Who owns AGO (AGO)
Which tracked institutional funds hold AGO, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See AGO 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
48 tracked funds added or opened AGO while 89 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
AGO’s largest tracked holder by dollar value, VANGUARD GROUP INC, 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 AGO more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in AGO 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 367 tracked filers holding AGO, 196 increased or opened the position and 177 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 AGO 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 19
- VANGUARD PORTFOLIO MANAGEMENT LLC$320M
- VANGUARD CAPITAL MANAGEMENT LLC$160M
- VANGUARD FIDUCIARY TRUST CO$22M
- GENDELL JEFFREY L$20M
- CAPITOLIS LIQUID GLOBAL MARKETS LLC$7M
- TEACHER RETIREMENT SYSTEM OF TEXAS$6M
Full exits 15
- VANGUARD GROUP INC$545M
- Pine Valley Investments Ltd Liability Co$27M
- MILLENNIUM MANAGEMENT LLC$13M
- Brandywine Global Investment Management, LLC$11M
- Capitolis Liquid Global Markets LLC$10M
- TWO SIGMA ADVISERS, LP$9M
Largest adds
- AQR CAPITAL MANAGEMENT LLC$22M
- TWO SIGMA INVESTMENTS, LP$14M
- Man Group plc$8M
- GOLDMAN SACHS GROUP INC$8M
- Quantinno Capital Management LP$7M
- FRANKLIN RESOURCES INC$7M
Largest trims
- BlackRock, Inc.$195M
- DIMENSIONAL FUND ADVISORS LP$38M
- WELLINGTON MANAGEMENT GROUP LLP$27M
- Boston Partners$21M
- FIRST TRUST ADVISORS LP$21M
- AMERIPRISE FINANCIAL INC$18M
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 |
|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 3,925,791 | $320M | 8.6% | 2026-Q1 |
| BlackRock, Inc. trimmed | 3,741,949 | $305M | 8.2% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 3,011,751 | $245M | 6.6% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,965,693 | $160M | 4.3% | 2026-Q1 |
| River Road Asset Management, LLC added | 1,891,378 | $154M | 4.2% | 2026-Q1 |
| STATE STREET CORP trimmed | 1,572,236 | $128M | 3.5% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 1,356,635 | $111M | 3.0% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 1,316,129 | $107M | 2.9% | 2026-Q1 |
| REINHART PARTNERS, LLC. added | 1,287,173 | $105M | 2.8% | 2026-Q1 |
| ROYCE & ASSOCIATES LP trimmed | 982,147 | $80M | 2.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 857,396 | $70M | 1.9% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. trimmed | 849,653 | $69M | 1.9% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 780,573 | $64M | 1.7% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 734,344 | $60M | 1.6% | 2026-Q1 |
| NORGES BANK trimmed | 571,582 | $50M | 1.4% | 2026-Q1 |
| Boston Partners trimmed | 575,890 | $47M | 1.3% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 571,350 | $47M | 1.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 570,014 | $46M | 1.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 523,381 | $43M | 1.2% | 2026-Q1 |
| Quantinno Capital Management LP added | 499,347 | $41M | 1.1% | 2026-Q1 |
| NORTHERN TRUST CORP added | 448,294 | $37M | 1.0% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 416,019 | $34M | 0.9% | 2026-Q1 |
| BROWN ADVISORY INC trimmed | 404,935 | $33M | 0.9% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 384,457 | $31M | 0.8% | 2026-Q1 |
| Long Focus Capital Management, LLC | 380,000 | $31M | 0.8% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 364,454 | $30M | 0.8% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 359,800 | $29M | 0.8% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 351,521 | $29M | 0.8% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 332,380 | $27M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 298,203 | $24M | 0.7% | 2026-Q1 |
| Gotham Asset Management, LLC added | 272,383 | $22M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 269,593 | $22M | 0.6% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 254,471 | $21M | 0.6% | 2026-Q1 |
| GENDELL JEFFREY L added | 245,422 | $20M | 0.5% | 2026-Q1 |
| BARCLAYS PLC added | 242,239 | $20M | 0.5% | 2026-Q1 |
| Man Group plc added | 203,916 | $17M | 0.4% | 2026-Q1 |
| Public Sector Pension Investment Board added | 188,155 | $15M | 0.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 171,385 | $14M | 0.4% | 2026-Q1 |
| LRI Investments, LLC trimmed | 170,065 | $14M | 0.4% | 2026-Q1 |
| UBS Group AG trimmed | 159,480 | $13M | 0.4% | 2026-Q1 |
