MarketAxess Holdings Inc.
MarketAxess Holdings Inc. (MKTX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · MKTX · as of Mar 31, 2025
Ownership Breakdown
530
Institutional Holders
▲ 2 vs Q4
$8.06B
Total Inst. Value
▼ $461.03M vs Q4
35.54M
Shares Outstanding
freeFloat 99.11%
37.24M
13F Shares Held
▼ 450,181 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
MKTX largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC security brokers, dealers & flotation companies | 4.41M | 11.79% | 11.79% | $953.48B | May 9, 2025 | ▼ 27.8K |
BLACKROCK, INC. security brokers, dealers & flotation companies | 2.61M | 6.97% | 6.97% | $563.68B | May 2, 2025 | ▼ 558.5K |
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. security brokers, dealers & flotation companies | 2.32M | 6.21% | 6.21% | $502.58B | May 14, 2025 | ▲ 24.6K |
FMR LLC security brokers, dealers & flotation companies | 2.19M | 5.86% | 5.86% | $473.79B | May 12, 2025 | ▼ 110.6K |
VAN ECK ASSOCIATES CORP security brokers, dealers & flotation companies | 2.01M | 5.37% | 5.37% | $433.98B | May 15, 2025 | ▲ 5.2K |
GUARDCAP ASSET MANAGEMENT LTD security brokers, dealers & flotation companies | 1.52M | 4.07% | 4.07% | $329.50B | May 14, 2025 | ▼ 240.2K |
STATE STREET CORP security brokers, dealers & flotation companies | 1.47M | 3.92% | 3.92% | $317.04B | May 15, 2025 | ▼ 164.1K |
PRIMECAP MANAGEMENT CO/CA/ security brokers, dealers & flotation companies | 1.36M | 3.64% | 3.64% | $294.56B | May 9, 2025 | ▼ 7.6K |
GEODE CAPITAL MANAGEMENT, LLC security brokers, dealers & flotation companies | 1.13M | 3.04% | 3.04% | $245.22B | May 13, 2025 | ▲ 21.4K |
INVESCO LTD. security brokers, dealers & flotation companies | 904.2K | 2.42% | 2.42% | $195.62B | May 12, 2025 | ▼ 140.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
26
Increased
+2.75M shares1
New Positions
first time holders23
Decreased
−2.37M shares0
Sold Out
fully exitedNet shares change (top 50)
+383.1K
+2.75M / −2.37M
Net new holders
+4
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
MKTX insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
1
Buy transactions
3
Sell transactions
0.33
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Pintoff Scott General Counsel and Secretary | May 11, 2026 | Sale | 100 | $146.99 | $14.7K | 11.9K | Form 4 ↗ |
Quan William Chief Technology Officer | May 1, 2026 | Award | 218 | — | — | 218 | Form 4 ↗ |
Pintoff Scott General Counsel and Secretary | Apr 10, 2026 | Sale | 100 | $171.96 | $17.2K | 12.0K | Form 4 ↗ |
CONCANNON CHRISTOPHER R Chief Executive Officer | Apr 3, 2026 | Tax Withhold | 349 | $171.46 | $59.8K | 53.6K | Form 4 ↗ |
Pintoff Scott General Counsel and Secretary | Mar 10, 2026 | Sale | 100 | $184.93 | $18.5K | 12.1K | Form 4 ↗ |
Cifu Douglas A director | Mar 1, 2026 | Award | 259 | — | — | 259 | Form 4 ↗ |
SCHICIANO KENNETH T director | Mar 1, 2026 | Award | 259 | — | — | 555 | Form 4 ↗ |
Panchal Naineshkumar Shantilal Chief Information Officer | Mar 1, 2026 | Tax Withhold | 1,470 | $192.00 | $282.2K | 11.3K | Form 4 ↗ |
CONCANNON CHRISTOPHER R Chief Executive Officer | Feb 15, 2026 | Award | 6,588 | — | — | 55.7K | Form 4 ↗ |
CONCANNON CHRISTOPHER R Chief Executive Officer | Feb 15, 2026 | Tax Withhold | 1,750 | $179.36 | $313.9K | 53.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
MarketAxess Holdings Inc. (MKTX) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 0.89%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of MarketAxess Holdings Inc. is VANGUARD GROUP INC, holding approximately 4.41 million shares — equal to 11.79% of outstanding shares — as of March 31, 2025.
A total of 530 institutional investors currently hold MKTX stock, with a combined institutional value of approximately $8.06 billion as of the most recent 13F filing period.
Frequently asked questions
MKTX ownershipMarketAxess Holdings Inc. (MKTX) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is VANGUARD GROUP INC with a 11.79% stake. Company insiders hold 0.89%. Data sourced from SEC Form 13F as of March 31, 2025.