AGO · Assured Guaranty Ltd · Shareholders & Ownership

$70.31 +1.04 (+1.50%)

S&P 600 member Russell 1000 member Rebalance outlook locked

Market Cap

$3.07B

43.98M

Volume · Oct 22 491.17K Avg daily vol (3M) 425.02K

Every disclosed holder of AGO in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns AGO

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	367	41,190,179	93.66%	Yes
Insiders (Forms 3, 4, 5)	18	2,727,006	6.20%	Yes
13D/G-only blocks	0	0	0.00%	Yes
Remaining	—	62,023	0.14%	Rest
Registered funds (N-PORT, not summed)	125	9,115,088	20.73%	No

Shares outstanding: 43,979,208, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of AGO

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	5,787,502	13.16%	+7,039	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	iShares Russell 1000 Value ETF Fund S000004345 · Registered fund · Jun 30, 2026 iShares Trust, not summed	93,485	0.21%	-8,208	Jun 30, 2026	iShares Trust, not summed
1.2	iShares U.S. Financials ETF Fund S000004323 · Registered fund · Jul 31, 2026 iShares Trust, not summed	29,507	0.07%	+5,806	Jul 31, 2026	iShares Trust, not summed
1.3	iShares Russell 1000 ETF Fund S000004347 · Registered fund · Jun 30, 2026 iShares Trust, not summed	29,067	0.07%	-3,988	Jun 30, 2026	iShares Trust, not summed
1.4	iShares U.S. Insurance ETF Fund S000009421 · Registered fund · Jun 30, 2026 iShares Trust, not summed	20,092	0.05%	+809	Jun 30, 2026	iShares Trust, not summed
1.5	iShares MSCI World Small-Cap ETF Fund S000091430 · Registered fund · May 31, 2026 iShares Trust, not summed	2,753	0.01%	—	May 31, 2026	iShares Trust, not summed
2	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,965,491	9.02%	+39,700	Jun 30, 2026	carried, not yet filed for the newest quarter
3	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,027,991	6.89%	+16,240	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	Dimensional US Small Cap Value ETF Fund S000075151 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	257,106	0.58%	+19,405	Jul 31, 2026	Dimensional ETF Trust, not summed
3.2	Dimensional U.S. Targeted Value ETF Fund S000070901 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	213,166	0.48%	+7,430	Jul 31, 2026	Dimensional ETF Trust, not summed
3.3	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	195,463	0.44%	-589	Jul 31, 2026	Dimensional ETF Trust, not summed
3.4	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	94,764	0.22%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
3.5	Dimensional U.S. Marketwide Value ETF Fund S000075030 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	38,476	0.09%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
4	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,916,655	4.36%	-49,038	Jun 30, 2026	carried, not yet filed for the newest quarter
5	FREDERICO DOMINIC Insider CIK 1072524 · Aug 20, 2026 Director, President/CEO/Deputy Chairman, issuer-wide	1,629,819	3.71%	-23,056	Aug 20, 2026	Director, President/CEO/Deputy Chairman, issuer-wide
6	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,586,416	3.61%	+14,180	Jun 30, 2026	carried, not yet filed for the newest quarter
7	FIRST TRUST ADVISORS LP 13F CIK 1125816 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,518,088	3.45%	+161,453	Jun 30, 2026	carried, not yet filed for the newest quarter
8	AMERICAN CENTURY COMPANIES INC 13F CIK 748054 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,403,093	3.19%	+86,964	Jun 30, 2026	carried, not yet filed for the newest quarter
9	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,395,148	3.17%	+534,708	Jun 30, 2026	carried, not yet filed for the newest quarter
10	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,337,745	3.04%	-41,213	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
11	VANGUARD EQUITY INCOME FUND Fund S000002579 · Registered fund · Jun 30, 2026 VANGUARD FENWAY FUNDS, not summed	1,217,164	2.77%	+108,881	Jun 30, 2026	VANGUARD FENWAY FUNDS, not summed
12	Avantis U.S. Small Cap Value ETF Fund S000066459 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	1,200,385	2.73%	+71,106	May 31, 2026	American Century ETF Trust, not summed
13	REINHART PARTNERS, LLC. 13F CIK 1080298 · Registered investment adviser · Sep 30, 2026	1,188,700	2.70%	-57,481	Sep 30, 2026
14	River Road Asset Management, LLC 13F CIK 1341401 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,160,270	2.64%	-731,108	Jun 30, 2026	carried, not yet filed for the newest quarter
15	ROYCE & ASSOCIATES LP 13F CIK 906304 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,060,397	2.41%	+78,250	Jun 30, 2026	carried, not yet filed for the newest quarter
16	VANGUARD SMALL-CAP INDEX FUND Fund S000002845 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	965,877	2.20%	-44,186	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
17	FULLER & THALER ASSET MANAGEMENT, INC. 13F CIK 1082327 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	820,652	1.87%	-29,001	Jun 30, 2026	carried, not yet filed for the newest quarter
18	PRINCIPAL FINANCIAL GROUP INC 13F CIK 1126328 · Insurance company · Jun 30, 2026 carried, not yet filed for the newest quarter	754,859	1.72%	-25,714	Jun 30, 2026	carried, not yet filed for the newest quarter
18.1	Small-MidCap Dividend Income Fund Fund S000032942 · Registered fund · May 31, 2026 Principal Funds, Inc, not summed	235,509	0.54%	-26,601	May 31, 2026	Principal Funds, Inc, not summed
18.2	SmallCap S&P 600 Index Fund Fund S000007203 · Registered fund · Jul 31, 2026 Principal Funds, Inc, not summed	30,652	0.07%	-3,400	Jul 31, 2026	Principal Funds, Inc, not summed
18.3	SmallCap Value Fund II Fund S000007169 · Registered fund · Jul 31, 2026 Principal Funds, Inc, not summed	12,700	0.03%	0	Jul 31, 2026	Principal Funds, Inc, not summed
18.4	MidCap Value Fund I Fund S000007173 · Registered fund · Jul 31, 2026 Principal Funds, Inc, not summed	941	0.00%	+333	Jul 31, 2026	Principal Funds, Inc, not summed
