Stop Tax Haven Abuse Act

establish a rebuttable presumption against the validity of transactions by institutions that do not comply with reporting requirements under the Foreign Account Tax Compliance Act;

treat certain foreign corporations managed and controlled primarily in the United States as domestic corporations for tax purposes;

require tax withholding agents and financial institutions to report certain information about beneficial owners of foreign-owned financial accounts;

treat swap payments sent offshore as taxable U.S. source income; and

impose additional requirements for third party summonses used to obtain information in tax investigations that do not identify the person with respect to whose liability the summons is issued (i.e., John Doe summons).

Amends the Securities Exchange Act of 1934 to: (1) require corporations registered with the Securities and Exchange Commission (SEC) to report annually, on a country-by country basis, on employees, gross revenues, payments made to governments, and other financial information; and (2) impose a fine for failure to disclose any holdings or transactions involving equity or debt instruments known to involve a foreign entity that would otherwise be subject to disclosure requirements.

Makes investment advisers and persons engaged in forming new business entities subject to anti-money laundering requirements.

Imposes new restrictions on U.S. corporations and other entities with foreign income with respect to: (1) tax deductions allocable to deferred foreign income, (2) the recalculation of foreign income taxes, (3) intangible property transferred overseas, (4) tax evasion activities by U.S. corporations reincorporating in a foreign country, and (5) loans to U.S. shareholders from controlled foreign corporations.