** Shares of drug developer TCR2 Therapeutics Inc TCRR.O
rise ~43% to $1.73 premarket
** UK-based Adaptimmune Therapeutics ADAP.O to buy TCR2 in
an all-stock transaction to bolster its pipeline of cancer
therapies
** TCR2 stockholders will receive 1.5117 Adaptimmune ADS for
each TCR2 share
** Adaptimmune shareholders to own ~75% of the combined
company, while TCR2 stockholders to own the rest
** After the deal's closing, combined company's cash runway
expected to extend into 2026
** TCR2 shares have fallen ~52% in the past 12 months
(Reporting by Raghav Mahobe)
((Raghav.Mahobe@thomsonreuters.com))