Security key
57060D108
MARKETAXESS HOLDINGS INC - Common Stock, $0.003 par value (MKTX)
CUSIP: 57060D108
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock, $0.003 par value
- Total 13F shares
- 36,512,510
- Total 13F value
- $6,617,255,443
- Share change
- +1,666,318
- Put/Call ratio
- 65%
- SEC-reported price per share
- $181.25
- Number of holders
- 484
- Value change
- +$306,972,216
- Number of buys
- 257
- Number of sells
- 241
- Shares outstanding
- 35,578,748
Holder snapshot
7 signals
Show 1 more signal
Security identity
1 source field
Report period
Q4 2025
Institutions
484
Top holders
10
MKTX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
MARKETAXESS HOLDINGS INC SEC filings
MARKETAXESS HOLDINGS INC company facts
Broader feeds
Reporting periods
Holder history for CUSIP 57060D108
Recent filing periods:
Ownership snapshot
Top reported holders of MKTX - MARKETAXESS HOLDINGS INC - Common Stock, $0.003 par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
PRIMECAP MANAGEMENT CO/CA/
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
15/15
Latest evidence
31 Dec 2025
13D/G
13F
3/4/5
Lead comparable stake: 8.5%
13D/G row: PRIMECAP MANAGEMENT CO/CA/
Showing 1-6 of 15 holder rows.
Quick read
PRIMECAP MANAGEMENT CO/CA/ leads the comparable SEC ownership view at 8.5%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Comparable ownership
Top 5
PRIMECAP MANAGEMENT CO/CA/
8.5%
AQR CAPITAL MANAGEMENT LLC
6.9%
GUARDIAN CAPITAL LP
4.8%
T. Rowe Price Investment Manageme...
3.7%
Stephen P. Casper
0.15%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| PRIMECAP MANAGEMENT CO/CA/ |
13D/G
13F
Company
|
8.5%
|
$575,545,781
3,175,425 shares
|
+$171,250,438 | 31 Dec 2025 |
| AQR CAPITAL MANAGEMENT LLC |
13D/G
13F
Company
|
6.9%
|
$463,655,081
2,558,097 shares
|
$0 | 31 Dec 2025 |
| GUARDIAN CAPITAL LP |
13D/G
|
4.8%
|
$391,918,458
1,789,582 shares
|
$0 | 31 Dec 2024 |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
Company
|
3.7%
from 13D/G
|
$238,844,000
1,370,694 shares
|
— | 30 Sep 2025 |
| Stephen P. Casper |
3/4/5
Director
|
0.15%
|
$10,136,563
53,193 shares
|
-$298,544 | 08 Sep 2025 |
| Dean Berry |
3/4/5
Group COO & CEO, EMEA & APAC
|
0.07%
|
$4,895,618
26,017 shares
|
— | 01 Oct 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
484
Shares
36,512,510
Rows available
484
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
444
Q4 2025 holders
484
Holder diff
40
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend