qualities that made it remarkable — a founder's manic energy, a football-bred obsession with winning, a willingness to bet everything on the next offensive play — are also the qualities that made its decline almost inevitable. This is a company that understood performance but not patience, that could charge a hill but never figured out how to hold ground.
By the Numbers
Under Armour at a Glance
$5.2BPeak annual revenue (FY2023, fiscal year ending March 2024)
~$5.7BRevenue FY2024 (fiscal year ending March 2025)
$13.00IPO price per share (November 2005)
$53+All-time high share price (September 2015)
~$7Share price (mid-2025)
28,000+Employees worldwide
~2,000Branded retail stores globally
65%Apparel's share of total revenue
The Grandmother's Basement and the Gospel of Sweat
Kevin Plank is the youngest of five brothers, raised in Kensington, Maryland, by a father who developed land and a mother who was the town's mayor. He played football — not brilliantly, but with the compensatory ferocity of the undersized. A walk-on at the University of Maryland, Plank earned a spot on the roster through what he would later describe as a "massive chip on my shoulder." He was the kind of player who notices what's wrong with equipment before noticing what's wrong with his own technique, which is how the company began: Plank hated his undershirt. The cotton T-shirts he wore beneath his pads absorbed sweat, grew heavy, clung to his body, and never dried. He started experimenting with synthetic fabrics — the kind used in compression shorts and women's undergarments — cutting and sewing prototypes that wicked moisture away from the skin.
The founding mythology is well-worn but worth examining for what it reveals about the company's DNA. Plank launched with approximately $15,000 in savings, sewing shirts on the third floor of his grandmother's Georgetown row house, driving them around to former teammates who'd gone pro. The distribution strategy was literally a duffel bag and a car. By the end of 1996, he'd sold 500 HeatGear shirts for about $17,000 in revenue. The product worked. The question was whether anyone beyond Plank's personal network cared.
What separated Plank from a thousand other ex-athletes with product ideas was not the shirt — synthetic performance fabrics existed — but the salesmanship, and more specifically, the understanding that in sportswear, the product is inseparable from the story told about the product. Plank grasped instinctively what
Phil Knight had spent decades building at Nike: that athletic apparel is an identity purchase. The shirt doesn't just wick sweat. It tells the wearer they are the kind of person who generates enough sweat to need a shirt that wicks it.
When I began, it was just meant to be the world's greatest undershirt, just for football players, and quickly I found out it worked for baseball players, and lacrosse players, and the girlfriends of lacrosse players.
The $25,000 Bet That Bought a [Brand](/mental-models/brand)
The first inflection point came in late 1999, and it was pure founder audacity. Under Armour was still a tiny operation — a few million in revenue, running lean, barely solvent. Plank scraped together $25,000 for a single full-page advertisement in ESPN The Magazine. The ad generated approximately $1 million in direct sales. Entire athletic departments started calling. The compression shirt, previously a locker-room curiosity, became a category.
This was not a calculated media buy. It was the kind of bet you make when you're playing with money you can't afford to lose, which is to say, it was the bet of a person who doesn't fully distinguish between confidence and recklessness. Plank has told the story of nearly going broke multiple times in Under Armour's early years — at one point taking his last $2,000 to Atlantic City, though the details of that particular episode remain charmingly vague. The pattern would repeat: bet everything, survive, bet again. It worked spectacularly until it didn't.
The ESPN ad did something more than generate revenue. It established Under Armour's positioning in the market — not as a fashion brand, not as a lifestyle brand, but as a performance brand. The customers who responded to that ad were coaches, equipment managers, serious athletes. This was gear for people who trained. The brand's eventual tagline, "Protect This House," and later "I Will," reinforced the ethos: martial, driven, no-nonsense. In a market dominated by Nike's aspirational cool and Adidas's European style, Under Armour carved space as the brand for the athlete who doesn't care about looking good — who cares about working.
The Hollywood pipeline helped. Jamie Foxx wore Under Armour in Any Given Sunday (1999), Oliver Stone's football drama, and the placement was not accidental. Plank understood product placement before the industry had formalized it as a marketing channel. When Friday Night Lights dressed Coach Taylor's team in Under Armour uniforms, when military personnel started wearing the gear under body armor (the brand name suddenly acquiring a dual resonance), the company's identity hardened into something distinctive: Under Armour was what serious people wore when serious things needed doing.
Key milestones in Under Armour's early trajectory
1996Kevin Plank founds Under Armour from his grandmother's Georgetown basement. Sells 500 HeatGear shirts for $17,000.
