William Blair & Company’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 | $237K | Buy |
+2,085
| New | +$297K | ﹤0.01% | 1513 |
|
|
2025
Q4 | – | Sell |
-1,687
| Closed | -$294K | – | 1917 |
|
|
2025
Q3 | $294K | Buy |
1,687
+400
| +31% | +$78.2K | ﹤0.01% | 1311 |
|
|
2025
Q2 | $287K | Buy |
+1,287
| New | +$283K | ﹤0.01% | 1285 |
|
|
2024
Q1 | – | Sell |
-955
| Closed | -$280K | – | 1830 |
|
|
2023
Q4 | $280K | Buy |
+955
| New | +$231K | ﹤0.01% | 1283 |
|
|
2023
Q3 | – | Sell |
-2,062
| Closed | -$539K | – | 1823 |
|
|
2023
Q2 | $539K | Sell |
2,062
-689
| -25% | -$206K | ﹤0.01% | 1030 |
|
|
2023
Q1 | $1.08M | Buy |
2,751
+299
| +12% | +$106K | ﹤0.01% | 813 |
|
|
2022
Q4 | $684K | Buy |
2,452
+84
| +4% | +$21.6K | ﹤0.01% | 948 |
|
|
2022
Q3 | $527K | Sell |
2,368
-228
| -9% | -$58.5K | ﹤0.01% | 1020 |
|
|
2022
Q2 | $665K | Sell |
2,596
-2,587
| -50% | -$707K | ﹤0.01% | 975 |
|
|
2022
Q1 | $1.76M | Sell |
5,183
-698
| -12% | -$253K | 0.01% | 730 |
|
|
2021
Q4 | $2.42M | Sell |
5,881
-249
| -4% | -$98.2K | 0.01% | 676 |
|
|
2021
Q3 | $2.58M | Sell |
6,130
-95
| -2% | -$43.6K | 0.01% | 635 |
|
|
2021
Q2 | $2.89M | Sell |
6,225
-230
| -4% | -$109K | 0.01% | 597 |
|
|
2021
Q1 | $3.21M | Sell |
6,455
-608
| -9% | -$324K | 0.01% | 555 |
|
|
2020
Q4 | $4.03M | Sell |
7,063
-816
| -10% | -$444K | 0.01% | 478 |
|
|
2020
Q3 | $3.79M | Sell |
7,879
-866
| -10% | -$428K | 0.02% | 453 |
|
|
2020
Q2 | $4.38M | Sell |
8,745
-693
| -7% | -$323K | 0.02% | 404 |
|
|
2020
Q1 | $3.14M | Sell |
9,438
-532
| -5% | -$185K | 0.02% | 431 |
|
|
2019
Q4 | $3.78M | Buy |
9,970
+8,393
| +532% | +$3.08M | 0.02% | 457 |
|
|
2019
Q3 | $516K | Sell |
1,577
-2,864
| -64% | -$1.03M | ﹤0.01% | 931 |
|
|
2019
Q2 | $1.43M | Sell |
4,441
-455
| -9% | -$132K | 0.01% | 665 |
|
|
2019
Q1 | $1.21M | Sell |
4,896
-445
| -8% | -$101K | 0.01% | 685 |
|
|
2018
Q4 | $1.13M | Sell |
5,341
-1,362
| -20% | -$282K | 0.01% | 660 |
|
|
2018
Q3 | $1.2M | Sell |
6,703
-67,815
| -91% | -$13M | 0.01% | 689 |
|
|
2018
Q2 | $14.7M | Buy |
74,518
+2,549
| +4% | +$528K | 0.1% | 192 |
|
|
2018
Q1 | $15.6M | Sell |
71,969
-20,367
| -22% | -$4.19M | 0.11% | 180 |
|
|
2017
Q4 | $18.6M | Buy |
92,336
+23,438
| +34% | +$4.42M | 0.13% | 173 |
|
|
2017
Q3 | $12.7M | Sell |
68,898
-1,147
| -2% | -$219K | 0.1% | 207 |
|
|
2017
Q2 | $14.1M | Sell |
70,045
-10,460
| -13% | -$2M | 0.11% | 203 |
|
|
2017
Q1 | $15.7M | Sell |
80,505
-3,053
| -4% | -$553K | 0.13% | 178 |
|
|
2016
Q4 | $12.3M | Buy |
83,558
+2,271
| +3% | +$361K | 0.11% | 196 |
|
|
2016
Q3 | $13.5M | Buy |
81,287
+65,808
| +425% | +$10.7M | 0.12% | 189 |
|
|
2016
Q2 | $2.25M | Buy |
+15,479
| New | +$2.06M | 0.02% | 453 |
|
|
2015
Q3 | – | Sell |
-4,527
| Closed | -$419K | – | 1490 |
|
|
2015
Q2 | $419K | Buy |
+4,527
| New | +$399K | ﹤0.01% | 1820 |
|
Other funds holding MKTX
NRCM
William Blair & Company's MKTX Position: Q2 2026 in Review
William Blair & Company opened a new position in MarketAxess Holdings (MKTX) in Q2 2026: 2,085 shares worth $237K. The stake represents ﹤0.01% of the portfolio and ranks #1513 among its holdings. This is a return to the name: William Blair & Company previously reported a position in MKTX as recently as Q3 2025.
William Blair & Company first reported a position in MKTX in Q2 2015 and has held it in 34 quarters since. The position peaked at $18.6M in Q4 2017. 396 funds tracked by Wall St. Rank hold MKTX as of Q2 2026.
- William Blair & Company held 2,085 shares of MarketAxess Holdings worth $237K as of Q2 2026.
- MarketAxess Holdings was a new William Blair & Company position in Q2 2026.
- MarketAxess Holdings made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1513 holding.
- William Blair & Company first reported a position in MarketAxess Holdings in Q2 2015 and has held it in 34 quarters since.
- William Blair & Company's MarketAxess Holdings position peaked at $18.6M in Q4 2017.
- 396 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q2 2026.
Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.