iShares Trust - iShares MBS ETF
US ˙ NasdaqGM ˙ US4642885887

SecurityMBB / iShares Trust - iShares MBS ETF
InstitutionAdvisory Services Network, LLC
Latest Disclosed Ownership55,623 shares
Latest Disclosed Value $ 5,281,328
Advisory Services Network, LLC reports 27.51% increase in ownership of MBB / iShares Trust - iShares MBS ETF

On May 15, 2026 - Advisory Services Network, LLC filed a 13F-HR form disclosing ownership of 55,623 shares of iShares Trust - iShares MBS ETF (US:MBB) valued at $5,281,404 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 43,623 shares of iShares Trust - iShares MBS ETF. This represents a change in shares of 27.51% during the quarter. The current value of the position is $5,240,243 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 MBS ETF ETF 464288588 55,623 12,000 27.51 5,281 27.16 0.0488
2026-02-17 2025-12-31 13F ISHARES MBS ETF ETF 464288588 43,623 3,972 10.02 4,154 10.10 0.0588
2025-11-18 2025-09-30 13F ISHARES TR ETF 464288588 39,651 -2,705 -6.39 3,773 -4.31 0.0553
2025-08-19 2025-06-30 13F ISHARES TR ETF 464288588 42,356 1,358 3.31 3,942 2.55 0.0634
2025-05-15 2025-03-31 13F ISHARES TR ETF 464288588 40,998 -19,341 -32.05 3,845 -30.50 0.0739
2025-02-13 2024-12-31 13F ISHARES TR ETF 464288588 60,339 664 1.11 5,532 0.97 0.1031
2024-11-14 2024-09-30 13F ISHARES TR ETF 464288588 59,675 0 0.00 5,479 0.00 0.1133
2024-08-13 2024-06-30 13F ISHARES TR ETF 464288588 59,675 6,080 11.34 5,479 10.60 0.1133
2024-05-06 2024-03-31 13F ISHARES TR ETF 464288588 53,595 9,633 21.91 4,953 19.78 0.1098
2024-02-09 2023-12-31 13F ISHARES TR ETF 464288588 43,962 -14,989 -25.43 4,136 -21.00 0.1011
2023-11-14 2023-09-30 13F ISHARES TR ETF 464288588 58,951 3,077 5.51 5,235 0.44 0.1406
2023-08-09 2023-06-30 13F ISHARES TR ETF 464288588 55,874 -17,939 -24.30 5,211 -25.47 0.1388
2023-05-17 2023-03-31 13F ISHARES TR ETF 464288588 73,813 21,092 40.01 6,992 43.01 0.1937
2023-02-13 2022-12-31 13F ISHARES TR ETF 464288588 52,721 29,399 126.06 4,890 128.89 0.1499
2022-11-14 2022-09-30 13F ISHARES TR ETF 464288588 23,322 2,087 9.83 2,136 3.19 0.0754
2022-08-02 2022-06-30 13F ISHARES TR ETF 464288588 21,235 715 3.48 2,070 -1.00 0.0708
2022-05-23 2022-03-31 13F ISHARES TR ETF 464288588 20,520 -13,136 -39.03 2,091 -42.19 0.0615
2022-02-14 2021-12-31 13F ISHARES TR ETF 464288588 33,656 -3,711 -9.93 3,617 -10.47 0.1041
2021-11-05 2021-09-30 13F ISHARES TR ETF 464288588 37,367 20,404 120.29 4,040 119.92 0.1285
2021-08-12 2021-06-30 13F ISHARES TR ETF 464288588 16,963 7,461 78.52 1,837 78.35 0.0580
2021-05-24 2021-03-31 13F ISHARES TR ETF 464288588 9,502 -3,003 -24.01 1,030 -25.20 0.0383
2021-02-09 2020-12-31 13F ISHARES TR ETF 464288588 12,505 9,999 399.00 1,377 398.91 0.0553
2020-11-16 2020-09-30 13F ISHARES TR ETF 464288588 2,506 438 21.18 276 20.52 0.0130
2020-08-10 2020-06-30 13F ISHARES MBS ETF ETF 464288588 2,068 -3,930 -65.52 229 -65.46 0.0126
2020-05-15 2020-03-31 13F ISHARES TR ETF 464288588 5,998 565 10.40 663 12.76 0.0434
2020-02-04 2019-12-31 13F ISHARES TR ETF 464288588 5,433 3,211 144.51 588 146.03 0.0309
2019-11-04 2019-09-30 13F ISHARES TR ETF 464288588 2,222 0 0.00 239 0.00 0.0146
2019-08-01 2019-06-30 13F ISHARES TR ETF 464288588 2,222 1,266 132.43 239 134.31 0.0147
2019-05-20 2019-03-31 13F ISHARES TR ETF 464288588 956 -14,581 -93.85 102 -93.73 0.0072
2019-02-15 2018-12-31 13F ISHARES TR ETF 464288588 15,537 14,577 1,518.44 1,626 1,542.42 0.1419
2018-11-02 2018-09-30 13F ISHARES TR ETF 464288588 960 9 0.95 99 0.00 0.0072
2018-07-27 2018-06-30 13F ISHARES TR ETF 464288588 951 -164 -14.71 99 -15.38 0.0075
2018-04-23 2018-03-31 13F ISHARES TR ETF 464288588 1,115 -497 -30.83 117 -31.98 0.0093
2018-02-08 2017-12-31 13F ISHARES TR ETF 464288588 1,612 -194 -10.74 172 -10.88 0.0150
2017-10-12 2017-09-30 13F ISHARES TR ETF 464288588 1,806 -3,973 -68.75 193 -68.72 0.0221
2017-08-17 2017-06-30 13F ISHARES MBS ETF ETF 464288588 5,779 -77 -1.31 617 -1.12 0.0804
2017-04-28 2017-03-31 13F ISHARES MBS ETF ETF 464288588 5,856 759 14.89 624 11.23 0.0906
2016-10-07 2016-09-30 13F ISHARES TR ETF 464288588 5,097 143 2.89 561 2.94 0.1055
2016-07-27 2016-06-30 13F ISHARES TR ETF 464288588 4,954 -851 -14.66 545 -14.31 0.1239
2016-04-21 2016-03-31 13F ISHARES TR ETF 464288588 5,805 4,365 303.12 636 310.32 0.1737
2016-01-27 2015-12-31 13F ISHARES MBS ETF ETF 464288588 1,440 -190 -11.66 155 -13.41 0.0498
2015-10-01 2015-09-30 13F ISHARES MBS BOND ETF ETF 464288588 1,630 655 67.18 179 68.87 0.0540
2015-07-02 2015-06-30 13F ISHARES MBS BOND ETF ETF 464288588 975 287 41.72 106 39.47 0.0313
2015-04-08 2015-03-31 13F ISHARES MBS BOND ETF ETF 464288588 688 328 91.11 76 90.00 0.0210
2015-01-23 2014-12-31 13F ISHARES MBS BOND ETF ETF 464288588 360 347 2,669.23 40 3,900.00 0.0125
2014-02-13 2013-12-31 13F ISHARES ETF 464288588 13 13 1 0.0005
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.