MF
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Magnetar Financial’s Post Holdings POST Stock Holding History

Magnetar Financial’s Portfolio POST Stock Details POST Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.11M Sell
12,584
-2,840
-18% -$277K 0.01% 422
2026
Q1 		$1.52M Buy
15,424
+13,338
+639% +$1.36M 0.02% 369
2025
Q4 		$207K Buy
+2,086
New +$216K ﹤0.01% 785
2018
Q1 		– Sell
-6,274
Closed -$325K – 759
2017
Q4 		$325K Buy
+6,274
New +$334K 0.01% 490

Other funds holding POST

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
ROIC
Route One Investment Company San Francisco, California $2.49B AUM 10.92% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 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
LCOV
London Company of Virginia Richmond, Virginia $17.5B AUM 29.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Norges Bank
Norges Bank Oslo, Norway $1T AUM
Holocene Advisors
Holocene Advisors New York $44.4B AUM 57.89% 1-Year Est. Return

Magnetar Financial's POST Position: Q2 2026 in Review

Magnetar Financial reduced its Post Holdings (POST) stake by 18% in Q2 2026, selling an estimated $277K and leaving 12,584 shares worth $1.11M. The position accounts for 0.01% of the portfolio, ranked #422.

Magnetar Financial first reported a position in POST in Q4 2017 and has held it in 4 quarters since. The position peaked at $1.52M in Q1 2026. 414 funds tracked by Wall St. Rank hold POST as of Q2 2026.

  • Magnetar Financial held 12,584 shares of Post Holdings worth $1.11M as of Q2 2026.
  • Magnetar Financial sold 2,840 Post Holdings shares in Q2 2026, an estimated $277K.
  • Post Holdings made up 0.01% of Magnetar Financial's portfolio in Q2 2026, its #422 holding.
  • Magnetar Financial first reported a position in Post Holdings in Q4 2017 and has held it in 4 quarters since.
  • Magnetar Financial's Post Holdings position peaked at $1.52M in Q1 2026.
  • 414 funds tracked by Wall St. Rank held Post Holdings as of Q2 2026.

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