1999$25,000 ESPN Magazine ad generates ~$1 million in direct sales. Teams begin ordering in bulk.
2003Revenue reaches approximately $115 million. Category expansion into ColdGear and LooseGear lines.
2005IPO on November 18 at $13/share. First U.S.-based IPO in five years to double on its first day of trading. Raises ~$115 million.
2006Secondary offering at $34/share. Plank retains 80.3% of voting power via Class B stock.
2010Annual revenue crosses $1 billion for the first time.
The Architecture of the Underdog
Under Armour's rise from 2005 to 2015 is a masterclass in challenger brand strategy — and in the specific advantages of being the insurgent in a market with entrenched incumbents. The playbook was not complicated. It was relentless.
First, own a category the incumbents overlooked. Nike and Adidas dominated footwear and general athletic apparel. Neither had invested meaningfully in performance base layers — the compression shirts, leggings, and technical underwear that athletes wore closest to their skin. Under Armour made this category its beachhead. By the time competitors noticed, the brand was synonymous with it. The company's S-1 filing in 2005 cited SportsScanINFO data showing Under Armour's dominance in compression-style clothing, a market segment that barely existed before Plank created it.
Second, target young athletes ascending, not established stars descending. Where Nike paid hundreds of millions for LeBron James, Under Armour signed athletes early — before their market value fully inflated. The strategy required judgment about character as much as talent. When Under Armour signed a nineteen-year-old golfer named Jordan Spieth, Ryan Kuehl, the company's VP of sports marketing, noted simply that Spieth "was mature beyond his years." The Steph Curry signing in 2013 — after Nike reportedly fumbled the meeting by mispronouncing his name and showing a presentation with Kevin Durant's name still on the slides — became the single most consequential endorsement deal in the company's history. Curry's rise from overlooked draft pick to unanimous
MVP perfectly mirrored Under Armour's brand narrative: the underdog who outworks everyone.
Third, speak to the athlete's identity, not their aspiration. Nike's "Just Do It" is universal, aspirational, almost philosophical. Under Armour's "I Will" and "Protect This House" are specific, aggressive, and rooted in the competitive mindset of team sports. The tagline gives permission to fail, as one marketing analyst noted — it implies persistence, the grind, the willingness to come back after a loss. This resonated with millennials and Gen Z athletes in ways that Nike's more polished messaging sometimes didn't.
The result was extraordinary growth. Revenue doubled from $1 billion in 2010 to $2 billion by 2013, then hit $3 billion in 2014. By 2015, Under Armour's U.S. sales of footwear and apparel totaled $2.6 billion in the eleven months through January 3, compared with Adidas's $1.6 billion. The former walk-on had, by sheer force of will and salesmanship, built the third-largest sportswear brand on the planet.
There will be moments that you will be alone, there are moments that you will be challenged, there will be moments you feel like you made the wrong decision. The only one who can make the best decision for your company is you.
The Sochi Problem, or Why Stories Are Fragile
The first crack in the armor — an irresistible metaphor that Under Armour's PR team surely grew tired of — appeared not in a boardroom but on a speed-skating oval in Sochi, Russia, in February 2014. The U.S. speed-skating team, outfitted in Under Armour suits developed in collaboration with Lockheed Martin at a cost exceeding $1 million, performed terribly. Athletes and commentators openly questioned whether the suits were the problem. Under Armour's CEO called the accusation a "witch hunt" while carefully avoiding any criticism of the skaters themselves.
Plank understood, as the New Yorker's profile of him that March documented, that there was no functional connection between the drag reduction of a speed-skating suit and the quality of a retail compression shirt. But he also understood that customers might confuse the two — "in fact, the company had spent years and more than a million dollars on the suit in the expectation that they would." This is the paradox of performance branding: you build the brand by associating it with elite athletic performance, but the association is a double-edged blade. When the performance falters, the brand absorbs the failure.
The Sochi incident was manageable. What it revealed was structural. Under Armour's brand was built on a story — the underdog, the harder worker, the athlete who earns it — and stories require constant reinforcement. Nike had decades of accumulated brand equity, a swoosh so ubiquitous it transcended any individual product failure. Under Armour's brand, younger and narrower, was more vulnerable to narrative disruption. Every bet on performance had to pay off, because the brand couldn't absorb many losses.
The Connected Athlete and the $710 Million Detour
By 2013, Plank had convinced himself that Under Armour's future lay in technology. The thesis was seductive: if the company could own the data layer between athletes and their bodies, it would create a moat that no amount of marketing spending could replicate. Between 2013 and 2015, Under Armour spent approximately $710 million acquiring three fitness-tracking platforms — MapMyFitness, MyFitnessPal, and Endomondo. The combined user base exceeded 150 million registered accounts.
