iShares Trust - iShares MBS ETF
US ˙ NasdaqGM ˙ US4642885887

SecurityMBB / iShares Trust - iShares MBS ETF
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership512,270 shares
Latest Disclosed Value $ 48,694,233
Advisor Group Holdings, Inc. reports 3.09% increase in ownership of MBB / iShares Trust - iShares MBS ETF

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 512,270 shares of iShares Trust - iShares MBS ETF (US:MBB) valued at $48,640,036 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 496,927 shares of iShares Trust - iShares MBS ETF. This represents a change in shares of 3.09% during the quarter. The current value of the position is $48,020,190 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ISHARES TR MBS ETF 464288588 512,270 15,343 3.09 48,694 2.79 0.0415
2026-02-17 2025-12-31 13F ISHARES TR MBS ETF 464288588 496,927 -28,901 -5.50 47,373 -5.23 0.0692
2025-11-14 2025-09-30 13F ISHARES TR MBS ETF 464288588 525,828 -43 -0.01 49,985 1.19 0.0700
2025-09-04 2025-06-30 13F/A-1 SHARES TR MBS ETF 464288588 525,871 163,779 45.23 49,399 45.32 0.0879
2025-08-13 2025-06-30 13F SHARES TR MBS ETF 464288588 548,785 186,693 50,992 0.0590
2025-05-12 2025-03-31 13F ISHARES TR MBS ETF 464288588 362,092 -107,740 -22.93 33,993 -21.15 0.0757
2025-06-06 2024-12-31 13F/A-1 ISHARES TR MBS ETF 464288588 469,832 -152,853 -24.55 43,111 -27.78 0.0968
2025-02-07 2024-12-31 13F ISHARES TR MBS ETF 464288588 457,466 -165,219 42,958 0.1096
2024-11-13 2024-09-30 13F ISHARES TR MBS ETF 464288588 622,685 270,188 76.65 59,692 84.29 0.1346
2024-08-13 2024-06-30 13F ISHARES TR MBS ETF 464288588 352,497 33,926 10.65 32,391 9.93 0.0765
2024-05-10 2024-03-31 13F ISHARES TR MBS ETF 464288588 318,571 -1,672,930 -84.00 29,466 -84.28 0.0658
2024-02-12 2023-12-31 13F ISHARES TR MBS ETF 464288588 1,991,501 -991,447 -33.24 187,491 -29.25 0.3281
2023-11-13 2023-09-30 13F ISHARES TR MBS ETF 464288588 2,982,948 144,959 5.11 264,999 0.17 0.3916
2023-08-21 2023-06-30 13F/A-1 ISHARES TR MBS ETF 464288588 2,837,989 185,200 6.98 264,559 5.24 0.4750
2023-08-10 2023-06-30 13F ISHARES TR MBS ETF 464288588 3,647,246 994,457 263,749 0.0715
2023-05-12 2023-03-31 13F ISHARES TR MBS ETF 464288588 2,652,789 457,070 20.82 251,377 23.39 0.4729
2023-02-10 2022-12-31 13F ISHARES TR MBS ETF 464288588 2,195,719 1,413,576 180.73 203,730 184.30 0.4126
2022-11-14 2022-09-30 13F ISHARES TR MBS ETF 464288588 782,143 -5,672 -0.72 71,660 -6.75 0.1638
2022-08-10 2022-06-30 13F ISHARES TR MBS ETF 464288588 787,815 -132,460 -14.39 76,844 -10.37 0.1695
2022-05-04 2022-03-31 13F ISHARES TR MBS ETF 464288588 920,275 -8,339 -0.90 85,736 -14.05 0.1664
2022-02-03 2021-12-31 13F ISHARES TR MBS ETF 464288588 928,614 33,509 3.74 99,746 3.01 0.1888
2021-11-05 2021-09-30 13F ISHARES TR MBS ETF 464288588 895,105 115,689 14.84 96,836 13.92 0.2018
2021-08-02 2021-06-30 13F ISHARES TR MBS ETF 464288588 779,416 58,071 8.05 85,003 8.69 0.1840
2021-05-13 2021-03-31 13F ISHARES TR MBS ETF 464288588 721,345 -352,971 -32.86 78,209 -33.91 0.1882
2021-02-10 2020-12-31 13F ISHARES TR MBS ETF 464288588 1,074,316 773,540 257.18 118,338 256.29 0.3160
2020-11-12 2020-09-30 13F ISHARES TR MBS ETF 464288588 300,776 22,872 8.23 33,214 7.94 0.0994
2020-08-14 2020-06-30 13F ISHARES TR MBS ETF 464288588 277,904 -653,068 -70.15 30,771 -64.17 0.1033
2020-05-18 2020-03-31 13F ISHARES TR MBS ETF 464288588 930,972 930,972 85,873 0.3516
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.