Jim Simons
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Jim Simons’s Magnolia Oil & Gas MGY Stock Holding History

Jim Simons’s Portfolio MGY Stock Details MGY Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$33.2M Sell
1,296,902
-404,900
-24% -$11.6M 0.05% 490
2026
Q1 		$53.7M Buy
1,701,802
+517,500
+44% +$13.8M 0.08% 302
2025
Q4 		$25.9M Buy
1,184,302
+67,991
+6% +$1.55M 0.04% 496
2025
Q3 		$26.6M Buy
1,116,311
+20,013
+2% +$477K 0.04% 599
2025
Q2 		$24.6M Buy
1,096,298
+432,998
+65% +$9.6M 0.03% 620
2025
Q1 		$16.8M Buy
663,300
+121,900
+23% +$2.96M 0.03% 737
2024
Q4 		$12.7M Buy
541,400
+487,820
+910% +$12.7M 0.02% 871
2024
Q3 		$1.31M Sell
53,580
-447,120
-89% -$11.3M ﹤0.01% 2290
2024
Q2 		$12.7M Buy
500,700
+77,800
+18% +$1.98M 0.02% 801
2024
Q1 		$11M Buy
422,900
+216,900
+105% +$4.76M 0.02% 940
2023
Q4 		$4.39M Buy
206,000
+15,700
+8% +$344K 0.01% 1439
2023
Q3 		$4.36M Sell
190,300
-324,000
-63% -$7.24M 0.01% 1387
2023
Q2 		$10.7M Sell
514,300
-155,300
-23% -$3.21M 0.02% 986
2023
Q1 		$14.7M Sell
669,600
-21,400
-3% -$475K 0.02% 883
2022
Q4 		$16.2M Buy
691,000
+229,700
+50% +$5.6M 0.02% 836
2022
Q3 		$9.14M Buy
461,300
+148,200
+47% +$3.28M 0.01% 1081
2022
Q2 		$6.57M Sell
313,100
-617,800
-66% -$15.4M 0.01% 1361
2022
Q1 		$22M Buy
+930,900
New +$20.4M 0.03% 711
2020
Q2 		– Sell
-108,300
Closed -$433K – 3646
2020
Q1 		$433K Buy
+108,300
New +$932K ﹤0.01% 2830
2019
Q1 		– Sell
-49,232
Closed -$552K – 3597
2018
Q4 		$552K Buy
+49,232
New +$619K ﹤0.01% 2824

Other funds holding MGY

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Jupiter Topco
Jupiter Topco New York $245B AUM
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
AllianceBernstein
AllianceBernstein Nashville, Tennessee $302B AUM 26.44% 1-Year Est. Return

Jim Simons's MGY Position: Q2 2026 in Review

Jim Simons reduced its Magnolia Oil & Gas (MGY) stake by 24% in Q2 2026, selling an estimated $11.6M and leaving 1,296,902 shares worth $33.2M. The position accounts for 0.05% of the portfolio, ranked #490.

Jim Simons first reported a position in MGY in Q4 2018 and has held it in 20 quarters since. The position peaked at $53.7M in Q1 2026. 411 funds tracked by Wall St. Rank hold MGY as of Q2 2026.

  • Jim Simons held 1,296,902 shares of Magnolia Oil & Gas worth $33.2M as of Q2 2026.
  • Jim Simons sold 404,900 Magnolia Oil & Gas shares in Q2 2026, an estimated $11.6M.
  • Magnolia Oil & Gas made up 0.05% of Jim Simons's portfolio in Q2 2026, its #490 holding.
  • Jim Simons first reported a position in Magnolia Oil & Gas in Q4 2018 and has held it in 20 quarters since.
  • Jim Simons's Magnolia Oil & Gas position peaked at $53.7M in Q1 2026.
  • 411 funds tracked by Wall St. Rank held Magnolia Oil & Gas as of Q2 2026.

Based on Renaissance Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.