• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia

Trendingnow

1

The millennial generation has split, new Fed research shows: Those over 35 are edging toward boomer-style wealth, while everyone else falls behind

2

Mark Cuban says he has the solution to growing income inequality, and it's to reward every employee—from CEO to janitor—with company stock

3

Mathematicians grapple with a ‘very rapid and very unsettling change’ as AI cracks yet another century-old problem

1

The millennial generation has split, new Fed research shows: Those over 35 are edging toward boomer-style wealth, while everyone else falls behind

2

Mark Cuban says he has the solution to growing income inequality, and it's to reward every employee—from CEO to janitor—with company stock

3

Mathematicians grapple with a ‘very rapid and very unsettling change’ as AI cracks yet another century-old problem
business owners

The 10 Worst Entrepreneurs of 2015

By
Steve Tobak
Steve Tobak
and
Entrepreneur
Entrepreneur
Down Arrow Button Icon
By
Steve Tobak
Steve Tobak
and
Entrepreneur
Entrepreneur
Down Arrow Button Icon
January 11, 2016, 10:43 AM ET
Sam Waksal is no stranger to biopharma controversy.
Sam Waksal is no stranger to biopharma controversy.Photograph by Stuart Isett — Fortune Most Powerful Women
Add Fortune on Google for similar content.

The biggest risk all of you face as you try to make it in the business world is that you buy into the massive hype of the entrepreneurial craze and think running a successful company is like falling off a log. It’s not. It’s really, really challenging.

While the best way to learn the ropes is through experience, another way is to understand what works and doesn’t work in the real business world. In 2015, this is what didn’t work and the ten entrepreneurs responsible. Pay attention. There are powerful lessons to be learned.

10. Ryan Grepper, founder and CEO, Coolest.

The Coolest Cooler inventor raised over $13 million to become the second-biggest Kickstarter campaign ever. That was the end of 2014. Today, Coolest is selling coolers on Amazon ahead of fulfilling commitments to its backers in order to “keep the lights on.” The good news is the product exists. The bad news is the reviews are dismal, with 28 percent giving it just “1 star,” mostly due to poor product quality and support. So not cool.

9. Sean Rad, founder and CEO, Tinder.

He’s in, he’s out, he’s in again, and he should be out again. Following in the footsteps of American Apparel’s Dov Charney, Abercrombie’s Michael Jeffries, and Lululemon’s Chip Wilson, Rad has some real issues, not to mention a serious case of foot-in-mouth disease that will continue to plague parent IAC’s Match Group, especially now that it’s a public company.

8. 50 Cent, rapper and entrepreneur.

Curtis James Jackson III, aka 50 Cent, made a fortune on a record label, on a clothing line, and as an actor. Then he reportedly made $100 million from an investment in a vitamin water company that was acquired by Coca-Cola. Last year, he filed for Chapter 11 bankruptcy protection. What went wrong? Lack of fiscal responsibility, i.e., he overspent. He’s not really broke, mind you, but using the courts to stiff creditors for $28 million is pretty low-class, if you ask me.

7. Ivan Reedman, co-founder and CEO, Torquing Group.

Less than a year after raising more than $3.4 million – a record for a European Kickstarter project – the Zano drone maker filed for “voluntary liquidation,” aka bankruptcy, stranding all but a few hundred of its 15,000 funders without the Zanos they’d purchased. Personally, I think anyone who backs high-risk projects like this is asking for trouble, but that’s just me.

6. Dan Price, founding CEO, Gravity Payments.

Price suddenly decided to raise the minimum annual salary at his 120-person credit-card-processing company to $70,000 over a three-year period. The story went viral, but that doesn’t mean it’ll work. Leveling the playing field removes incentives for managers and the enormous payroll increase may very well bankrupt the company. To make matters worse, Bloomberg recently revealed that Price’s motivation may not have been as altruistic as he made it out to be.

5. Ellen Pao, former interim CEO, Reddit.

Pao’s reign as interim chief of the popular social site was mercifully brief. In eight months, she was successful at just one thing: demonstrating a complete lack of understanding of the site and alienating just about the entire Reddit community. As with hercontroversial tenure at Silicon Valley venture firm Kleiner, Pao needs to learn that business is not about her, but about serving her stakeholders.

4. Tony Hsieh, founder and CEO, Zappos.

After growing the online retailer to $1 billion and selling it to Amazon, Hsieh has been experimenting with wacky management structures. Last year he transitioned to a controversial new organizational system with no managers or titles known as Holacracy. About 14 percent of the company quit and the rest are still trying to figure out what their pay and jobs are. It’s sort of nuts.

3. Gurbaksh Chahal, founder and CEO, Gravity4.

After pleading guilty to two domestic-violence charges, self-destructing in spectacular fashion, and getting fired by the board of ad-tech company RadiumOne on the eve of a planned IPO, the narcissistic serial entrepreneur is back in the news with a new assault arrest, a gender discrimination and harassment suit, and allegations of epic pill-popping. Need I say more?

2. Maren Kate Donovan, former CEO, Zirtual.

This high-flying virtual assistant startup was doing great until it tried to convert hundreds of contract workers to full-time employees. Then it crashed and burned. Sadly, that fate was preventable. If I’ve said it once I’ve said it a thousand times: the number one reason businesses fail is that they run out of cash. Every CEO must viscerally understand business and finance. Period.

