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Mattson Financial Services’s Affiliated Managers Group AMG Stock Holding History

Mattson Financial Services’s Portfolio AMG Stock Details AMG Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$226K Sell
600
-327
-35% -$101K 0.05% 224
2026
Q1 		$257K Buy
+927
New +$279K 0.06% 206

Other funds holding AMG

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 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
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
AI
Ariel Investments Chicago, Illinois $10B AUM 42.59% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Mattson Financial Services's AMG Position: Q2 2026 in Review

Mattson Financial Services reduced its Affiliated Managers Group (AMG) stake by 35% in Q2 2026, selling an estimated $101K and leaving 600 shares worth $226K. The position accounts for 0.05% of the portfolio, ranked #224.

Mattson Financial Services first reported a position in AMG in Q1 2026 and has held it in 2 quarters since. The position peaked at $257K in Q1 2026. 566 funds tracked by Wall St. Rank hold AMG as of Q2 2026.

  • Mattson Financial Services held 600 shares of Affiliated Managers Group worth $226K as of Q2 2026.
  • Mattson Financial Services sold 327 Affiliated Managers Group shares in Q2 2026, an estimated $101K.
  • Affiliated Managers Group made up 0.05% of Mattson Financial Services's portfolio in Q2 2026, its #224 holding.
  • Mattson Financial Services first reported a position in Affiliated Managers Group in Q1 2026 and has held it in 2 quarters since.
  • Mattson Financial Services's Affiliated Managers Group position peaked at $257K in Q1 2026.
  • 566 funds tracked by Wall St. Rank held Affiliated Managers Group as of Q2 2026.

Based on Mattson Financial Services's 13F filing for Q2 2026, filed 4 Aug 2026.