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
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 $5.72T AUM 30.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
ROIC
Route One Investment Company San Francisco, California $2.35B AUM 11.7% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Holocene Advisors
Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return
LCOV
London Company of Virginia Richmond, Virginia $16.2B AUM 17.5% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

Magnetar Financial's POST Position: Q1 2026 in Review

Magnetar Financial increased its Post Holdings (POST) stake by 639% in Q1 2026, buying an estimated $1.36M and bringing the position to 15,424 shares worth $1.52M. The position accounts for 0.02% of the portfolio, ranked #369.

Magnetar Financial first reported a position in POST in Q4 2017 and has held it in 3 quarters since. 425 funds tracked by Wall St. Rank hold POST as of Q1 2026.

  • Magnetar Financial held 15,424 shares of Post Holdings worth $1.52M as of Q1 2026.
  • Magnetar Financial bought 13,338 Post Holdings shares in Q1 2026, an estimated $1.36M.
  • Post Holdings made up 0.02% of Magnetar Financial's portfolio in Q1 2026, its #369 holding.
  • Magnetar Financial first reported a position in Post Holdings in Q4 2017 and has held it in 3 quarters since.
  • 425 funds tracked by Wall St. Rank held Post Holdings as of Q1 2026.

Based on Magnetar Financial's 13F filing for Q1 2026, filed 13 May 2026.