At CES in January 2016, Under Armour unveiled HealthBox, a suite of connected devices — a scale, a wristband, and a chest-strap heart-rate monitor — developed in partnership with HTC. Plank's rhetoric reached Silicon Valley pitch-deck levels of ambition. "What are we gonna do if Apple decides they're going to make a shirt, or they're going to make a shoe, and more importantly, why don't we beat them to it?" he asked Fortune in February 2016. He talked about "biometric measurement" and "an understanding of self" as one of the "waves of the future."
The vision was not stupid. It was premature, and it was wrong about who Under Armour's competitors actually were. Apple did not, in fact, make a shirt. But Fitbit, Garmin, and eventually Apple Watch captured the consumer wearables market with dedicated hardware ecosystems and billions in R&D. Under Armour's fitness apps, while popular, generated negligible revenue relative to their acquisition cost. MyFitnessPal, the largest acquisition at $475 million, would eventually be sold to Francisco Partners in 2020 for a reported $345 million — a $130 million loss on a bet that had consumed an enormous amount of management attention during the company's most critical growth years.
The tech acquisitions exposed a recurring vulnerability in founder-led companies: the founder's conviction, the same force that creates the company, can also drive it into adjacencies where the company has no structural advantage. Plank was right that data would matter in the future of fitness. He was wrong that a sportswear company was the entity best positioned to own it. Nike had tried something similar with its FuelBand, launched in 2012, then shuttered the hardware division in 2014 — a retreat that, in retrospect, looks like wisdom rather than failure.
What are we gonna do if Apple decides they're going to make a shirt, or they're going to make a shoe, and more importantly, why don't we beat them to it?
Footwear, Women, and the Limits of a Football Brand
Under Armour's other major strategic bet during its growth era was footwear, which by 2016 was generating over $1 billion in annual revenue — a remarkable achievement for a company that had entered the category less than a decade earlier. But footwear was also where the limitations of the brand became starkest.
In apparel, Under Armour could win on function. A compression shirt either wicks moisture or it doesn't. In footwear, function is necessary but insufficient — shoes carry cultural weight, fashion significance, and emotional resonance that apparel rarely matches. Nike had spent forty years and billions of dollars building a footwear brand that operated simultaneously as performance equipment and cultural artifact. Under Armour's shoes were fine. They were not objects of desire.
The Curry signature line was the exception that proved the rule. When Steph Curry won his first MVP in 2015, the Curry One became a genuine phenomenon, selling out across retailers. But when Under Armour released the Curry Two Low — a bland white sneaker that the internet mercilessly compared to a "nurse's shoe" — the mockery was devastating. A meme is not a business strategy, but the episode crystallized something important: Under Armour's design capabilities lagged its marketing ambition. The company could find the right athletes. It couldn't consistently give them the right product.
Women presented a related challenge. Under Armour's founding DNA was football — masculine, aggressive, sweat-drenched. More than 70% of its revenue came from apparel, and the overwhelming majority of that was men's. By 2016, the company was aggressively courting female consumers, launching a "I Will What I Want" campaign featuring Misty Copeland, the American Ballet Theatre soloist, and Gisele Bündchen. The campaign won awards and went viral, but translating cultural relevance into sustained purchasing behavior proved harder. A deal with Kohl's, announced in July 2016, was designed to put Under Armour in front of the suburban mothers who shopped the chain's 1,160 stores. "The female consumer is there, she's shopping and she's buying," Plank told investors. "We think there is a big opportunity."
The Kohl's deal represented a broader tension that would eventually tear the growth model apart: the conflict between premium brand positioning and mass distribution. Under Armour's identity was built on performance authenticity — the serious athlete, the elite competitor. But growth requires volume, and volume requires doors. By 2016, Under Armour was sold at roughly 11,000 stores in North America. Each additional door diluted the brand's premium positioning. Each markdown at a department store eroded the perception that Under Armour was different from the commodity activewear already on those shelves.
The Streak Breaks
In the fall of 2016, twenty-six consecutive quarters of 20%-plus revenue growth came to an end. The company guided to mid-single-digit growth for Q4 — a catastrophic deceleration for a stock priced for hypergrowth. The market cap, which had peaked above $20 billion in September 2015, began a long descent.
