Question 1

How many shares of AMTM does FRONTIER CAPITAL MANAGEMENT CO LLC own?

Accepted Answer

As of 2026-Q1, FRONTIER CAPITAL MANAGEMENT CO LLC holds 4.9M shares of AMTM (AMENTUM HOLDINGS INC).

Question 2

What is FRONTIER CAPITAL MANAGEMENT CO LLC's AMTM position worth?

Accepted Answer

As of 2026-Q1, FRONTIER CAPITAL MANAGEMENT CO LLC's AMTM position is worth $128.6M.

Question 3

Is FRONTIER CAPITAL MANAGEMENT CO LLC buying or selling AMTM?

Accepted Answer

In 2026-Q1, FRONTIER CAPITAL MANAGEMENT CO LLC decreased their AMTM position (-14.6% change in shares).

Question 4

When did FRONTIER CAPITAL MANAGEMENT CO LLC first buy AMTM?

Accepted Answer

Based on available 13F filings, FRONTIER CAPITAL MANAGEMENT CO LLC first reported a position in AMTM in 2026-Q1. They have held the position across 5 quarters.