Who owns Assured Guaranty (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-Q2 13F filings (latest filed 2026-09-22). 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
60 tracked funds added or opened AGO while 91 trimmed or exited it between 2026-Q1 and 2026-Q2 — 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, BlackRock, 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 2026-Q1 and 2026-Q2, across 342 tracked filers holding AGO, 156 increased or opened the position and 226 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 2026-Q1 and 2026-Q2 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 16
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$8M
- MILLENNIUM MANAGEMENT LLC$7M
- Point72 Asset Management, L.P.$5M
- MONECO ADVISORS, LLC$2M
- TT Capital Management LLC$2M
- CenterBook Partners LP$1M
Full exits 27
- SG Americas Securities, LLC$11M
- Amundi$5M
- HARBOR CAPITAL ADVISORS, INC.$3M
- State of Alaska, Department of Revenue$2M
- Oak Thistle LLC$2M
- JANUS HENDERSON GROUP PLC$2M
Largest adds
- BlackRock, Inc.$159M
- AQR CAPITAL MANAGEMENT LLC$42M
- GENDELL JEFFREY L$38M
- FIRST TRUST ADVISORS LP$11M
- MACKENZIE FINANCIAL CORP$10M
- Squarepoint Ops LLC$5M
Largest trims
- River Road Asset Management, LLC$61M
- TWO SIGMA INVESTMENTS, LP$24M
- FRANKLIN RESOURCES INC$18M
- RAYMOND JAMES FINANCIAL INC$16M
- UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$11M
- Quantinno Capital Management LP$9M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 5,787,502 | $464M | 14.6% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 3,965,491 | $318M | 10.0% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 3,027,991 | $243M | 7.7% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 1,916,655 | $154M | 4.8% | 2026-Q2 |
| STATE STREET CORP added | 1,586,416 | $127M | 4.0% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 1,518,088 | $122M | 3.8% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 1,403,093 | $112M | 3.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 1,395,148 | $112M | 3.5% | 2026-Q2 |
| REINHART PARTNERS, LLC. trimmed | 1,246,181 | $100M | 3.1% | 2026-Q2 |
| River Road Asset Management, LLC trimmed | 1,160,270 | $93M | 2.9% | 2026-Q2 |
| ROYCE & ASSOCIATES LP added | 1,060,397 | $85M | 2.7% | 2026-Q2 |
| FULLER & THALER ASSET MANAGEMENT, INC. trimmed | 820,652 | $66M | 2.1% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 754,859 | $61M | 1.9% | 2026-Q2 |
| GENDELL JEFFREY L added | 726,136 | $58M | 1.8% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 716,703 | $57M | 1.8% | 2026-Q2 |
| MORGAN STANLEY added | 594,406 | $48M | 1.5% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 573,964 | $46M | 1.5% | 2026-Q2 |
| NORGES BANK trimmed | 537,845 | $43M | 1.4% | 2026-Q2 |
| Boston Partners trimmed | 486,458 | $39M | 1.2% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 444,566 | $36M | 1.1% | 2026-Q2 |
| BROWN ADVISORY INC added | 415,675 | $33M | 1.1% | 2026-Q2 |
| Quantinno Capital Management LP trimmed | 400,665 | $32M | 1.0% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 386,385 | $31M | 1.0% | 2026-Q2 |
| Long Focus Capital Management, LLC | 380,000 | $30M | 1.0% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 375,596 | $30M | 0.9% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 300,592 | $24M | 0.8% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 287,238 | $23M | 0.7% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 283,634 | $23M | 0.7% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 273,216 | $22M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 264,553 | $21M | 0.7% | 2026-Q2 |
| Pine Valley Investments Ltd Liability Co trimmed | 253,136 | $20M | 0.6% | 2026-Q2 |
| Gotham Asset Management, LLC trimmed | 249,502 | $20M | 0.6% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 233,321 | $19M | 0.6% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 216,103 | $17M | 0.5% | 2026-Q2 |
| BARCLAYS PLC trimmed | 200,526 | $16M | 0.5% | 2026-Q2 |
| UBS Group AG added | 190,307 | $15M | 0.5% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 180,107 | $14M | 0.5% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 179,588 | $14M | 0.5% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 168,908 | $14M | 0.4% | 2026-Q2 |
