Aug 28 (Reuters) - Catalent Inc is close to reaching a settlement with activist investor Elliott Investment Management which will include new directors and a pledge to review strategic alternatives such as the sale of the company, sources familiar with the matter said on Monday.

The company, which has been the target of takeover interest from both private equity firms and strategic buyers for months, is poised to agree to add four new directors proposed by Elliott to its board, which currently has 12 members, the sources said.

The sources declined to be identified because the information is confidential and cautioned a deal could still collapse at the last minute. Spokespeople for Catalent and Elliott declined to comment.

The stock price jumped 8% in after hours trading before giving up some of the gains after closing at $45.65 on Monday.

The settlement deal would allow Elliott, one of the industry's busiest activist investors, to help sway Catalent's strategy at a time its stocks price has lost roughly half of its value in the last year.

Earlier this year, Danaher, which on Monday agreed to acquire Abcam, was reported as a possible suitor.

Catalent, which is valued at roughly $8 billion and played a critical role during the pandemic to fill vials with the COVID-19 vaccine for several companies including AstraZeneca, Johnson & Johnson and Moderna, has grappled with a variety of problems recently.

Its chief financial officer left in April, when the company warned “productivity issues” and higher-than-expected costs at three of its manufacturing sites would hit fiscal 2023 results.

Catalent also warned in June when it released thrice-delayed quarterly earnings that the corrective actions it was undertaking to address quality control lapses identified by U.S. drug regulators at its Brussels factory required more time to fix.

The company is scheduled to report quarterly earnings before the U.S. market opens on Tuesday.

In the past when Elliott has pushed for sales of pieces or the entire target company, including at eBay and Switch Inc., and then won board representation, significant ownership changes have followed. Sell side analysts, including Deutsche Bank, note that Danaher, which is valued at $193 billion, has untapped M&A capacity even after buying Abcam.

Elliott isn't the only activist investor that had bought into Catalent this year with regulatory filings showing that Keith Meister's Corvex Management and Scott Ferguson's Sachem Head Capital Management owned shares in the company at the end of the second quarter. Despite Catalent’s operational and regulatory problems, several investors said there is value in the company given its role in meeting big pharma companies' demand for outsourced manufacturing.

Novo Nordisk's weight-loss drug Wegovy is filled by Catalent’s Brussels factory and last week Reuters reported that Catalent’s plant in Bloomington, Indiana will begin filling Wegovy injection pens for Novo.

Elliott this year pushed for changes at cloud computing company Salesforce where a proxy fight was averted when the company announced better returns and a host of measures to cut costs. It is also pushing to oust NRG CEO Mauricio Gutierrez. (Reporting by Svea Herbst-Bayliss in Boston and Maggie Fick in London; Editing by Shri Navaratnam)