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Maranon beefs up staff with three additions

Maranon Capital LP has expanded its team with three new hires. The company has named Daniel Kirmse and Santo Barretta as portfolio analysts. Also, Fiona O’Connor has joined Maranon as an executive assistant. Previously, Kirmse worked at MB Financial Bank while Barretta was at Standard & Poor’s.

Twitter's Dick Costolo to step down as CEO-Reuters

Twitter Inc (TWTR.N) said Dick Costolo is stepping down as chief executive and will be replaced by co-founder Jack Dorsey on an interim basis.

PE club completes Life Time Fitness acquisition

Leonard Green & Partners, LNK Partners and TPG band together to buy the Minnesota health club operator

Oxford Capital hires Bradley as MD

Tom Bradley has joined Oxford Capital as managing director of its growth capital investment business. Previously, Bradley worked at DN Capital where he served as a partner focusing on the software and internet industries.

McAlear, Potvin join Giact

Giact Systems LLC, a portfolio company of Tritium Partners, said it added two senior sales executives. Robert McAlear was hired as EVP of Sales and Marketing while Timothy Potvin was hired as SVP of Sales. Both are newly created positions.

Sanusi joins Black Rhino as chairman

Black Rhino, a portfolio company of the Blackstone Group, said Thursday that His Highness Emir Muhammad Sanusi II has joined its board as chairman. Black Rhino, of Lagos, Nigeria, develops and acquires energy and infrastructure projects across Africa.

Star Mountain appoints ex-Morgan Stanley Chairman/CEO as senior advisor

Star Mountain Capital LLC has named John J. Mack as a senior advisor and strategic investor. Mack is the former chairman and CEO of Morgan Stanley.

Crestview, CVC and Pine Brook invest $650m in Fidelis

<p>Private equity club deal marks latest investment in<span style="font-family: 'Palatino Linotype', serif; font-size: 11pt; line-height: 107%;"> insurance sector</span></p>

Inteva Products appoints Dircks as VP and CFO

Troy, Michigan-based automotive supplier Inteva Products LLC has named William Dircks as vice president and chief financial officer. The appointment became effective June 1, 2015. Previously, Dircks was senior advisor at Charterhouse Equity Partners.

O'Brien, Kirson named Partners at Wynnchurch

Wynnchurch Capital said Monday that it promoted Chris O’Brien and Ian Kirson to Partner. Rosemont, Illinois-based Wynnchurch is a middle market private equity firm that invests in niche manufacturing, distribution and business service companies.