Big Switch Networks, based on Stanford research, had raised more than $120m from investors including Dell Technologies Capital, Intel Capital and Accton.
The edge computing technology developer has reportedly been purchased by Apple, three years after being spun out of AI2 to advance work by University of Washington's Ali Farhadi.
Galecto, based on research at Lund and Edinburgh universities, is merging with PharmAkea, with the joint entity retaining the Galecto name and leadership team.
Altair has picked up computational electromagnetics software developer NewFasant, based on the research of University of Alcalá associate professor Lorena Lozano Plata.
MIT's Taris, which is developing a drug delivery system for bladder diseases, has been purchased by Johnson & Johnson.
UCD-founded wasterwater purification spinout OxyMem has been bought by DowDuPont, already one of its shareholders.
Tsinghua University-backed Meten Education will merge with EdtechX to pursue market share with Chinese students and young professionals.
Apple has picked up UEA's camera enhancement spinout Spectral Edge in a deal expected to boost the photography capabilities of its smartphones.