Kohlberg Kravis Roberts & Co co-founders Henry Kravis and George Roberts were paid about $22 million last year in fee and other income, and own about a quarter of the private equity firm which is about to list on the NYSE, according to a regulatory filing.

The firm is moving closer to gaining its long-sought New York Stock Exchange listing, and on Tuesday it updated its filing with the U.S. Securities and Exchange Commission with details of senior executive ownership and pay.

Kravis and Roberts were also both awarded a $70 million noncash amount, which represents how KKR accounts for the difference in value between what they owned before KKR became a public company and how it is valued after becoming publicly traded.

The listing process contrasts with that of rival private equity giant Blackstone Group , which went public in 2007. The payout of Blackstone CEO Stephen Schwarzman was up to $677.2 million. Schwarzman, who drew a salary of $350,000 last year, currently owns about 23 percent of Blackstone.

KKR is going public via a complex route that involved buying its Amsterdam-quoted fund KKR Private Equity Investors and becoming a Euronext-listed company. Under that deal, KKR owns 70 percent of the new company.

Kravis and Roberts, who cofounded the firm in 1976, each own 87 million shares, according to the filing, which equates to just under 13 percent each of the total 683 million shares.

Based on the price of KKR's shares on Euronext at Monday's close, their stakes are worth around $809 million each. Their percentage ownership in the company, not previously disclosed, will be about the same before and after its NYSE listing.

The company as a whole is valued at around $6.4 billion, based on Monday's close in Amsterdam.

Kravis and Roberts are taking a yearly salary of $250,000, according to the filing.

Their distribution of $22 million last year was mostly made up of their share of KKR's fee income, generated from businesses including KKR's capital markets, private equity funds and KKR asset management units. A small part is carried interest -- the percentage of profit that private equity executives take when their funds perform well.

KKR filed with the SEC in March to list on the NYSE and trade under the symbol KKR. It has said the listing would allow it to have a more permanent capital base, use stock to retain and attract staff, and have a currency to use in making acquisitions.

It has made several amendments to the original filing. The SEC needs to declare the listing registration effective before KKR can decide when the shares will start trading.

(Reporting by Megan Davies; editing by John Wallace and Matthew Lewis)