Fannin was laid to rest Friday afternoon at Fairhaven Memorial Park in Santa Ana.
The 62-year-old was the owner of Salon Meritage, where the shooting took place.
The funeral for another victim, 54-year-old Victoria Ann Buzzo took place Thursday. The private service was held at Our Lady of Refuge in Long Beach.
Next week, officials are planning to hold a town hall meeting to discuss the police response to the rampage.
Authorities are also expected to provide an update on the investigation.
Scott Dekraai is charged with the killings.
Prosecutors say Dekraai was involved in a child custody dispute with his ex-wife, Michelle Fournier, who worked at the salon. She was one of those killed.
How to help
The Fannin family established a memorial fund to benefit all the families of those killed in the shooting. Supporters can donate online at www.salonmeritagefund.org.
The city of Seal Beach, the Seal Beach Chamber of Commerce and Watson & Associates announced the establishment of the Seal Beach Victims' Fund account at the Bank of America at 208 Main St. in Seal Beach. Donations may be mailed or delivered to the Seal Beach Chamber of Commerce or the Bank of America with checks made payable to the Seal Beach Victims' Fund. Credit cards will also be accepted.
Additionally, those wishing to host a fundraiser, special event or related activity are encouraged to do so in coordination with the Chamber of Commerce, which is functioning as a clearinghouse for all such events.