SNBOSD
AMTM

Security National Bank of So Dak’s Amentum Holdings AMTM Stock Holding History

Security National Bank of So Dak’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
Q1 		$681K Sell
26,129
-513
-2% -$16.1K 0.33% 70
2025
Q4 		$773K Sell
26,642
-144
-0.5% -$3.68K 0.38% 67
2025
Q3 		$642K Sell
26,786
-54
-0.2% -$1.31K 0.32% 68
2025
Q2 		$634K Buy
26,840
+2,016
+8% +$42.1K 0.35% 70
2025
Q1 		$452K Buy
24,824
+1,525
+7% +$31.1K 0.26% 80
2024
Q4 		$490K Buy
+23,299
New +$602K 0.27% 73

Other funds holding AMTM

AS
American Securities New York $3.93B AUM 52.22% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $9.73B AUM 55.65% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Security National Bank of So Dak's AMTM Position: Q1 2026 in Review

Security National Bank of So Dak reduced its Amentum Holdings (AMTM) stake by 1.9% in Q1 2026, selling an estimated $16.1K and leaving 26,129 shares worth $681K. The position accounts for 0.33% of the portfolio, ranked #70.

Security National Bank of So Dak first reported a position in AMTM in Q4 2024 and has held it in 6 quarters since. The position peaked at $773K in Q4 2025. 486 funds tracked by Wall St. Rank hold AMTM as of Q1 2026.

  • Security National Bank of So Dak held 26,129 shares of Amentum Holdings worth $681K as of Q1 2026.
  • Security National Bank of So Dak sold 513 Amentum Holdings shares in Q1 2026, an estimated $16.1K.
  • Amentum Holdings made up 0.33% of Security National Bank of So Dak's portfolio in Q1 2026, its #70 holding.
  • Security National Bank of So Dak first reported a position in Amentum Holdings in Q4 2024 and has held it in 6 quarters since.
  • Security National Bank of So Dak's Amentum Holdings position peaked at $773K in Q4 2025.
  • 486 funds tracked by Wall St. Rank held Amentum Holdings as of Q1 2026.

Based on Security National Bank of So Dak's 13F filing for Q1 2026, filed 15 May 2026.