Janus Henderson Group
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Janus Henderson Group’s Magnolia Oil & Gas MGY Stock Holding History

Janus Henderson Group’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 		$198M Buy
6,279,636
+170,174
+3% +$4.55M 0.09% 195
2025
Q4 		$134M Sell
6,109,462
-245,757
-4% -$5.59M 0.06% 237
2025
Q3 		$152M Sell
6,355,219
-98,885
-2% -$2.36M 0.07% 219
2025
Q2 		$145M Buy
6,454,104
+3,315
+0.1% +$73.4K 0.07% 218
2025
Q1 		$162M Buy
6,450,789
+53,914
+0.8% +$1.31M 0.09% 202
2024
Q4 		$150M Buy
6,396,875
+667,973
+12% +$17.4M 0.08% 225
2024
Q3 		$140M Sell
5,728,902
-566,538
-9% -$14.3M 0.07% 230
2024
Q2 		$160M Sell
6,295,440
-102,003
-2% -$2.6M 0.09% 203
2024
Q1 		$166M Sell
6,397,443
-84,289
-1% -$1.85M 0.09% 203
2023
Q4 		$138M Sell
6,481,732
-122,532
-2% -$2.68M 0.08% 219
2023
Q3 		$151M Sell
6,604,264
-241,435
-4% -$5.39M 0.1% 192
2023
Q2 		$143M Buy
6,845,699
+151,767
+2% +$3.14M 0.09% 206
2023
Q1 		$146M Sell
6,693,932
-583,409
-8% -$12.9M 0.1% 199
2022
Q4 		$171M Sell
7,277,341
-361,375
-5% -$8.81M 0.12% 179
2022
Q3 		$151M Sell
7,638,716
-1,067,046
-12% -$23.6M 0.11% 187
2022
Q2 		$183M Buy
8,705,762
+4,609,705
+113% +$115M 0.13% 178
2022
Q1 		$96.9M Sell
4,096,057
-12,419
-0.3% -$273K 0.05% 332
2021
Q4 		$77.5M Buy
4,108,476
+963,336
+31% +$19.1M 0.03% 418
2021
Q3 		$56M Buy
+3,145,140
New +$47.5M 0.02% 517
2020
Q2 		– Sell
-4,456,959
Closed -$17.8M – 1359
2020
Q1 		$17.8M Sell
4,456,959
-4,034,456
-48% -$34.7M 0.01% 700
2019
Q4 		$107M Buy
8,491,415
+1,186
+0% +$13.3K 0.05% 350
2019
Q3 		$94.2M Buy
8,490,229
+181,108
+2% +$1.94M 0.05% 388
2019
Q2 		$96.2M Sell
8,309,121
-18,152
-0.2% -$223K 0.05% 383
2019
Q1 		$99.9M Sell
8,327,273
-89,048
-1% -$1.08M 0.06% 380
2018
Q4 		$94.3M Buy
8,416,321
+1,217,340
+17% +$15.3M 0.06% 362
2018
Q3 		$108M Buy
7,198,981
+4,187,082
+139% +$54.7M 0.06% 377
2018
Q2 		$32.7M Buy
+3,011,899
New +$31.4M 0.02% 668

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
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
TD Asset Management
TD Asset Management Toronto, Ontario, Canada $115B AUM 41.58% 1-Year Est. Return

Janus Henderson Group's MGY Position: Q1 2026 in Review

Janus Henderson Group increased its Magnolia Oil & Gas (MGY) stake by 2.8% in Q1 2026, buying an estimated $4.55M and bringing the position to 6,279,636 shares worth $198M. The position accounts for 0.09% of the portfolio, ranked #195.

Janus Henderson Group first reported a position in MGY in Q2 2018 and has held it in 27 quarters since. 405 funds tracked by Wall St. Rank hold MGY as of Q1 2026.

  • Janus Henderson Group held 6,279,636 shares of Magnolia Oil & Gas worth $198M as of Q1 2026.
  • Janus Henderson Group bought 170,174 Magnolia Oil & Gas shares in Q1 2026, an estimated $4.55M.
  • Magnolia Oil & Gas made up 0.09% of Janus Henderson Group's portfolio in Q1 2026, its #195 holding.
  • Janus Henderson Group first reported a position in Magnolia Oil & Gas in Q2 2018 and has held it in 27 quarters since.
  • 405 funds tracked by Wall St. Rank held Magnolia Oil & Gas as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.