Walker G. Aumann

Susquehanna Financial Group LLLP (SFG) is an institutional broker-dealer headquartered in Bala Cynwyd, Pennsylvania. The firm was founded in 2002 and is a direct subsidiary of SFG Holding LLC, which is owned by Bodel, Inc. SFG offers a full range of order execution and trading flow services, with a focus on delivering innovative trading strategies and execution services to institutional clients.

Ziegler Capital Management LLC (ZCM) is an asset management firm headquartered in Chicago, Illinois. The firm was founded in 1991 as the investment management division of the Ziegler Companies. They became a wholly owned subsidiary of Stifel Financial Corp. (NYSE: SF), when it acquired ZCM in 2013. The firm provides tailored investment solutions to a wide range of investors.

Tortoise Capital Advisors LLC (Tortoise) is a SEC-registered investment advisor firm headquartered in Overland Park, Kansas. The firm was founded by Harold Birzer in 2002 and is a subsidiary of TortoiseEcofin Borrower LLC (formerly Tortoise Borrower LLC), ultimately held by TortoiseEcofin Investments LLC. Tortoise provides investment management services to individual and institutional investors and pooled investment vehicles.

Advisory Research, Inc. (ARI) is a SEC-registered investment advisor headquartered in Chicago, Illinois. The firm was founded by David Heller in 1974 and is a wholly-owned subsidiary of Ostara, Inc. They provide discretionary investment management services to institutional and high-net-worth clients through separately managed accounts, unregistered pooled investment vehicles, and model-based accounts.

Northern Trust Investments, Inc. (Investment Management) (NTI-IM) is the asset management division of Northern Trust Investments, Inc., ultimately held by Northern Trust Corp. (NASDAQGS: NTRS), a multi-bank holding company established in 1889. The firm was founded in 1988 and headquartered in Chicago, Illinois. NTI-IM provides a wide range of discretionary and non-discretionary investment advisory and sub-advisory services to individual and institutional clients.

American Century Investment Management, Inc. (ACIM) is a SEC-registered investment advisor and mutual fund manager headquartered in Kansas City, Missouri. The firm was founded by James E. Stowers, Jr. in 1958 and is a wholly-owned subsidiary of American Century Cos., Inc. ACIM provides portfolio management services to financial advisors, individual investors and institutional clients.

Wells Fargo Securities LLC (WFS) is the broker/dealer subsidiary of EVEREN Capital Corp., ultimately owned by Wells Fargo & Co. (NYSE: WFC). Headquartered in New York, WFS delivers a comprehensive suite of banking, capital markets and advisory solutions, such as a full complement of sales, trading and research capabilities, to corporate, government and institutional clients.

Evercore Group LLC is a SEC-registered broker/dealer headquartered in New York City. The firm was founded in 1995 and is a subsidiary of Evercore BD Investco LLC, which is owned by Evercore, Inc. (NYSE: EVR). Evercore Group delivers equity research and equity sales and agency trading execution, in addition to providing wealth and investment management services to high net worth and institutional investors.

Zacks Investment Management, Inc. (ZIM) is a SEC-registered investment advisor headquartered in Chicago, Illinois. The firm was founded by Ben Zacks in 1992 and is a subsidiary of Zacks Investment Research, Inc., owned by The Greenwood Trust. ZIM manages separate accounts, public and private pooled investment vehicles, and is an adviser to several wrap-fee programs.