The issue will comprise a placing, offer for subscription and intermediaries offer, it said today, with the price at a 1.5% premium to asset value on the day the placing closes.
No details on the possible size were released, though BB Healthcare said the aim is to complete the funding by the end of the month.
The trust listed in December with a remit to invest in up to 35 healthcare companies. Net asset value (before dividends) has risen by 18% to 116p since then, a performance matched by the shares that closed Friday at 117.5p.
Bellvue Asset Management manages the trust and said as well giving it the opportunity for new investments, increasing its size would improve its marketability and liquidity and lower costs.
Its strategy for BB Healthcare is long-only investments in listed or quoted global healthcare equities. BB Healthcare is also committed to paying an annual dividend equivalent to 3.5% of the NAV of the portfolio.