Cornerstone Planning Group
AMTM icon

Cornerstone Planning Group’s Amentum Holdings AMTM Stock Holding History

Cornerstone Planning Group’s Portfolio AMTM Stock Details AMTM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q3 		– Sell
-6
Closed -$129 – 1810
2026
Q2 		$129 Hold
6
– – ﹤0.01% 1823
2026
Q1 		$146 Hold
6
– – ﹤0.01% 1783
2025
Q4 		$214 Hold
6
– – ﹤0.01% 1629
2025
Q3 		$131 Hold
6
– – ﹤0.01% 1636
2025
Q2 		$152 Buy
+6
New +$125 ﹤0.01% 1472
2025
Q1 		– Sell
-14
Closed -$301 – 1703
2024
Q4 		$301 Hold
14
– – ﹤0.01% 1286
2024
Q3 		$431 Buy
+14
New +$399 ﹤0.01% 1119

Other funds holding AMTM

Cacti Asset Management
Cacti Asset Management Atlanta, Georgia $1.89B AUM 58.55% 1-Year Est. Return
Segra Capital Management
Segra Capital Management Palm Beach, Florida $987M AUM 57.18% 1-Year Est. Return
OpenArc Corporate Advisory
OpenArc Corporate Advisory Atlanta, Georgia $8.86B AUM 19.31% 1-Year Est. Return
North Growth Management
North Growth Management Vancouver, British Columbia, Canada $743M AUM 74.29% 1-Year Est. Return
Wedge Capital Management
Wedge Capital Management Charlotte, North Carolina $5.72B AUM 38.26% 1-Year Est. Return
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $52.9B AUM 36.03% 1-Year Est. Return
OTL
Oak Thistle LLC New York $1.09B AUM 11.78% 1-Year Est. Return
Harbor Capital Advisors
Harbor Capital Advisors Chicago, Illinois $1.48B AUM 30.88% 1-Year Est. Return
Wealth Enhancement Advisory Services
Wealth Enhancement Advisory Services Plymouth, Minnesota $67.3B AUM 21.9% 1-Year Est. Return
Louisiana State Employees Retirement System
Louisiana State Employees Retirement System Baton Rouge, Louisiana $6.56B AUM 41.43% 1-Year Est. Return

Cornerstone Planning Group's AMTM Position: Q3 2026 in Review

Cornerstone Planning Group sold out of Amentum Holdings (AMTM) in Q3 2026, closing a stake of 6 shares — an estimated $129 sold.

Cornerstone Planning Group first reported a position in AMTM in Q3 2024 and held it in 7 quarters. The position peaked at $431 in Q3 2024. 74 funds tracked by Wall St. Rank hold AMTM as of Q3 2026.

  • Cornerstone Planning Group reported no remaining Amentum Holdings position as of Q3 2026 after selling out during the quarter.
  • Cornerstone Planning Group sold 6 Amentum Holdings shares in Q3 2026, an estimated $129.
  • Cornerstone Planning Group first reported a position in Amentum Holdings in Q3 2024 and held it in 7 quarters.
  • Cornerstone Planning Group's Amentum Holdings position peaked at $431 in Q3 2024.
  • 74 funds tracked by Wall St. Rank held Amentum Holdings as of Q3 2026.

Based on Cornerstone Planning Group's 13F filing for Q3 2026, filed 16 Oct 2026.