Who owns AMX
Which tracked institutional funds hold AMX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AMX company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
96 tracked funds added or opened AMX while 34 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
AMX’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes AMX more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in AMX divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 332 tracked filers holding AMX, 165 increased or opened the position and 121 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in AMX between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 17
- Capital World Investors$353M
- Faithward Advisors, LLC$5M
- VANGUARD PORTFOLIO MANAGEMENT LLC$5M
- WEXFORD CAPITAL LP$3M
- Element Squared LLC$2M
- Vest Financial, LLC$1M
Full exits 13
- MARSHALL WACE, LLP$10M
- CITADEL ADVISORS LLC$7M
- Campbell & CO Investment Adviser LLC$6M
- Holocene Advisors, LP$4M
- VANGUARD GROUP INC$3M
- Y-Intercept (Hong Kong) Ltd$3M
Largest adds
- LAZARD ASSET MANAGEMENT LLC$165M
- FMR LLC$129M
- Boston Partners$83M
- Westwood Global Investments, LLC$54M
- BANK OF AMERICA CORP /DE/$47M
- TEACHER RETIREMENT SYSTEM OF TEXAS$34M
Largest trims
- Capital International Investors$574M
- NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO$63M
- M&T Bank Corp$11M
- Qube Research & Technologies Ltd$10M
- SCHRODER INVESTMENT MANAGEMENT GROUP$10M
- CAPITAL INTERNATIONAL SARL$5M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC added | 24,918,417 | $635M | 15.0% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC added | 20,807,915 | $530M | 12.5% | 2026-Q1 |
| Capital World Investors new | 13,872,513 | $353M | 8.4% | 2026-Q1 |
| Westwood Global Investments, LLC trimmed | 12,343,930 | $315M | 7.4% | 2026-Q1 |
| Capital International Investors trimmed | 10,218,787 | $260M | 6.2% | 2026-Q1 |
| Robeco Institutional Asset Management B.V. trimmed | 7,937,265 | $202M | 4.8% | 2026-Q1 |
| Boston Partners added | 7,188,334 | $183M | 4.3% | 2026-Q1 |
| DISCOVERY CAPITAL MANAGEMENT, LLC / CT added | 4,444,183 | $113M | 2.7% | 2026-Q1 |
| MORGAN STANLEY added | 4,372,988 | $111M | 2.6% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 4,305,379 | $110M | 2.6% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 3,444,629 | $88M | 2.1% | 2026-Q1 |
| BRANDES INVESTMENT PARTNERS, LP added | 3,015,888 | $77M | 1.8% | 2026-Q1 |
| TEACHER RETIREMENT SYSTEM OF TEXAS added | 2,670,300 | $68M | 1.6% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC trimmed | 2,468,928 | $63M | 1.5% | 2026-Q1 |
| Amundi added | 2,381,539 | $61M | 1.4% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 2,272,406 | $58M | 1.4% | 2026-Q1 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 2,210,252 | $56M | 1.3% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 2,099,260 | $53M | 1.3% | 2026-Q1 |
| Itau Unibanco Holding S.A. | 2,450,123 | $51M | 1.2% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 1,494,582 | $38M | 0.9% | 2026-Q1 |
| NAN FUNG TRINITY (HK) LTD trimmed | 1,322,800 | $34M | 0.8% | 2026-Q1 |
| GLENMEDE TRUST CO NA added | 1,315,299 | $34M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 1,273,920 | $32M | 0.8% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ added | 1,262,926 | $32M | 0.8% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 1,249,552 | $32M | 0.8% | 2026-Q1 |
| Rockefeller Capital Management L.P. added | 1,226,752 | $31M | 0.7% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 1,191,628 | $30M | 0.7% | 2026-Q1 |
| Capital Wealth Planning, LLC added | 1,044,181 | $27M | 0.6% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 1,018,777 | $26M | 0.6% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 1,016,873 | $26M | 0.6% | 2026-Q1 |
| Capital International, Inc./CA/ trimmed | 1,010,146 | $26M | 0.6% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 960,814 | $24M | 0.6% | 2026-Q1 |
| UBS Group AG added | 734,364 | $19M | 0.4% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 709,793 | $18M | 0.4% | 2026-Q1 |
| CAPITAL INTERNATIONAL SARL trimmed | 677,924 | $17M | 0.4% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 559,118 | $14M | 0.3% | 2026-Q1 |
| BlackRock, Inc. trimmed | 508,049 | $13M | 0.3% | 2026-Q1 |
| Invesco Ltd. trimmed | 455,153 | $12M | 0.3% | 2026-Q1 |
| ABC ARBITRAGE SA added | 416,914 | $11M | 0.3% | 2026-Q1 |