What killed the streak was not a single event but a confluence of structural pressures that had been building for years. The Sports Authority, a major wholesale partner, went bankrupt in 2016, wiping out a meaningful revenue channel. The broader shift from mall-based retail to direct-to-consumer commerce punished brands like Under Armour that were over-indexed to wholesale. The tech investments were consuming cash and attention without generating returns. And the competitive landscape was intensifying — not just from Nike, which was executing its own direct-to-consumer transformation with far greater resources, but from a new generation of challenger brands that hadn't existed when Under Armour was founded.
Lululemon had captured the women's activewear market with a community-driven retail model that Under Armour couldn't replicate. On Running and Hoka were beginning their ascent in the running category with superior product and design. The sportswear market, which in 2020 would see Nike, Adidas, Puma, Under Armour, and Vans control 80% of share, was fragmenting. By the mid-2020s, that collective share would fall to 65%, with challenger brands growing revenue at an average annual rate of 29% compared to the incumbents' 8%.
Under Armour was caught in the worst possible position: too big to be a scrappy insurgent, too small to compete on Nike's terms, and lacking the product differentiation or cultural cachet to fend off the challengers. The football brand that had built itself as the hardest-working company in the room discovered that working harder was not the same as working smarter.
The SEC, the Succession, and the Spiral
In May 2021, the Securities and Exchange Commission charged Under Armour with misleading investors about its revenue practices. The company, without admitting or denying findings, agreed to pay a $9 million civil penalty. The SEC's order described how Under Armour had "pulled forward" approximately $408 million in existing orders — asking wholesale customers to accept earlier shipments — across six consecutive quarters to meet internal revenue targets and analyst expectations. The quarter-to-quarter timing games had helped maintain the illusion of the growth streak even as organic demand softened.
The SEC action cast a harsh retrospective light on the growth era. Not all of those twenty-six consecutive quarters of 20%-plus growth were what they appeared. The revelation damaged trust with investors and added another layer of institutional trauma to a company already struggling to find its footing.
By this point, Plank had already stepped down as CEO. In January 2020, he handed the reins to Patrik Frisk, a Swedish-born executive who'd previously held senior roles at Aldo Group and The North Face. Frisk's mandate was to stabilize: rationalize the wholesale distribution, build the direct-to-consumer business, and restore brand discipline. He announced plans to exit 2,000 to 3,000 wholesale partner stores, noting that "the way we think about our distribution model is really through the eyes of the consumer." The strategy was sound. Execution was interrupted by the pandemic, which devastated retail broadly and Under Armour specifically — 2020 revenue fell to approximately $4.5 billion, down from $5.3 billion in 2019.
Frisk departed in June 2022 after roughly two and a half years. His successor, Stephanie Linnartz, was a surprise hire — a veteran Marriott International executive with no sportswear experience. She lasted barely a year, from February 2023 to April 2024, before Plank returned as CEO. The revolving door was brutal: three CEOs in four years, each arriving with a turnaround plan that never had time to materialize. As Wedbush Securities analyst Tom Nikic wrote in a note to investors: "The game of 'musical chairs' in the CEO seat brings a layer of inconsistency and uncertainty to the story that investors don't really want to see."
Through it all, one constant persisted: CFO David Bergman, who'd joined the company nearly two decades earlier and became CFO in 2017. Nikic's assessment was telling: "Under Armour has had a lot of problems over the years, but I don't think Dave's been one of them." Bergman had moved the company from a leveraged balance sheet to a net cash position, tightened inventory management, and provided what little institutional continuity existed. But a good CFO cannot substitute for strategic clarity. "What I think all the CEO turnover has shown," Nikic added, "is that Kevin Plank is going to win any and all battles against other executives at the company."
The Founder Returns
On April 1, 2024, Kevin Plank walked back into the CEO office he'd vacated four years earlier. He was fifty-one now, the father of two adult children, the operator of a whiskey business and a Baltimore real estate development portfolio. He described the period of his absence as an "anti-founder" era — a characterization that revealed both his grievance and his self-conception.
The company he returned to was, by his own description, "a $5 billion start-up." Revenue had stagnated. The brand was diffuse. The product line was bloated. The stock was trading in single digits, down from a peak above $53. But the infrastructure was real: 24,000-plus points of distribution, approximately 2,000 branded stores worldwide, and a global supply chain that, whatever its inefficiencies, could manufacture and distribute product at scale.