19	GENDELL JEFFREY L 13F CIK 1056581 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	726,136	1.65%	+480,714	Jun 30, 2026	carried, not yet filed for the newest quarter
20	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	716,703	1.63%	-17,641	Jun 30, 2026	carried, not yet filed for the newest quarter
21	VANGUARD SMALL-CAP VALUE INDEX FUND Fund S000002847 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	611,158	1.39%	-32,011	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
22	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	594,406	1.35%	+24,392	Jun 30, 2026	carried, not yet filed for the newest quarter
23	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	573,964	1.31%	+2,614	Jun 30, 2026	carried, not yet filed for the newest quarter
24	NORGES BANK 13F CIK 1374170 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	537,845	1.22%	—	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Boston Partners 13F CIK 1386060 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	486,458	1.11%	-89,432	Jun 30, 2026	carried, not yet filed for the newest quarter
26	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	476,876	1.08%	-6,558	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
27	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	444,566	1.01%	-3,728	Jun 30, 2026	carried, not yet filed for the newest quarter
27.1	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	4,219	0.01%	—	Jun 30, 2026	Northern Funds, not summed
27.2	Large Cap Value Fund Fund S000001271 · Registered fund · Jun 30, 2026 Northern Funds, not summed	3,285	0.01%	-56	Jun 30, 2026	Northern Funds, not summed
27.3	Large Cap Core Fund Fund S000001243 · Registered fund · Jun 30, 2026 Northern Funds, not summed	98	0.00%	-13,346	Jun 30, 2026	Northern Funds, not summed
28	BROWN ADVISORY INC 13F CIK 1345929 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	415,675	0.95%	+10,740	Jun 30, 2026	carried, not yet filed for the newest quarter
29	Quantinno Capital Management LP 13F CIK 1759654 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	400,665	0.91%	-98,682	Jun 30, 2026	carried, not yet filed for the newest quarter
30	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	386,385	0.88%	+21,931	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Long Focus Capital Management, LLC 13F CIK 1602716 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	380,000	0.86%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
32	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	375,596	0.85%	+15,796	Jun 30, 2026	carried, not yet filed for the newest quarter
33	VANGUARD TAX-MANAGED SMALL-CAP FUND Fund S000004387 · Registered fund · Jun 30, 2026 VANGUARD TAX-MANAGED FUNDS, not summed	329,115	0.75%	0	Jun 30, 2026	VANGUARD TAX-MANAGED FUNDS, not summed
34	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 13F CIK 1164508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	300,592	0.68%	+46,121	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	287,238	0.65%	-10,965	Jun 30, 2026	carried, not yet filed for the newest quarter
36	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	283,634	0.64%	-84,041	Jun 30, 2026	carried, not yet filed for the newest quarter
37	Qube Research & Technologies Ltd 13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	273,216	0.62%	-59,164	Jun 30, 2026	carried, not yet filed for the newest quarter
38	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	264,553	0.60%	-5,040	Jun 30, 2026	carried, not yet filed for the newest quarter
39	Bailenson Robert Insider CIK 1326822 · May 11, 2026 Chief Operating Officer, issuer-wide	256,251	0.58%	-50,000	May 11, 2026	Chief Operating Officer, issuer-wide
40	Pine Valley Investments Ltd Liability Co 13F CIK 1975417 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	253,136	0.58%	-300	Jun 30, 2026	carried, not yet filed for the newest quarter
41	Gotham Asset Management, LLC 13F CIK 1510387 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	249,502	0.57%	-22,881	Jun 30, 2026	carried, not yet filed for the newest quarter
42	VANGUARD DIVIDEND APPRECIATION INDEX FUND Fund S000011322 · Registered fund · Jul 31, 2026 VANGUARD SPECIALIZED FUNDS, not summed	235,439	0.54%	-7,959	Jul 31, 2026	VANGUARD SPECIALIZED FUNDS, not summed
43	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	233,321	0.53%	-290,060	Jun 30, 2026	carried, not yet filed for the newest quarter
44	RAYMOND JAMES FINANCIAL INC 13F CIK 720005 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	216,103	0.49%	-199,916	Jun 30, 2026	carried, not yet filed for the newest quarter
45	BARCLAYS PLC 13F CIK 312069 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	200,526	0.46%	-41,713	Jun 30, 2026	carried, not yet filed for the newest quarter
46	Chow Ling Insider CIK 1724439 · May 1, 2026 General Counsel and Secretary, issuer-wide	195,570	0.44%	+5,970	May 1, 2026	General Counsel and Secretary, issuer-wide
47	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	190,307	0.43%	+30,827	Jun 30, 2026	carried, not yet filed for the newest quarter
48	HRT FINANCIAL LP 13F CIK 1475597 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	180,291	0.41%	+169,286	Jun 30, 2026	carried, not yet filed for the newest quarter
49	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	180,107	0.41%	+48,148	Jun 30, 2026	carried, not yet filed for the newest quarter
50	Public Sector Pension Investment Board 13F CIK 1396318 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	179,588	0.41%	-8,567	Jun 30, 2026	carried, not yet filed for the newest quarter

5 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 460 holders

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Key facts CIK 1273813 CUSIP G0585R106 13F (30d) 40 filings 40 filers Visit website Investor relations