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AGG · iShares Core U.S. Aggregate Bond ETF · Holdings ETF

Alerts for AGG
$95.27 +0.16 (+0.17%)
Volume · Oct 20 9.96M Avg daily vol (3M) 10.06M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
Holders: 443
Total Value: $3,398,713
Total Shares: 69,328,435
Showing 1–100 of 444 holdings by value · page 1 of 5

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 443 13F filers · Δ vs Jun 30, 2026
Top Holder
100.0%
Dec 2023 → Sep 2026 · range 31.9% – 100.0%
+68.1 pts
Top 5
100.0%
Dec 2023 → Sep 2026 · range 53.3% – 100.0%
+46.7 pts
Top 10
100.0%
Dec 2023 → Sep 2026 · range 64.6% – 100.0%
+35.4 pts
HHI
10,000
Dec 2023 → Sep 2026 · range 1,186 – 10,000
Highly concentrated+8,814

Who Holds AGG

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 2,100 filers, like-for-like change +0.8%; actively managed books -0.3%; index-like books +11.4%.

Holder type Share Filers Change
Registered adviser 32.0% 1,403 +0.6%
Exempt adviser 0.0% 3 +688.4%
Adviser 1.6% 16 -0.5%
Bank 22.0% 54 +0.6%
Insurer 0.1% 4 -49.0%
Broker-dealer 1.2% 1 +10.2%
Benefit plan 1.3% 5 +8.2%
Non-US 0.3% 5 +1.4%
Holding company 10.0% 10 +9.6%
Unknown 31.5% 599 -1.6%

The Sep 30, 2026 filing window is still open, so its bar shows only the filers that have filed so far.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 27 holders with no observed 2026-03-31 13F and 34 holders with no observed 2026-06-30 13F. Compared across CIK changes: 4 filers continue as Evelyn Partners Group Ltd; JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.

Conviction and Crowding

2,100 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
704
33.5% of filers hold it in their top 10
Mar 31, 2026: 5
Holders above 5%
106
median weight 0.583%
Mar 31, 2026: 0
Crowding
—
shares outstanding is an issuer-wide count, not one listing's
Private-fund advisers
—
of shares outstanding
Institutional ownership
—
shares outstanding is an issuer-wide count, not one listing's
Top 10 holders
47.0%
of 13F shares, Herfindahl 0.029
Active holders
-0.3%
like-for-like share change of active filers
5% stakes on record
0
0 13D, 0 13G
How long holders have held it value-weighted 19.8 quarters
Under 1 year 4.40% 1 to 3 years 19.4% 3 years or more 76.2% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Fund Ownership of AGG by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 2,043,610 shares.

Fund type Shares
Index funds 0
Index ETFs 2,043,610
Active ETFs 8,602,825
Active funds 947,770
Unclassified 2,268,321
All registered funds 13,862,526
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Quarterly Activity

vs Jun 30, 2026
New
30
Increased
192
Decreased
172
Sold Out
33
Unchanged
46

New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.

Holder count: -1,667
Institutional value: -100.0%
Shares held: -94.4%

Top Buyers

vs Jun 30, 2026
Institution Added Now Holds Open

Top Sellers

vs Jun 30, 2026
Institution Sold Now Holds Open

Top New Positions

vs Jun 30, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Jun 30, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 444
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Holder Value (USD) % of 13F Shares Open

Showing the top 100 of 444 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.