Simplex Trading’s MarketAxess Holdings MKTX Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q2 | $265K | Buy |
+2,336
| New | +$333K | ﹤0.01% | 4371 |
|
|
2026
Q1 | – | Sell |
-259
| Closed | -$45.4K | – | 9738 |
|
|
2025
Q4 | $46.9K | Sell |
259
-2,030
| -89% | -$346K | ﹤0.01% | 5713 |
|
|
2025
Q3 | $398K | Sell |
2,289
-230
| -9% | -$45K | ﹤0.01% | 4119 |
|
|
2025
Q2 | $562K | Sell |
2,519
-4,424
| -64% | -$972K | ﹤0.01% | 3381 |
|
|
2025
Q1 | $1.5M | Buy |
6,943
+6,246
| +896% | +$1.31M | ﹤0.01% | 2312 |
|
|
2024
Q4 | $157K | Buy |
+697
| New | +$183K | ﹤0.01% | 4747 |
|
|
2024
Q3 | – | Sell |
-3,816
| Closed | -$894K | – | 9142 |
|
|
2024
Q2 | $765K | Buy |
+3,816
| New | +$787K | ﹤0.01% | 3198 |
|
|
2024
Q1 | – | Sell |
-764
| Closed | -$180K | – | 9447 |
|
|
2023
Q4 | $223K | Sell |
764
-1,708
| -69% | -$413K | ﹤0.01% | 4564 |
|
|
2023
Q3 | $528K | Buy |
+2,472
| New | +$599K | ﹤0.01% | 3340 |
|
|
2022
Q4 | – | Sell |
-2,681
| Closed | -$690K | – | 9920 |
|
|
2022
Q3 | $596K | Buy |
+2,681
| New | +$688K | ﹤0.01% | 3261 |
|
|
2022
Q1 | – | Sell |
-37
| Closed | -$13.4K | – | 11023 |
|
|
2021
Q4 | $15K | Sell |
37
-2,792
| -99% | -$1.1M | ﹤0.01% | 8689 |
|
|
2021
Q3 | $1.31M | Sell |
2,829
-100
| -3% | -$45.9K | ﹤0.01% | 2712 |
|
|
2021
Q2 | $1.36M | Buy |
2,929
+781
| +36% | +$372K | ﹤0.01% | 2695 |
|
|
2021
Q1 | $1.07M | Buy |
2,148
+1,219
| +131% | +$650K | ﹤0.01% | 2321 |
|
|
2020
Q4 | $530K | Buy |
+929
| New | +$506K | ﹤0.01% | 3349 |
|
|
2019
Q4 | – | Sell |
-6,811
| Closed | -$2.5M | – | 7694 |
|
|
2019
Q3 | $2.23M | Buy |
6,811
+4,160
| +157% | +$1.49M | 0.01% | 1254 |
|
|
2019
Q2 | $852K | Sell |
2,651
-1,168
| -31% | -$338K | ﹤0.01% | 2050 |
|
|
2019
Q1 | $939K | Buy |
3,819
+268
| +8% | +$60.7K | ﹤0.01% | 2052 |
|
|
2018
Q4 | $750K | Buy |
3,551
+3,268
| +1,155% | +$676K | ﹤0.01% | 1884 |
|
|
2018
Q3 | $50K | Sell |
283
-557
| -66% | -$107K | ﹤0.01% | 5161 |
|
|
2018
Q2 | $166K | Sell |
840
-195
| -19% | -$40.4K | ﹤0.01% | 3706 |
|
|
2018
Q1 | $225K | Buy |
1,035
+259
| +33% | +$53.3K | 0.01% | 1161 |
|
|
2017
Q4 | $156K | Buy |
+776
| New | +$146K | 0.01% | 1465 |
|
|
2017
Q3 | – | Sell |
-2,047
| Closed | -$392K | – | 6333 |
|
|
2017
Q2 | $411K | Buy |
+2,047
| New | +$392K | 0.02% | 760 |
|
|
2017
Q1 | – | Sell |
-815
| Closed | -$148K | – | 6528 |
|
|
2016
Q4 | $119K | Buy |
+815
| New | +$129K | 0.01% | 1402 |
|
|
2016
Q3 | – | Sell |
-1,714
| Closed | -$278K | – | 6203 |
|
|
2016
Q2 | $249K | Buy |
1,714
+1,635
| +2,070% | +$217K | 0.02% | 870 |
|
|
2016
Q1 | $9K | Sell |
79
-489
| -86% | -$55.8K | ﹤0.01% | 3575 |
|
|
2015
Q4 | $63K | Buy |
568
+563
| +11,260% | +$57.6K | ﹤0.01% | 1736 |
|
|
2015
Q3 | $0 | Buy |
+5
| New | +$483 | ﹤0.01% | 5918 |
|
Other funds holding MKTX
NRCM
Simplex Trading's MKTX Position: Q2 2026 in Review
Simplex Trading opened a new position in MarketAxess Holdings (MKTX) in Q2 2026: 2,336 shares worth $265K. The stake represents ﹤0.01% of the portfolio and ranks #4371 among its holdings. This is a return to the name: Simplex Trading previously reported a position in MKTX as recently as Q4 2025.
Simplex Trading first reported a position in MKTX in Q3 2015 and has held it in 29 quarters since. The position peaked at $2.23M in Q3 2019. 396 funds tracked by Wall St. Rank hold MKTX as of Q2 2026.
- Simplex Trading held 2,336 shares of MarketAxess Holdings worth $265K as of Q2 2026.
- MarketAxess Holdings was a new Simplex Trading position in Q2 2026.
- MarketAxess Holdings made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #4371 holding.
- Simplex Trading first reported a position in MarketAxess Holdings in Q3 2015 and has held it in 29 quarters since.
- Simplex Trading's MarketAxess Holdings position peaked at $2.23M in Q3 2019.
- 396 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q2 2026.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.