| Man Group plc trimmed | 167,649 | $13M | 0.4% | 2026-Q2 |
| Allianz Asset Management GmbH added | 166,975 | $14M | 0.4% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 165,281 | $13M | 0.4% | 2026-Q2 |
| Invesco Ltd. added | 163,380 | $13M | 0.4% | 2026-Q2 |
| LRI Investments, LLC trimmed | 147,309 | $12M | 0.4% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 146,450 | $12M | 0.4% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 140,039 | $11M | 0.4% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 137,905 | $11M | 0.3% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 135,455 | $11M | 0.3% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 125,936 | $10M | 0.3% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 125,315 | $10M | 0.3% | 2026-Q2 |
| Clearbridge Investments, LLC trimmed | 122,428 | $10M | 0.3% | 2026-Q2 |
| Cambria Investment Management, L.P. added | 118,624 | $10M | 0.3% | 2026-Q2 |
| Legal & General Group Plc trimmed | 97,778 | $8M | 0.2% | 2026-Q2 |
| FMR LLC added | 96,567 | $8M | 0.2% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 94,726 | $8M | 0.2% | 2026-Q2 |
| NATIXIS added | 94,160 | $8M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System trimmed | 93,733 | $8M | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN trimmed | 93,003 | $7M | 0.2% | 2026-Q2 |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC | 86,900 | $7M | 0.2% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. trimmed | 86,751 | $7M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 85,585 | $7M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 85,500 | $7M | 0.2% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 83,626 | $7M | 0.2% | 2026-Q2 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC added | 83,025 | $7M | 0.2% | 2026-Q2 |
| CAPITAL FUND MANAGEMENT S.A. added | 81,360 | $7M | 0.2% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 79,181 | $6M | 0.2% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 78,581 | $6M | 0.2% | 2026-Q2 |
| Trexquant Investment LP added | 78,044 | $6M | 0.2% | 2026-Q2 |
| TEACHER RETIREMENT SYSTEM OF TEXAS trimmed | 77,692 | $6M | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC added | 75,842 | $6M | 0.2% | 2026-Q2 |
| Bridgewater Associates, LP trimmed | 66,359 | $5M | 0.2% | 2026-Q2 |
| Nuveen, LLC trimmed | 65,388 | $5M | 0.2% | 2026-Q2 |
| Vest Financial, LLC trimmed | 62,733 | $5M | 0.2% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 57,998 | $5M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 56,251 | $5M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 55,514 | $5M | 0.1% | 2026-Q2 |
| STIFEL FINANCIAL CORP trimmed | 51,748 | $4M | 0.1% | 2026-Q2 |
| Cerity Partners LLC trimmed | 49,778 | $4M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 48,188 | $4M | 0.1% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 45,306 | $4M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 44,870 | $4M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 41,629 | $3M | 0.1% | 2026-Q2 |
| De Lisle Partners LLP | 39,721 | $3M | 0.1% | 2026-Q2 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC added | 38,335 | $3M | 0.1% | 2026-Q2 |
| Engineers Gate Manager LP added | 36,943 | $3M | 0.1% | 2026-Q2 |
| VIRGINIA RETIREMENT SYSTEMS ET Al | 35,150 | $3M | 0.1% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 35,139 | $3M | 0.1% | 2026-Q2 |
| VELA Investment Management, LLC | 34,892 | $3M | 0.1% | 2026-Q2 |
| EULAV Asset Management trimmed | 32,000 | $3M | 0.1% | 2026-Q2 |
| BANK OF NOVA SCOTIA trimmed | 27,755 | $2M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 27,703 | $2M | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 27,330 | $2M | 0.1% | 2026-Q2 |
| Creative Planning added | 26,698 | $2M | 0.1% | 2026-Q2 |
| Diametric Capital, LP added | 26,424 | $2M | 0.1% | 2026-Q2 |
| MONECO ADVISORS, LLC new | 26,399 | $2M | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 25,921 | $2M | 0.1% | 2026-Q2 |
| HANCOCK WHITNEY CORP | 25,197 | $2M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 25,150 | $2M | 0.1% | 2026-Q2 |
| KLP KAPITALFORVALTNING AS added | 25,000 | $2M | 0.1% | 2026-Q2 |
| Vinva Investment Management Ltd added | 23,231 | $3M | 0.1% | 2026-Q2 |
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.