MKTX — MARKETAXESS HOLDINGS INCToday's name, from the SEC's present-day ticker list — a present-day mapping, not the name as of each filing.

Congress trades
20
all time
Members · 12m
1
0 buys · 1 sells · by trade date
Latest filing
05-19
2026-05-19
Rows filed past the STOCK Act's 45-day window, stated on the row, never editorialised; both dates and the receipt stay on every row.
3
13F holders
422
all listed · 2026-03-31
Congress: statutory ranges, filed up to 45 days after the trade · 13F: quarter-end snapshots, filed up to 45 days lateras of 2026-10-29
Congress 20Institutional 422

Congress · disclosure timeline

By trade date · 24 months · 3 rows ▲ buy, ▼ sell; height = lower bound (log scale). Trade date, not filing date — the filing lag is in the table below.

3 dated disclosures in the window, placed by trade date; magnitudes are the disclosed lower bounds, against gridlines at $15K, $250K, $5M.

Members active in MKTX

12 months · most active first Rows = number of disclosures, not dollars. Net = lower bound of the net range. Committees as of each member's latest trade in the window (roster snapshot 2026-10-29).
Members disclosing MKTX in the trailing 12 months
MemberRowsNet disclosed flow for this ticker: purchases minus sales, computed as a net range on the disclosed amounts. A lower bound is provable, never a point.Number of committees the member sat on as of their latest trade date in the window, from the cc0-legislators roster snapshot. Context, never an allegation; jurisdiction overlap needs the sector join.
Josh Gottheimer D–NJ-51−$15.0K to −$1.0K2

1 member

Congressional disclosures

Newest filed firstAll 20 rows ↗
Latest congressional filings mentioning MKTX
FiledMemberSide · OwnerTraded · LagAmountRange · FlagsSrc
2026-05-19Josh Gottheimer D–NJ-5SELL JT (jointly owned)Traded 04-09 +40d$1K–$15K
2025-03-12Julie Johnson D–TX-32SELL JT (jointly owned)Traded 02-12 +28d$1K–$15K
2025-02-12Julie Johnson D–TX-32BUY JT (jointly owned)Traded 01-15 +28d$1K–$15K
2023-08-13Daniel S. Goldman D–NY-10SELLTraded 07-12 +32d$1K–$15K
2023-05-19Daniel S. Goldman D–NY-10BUYTraded 04-10 +39d$1K–$15K
2022-11-10Tommy Tuberville R–ALSELL JT (jointly owned)Traded 10-05 +36d$1K–$15K
2021-12-13Josh Gottheimer D–NJ-5SELL JT (jointly owned)Traded 11-12 +31d$1K–$15K
2021-06-14Susie Lee D–NV-3SELL JT (jointly owned)Traded 05-18 +27d$1K–$15K
2021-04-21Josh Gottheimer D–NJ-5SELL partial · JT (partial sale, jointly owned)Traded 03-31 +21d$1K–$15K
2021-04-21Josh Gottheimer D–NJ-5SELL partial · JT (partial sale, jointly owned)Traded 03-17 +35d$1K–$15K

13F holders · Quarter ended 2026-03-31Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt. · longs only

All holders ↗
Top institutional holders of MKTX for quarter 2026-03-31, 1–25 of 422 holders
#FilerValueSecuritiesFlagsderived by Public Filings from this build's reviewed ticker-mapping holders list for this share class; that list carries each holder's share count, share change and filed date (the full holders view shows them), but no document links — the EDGAR link opens the filer's 13F list·§
1BlackRock, Inc.$672M1
derived ·§ EDGAR ↗
2PRIMECAP MANAGEMENT CO/CA/$552M1
derived ·§ EDGAR ↗
3AQR CAPITAL MANAGEMENT LLC$443M1
derived ·§ EDGAR ↗
4VANGUARD PORTFOLIO MANAGEMENT LLC$357M1
derived ·§ EDGAR ↗
5North Reef Capital Management LP$309M1
derived ·§ EDGAR ↗
6VANGUARD CAPITAL MANAGEMENT LLC$265M1
derived ·§ EDGAR ↗
7FMR LLC$251M1
derived ·§ EDGAR ↗
8STATE STREET CORP$211M1
derived ·§ EDGAR ↗
9MILLENNIUM MANAGEMENT LLC$179M1
derived ·§ EDGAR ↗
10BANK OF MONTREAL /CAN/$168M1
derived ·§ EDGAR ↗
11GUARDCAP ASSET MANAGEMENT Ltd$106M1
derived ·§ EDGAR ↗
12DIMENSIONAL FUND ADVISORS LP$95.9M1
derived ·§ EDGAR ↗
13TWO SIGMA INVESTMENTS, LP$86.5M1
derived ·§ EDGAR ↗
14MORGAN STANLEY$80.9M1
derived ·§ EDGAR ↗
15Findlay Park Partners LLP$79.3M1
derived ·§ EDGAR ↗
16CHARLES SCHWAB INVESTMENT MANAGEMENT INC$55.8M1
derived ·§ EDGAR ↗
17Walleye Capital LLC$54.9M1
derived ·§ EDGAR ↗
18ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$48.7M1
derived ·§ EDGAR ↗
19RDST Capital LLC$48.7M1
derived ·§ EDGAR ↗
20UBS Group AG$44.9M1
derived ·§ EDGAR ↗
21BANK OF AMERICA CORP /DE/$43.5M1
derived ·§ EDGAR ↗
22Amundi$42.7M1
derived ·§ EDGAR ↗
23Point72 Asset Management, L.P.$41.7M1
derived ·§ EDGAR ↗
24NORTHERN TRUST CORP$39.0M1
derived ·§ EDGAR ↗
25VANGUARD FIDUCIARY TRUST CO$37.9M1
derived ·§ EDGAR ↗
Show all 422 holders
Truncated by Public Filings. All 333 13F filers reporting this share class are listed. Method ↗

Crowding — not available in this build. No holder rows for the selected period, so no percentile can be ranked.

Congress ↔ notable managers · MKTX

Congress · last 90 days

Buyers
0 — —
Sellers
0 — —

filed 2026-07-31 → 2026-10-29 · statutory ranges

Notable managers · quarter ended 2026-03-31

Adding
1 Gotham Asset Management $9.9M held
Trimming
1 Bridgewater Associates $925K held

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · MARKETAXESS HLDGS INC

Merged timeline of congressional filings and notable-manager moves on MKTX
DateWhoChangeSize
2026-05-15Gotham Asset Management 13FADD+31,491 sh
2026-05-15Bridgewater Associates 13FTRIM−7,653 sh

2 newest, by filing date · 13F rows are quarter-end snapshots, not trades

Congress vs filers

12 months
Congress net (rows)0 buy / 1 sell
Congress net ($ bound)−$15.0K to −$1.0K
Filersnot computedThe filer side needs per-issuer quarter-over-quarter actions, which the published aggregate does not carry for this issuer. Convergence and divergence are stated only when both sides are computed.