Billionaire investor Carl Icahn promised Dell Inc shareholders that the company would buy back up to $16 billion of stock if they join his campaign to stop the computer maker from going private, Reuters reported.

Guest columnist Philippe T. Schenk of Grove Street wonders if the uncertainty around taxes in Q4 affected PE investment decisions and led to a misalignment of interests between the taxable GP and the tax-exempt LP.

Dell’s special committee said Tuesday that it does not endorse the latest concept put forth by Carl Icahn. Icahn wants Dell to pursue a self-tender for its shares of about $16 billion, Dell said. The Dell special committee said that Icahn’s concept does not provide “financing, nor any commitment from any party to participate, nor any remedy for the company and its shareholders if the transaction is not consummated.”

Billionaire investor Carl Icahn told Dell Inc shareholders that an investment bank would help fund his offer for the PC maker as he sought to assuage concerns over his means to fund the bid.

Sun Capital Partners has acquired Johnny Rockets. Financial terms weren’t announced. RedZone Capital is the seller. Johnny Rockets, of Aliso Viejo, Calif., is a burger chain with 300 corporate and franchise-owned restaurants in 30 states and 16 countries. North Point  Advisors provided financial advice to RedZone and Johnny Rockets.

German industrial conglomerate Siemens is seeking offers from private equity firms to buy its stake in its telecoms equipment joint venture Nokia Siemens Networks (NSN), sources told Reuters.

The IPO of HD Supply could provide a way for Bain Capital, the Carlyle Group and Clayton Dubilier & Rice to recoup their investment.

The Halifax Group, a middle-market private equity firm, said on Tuesday that it has acquired Envision Pharma from a subsidiary of Express Scripts Holding Co. Halifax partnered with Envision management to complete the acquisition. No financial terms were disclosed. Based in Southport, Connecticut, Envision Pharma is a provider of technology and scientific communication that serves pharmaceutical, biotechnology and medical device companies.

Morgenthaler Private Equity said on Tuesday that it has recapitalized United Pipe & Steel Corp, a provider of steel pipe, copper tubing, plastic pipe, electrical conduit and related products.No financial terms were disclosed. Madison Capital Funding and RBS Citizens N.A. provided senior debt financing while Northwestern Mutual Capital provided subordinated debt financing. Mintz Levin advised MPE on the transaction, which closed June 12, 2013. UP&S President and CEO Greg Leidner will continue in his present role.

German Equity Partners III, the private equity fund managed by ECM Equity Capital Management, is selling its majority shareholding in KADI AG, Langenthal, a Swiss producer of frozen food, to the Munich based private equity company Paragon Partners. The parties have agreed not to disclose the purchase price or other details of the transaction.