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

Osterweis 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
Q1 		– Sell
-325,647
Closed -$7.13M – 263
2025
Q4 		$7.13M Sell
325,647
-124,320
-28% -$2.83M 0.3% 81
2025
Q3 		$10.7M Sell
449,967
-125,045
-22% -$2.98M 0.48% 58
2025
Q2 		$12.9M Sell
575,012
-66,625
-10% -$1.48M 0.62% 46
2025
Q1 		$16.2M Buy
641,637
+161,125
+34% +$3.91M 0.8% 45
2024
Q4 		$11.2M Buy
480,512
+35,347
+8% +$918K 0.52% 60
2024
Q3 		$10.9M Buy
445,165
+69,700
+19% +$1.76M 0.55% 58
2024
Q2 		$9.51M Buy
375,465
+142,560
+61% +$3.64M 0.49% 58
2024
Q1 		$6.04M Sell
232,905
-25,075
-10% -$550K 0.36% 74
2023
Q4 		$5.49M Sell
257,980
-52,545
-17% -$1.15M 0.35% 75
2023
Q3 		$7.11M Sell
310,525
-25,810
-8% -$577K 0.52% 57
2023
Q2 		$7.03M Buy
336,335
+13,760
+4% +$285K 0.47% 64
2023
Q1 		$7.06M Buy
322,575
+35,610
+12% +$790K 0.48% 63
2022
Q4 		$6.73M Buy
286,965
+76,030
+36% +$1.85M 0.49% 62
2022
Q3 		$4.18M Buy
210,935
+127,155
+152% +$2.81M 0.31% 83
2022
Q2 		$1.76M Buy
+83,780
New +$2.09M 0.13% 101

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
Janus Henderson Group
Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return
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
NAMI
Nomura Asset Management International Philadelphia, Pennsylvania $66.6B AUM

Osterweis Capital Management's MGY Position: Q1 2026 in Review

Osterweis Capital Management sold out of Magnolia Oil & Gas (MGY) in Q1 2026, closing a stake of 325,647 shares — an estimated $7.13M sold.

Osterweis Capital Management first reported a position in MGY in Q2 2022 and held it in 15 quarters. The position peaked at $16.2M in Q1 2025. 405 funds tracked by Wall St. Rank hold MGY as of Q1 2026.

  • Osterweis Capital Management reported no remaining Magnolia Oil & Gas position as of Q1 2026 after selling out during the quarter.
  • Osterweis Capital Management sold 325,647 Magnolia Oil & Gas shares in Q1 2026, an estimated $7.13M.
  • Osterweis Capital Management first reported a position in Magnolia Oil & Gas in Q2 2022 and held it in 15 quarters.
  • Osterweis Capital Management's Magnolia Oil & Gas position peaked at $16.2M in Q1 2025.
  • 405 funds tracked by Wall St. Rank held Magnolia Oil & Gas as of Q1 2026.

Based on Osterweis Capital Management's 13F filing for Q1 2026, filed 15 May 2026.