Ndegwa, an executive director of First Chartered Securities Limited, owns 4.3 percent of NCBA Group.
Ndegwa owns 4.3 percent of NCBA Group, or 70,909,968 ordinary shares.
The family of the late Jomo Kenyatta, Kenya's prime minister from 1963 to 1964, will receive a dividend of $4.27 million from their stake.
Ndegwa's 4.3-percent stake in NCBA Group, now worth $15 million, has dropped in value in recent weeks.
NCBA Group is a Nairobi-based financial services conglomerate functioning as a non-operating holding.
The two brothers own a joint stake amounting to 138,525,913 ordinary shares in NCBA Group.
NCBA Group Plc is an East African financial services conglomerate headquartered in Nairobi, Kenya.