1. Elizabeth Holmes, founder and CEO, Theranos.

The iconic Holmes dropped out of Stanford at 19 to disrupt the $76 billion laboratory diagnostic industry. She raised $400 million at a whopping $9 billion valuation and made an enormous PR splash after a decade in stealth mode. Then The Wall Street Journal broke a story questioning the efficacy and accuracy of the technology and Holmes has since been under fire. Looks like a major case of overhype and under-deliver to me.

[fortune-brightcove videoid=4593102738001]

More from Entrepreneur:

Why Entrepreneurs Should Pass on an MBA

10 Mindsets of a True Winner

50 Thoughts That Can Motivate You to Do Anything

These 10 stories represent some of the most common pitfalls that entrepreneurs face. And if you follow the links, you’ll learn more. I think the most important takeaway is this: with rare exception, these are all very smart and very capable people. That’s just how hard it is to build a successful growing business over the long haul. Never underestimate the challenge.

This piece was originally published on Entrepreneur.

 

About the Authors
By Steve Tobak
See full bioRight Arrow Button Icon
By Entrepreneur
See full bioRight Arrow Button Icon
Add Fortune on Google for similar content.

Latest in

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • TikTok icon
  • YouTube icon

Latest in

Sundar Pichai, chief executive officer of Alphabet Inc.
AIAlphabet
Anthropic and SpaceX just handed Google the biggest profit quarter in company history—on paper
By Eva RoytburgJuly 22, 2026
6 hours ago
Medicaid Services administrator Dr. Mehmet Oz speaks before Vice President JD Vance at the Wisconsin Air National Guard facility at Milwaukee Mitchell International Airport.
PoliticsDonald Trump
Trump admin deferring $1 billion-plus Medicaid payments to California and Minnesota amid ‘suspected fraud’
By The Associated Press and Ali SwensonJuly 22, 2026
9 hours ago
‘It’s called StreetEasy, not StreetHard’: Mamdani cracks down on scourge of ‘housefishing’ and ‘real estate slop’
Real EstateHousing
‘It’s called StreetEasy, not StreetHard’: Mamdani cracks down on scourge of ‘housefishing’ and ‘real estate slop’
By Tatiana SatauaJuly 22, 2026
9 hours ago
As Washington panics about Chinese AI, Jensen Huang says open-source models like Kimi are ‘excellent’ and should be embraced, not banned
AIChina
As Washington panics about Chinese AI, Jensen Huang says open-source models like Kimi are ‘excellent’ and should be embraced, not banned
By Marco Quiroz-GutierrezJuly 22, 2026
9 hours ago
The Top Fitness and Wellness Gifts (2026): For the Busy Gym-Goer in Your Life
HealthFitness
The Top Fitness and Wellness Gifts (2026): For the Busy Gym-Goer in Your Life
By Christina SnyderJuly 22, 2026
9 hours ago
OpenAI CEO Sam Altman sits next to U.S. President Donald Trump.
AITech regulation
OpenAI’s rogue hacking incident was a warning shot. Will it be a wake-up call to finally create AI safety regulation?
By Jeremy Kahn and Emily ForliniJuly 22, 2026
9 hours ago

Most Popular

The millennial generation has split, new Fed research shows: Those over 35 are edging toward boomer-style wealth, while everyone else falls behind
Real Estate
The millennial generation has split, new Fed research shows: Those over 35 are edging toward boomer-style wealth, while everyone else falls behind
By Nick LichtenbergJuly 22, 2026
13 hours ago
Mark Cuban says he has the solution to growing income inequality, and it's to reward every employee—from CEO to janitor—with company stock
Success
Mark Cuban says he has the solution to growing income inequality, and it's to reward every employee—from CEO to janitor—with company stock
By Sasha RogelbergJuly 20, 2026
3 days ago
Mathematicians grapple with a ‘very rapid and very unsettling change’ as AI cracks yet another century-old problem
AI
Mathematicians grapple with a ‘very rapid and very unsettling change’ as AI cracks yet another century-old problem
By Eva RoytburgJuly 21, 2026
2 days ago
OpenAI says its AI models secretly broke out of a secure test environment and hacked into AI company Hugging Face in order to cheat on an evaluation
Cybersecurity
OpenAI says its AI models secretly broke out of a secure test environment and hacked into AI company Hugging Face in order to cheat on an evaluation
By Jeremy Kahn and Emily ForliniJuly 21, 2026
1 day ago
Despite a $156 million contract, Knicks star Jalen Brunson still calls his parents for financial advice any time he makes a big purchase
Success
Despite a $156 million contract, Knicks star Jalen Brunson still calls his parents for financial advice any time he makes a big purchase
By Emma BurleighJuly 21, 2026
2 days ago
Scott Bessent casually says the U.S. has more than $1 trillion in gold—and that it doesn’t matter for the dollar
Economy
Scott Bessent casually says the U.S. has more than $1 trillion in gold—and that it doesn’t matter for the dollar
By Sasha RogelbergJuly 22, 2026
10 hours ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.