MediaMath said Tuesday that it has closed $73.5 million in Series C funding. Spring Lake Equity Partners led the round with participation from Akamai Technologies, Safeguard Scientifics, Catalyst Investors and Observatory Capital. Also, the firm received a $105 million debt facility from Silicon Valley Bank. GCA Savvian provided financial advice in connection with the equity portion of the transaction. MediaMath is a provider of digital marketing solutions.