Plank moved fast. He hired Yassine Saidi, who'd worked at Adidas and Puma, as chief product officer. He brought in Eric Liedtke, a former Adidas and Reebok executive, as EVP of brand strategy. He appointed John Varvatos — the menswear designer known for rock-and-roll aesthetics, not activewear — as chief design officer, an unorthodox pairing that signaled intent to elevate the brand's style quotient. Varvatos, who'd consulted for the company since spring 2023, noted that his background included fifteen years with Converse and experience at Polo Sport and RLX during his
Ralph Lauren years. "I really got into the weeds and fell in love with the company," he said.
The strategy Plank outlined at an investor conference in late 2024 had three pillars: dramatically reduce promotions and SKU count, increase marketing spend to $500 million, and return to the brand's underdog identity. "Let the baggage go," he said. The turnaround, he warned, would take until fall 2025 to show up on the bottom line.
As a global sports house — capable of equipping athletes head-to-toe on and off the field, pitch or court — we are hard at work putting in place the people, structures and strategies essential to realizing Under Armour's full potential over the long term.
In a 2025 interview, Plank articulated his management philosophy with characteristic bluntness. He believes micromanagement is "totally underestimated" — "there's too much loss on pretense or structure or process." He described an 80/20 rule: 80–90% of the business structured and set, with 10–20% reserved for speed and creativity, the ability to get product to market in six to nine months instead of eighteen. It was the same founder intensity that had built the company in the first place, now applied to a far more complex organism.
The Women's Problem That Won't Go Away
In 2025, Under Armour launched the Courtside Collection — a women's line of approximately fourteen pieces, ranging from a $90 bralette to a $245 bomber jacket, designed to bridge performance and lifestyle. "When we started designing this collection, we thought about her first — who she is, how she moves, and what excites her," said Meagan Baker, VP of apparel and accessories design. The collection was explicitly inspired by the surging cultural moment of women's sports, the WNBA's rising profile, and what Baker called "the resurgence of style of the female athlete."
This is Under Armour's fourth or fifth serious attempt to crack the women's market — a number that itself tells the story. The women's performance sports apparel market was valued at more than $42 billion in 2023 and is forecast to reach nearly $50 billion by 2027. Nike's partnership with Kim Kardashian's Skims brand, launched in 2025, represented the kind of cultural-commercial fusion that Under Armour has struggled to achieve. Lululemon, Alo Yoga, and a dozen challenger brands own the aesthetic space where function meets fashion for female consumers.
Under Armour's challenge is not that it makes bad women's product. It's that the brand's identity — forged in football locker rooms, marketed through male athletes, built on an ethos of grinding intensity — does not naturally extend to the female consumer in the way that Lululemon's community-driven, yoga-rooted identity does. Rebranding is not a marketing problem. It's a structural one.
The Map of What Remains
Under Armour's headquarters still occupies a former Procter & Gamble factory complex on the Baltimore waterfront — ten acres of converted warehouses bisected by an active railroad. From Plank's office window, three repurposed molasses-storage tanks bear giant portraits of
Michael Phelps, Cal Ripken Jr., and Ray Lewis. The tanks are an apt metaphor for the company itself: industrial vessels repurposed for storytelling.
The Stephen Curry brand, now operating as Curry Brand within Under Armour, remains the company's most valuable franchise — the proof that when athlete and brand identity align perfectly, the results can be extraordinary. Curry's $500 million equity deal, signed in 2020, gives him ownership stakes and a partnership structure that goes beyond a traditional endorsement. His signature shoes sell. His foundation work amplifies the brand's values. He is, at sixty-something and counting, the single best bet Under Armour ever made.
But one athlete, however transcendent, cannot be a brand strategy. The UA Next All-America Game — hosted at Oriole Park at Camden Yards, scouting the nation's top high school football players — represents the pipeline play, the attempt to be the brand that discovers talent before it becomes expensive. The college deals (Notre Dame, reportedly worth around $90 million over ten years, was signed in 2014) represent the institutional infrastructure. The question is whether these investments compound into cultural relevance or merely maintain a declining share of an expanding market.
Plank told WWD that this is Under Armour's fourth restructuring. He acknowledged the complexity that comes with a $5 billion enterprise and 2,000 stores. He spoke about returning to the brand's underdog identity, about the underdog as both market position and philosophical stance.
On a Friday morning in late 2024, the man who once texted furiously from Auburn's practice field about logo placement on practice shorts was back in the CEO chair, surrounded by lieutenants imported from Adidas and Puma and Ralph Lauren, planning a $500 million marketing blitz, talking about underdogs. The molasses tanks on the Baltimore waterfront still bore the same three faces. The railroad still bisected the campus. The company was, in revenue terms, roughly where it had been seven years earlier.
The trains kept running.
