Elliott Advisors has increased its voting stake in Alliance Trust in the run up to the trust's annual general meeting later this month.
Alliance Trust's own corporate broker has admitted recent criticisms of the company have landed some "heavy blows" and has suggested a formal review of its business model.
The board of the Schroder Real Estate investment trust is proposing to move the trust onshore and convert it to a REIT.
Alternative assets dominated investment trust fundraising in 2014, Winterflood figures show, as investors looked outside the mainstream for returns.
Tim Ingram, chair of the Wealth Management Association and a former director of Alliance Trust, has backed Elliott Advisors' proposals to add three non-execs to the trust's board.
Baillie Gifford's global alpha equity team have replaced Gerald Smith as manager of the Monks investment trust as the board seeks to improve performance.
Woodford Investment Management, Ruffer, Sarasin and Invesco are among the groups backing a new share placing by Oakley Capital's private equity trust.
Fidelity Asian Values manager John Lo has stepped back from running the trust after a 13-year spell in charge, to be replaced by Nitin Bajaj.
Elliott Advisors has responded to Alliance Trust's formal circular to shareholders, rejecting the company's claims and accusing its board of resorting to "personal attacks".
The majority of investment trusts have seen their discounts widen in 2015 despite equity markets reaching record highs, leaving analysts perplexed.