For example, a common arrangement in the private sector is for the employer to match employee contributions up to a certain percentage of the employee's salary. (educationnext.org)
Some employers match employee contributions dollar for dollar, while others contribute a percentage of what employees contribute. (americanfunds.com)
Many employers match employee contributions with company stock — and over time this amounts to a huge portion of the 401k portfolio. (thecollegeinvestor.com)