Citigroup Inc. has added four managing directors to its technology banking practice. Jon Krahulik, Herb Yeh and Sean Rogers all joined from Bank of America Merrill Lynch, while Ethan Zweig came over from Credit ­Suisse Group.

Krahulik is based in Palo Alto, Calif., and focuses on semiconductors. He led coverage of cleantech at BofA Merrill and before that was a managing director at Deutsche Bank AG. He began his investment banking career at Lehman Brothers Holdings Inc. in 1998 after spending several years as a corporate lawyer at Crane, Kelley, Greene and Parente.

Yeh covers large-cap technology and began his career as a corporate and securities lawyer at Cleary Gottlieb Steen and Hamilton LLP in New York.

Palo Alto, Calif.-based Zweig was a managing director and co-head of the technology mergers and acquisitions group at Credit Suisse. He first joined Credit Suisse in 1998 and was a founding member of Union Square Advisors LLC from 2007 until 2010.

Rogers, working from New York, focuses on communications equipment and was BofA's head of Europe, Middle East and Africa technology. He previously led coverage of the communications equipment sector. Before joining BofA in 2004, he spent seven years with Salomon Smith Barney and Citigroup. Rogers began his career in 1995 in the Chase Securities M&A group.

The Wall Street Journal has reported that Apollo Global Management LLC's Leon Black was the successful mystery bidder for Edvard Munch's painting "The Scream" during an auction at Sotheby's in early May. This version of "The Scream" went for $120 million, a record for a painting sold at auction. So far, Black has not confirmed the purchase.

Barclays plc's Martin Kelly will succeed Gene Donnelly as chief financial officer of Apollo Global Management LLC no later than Oct. 1. Donnelly will pursue other opportunities but has agreed to continue as CFO until mid-August. He will remain as a senior adviser through year's end.

Most recently at Barclays, which is facing fallout from the LIBOR-rigging scandal, Kelly was managing director, CFO of the Americas, and global head of financial control for the corporate and investment bank. He joined Barclays via Lehman Brothers Holdings Inc., where he had worked since 2000. Before that, Kelly spent 13 years with PricewaterhouseCoopers LLP, including in the financial services group in New York from 1994 to 2000. He was appointed a partner of PwC in 1999.

Donnelly joined Apollo in 2010 following a 30-year career with PwC, most recently as lead client relationship partner for several private equity firms. Before joining PwC's transaction services practice, Donnelly was with the audit practice from 1979 to 1995, and was named a partner in 1989.

Perella Weinberg Partners LP has tapped Philippe McAuliffe as an advisory partner in New York and Nick Johnston as a managing director in London.

McAuliffe was a managing director in JPMorgan Chase & Co.'s healthcare investment banking group, where he advised clients in medical devices and diagnostics. Before that, he was a member of the equity private placements group, where he led the healthcare practice.

Johnston was an executive director in JPMorgan's healthcare investment banking division, with clients in the pharmaceutical, specialty pharmaceutical and medical devices industries. He had been chief operating officer of the operating subsidiaries of Microsulis Medical Ltd.

Glenn Kim has joined Moelis & Co. LLC as a managing director to advise European sovereign and government sector clients and financial institutions. Based in London, Kim joins from Bundesrepublik Deutschland Finanzagentur GmbH, Germany's funding entity under the Ministry of Finance, where he was a senior adviser on European Financial Stability Facility-related activities. Previously, he was a managing director at Lehman Brothers Holdings Inc., where he spent more than 20 years, including as head of public-sector and emerging markets.

Credit Suisse Group has hired Nicole Yuen as managing director and head of Greater China equities. Yuen spent 18 years at UBS, where she had been head of China equities since 2003.

Lazard has appointed Bill White, former U.S. deputy secretary of energy under Bill Clinton and three-term Houston mayor, as chairman of Lazard Houston. Before being elected mayor in 2003, White spent six years as CEO of Wedge Group Inc., a private equity firm. He began his career as a lawyer at Susman Godfrey LLP in Houston. In 2010 White made an unsuccessful run for governor of Texas, losing to incumbent Rick Perry. At Lazard, White will seek to help the firm win energy deals. The firm also recently hired David Cecil, a former Houston-based banker at Bank of Nova Scotia, and Mark Renton, a former vice chairman at Citigroup Inc., to bolster its energy group. n

-- Baz Hiralal compiled this report.