MF
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Magnetar Financial’s Boston Beer SAM Stock Holding History

Magnetar Financial’s Portfolio SAM Stock Details SAM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-3,055
Closed -$704K – 1426
2026
Q1 		$704K Buy
3,055
+1,920
+169% +$432K 0.01% 552
2025
Q4 		$221K Buy
+1,135
New +$234K ﹤0.01% 771
2025
Q3 		– Sell
-18,012
Closed -$3.44M – 1146
2025
Q2 		$3.44M Buy
18,012
+17,014
+1,705% +$3.92M 0.02% 280
2025
Q1 		$238K Buy
+998
New +$243K ﹤0.01% 622
2021
Q3 		– Sell
-1,595
Closed -$1.63M – 1499
2021
Q2 		$1.63M Buy
+1,595
New +$1.79M 0.02% 614

Other funds holding SAM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 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
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

Magnetar Financial's SAM Position: Q2 2026 in Review

Magnetar Financial sold out of Boston Beer (SAM) in Q2 2026, closing a stake of 3,055 shares — an estimated $704K sold.

Magnetar Financial first reported a position in SAM in Q2 2021 and held it in 5 quarters. The position peaked at $3.44M in Q2 2025. 331 funds tracked by Wall St. Rank hold SAM as of Q2 2026.

  • Magnetar Financial reported no remaining Boston Beer position as of Q2 2026 after selling out during the quarter.
  • Magnetar Financial sold 3,055 Boston Beer shares in Q2 2026, an estimated $704K.
  • Magnetar Financial first reported a position in Boston Beer in Q2 2021 and held it in 5 quarters.
  • Magnetar Financial's Boston Beer position peaked at $3.44M in Q2 2025.
  • 331 funds tracked by Wall St. Rank held Boston Beer as of Q2 2026.

Based on Magnetar Financial's 13F filing for Q2 2026, filed 14 Aug 2026.