| Invesco Ltd. trimmed | 158,349 | $13M | 0.3% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 145,519 | $12M | 0.3% | 2026-Q1 |
| SG Americas Securities, LLC added | 135,233 | $11M | 0.3% | 2026-Q1 |
| Allianz Asset Management GmbH added | 132,287 | $11M | 0.3% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 131,959 | $11M | 0.3% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 130,902 | $11M | 0.3% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 130,456 | $11M | 0.3% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 127,366 | $10M | 0.3% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 127,000 | $10M | 0.3% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 125,592 | $10M | 0.3% | 2026-Q1 |
| Clearbridge Investments, LLC trimmed | 122,572 | $10M | 0.3% | 2026-Q1 |
| Cambria Investment Management, L.P. added | 110,657 | $9M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 109,651 | $9M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 106,498 | $9M | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 101,519 | $8M | 0.2% | 2026-Q1 |
| Robeco Institutional Asset Management B.V. trimmed | 95,099 | $8M | 0.2% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 94,410 | $8M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 95,210 | $8M | 0.2% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 88,939 | $7M | 0.2% | 2026-Q1 |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC new | 86,900 | $7M | 0.2% | 2026-Q1 |
| Swiss National Bank trimmed | 86,600 | $7M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 83,069 | $7M | 0.2% | 2026-Q1 |
| Vest Financial, LLC added | 80,588 | $7M | 0.2% | 2026-Q1 |
| TEACHER RETIREMENT SYSTEM OF TEXAS added | 79,473 | $6M | 0.2% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 79,069 | $6M | 0.2% | 2026-Q1 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 79,045 | $6M | 0.2% | 2026-Q1 |
| FMR LLC trimmed | 74,226 | $6M | 0.2% | 2026-Q1 |
| Corient Private Wealth LLC trimmed | 74,358 | $6M | 0.2% | 2026-Q1 |
| Bridgewater Associates, LP trimmed | 71,447 | $6M | 0.2% | 2026-Q1 |
| Trexquant Investment LP trimmed | 61,743 | $5M | 0.1% | 2026-Q1 |
| EULAV Asset Management | 60,000 | $5M | 0.1% | 2026-Q1 |
| BANK OF NOVA SCOTIA added | 59,909 | $5M | 0.1% | 2026-Q1 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 58,258 | $5M | 0.1% | 2026-Q1 |
| Amundi added | 56,510 | $5M | 0.1% | 2026-Q1 |
| Cerity Partners LLC trimmed | 54,529 | $4M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 49,101 | $4M | 0.1% | 2026-Q1 |
| STIFEL FINANCIAL CORP added | 53,025 | $4M | 0.1% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 49,603 | $4M | 0.1% | 2026-Q1 |
| Magnetar Financial LLC added | 48,431 | $4M | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 47,342 | $4M | 0.1% | 2026-Q1 |
| CAPITAL FUND MANAGEMENT S.A. trimmed | 42,753 | $3M | 0.1% | 2026-Q1 |
| SEI INVESTMENTS CO added | 40,487 | $3M | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 40,366 | $3M | 0.1% | 2026-Q1 |
| De Lisle Partners LLP trimmed | 39,721 | $3M | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 39,343 | $3M | 0.1% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 39,119 | $3M | 0.1% | 2026-Q1 |
| Hillsdale Investment Management Inc. new | 37,800 | $3M | 0.1% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 36,898 | $3M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 6,069,483 | $545M | 14.7% | 2025-Q4 stale |
| Pine Valley Investments Ltd Liability Co added | 302,957 | $27M | 0.7% | 2025-Q4 stale |
| MILLENNIUM MANAGEMENT LLC added | 142,761 | $13M | 0.3% | 2025-Q4 stale |
| Brandywine Global Investment Management, LLC trimmed | 121,963 | $11M | 0.3% | 2025-Q4 stale |
| Capitolis Liquid Global Markets LLC trimmed | 111,100 | $10M | 0.3% | 2025-Q4 stale |
| Philadelphia Financial Management of San Francisco, LLC trimmed | 112,306 | $10M | 0.3% | 2025-Q2 stale |
| TWO SIGMA ADVISERS, LP added | 97,100 | $9M | 0.2% | 2025-Q4 stale |
| SCHRODER INVESTMENT MANAGEMENT GROUP trimmed | 65,085 | $6M | 0.2% | 2025-Q2 stale |
| Edgestream Partners, L.P. added | 49,077 | $4M | 0.1% | 2025-Q2 stale |
| Lombard Odier Asset Management (USA) Corp added | 47,480 | $4M | 0.1% | 2025-Q3 stale |
| Point72 Asset Management, L.P. added | 39,997 | $4M | 0.1% | 2025-Q4 stale |
| ZACKS INVESTMENT MANAGEMENT added | 40,804 | $4M | 0.1% | 2025-Q2 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.