Simplex Trading’s Magnite MGNI Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $322K | Sell |
27,100
-250,000
| -90% | -$3.35M | ﹤0.01% | 3747 |
|
|
2025
Q4 | $4.5M | Sell |
277,100
-89,000
| -24% | -$1.48M | ﹤0.01% | 1356 |
|
|
2025
Q3 | $7.97M | Buy |
366,100
+94,200
| +35% | +$2.22M | ﹤0.01% | 1115 |
|
|
2025
Q2 | $6.56M | Buy |
271,900
+22,800
| +9% | +$336K | ﹤0.01% | 1157 |
|
|
2025
Q1 | $2.84M | Sell |
249,100
-149,600
| -38% | -$2.39M | ﹤0.01% | 1712 |
|
|
2024
Q4 | $6.35M | Sell |
398,700
-46,600
| -10% | -$684K | ﹤0.01% | 1305 |
|
|
2024
Q3 | $6.17M | Buy |
445,300
+238,900
| +116% | +$3.26M | ﹤0.01% | 1343 |
|
|
2024
Q2 | $2.74M | Buy |
206,400
+71,200
| +53% | +$778K | ﹤0.01% | 1927 |
|
|
2024
Q1 | $1.45M | Sell |
135,200
-156,500
| -54% | -$1.56M | ﹤0.01% | 2731 |
|
|
2023
Q4 | $2.72M | Sell |
291,700
-5,300
| -2% | -$41.9K | ﹤0.01% | 2097 |
|
|
2023
Q3 | $2.24M | Buy |
297,000
+156,200
| +111% | +$1.68M | ﹤0.01% | 1975 |
|
|
2023
Q2 | $1.92M | Buy |
140,800
+67,700
| +93% | +$754K | ﹤0.01% | 2004 |
|
|
2023
Q1 | $676K | Sell |
73,100
-96,000
| -57% | -$1.02M | ﹤0.01% | 2967 |
|
|
2022
Q4 | $1.79M | Sell |
169,100
-72,700
| -30% | -$664K | ﹤0.01% | 1956 |
|
|
2022
Q3 | $1.59M | Buy |
241,800
+43,100
| +22% | +$347K | ﹤0.01% | 2175 |
|
|
2022
Q2 | $1.76M | Sell |
198,700
-24,900
| -11% | -$267K | ﹤0.01% | 2002 |
|
|
2022
Q1 | $2.95M | Buy |
223,600
+69,100
| +45% | +$932K | ﹤0.01% | 1712 |
|
|
2021
Q4 | $2.7M | Buy |
154,500
+27,500
| +22% | +$620K | ﹤0.01% | 1731 |
|
|
2021
Q3 | $4.4M | Buy |
127,000
+1,500
| +1% | +$45.1K | ﹤0.01% | 1307 |
|
|
2021
Q2 | $4.25M | Buy |
125,500
+124,049
| +8,549% | +$4.2M | ﹤0.01% | 1333 |
|
|
2021
Q1 | $6.04M | Buy |
1,451
+249
| +21% | +$10.8K | 0.01% | 689 |
|
|
2020
Q4 | $3.69M | Buy |
1,202
+854
| +245% | +$12.9K | ﹤0.01% | 1217 |
|
|
2020
Q3 | $241K | Buy |
348
+189
| +119% | +$1.26K | ﹤0.01% | 3873 |
|
|
2020
Q2 | $13K | Sell |
159
-284
| -64% | -$1.77K | ﹤0.01% | 6496 |
|
|
2020
Q1 | $245K | Buy |
443
+356
| +409% | +$3.27K | ﹤0.01% | 3356 |
|
|
2019
Q4 | $70K | Buy |
87
+48
| +123% | +$395 | ﹤0.01% | 4880 |
|
|
2019
Q3 | $33K | Buy |
39
+16
| +70% | +$140 | ﹤0.01% | 5404 |
|
|
2019
Q2 | $14K | Sell |
23
-192
| -89% | -$1.18K | ﹤0.01% | 5893 |
|
|
2019
Q1 | $130K | Sell |
215
-161
| -43% | -$829 | ﹤0.01% | 4065 |
|
|
2018
Q4 | $140K | Sell |
376
-345
| -48% | -$1.32K | ﹤0.01% | 3510 |
|
|
2018
Q3 | $259K | Buy |
721
+624
| +643% | +$2.21K | ﹤0.01% | 3348 |
|
|
2018
Q2 | $27K | Buy |
+97
| New | +$231 | ﹤0.01% | 5625 |
|
|
2017
Q3 | – | Sell |
-684
| Closed | -$2K | – | 6323 |
|
|
2017
Q2 | $2K | Sell |
684
-217
| -24% | -$1.19K | ﹤0.01% | 5285 |
|
|
2017
Q1 | $12K | Buy |
+901
| New | +$7.02K | ﹤0.01% | 3801 |
|
|
2016
Q2 | – | Sell |
-137
| Closed | -$36K | – | 6194 |
|
|
2016
Q1 | $36K | Buy |
+137
| New | +$2.1K | ﹤0.01% | 2255 |
|
|
2015
Q4 | – | Sell |
-39
| Closed | -$1K | – | 5827 |
|
|
2015
Q3 | $1K | Buy |
+39
| New | +$595 | ﹤0.01% | 5067 |
|
Other funds holding MGNI
VPM
VCM
N
Simplex Trading's MGNI Position: Q1 2026 in Review
Simplex Trading reduced its Magnite (MGNI) stake by 96% in Q1 2026, selling an estimated $3.38M and leaving 11,316 shares worth $134K. The position accounts for ﹤0.01% of the portfolio, ranked #4749.
Simplex Trading first reported a position in MGNI in Q4 2014 and has held it in 30 quarters since. The position peaked at $4.27M in Q4 2025. 297 funds tracked by Wall St. Rank hold MGNI as of Q1 2026.
- Simplex Trading held 11,316 shares of Magnite worth $134K as of Q1 2026.
- Simplex Trading sold 252,046 Magnite shares in Q1 2026, an estimated $3.38M.
- Magnite made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #4749 holding.
- Simplex Trading first reported a position in Magnite in Q4 2014 and has held it in 30 quarters since.
- Simplex Trading's Magnite position peaked at $4.27M in Q4 2025.
- 297 funds tracked by Wall St. Rank held Magnite as of Q1 2026.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.