Andrew Left

In 2019, the Hong Kong Court of Appeal dismissed Left's appeal against the decision of the Market Misconduct Tribunal. The Court of Appeal dismissed Left's application for leave to appeal to the Court of Final Appeal.

Citron Research published a report on May 19, 2019, regarding African eCommerce company Jumia, one month after its IPO had resulted in shares values rising about 250 percent. Subsequent to the Citron report, stock value dropped by 50 percent in one week. Citron alleged “material discrepancies” between the IPO filing and a confidential presentation made by Jumia to its investors on October 18, 2018. Citron Research alleged that the company had presented incorrect figures concerning active users, specifically, its percentage of product returned and active customers before the IPO. By August 2019, Jumia was named in several class-action suits related to employee frauds.

In 2018, following the Stoneman Douglas High School shooting, Left created a scholarship for students of the school. The award will provide five seniors per year between 2018 and 2021 a $10,000 scholarship.

In 2016, the Hong Kong Market Misconduct Tribunal (chaired by Mr Justice Hartmann) found that Left was culpable of market misconduct by publishing claims about Evergrande Group that were "false and/or misleading as to material facts or through the omission of material facts". Left was banned from trading for five years, ordered to repay around HK$1.6 million in trading profits and about HK$4 million in legal costs and expenses incurred by the SFC, and would face criminal prosecution if he breaks Hong Kong market misconduct rules again.

In October 2015, The Globe and Mail of Toronto, quoted independent research firm 5i Research Inc CEO Peter Hodson, as stating that "What they seem to do quite well is they're able to spin existing facts into a horrible scenario. It reads very badly," and that "Their job as a company is to create the most amount of panic so they and their clients can make the most amount of money."

Left's 2015 report on Valeant Pharmaceutical (later known as Bausch Health) accused the company of channel stuffing and using sham transactions to inflate drug sales. Left's initial report focused on an investigation launched by Senator Bernie Sanders and Representative Elijah Cummings that examined Valeant's business model of massively spiking the prices of drugs to which it had acquired marketing rights. Left followed up with a report focused on pharmaceutical distributor Philidor RX. Left called for the US Securities and Exchange Commission to investigate the issue and referred to the company as the "Pharmaceutical Enron". As a result of the report, Valeant shares dropped after a five-year peak, eventually falling more than 90 percent from its peak in August 2015, and announced the resignation of longtime CEO J. Michael Pearson the following March.

Qihoo 360 has threatened to take legal action against Citron Research, as has former Google China chief Kai-Fu Lee, now the chairman and CEO of Innovation Works. In 2012, posted a detailed, point-by-point rebuttal, via Sinocism, to Chinese investment platform Xueqiu.com, which also suggests that Citron had taken advantage of reader unfamiliariarity with ChineseIn 2019, languages and markets. Lee stated that, "Since Citron has already made big bets on these recommendations before their reports are published... Citron’s recommendation doesn’t have to be right; Citron just needs to mislead their readers to follow their recommendations!”

In 2012, the Hong Kong Securities and Futures Commission commenced proceedings in the Market Misconduct Tribunal against Left, contending that he had spread false and misleading information about Evergrande Group in a report published that year on Citron Research’s website. In that report, Left had alleged that Evergrande was insolvent and had consistently presented fraudulent information to the investing public.

In 2011, Left released a report through Citron about Longtop Financial, a financial software house based in China, accusing it of defrauding shareholdings, over-reporting revenues, and lacking transparency in the company's acquisition process. The report pointed out Longtop's outsized margins and unexplained stock grants and pointed out Longtop's relationship with China's largest banks. The company was later issued a Wells Notice of impending criminal charges from the SEC.

Citron launched 51 investigative reports against S&P 500 companies, between 2009 and 2015, as well as several Chinese companies, citing allegations of pyramid schemes, ineffective products and accounting, or business frauds. In 2016, Left was banned for five years by the Hong Kong Market Misconduct Tribunal for disclosing false or misleading information, and so inducing transactions under the Securities and Futures Ordinance. Despite being sued by multiple companies for the reports he has released, Left claims he has never lost a case in the United States; the National Futures Association sanctioned Left and stated that he “made false and misleading statements to cheat, defraud or deceive a customer in violation of NFA compliance rules.”

In 2008, Left released a report in which he concluded that Home Solutions was not transparent about the company's relationship with American Renaissance. Home Solutions had loaned money to American Renaissance before the "partnership" was disclosed publicly. As a result of Left's research, Home Solutions’ stock plummeted. Starting in 2012, Left published multiple reports about Questcor Pharmaceuticals centered around incorrect labeling of the drug Acthar's ingredients. When Questcor was acquired by Mallinckrodt, Left criticized the new company for continued misconduct. Several of Left's reports have become highly publicized, including a 2012 report on the legality of operations by Nu Skin Enterprises, and a 2015 report on Valeant Pharmaceuticals bringing attention to inflated sales.

GTX Global Corp. sued Left for defamation after a 2005 article he published through Citron about GTX Global. In 2007, the case was dismissed under California's anti-SLAPP statues which cover writings about publicly traded companies as matters of public interest.

Left switched to shorting the stocks full-time, using his own research to publish free reports on firms he feels are overvalued or engaged in fraud. In 2001, he founded StockLemon.com, now known as Citron Research. According to Left, he has made profits every year since he started short selling. He was a keynote speaker at the 2017 and 2018 Harvard Business School Investment Conference.

Left initially started StockLemon.com in 2001 as a self-published blog containing reports on controversial companies. He rebranded the site as Citron Research in 2007. Left researches and short sells companies he believes to be engaged in fraud, have been suspiciously promoted, or have been mistakenly overpriced by the stock market.

According to a Wall Street Journal analysis of 111 Citron short-sale reports spanning from 2001 to 2014, there was an average share-price decline of 42 percent in the year after Left's report was released. Of those shares, 90 were lower one year later while 21 gained, according to data from S&P Capital IQ.

In April 1999, Left became president and CEO of Detour Media. He was named director of the company in November 1999. In 2002, his then employer Detour Media sued Left and prevailed on a $25,000 default judgment against him.

Left's first job was with Universal Commodity Corp, a high-pressure commodities brokerage firm that hired salespeople to make cold calls and push "questionable investments." Left quit in March 1994, after 9 months with the company. When the National Futures Association sanctioned the firm in December 1998, Left, along with every other former employee, was sanctioned for three years along with being required to take an ethics-training course as part of the probe into the firm for making false statements to sell commodity futures contracts. The National Futures Association stated Mr. Left “made false and misleading statements to cheat, defraud or deceive a customer in violation of NFA compliance rules.”

Left was born in a Detroit suburb to a Jewish family and later moved with his family to Coral Springs, Florida. He attended Coral Springs High School where he was a member of the debate team and president of the Jewish youth group. He attended Northeastern University in 1993.

Andrew Edward Left (born July 9, 1970) is an activist short seller, author and editor of the online investment newsletter Citron Research, formerly StockLemon.com. Under the name Citron Research, Left publishes reports on firms that he claims are overvalued or are engaged in fraud. Left is known for advising investors on short selling and has often appeared on various media outlets such as CNBC and Bloomberg to talk about his opinions on stocks. In 2017, Left was called 'The Bounty Hunter of Wall Street' by The New York Times.