| Tidal Investments LLC added | 416,591 | $10M | 0.2% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 387,667 | $10M | 0.2% | 2026-Q1 |
| CITIGROUP INC trimmed | 373,692 | $10M | 0.2% | 2026-Q1 |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 335,171 | $9M | 0.2% | 2026-Q1 |
| State of New Jersey Common Pension Fund D added | 329,100 | $8M | 0.2% | 2026-Q1 |
| CAPITAL INTERNATIONAL LTD /CA/ trimmed | 307,481 | $8M | 0.2% | 2026-Q1 |
| GABELLI FUNDS LLC | 294,500 | $8M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 300,644 | $7M | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 282,716 | $7M | 0.2% | 2026-Q1 |
| LPL Financial LLC added | 241,027 | $6M | 0.1% | 2026-Q1 |
| SEI INVESTMENTS CO trimmed | 226,809 | $6M | 0.1% | 2026-Q1 |
| US BANCORP \DE\ trimmed | 216,160 | $6M | 0.1% | 2026-Q1 |
| Capital Group Private Client Services, Inc. trimmed | 210,204 | $5M | 0.1% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 203,205 | $5M | 0.1% | 2026-Q1 |
| MANNING & NAPIER ADVISORS LLC trimmed | 197,727 | $5M | 0.1% | 2026-Q1 |
| ASSETMARK, INC added | 195,693 | $5M | 0.1% | 2026-Q1 |
| Faithward Advisors, LLC new | 74,480 | $5M | 0.1% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 179,460 | $5M | 0.1% | 2026-Q1 |
| M&T Bank Corp added | 165,510 | $4M | 0.1% | 2026-Q1 |
| Creative Planning added | 158,155 | $4M | 0.1% | 2026-Q1 |
| Janney Montgomery Scott LLC added | 153,796 | $4M | 0.1% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 147,937 | $4M | 0.1% | 2026-Q1 |
| OPAL CAPITAL LLC added | 146,664 | $4M | 0.1% | 2026-Q1 |
| TrueMark Investments, LLC added | 146,664 | $4M | 0.1% | 2026-Q1 |
| Thrivent Financial for Lutherans added | 142,940 | $4M | 0.1% | 2026-Q1 |
| Henry James International Management Inc. trimmed | 142,565 | $4M | 0.1% | 2026-Q1 |
| Cetera Investment Advisers added | 140,574 | $4M | 0.1% | 2026-Q1 |
| HANTZ FINANCIAL SERVICES, INC. added | 134,737 | $3M | 0.1% | 2026-Q1 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC added | 133,905 | $3M | 0.1% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 126,809 | $3M | 0.1% | 2026-Q1 |
| AIA Group Ltd trimmed | 121,772 | $3M | 0.1% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 116,503 | $3M | 0.1% | 2026-Q1 |
| WEXFORD CAPITAL LP new | 114,412 | $3M | 0.1% | 2026-Q1 |
| Raiffeisen Bank International AG added | 117,620 | $3M | 0.1% | 2026-Q1 |
| Crossmark Global Holdings, Inc. trimmed | 111,036 | $3M | 0.1% | 2026-Q1 |
| STIFEL FINANCIAL CORP added | 107,015 | $3M | 0.1% | 2026-Q1 |
| COMMONWEALTH EQUITY SERVICES, LLC added | 104,902 | $3M | 0.1% | 2026-Q1 |
| American Trust Investment Advisors, LLC trimmed | 104,540 | $3M | 0.1% | 2026-Q1 |
| XTX Topco Ltd trimmed | 101,265 | $3M | 0.1% | 2026-Q1 |
| Brooklyn Investment Group added | 94,682 | $2M | 0.1% | 2026-Q1 |
| Element Squared LLC new | 93,198 | $2M | 0.1% | 2026-Q1 |
| Asset Management One Co., Ltd. trimmed | 87,252 | $2M | 0.1% | 2026-Q1 |
| Advisors Asset Management, Inc. added | 86,181 | $2M | 0.1% | 2026-Q1 |
| HighTower Advisors, LLC added | 81,632 | $2M | 0.0% | 2026-Q1 |
| CAPITAL GROUP INVESTMENT MANAGEMENT PTE. LTD. trimmed | 77,927 | $2M | 0.0% | 2026-Q1 |
| MACQUARIE GROUP LTD added | 2,146,781 | $45M | 1.1% | 2025-Q3 stale |
| Glenmede Investment Management, LP added | 1,318,446 | $28M | 0.7% | 2025-Q3 stale |
| CANADA PENSION PLAN INVESTMENT BOARD new | 627,200 | $11M | 0.3% | 2025-Q2 stale |
| MARSHALL WACE, LLP added | 471,645 | $10M | 0.2% | 2025-Q4 stale |
| CITADEL ADVISORS LLC added | 325,214 | $7M | 0.2% | 2025-Q4 stale |
| Campbell & CO Investment Adviser LLC added | 303,053 | $6M | 0.1% | 2025-Q4 stale |
| Holocene Advisors, LP new | 205,874 | $4M | 0.1% | 2025-Q4 stale |
| TSP Capital Management Group, LLC trimmed | 193,321 | $4M | 0.1% | 2025-Q3 stale |
| IFC Advisors LLC new | 230,898 | $3M | 0.1% | 2025-Q1 stale |
| VANGUARD GROUP INC trimmed | 141,722 | $3M | 0.1% | 2025-Q4 stale |
| MIRABELLA FINANCIAL SERVICES LLP added | 136,689 | $3M | 0.1% | 2025-Q3 stale |
| Y-Intercept (Hong Kong) Ltd added | 122,436 | $3M | 0.1% | 2025-Q4 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 112,745 | $2M | 0.1% | 2025-Q3 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 162,145 | $2M | 0.1% | 2025-Q1 stale |
| GAM Holding AG added | 106,249 | $2M | 0.1% | 2025-Q4 stale |
| Jain Global LLC added | 98,999 | $2M | 0.0% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.