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SIR Capital Management’s Magnolia Oil & Gas MGY Stock Holding History

SIR Capital Management’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 		$5.82M Sell
227,667
-623,427
-73% -$17.8M 0.67% 45
2026
Q1 		$26.9M Sell
851,094
-159,700
-16% -$4.27M 2.51% 14
2025
Q4 		$22.1M Sell
1,010,794
-729,367
-42% -$16.6M 2.45% 14
2025
Q3 		$41.5M Buy
1,740,161
+349,461
+25% +$8.33M 3.73% 7
2025
Q2 		$31.3M Buy
1,390,700
+1,133,900
+442% +$25.1M 2.79% 13
2025
Q1 		$6.49M Buy
256,800
+173,000
+206% +$4.19M 0.57% 49
2024
Q4 		$1.96M Sell
83,800
-292,100
-78% -$7.59M 0.2% 62
2024
Q3 		$9.18M Sell
375,900
-220,249
-37% -$5.55M 0.89% 37
2024
Q2 		$15.1M Buy
+596,149
New +$15.2M 1.5% 23
2023
Q2 		– Sell
-927,900
Closed -$20.3M – 74
2023
Q1 		$20.3M Buy
+927,900
New +$20.6M 2.16% 12
2022
Q2 		– Sell
-261,600
Closed -$6.19M – 88
2022
Q1 		$6.19M Buy
+261,600
New +$5.74M 1.09% 29
2021
Q4 		– Sell
-425,672
Closed -$7.57M – 78
2021
Q3 		$7.57M Sell
425,672
-440,170
-51% -$6.65M 1.11% 32
2021
Q2 		$13.5M Buy
865,842
+115,753
+15% +$1.49M 2% 18
2021
Q1 		$8.61M Sell
750,089
-983,171
-57% -$10.2M 1.45% 23
2020
Q4 		$12.2M Buy
1,733,260
+426,268
+33% +$2.54M 2.39% 16
2020
Q3 		$6.76M Buy
1,306,992
+490,616
+60% +$3.05M 1.61% 23
2020
Q2 		$4.95M Buy
+816,376
New +$4.46M 1.21% 27
2018
Q4 		– Sell
-69,000
Closed -$1.04M – 62
2018
Q3 		$1.04M Buy
+69,000
New +$901K 0.15% 54

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 $3.37T AUM 44.26% 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
JT
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

SIR Capital Management's MGY Position: Q2 2026 in Review

SIR Capital Management reduced its Magnolia Oil & Gas (MGY) stake by 73% in Q2 2026, selling an estimated $17.8M and leaving 227,667 shares worth $5.82M. The position accounts for 0.67% of the portfolio, ranked #45.

SIR Capital Management first reported a position in MGY in Q3 2018 and has held it in 18 quarters since. The position peaked at $41.5M in Q3 2025. 408 funds tracked by Wall St. Rank hold MGY as of Q2 2026.

  • SIR Capital Management held 227,667 shares of Magnolia Oil & Gas worth $5.82M as of Q2 2026.
  • SIR Capital Management sold 623,427 Magnolia Oil & Gas shares in Q2 2026, an estimated $17.8M.
  • Magnolia Oil & Gas made up 0.67% of SIR Capital Management's portfolio in Q2 2026, its #45 holding.
  • SIR Capital Management first reported a position in Magnolia Oil & Gas in Q3 2018 and has held it in 18 quarters since.
  • SIR Capital Management's Magnolia Oil & Gas position peaked at $41.5M in Q3 2025.
  • 408 funds tracked by Wall St. Rank held Magnolia Oil & Gas as of Q2 2026.

Based on SIR Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.