MKTX
MARKETAXESS HOLDINGS INCData as of 2026 Q2 (06-30) · 13F snapshot
Summary
MARKETAXESS HOLDINGS INC (MKTX) is held as common stock by 7 tracked hedge-fund managers, with a combined reported value of ~$108.50M; the largest are Ken Griffin, Renaissance Technologies, Paul Tudor Jones. 3 tracked managers also disclosed PUT or CALL positions, reported separately below. This quarter: 1 new, 3 added, 3 trimmed. 20 public STOCK Act / OGE trade disclosures are on record. Data as of 2026 Q2, from public SEC 13F filings, delayed up to ~45 days.
Attention · MediumThis quarter · Mixed
Common-stock holders73 also report options
Congress trades20
Price$163.94vs quarter-end+44.45%
Sectors0
This quarter's moves
Top holderNew1
Added3
Trimmed / sold3
Ken GriffinCommon-stock positions
PUT and CALL disclosures are excluded from these holder counts and values.
| Investor | Value | % of portfolio | Action |
|---|
PUT / CALL disclosures
Reported separately: 13F option values are not common-stock ownership and do not reveal the full strategy or economic exposure.
Value $118.79M— of portfolio1,046,7002026 Q2
Value $4.20M— of portfolio37,0002026 Q2
Value $3.38M— of portfolio29,8002026 Q2
Value $726.3K— of portfolio6,4002026 Q2
Value $624.2K— of portfolio5,5002026 Q2
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Izzy EnglanderCALL | $118.79M | — | — |
| Ken GriffinCALL | $4.20M | — | — |
| Ken GriffinPUT | $3.38M | — | — |
| Paul Tudor JonesPUT | $726.3K | — | — |
| Paul Tudor JonesCALL | $624.2K | — | — |
Public SEC 13F filings may appear up to 45 days after quarter-end; STOCK Act / OGE trade filings are generally due within 45 days but may be late. Partial data only — research, not investment advice.