Security key
57060D108
MARKETAXESS HOLDINGS INC - Common Stock, $0.003 par value (MKTX)
CUSIP: 57060D108
Q2 2025 13F Holders as of 30 Jun 2025
- Security type / class
- Equity / Common Stock, $0.003 par value
- Total 13F shares
- 36,906,141
- Total 13F value
- $8,238,737,302
- Share change
- +293,810
- Put/Call ratio
- 13%
- SEC-reported price per share
- $223.34
- Number of holders
- 521
- Value change
- +$69,030,421
- Number of buys
- 305
- Number of sells
- 216
- Shares outstanding
- 35,578,748
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2025
Institutions
521
Top holders
10
MKTX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
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
GUARDIAN CAPITAL LP
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
15/15
Latest evidence
14 May 2025
13D/G
3/4/5
13F
Lead comparable stake: 4.8%
13D/G row: GUARDIAN CAPITAL LP
Showing 1-6 of 15 holder rows.
Quick read
GUARDIAN CAPITAL LP leads the comparable SEC ownership view at 4.8%.
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.
Open SEC evidence
Opens GUARDIAN CAPITAL LP's linked filing trail.
Comparable ownership
Top 5
GUARDIAN CAPITAL LP
4.8%
Christophe Pierre Daniel Roupie
0.02%
Michael R. Cianciulli
0%
VANGUARD GROUP INC
12%
BlackRock, Inc.
7.3%
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 |
|---|---|---|---|---|---|
| GUARDIAN CAPITAL LP |
13D/G
|
4.8%
|
$391,918,458
1,789,582 shares
|
$0 | 31 Dec 2024 |
| Christophe Pierre Daniel Roupie |
3/4/5
Head of EMEA and APAC
|
0.02%
|
$1,727,291
8,208 shares
|
— | 14 May 2025 |
| Michael R. Cianciulli |
3/4/5
Head of Ext Rep & Comp Accting
|
0%
|
$246,165
1,155 shares
|
— | 01 Apr 2025 |
| VANGUARD GROUP INC |
13F
Company
|
12%
|
$953,483,874
4,407,136 shares
|
— | 31 Mar 2025 |
| BlackRock, Inc. |
13F
Company
|
7.3%
|
$563,677,413
2,605,396 shares
|
— | 31 Mar 2025 |
| T. Rowe Price Investment Management, Inc. |
13F
Company
|
6.5%
|
$502,585,000
2,323,015 shares
|
— | 31 Mar 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 Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
521
Shares
36,906,141
Rows available
521
| 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 Q2 2025 vs Q1 2025 Across Filers
Q1 2025 holders
504
Q2 2025 holders
521
Holder diff
17
| Investor | Q1 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend