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 | $185K | Sell |
15,600
-153,500
| -91% | -$2.06M | ﹤0.01% | 4392 |
|
|
2025
Q4 | $2.74M | Sell |
169,100
-15,600
| -8% | -$259K | ﹤0.01% | 1726 |
|
|
2025
Q3 | $4.02M | Buy |
184,700
+4,000
| +2% | +$94.5K | ﹤0.01% | 1672 |
|
|
2025
Q2 | $4.36M | Buy |
180,700
+96,200
| +114% | +$1.42M | ﹤0.01% | 1466 |
|
|
2025
Q1 | $964K | Sell |
84,500
-4,600
| -5% | -$73.3K | ﹤0.01% | 2738 |
|
|
2024
Q4 | $1.42M | Buy |
89,100
+35,600
| +67% | +$522K | ﹤0.01% | 2518 |
|
|
2024
Q3 | $740K | Sell |
53,500
-47,000
| -47% | -$640K | ﹤0.01% | 3206 |
|
|
2024
Q2 | $1.33M | Buy |
100,500
+67,700
| +206% | +$740K | ﹤0.01% | 2609 |
|
|
2024
Q1 | $352K | Sell |
32,800
-11,200
| -25% | -$112K | ﹤0.01% | 4218 |
|
|
2023
Q4 | $410K | Buy |
44,000
+4,000
| +10% | +$31.6K | ﹤0.01% | 3910 |
|
|
2023
Q3 | $301K | Buy |
40,000
+22,500
| +129% | +$243K | ﹤0.01% | 3938 |
|
|
2023
Q2 | $238K | Sell |
17,500
-26,600
| -60% | -$296K | ﹤0.01% | 4100 |
|
|
2023
Q1 | $408K | Buy |
44,100
+28,600
| +185% | +$305K | ﹤0.01% | 3480 |
|
|
2022
Q4 | $164K | Sell |
15,500
-21,700
| -58% | -$198K | ﹤0.01% | 4479 |
|
|
2022
Q3 | $244K | Sell |
37,200
-18,200
| -33% | -$146K | ﹤0.01% | 4356 |
|
|
2022
Q2 | $491K | Sell |
55,400
-9,700
| -15% | -$104K | ﹤0.01% | 3469 |
|
|
2022
Q1 | $859K | Sell |
65,100
-27,700
| -30% | -$374K | ﹤0.01% | 3097 |
|
|
2021
Q4 | $1.62M | Buy |
92,800
+43,700
| +89% | +$985K | ﹤0.01% | 2265 |
|
|
2021
Q3 | $1.7M | Buy |
49,100
+500
| +1% | +$15K | ﹤0.01% | 2377 |
|
|
2021
Q2 | $1.64M | Buy |
48,600
+47,707
| +5,342% | +$1.62M | ﹤0.01% | 2442 |
|
|
2021
Q1 | $3.71M | Buy |
893
+113
| +14% | +$4.89K | 0.01% | 1056 |
|
|
2020
Q4 | $2.4M | Buy |
780
+738
| +1,757% | +$11.2K | ﹤0.01% | 1588 |
|
|
2020
Q3 | $29K | Buy |
+42
| New | +$281 | ﹤0.01% | 6103 |
|
|
2020
Q2 | – | Sell |
-20
| Closed | -$11K | – | 8042 |
|
|
2020
Q1 | $11K | Sell |
20
-77
| -79% | -$708 | ﹤0.01% | 6417 |
|
|
2019
Q4 | $79K | Buy |
97
+94
| +3,133% | +$773 | ﹤0.01% | 4749 |
|
|
2019
Q3 | $2K | Sell |
3
-222
| -99% | -$1.95K | ﹤0.01% | 6931 |
|
|
2019
Q2 | $143K | Sell |
225
-24
| -10% | -$147 | ﹤0.01% | 3819 |
|
|
2019
Q1 | $151K | Buy |
249
+214
| +611% | +$1.1K | ﹤0.01% | 3909 |
|
|
2018
Q4 | $13K | Hold |
35
| – | – | ﹤0.01% | 5670 |
|
|
2018
Q3 | $12K | Buy |
35
+20
| +133% | +$71 | ﹤0.01% | 6318 |
|
|
2018
Q2 | $4K | Buy |
+15
| New | +$36 | ﹤0.01% | 6809 |
|
|
2018
Q1 | – | Sell |
-20
| Closed | -$5K | – | 6570 |
|
|
2017
Q4 | $5K | Sell |
20
-11
| -35% | -$27 | ﹤0.01% | 4521 |
|
|
2017
Q3 | $3K | Sell |
31
-33
| -52% | -$140 | ﹤0.01% | 4807 |
|
|
2017
Q2 | $5K | Buy |
64
+31
| +94% | +$170 | ﹤0.01% | 4592 |
|
|
2017
Q1 | $5K | Buy |
33
+21
| +175% | +$164 | ﹤0.01% | 4593 |
|
|
2016
Q4 | $1K | Sell |
12
-12
| -50% | -$94 | ﹤0.01% | 5436 |
|
|
2016
Q3 | $1K | Buy |
+24
| New | +$255 | ﹤0.01% | 5370 |
|
|
2015
Q4 | – | Sell |
-13
| Closed | -$1K | – | 5829 |
|
|
2015
Q3 | $1K | Buy |
+13
| New | +$198 | ﹤0.01% | 5069 |
|
|
2015
Q1 | – | Sell |
-29
| Closed | -$1K | – | 5326 |
|
|
2014
Q4 | $1K | Buy |
+29
| New | +$374 | ﹤0.01% | 4178 |
|
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.