tranche
noun [ C ]
FINANCE uk/trɑːnʃ/ usone of the parts into which a particular financial arrangement, payment, investment, etc. is divided:
The oil company will pay $2.4 billion in cash up front, with three annual tranches of $1.25 billion to come.
They will follow up last year's initial public offering with the sale of a further tranche of shares worth up to €500m.