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 | $134K | Sell |
11,316
-252,046
| -96% | -$3.38M | ﹤0.01% | 4749 |
|
|
2025
Q4 | $4.27M | Buy |
263,362
+146,317
| +125% | +$2.43M | ﹤0.01% | 1399 |
|
|
2025
Q3 | $2.55M | Buy |
117,045
+64,211
| +122% | +$1.52M | ﹤0.01% | 2082 |
|
|
2025
Q2 | $1.27M | Buy |
+52,834
| New | +$778K | ﹤0.01% | 2526 |
|
|
2025
Q1 | – | Sell |
-31,987
| Closed | -$510K | – | 9204 |
|
|
2024
Q4 | $509K | Sell |
31,987
-56,172
| -64% | -$824K | ﹤0.01% | 3515 |
|
|
2024
Q3 | $1.22M | Buy |
88,159
+80,635
| +1,072% | +$1.1M | ﹤0.01% | 2733 |
|
|
2024
Q2 | $99K | Buy |
+7,524
| New | +$82.2K | ﹤0.01% | 5390 |
|
|
2023
Q3 | – | Sell |
-24,057
| Closed | -$259K | – | 9359 |
|
|
2023
Q2 | $328K | Buy |
24,057
+12,330
| +105% | +$137K | ﹤0.01% | 3739 |
|
|
2023
Q1 | $108K | Sell |
11,727
-27,701
| -70% | -$295K | ﹤0.01% | 5066 |
|
|
2022
Q4 | $417K | Buy |
+39,428
| New | +$360K | ﹤0.01% | 3364 |
|
|
2022
Q3 | – | Sell |
-30,590
| Closed | -$246K | – | 10499 |
|
|
2022
Q2 | $271K | Sell |
30,590
-27,180
| -47% | -$291K | ﹤0.01% | 4226 |
|
|
2022
Q1 | $763K | Sell |
57,770
-17,703
| -23% | -$239K | ﹤0.01% | 3268 |
|
|
2021
Q4 | $1.32M | Buy |
+75,473
| New | +$1.7M | ﹤0.01% | 2499 |
|
|
2021
Q2 | – | Sell |
-49,469
| Closed | -$1.68M | – | 10432 |
|
|
2021
Q1 | $2.06M | Buy |
49,469
+14,173
| +40% | +$614K | ﹤0.01% | 1574 |
|
|
2020
Q4 | $1.08M | Sell |
35,296
-10,009
| -22% | -$151K | ﹤0.01% | 2452 |
|
|
2020
Q3 | $314K | Buy |
+45,305
| New | +$303K | ﹤0.01% | 3551 |
|
|
2019
Q4 | – | Sell |
-8,875
| Closed | -$73K | – | 7686 |
|
|
2019
Q3 | $77K | Buy |
8,875
+2,350
| +36% | +$20.6K | ﹤0.01% | 4597 |
|
|
2019
Q2 | $41K | Buy |
6,525
+5,378
| +469% | +$33K | ﹤0.01% | 5033 |
|
|
2019
Q1 | $6K | Buy |
+1,147
| New | +$5.91K | ﹤0.01% | 6415 |
|
|
2018
Q2 | – | Sell |
-524
| Closed | -$1.25K | – | 7682 |
|
|
2018
Q1 | $0 | Sell |
524
-4,154
| -89% | -$7.87K | ﹤0.01% | 6569 |
|
|
2017
Q4 | $8K | Sell |
4,678
-847
| -15% | -$2.12K | ﹤0.01% | 4101 |
|
|
2017
Q3 | $21K | Buy |
5,525
+2,240
| +68% | +$9.54K | ﹤0.01% | 3102 |
|
|
2017
Q2 | $16K | Sell |
3,285
-1,362
| -29% | -$7.49K | ﹤0.01% | 3528 |
|
|
2017
Q1 | $27K | Buy |
4,647
+2,216
| +91% | +$17.3K | ﹤0.01% | 2946 |
|
|
2016
Q4 | $18K | Buy |
2,431
+2,413
| +13,406% | +$18.8K | ﹤0.01% | 3129 |
|
|
2016
Q3 | $0 | Sell |
18
-4,332
| -100% | -$46K | ﹤0.01% | 6192 |
|
|
2016
Q2 | $59K | Buy |
+4,350
| New | +$70K | ﹤0.01% | 1893 |
|
|
2015
Q4 | – | Sell |
-81
| Closed | -$1.25K | – | 5828 |
|
|
2015
Q3 | $1K | Buy |
+81
| New | +$1.24K | ﹤0.01% | 5068 |
|
|
2015
Q2 | – | Sell |
-609
| Closed | -$10.5K | – | 5580 |
|
|
2015
Q1 | $10K | Sell |
609
-7,251
| -92% | -$122K | ﹤0.01% | 2955 |
|
|
2014
Q4 | $127K | Buy |
+7,860
| New | +$101K | 0.02% | 805 |
|
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.