MG
AMTM

Michael Gelband’s Amentum Holdings AMTM Stock Holding History

Michael Gelband’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
Q2 		$4.68M Buy
+226,289
New +$5.47M 0.03% 520
2026
Q1 		– Sell
-1,184,186
Closed -$34.3M – 2190
2025
Q4 		$34.3M Buy
1,184,186
+1,077,998
+1,015% +$27.6M 0.27% 48
2025
Q3 		$2.54M Buy
106,188
+96,387
+983% +$2.35M 0.03% 656
2025
Q2 		$231K Buy
+9,801
New +$205K ﹤0.01% 1287

Other funds holding AMTM

Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
FCM
Frontier Capital Management Boston, Massachusetts $10.7B AUM 67.78% 1-Year Est. Return
TCA
Troluce Capital Advisors Dorado, Puerto Rico $971M AUM 2.27% 1-Year Est. Return

Michael Gelband's AMTM Position: Q2 2026 in Review

Michael Gelband opened a new position in Amentum Holdings (AMTM) in Q2 2026: 226,289 shares worth $4.68M. The stake represents 0.03% of the portfolio and ranks #520 among its holdings. This is a return to the name: Michael Gelband previously reported a position in AMTM as recently as Q4 2025.

Michael Gelband first reported a position in AMTM in Q2 2025 and has held it in 4 quarters since. The position peaked at $34.3M in Q4 2025. 457 funds tracked by Wall St. Rank hold AMTM as of Q2 2026.

  • Michael Gelband held 226,289 shares of Amentum Holdings worth $4.68M as of Q2 2026.
  • Amentum Holdings was a new Michael Gelband position in Q2 2026.
  • Amentum Holdings made up 0.03% of Michael Gelband's portfolio in Q2 2026, its #520 holding.
  • Michael Gelband first reported a position in Amentum Holdings in Q2 2025 and has held it in 4 quarters since.
  • Michael Gelband's Amentum Holdings position peaked at $34.3M in Q4 2025.
  • 457 funds tracked by Wall St. Rank held Amentum Holdings as of Q2 2026.

Based on ExodusPoint Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.