Indiana Code Title 28. Financial Institutions § 28-6.2-1-3

(1) knowing participation in a joint activity or interdependent conscious parallel action towards a common goal, whether or not under an express agreement;  or

(2) a combination of pooling of voting or other interests in the securities of an issuer for a common purpose pursuant to any contract, understanding, relationship, agreement, or other arrangement, whether written or otherwise.

(1) an employee stock benefit plan is not acting in concert with its trustee or a person who serves in a similar capacity solely for the purpose of determining whether stock held by the trustee and stock held by the plan will be aggregated;  and

(2) no officer or director of a savings bank or savings bank affiliate is acting in concert with any other officer or director of the savings bank or affiliate by reason of the service of the officer or director in those capacities.