Simplex Trading
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Simplex Trading’s Magnolia Oil & Gas MGY Stock Holding History

Simplex Trading’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 		$148K Buy
4,700
+200
+4% +$5.35K ﹤0.01% 4646
2025
Q4 		$98.5K Sell
4,500
-4,900
-52% -$111K ﹤0.01% 5017
2025
Q3 		$224K Buy
9,400
+8,800
+1,467% +$210K ﹤0.01% 4799
2025
Q2 		$13K Sell
600
-3,500
-85% -$77.5K ﹤0.01% 7115
2025
Q1 		$103K Buy
+4,100
New +$99.4K ﹤0.01% 5023
2024
Q4 		– Sell
-5,000
Closed -$122K – 9186
2024
Q3 		$122K Sell
5,000
-1,900
-28% -$47.9K ﹤0.01% 5029
2024
Q2 		$174K Sell
6,900
-17,700
-72% -$452K ﹤0.01% 4789
2024
Q1 		$638K Buy
24,600
+3,600
+17% +$79K ﹤0.01% 3601
2023
Q4 		$447K Sell
21,000
-6,300
-23% -$138K ﹤0.01% 3812
2023
Q3 		$625K Buy
27,300
+16,500
+153% +$369K ﹤0.01% 3170
2023
Q2 		$225K Sell
10,800
-15,700
-59% -$325K ﹤0.01% 4170
2023
Q1 		$579K Buy
26,500
+18,800
+244% +$417K ﹤0.01% 3116
2022
Q4 		$180K Sell
7,700
-18,000
-70% -$439K ﹤0.01% 4343
2022
Q3 		$509K Buy
25,700
+3,400
+15% +$75.3K ﹤0.01% 3450
2022
Q2 		$468K Buy
22,300
+17,400
+355% +$435K ﹤0.01% 3515
2022
Q1 		$115K Sell
4,900
-700
-13% -$15.4K ﹤0.01% 5949
2021
Q4 		$105K Hold
5,600
– – ﹤0.01% 6185
2021
Q3 		$90K Sell
5,600
-1,000
-15% -$15.1K ﹤0.01% 6766
2021
Q2 		$103K Buy
6,600
+6,418
+3,526% +$82.4K ﹤0.01% 6690
2021
Q1 		$208K Buy
+182
New +$1.9K ﹤0.01% 4683
2020
Q3 		– Sell
-197
Closed -$119K – 8188
2020
Q2 		$119K Sell
197
-183
-48% -$999 ﹤0.01% 4617
2020
Q1 		$152K Buy
380
+366
+2,614% +$3.15K ﹤0.01% 3910
2019
Q4 		$17K Buy
+14
New +$157 ﹤0.01% 6069
2019
Q3 		– Sell
-10
Closed -$11K – 7630
2019
Q2 		$11K Sell
10
-48
-83% -$589 ﹤0.01% 6049
2019
Q1 		$69K Sell
58
-511
-90% -$6.22K ﹤0.01% 4719
2018
Q4 		$637K Buy
569
+246
+76% +$3.1K ﹤0.01% 2010
2018
Q3 		$484K Buy
+323
New +$4.22K ﹤0.01% 2663

Other funds holding MGY

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
NAMI
Nomura Asset Management International Philadelphia, Pennsylvania $58.4B AUM

Simplex Trading's MGY Position: Q1 2026 in Review

Simplex Trading opened a new position in Magnolia Oil & Gas (MGY) in Q1 2026: 16,976 shares worth $536K. The stake represents ﹤0.01% of the portfolio and ranks #3167 among its holdings. This is a return to the name: Simplex Trading previously reported a position in MGY as recently as Q3 2025.

Simplex Trading first reported a position in MGY in Q1 2019 and has held it in 19 quarters since. The position peaked at $1.47M in Q2 2022. 404 funds tracked by Wall St. Rank hold MGY as of Q1 2026.

  • Simplex Trading held 16,976 shares of Magnolia Oil & Gas worth $536K as of Q1 2026.
  • Magnolia Oil & Gas was a new Simplex Trading position in Q1 2026.
  • Magnolia Oil & Gas made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #3167 holding.
  • Simplex Trading first reported a position in Magnolia Oil & Gas in Q1 2019 and has held it in 19 quarters since.
  • Simplex Trading's Magnolia Oil & Gas position peaked at $1.47M in Q2 2022.
  • 404 funds tracked by Wall St. Rank held Magnolia Oil & Gas as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.