iShares Trust - iShares MBS ETF
US ˙ NasdaqGM ˙ US4642885887

SecurityMBB / iShares Trust - iShares MBS ETF
InstitutionCwm, Llc
Latest Disclosed Ownership1,927,060 shares
Latest Disclosed Value $ 182,974,342
Cwm, Llc reports 0.89% increase in ownership of MBB / iShares Trust - iShares MBS ETF

On May 14, 2026 - Cwm, Llc filed a 13F-HR form disclosing ownership of 1,927,060 shares of iShares Trust - iShares MBS ETF (US:MBB) valued at $182,974,347 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 1,910,110 shares of iShares Trust - iShares MBS ETF. This represents a change in shares of 0.89% during the quarter. The current value of the position is $181,548,323 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)
2026-05-14 2026-03-31 13F ISHARES TR MBS ETF 464288588 1,927,060 16,950 0.89 182,974 100,990.61 0.4757
2026-01-26 2025-12-31 13F ISHARES TR MBS ETF 464288588 1,910,110 7,207 0.38 182 0.00 0.4928
2025-10-15 2025-09-30 13F ISHARES TR MBS ETF 464288588 1,902,903 -34,919 -1.80 181 0.00 0.5445
2025-07-25 2025-06-30 13F ISHARES TR MBS ETF 464288588 1,937,822 -81,970 -4.06 182 -4.23 0.6416
2025-05-01 2025-03-31 13F ISHARES TR MBS ETF 464288588 2,019,792 -357,818 -15.05 189 -12.90 0.7554
2025-02-04 2024-12-31 13F ISHARES TR MBS ETF 464288588 2,377,610 -12,367 -0.52 218 -4.82 0.9047
2024-10-08 2024-09-30 13F ISHARES TR MBS ETF 464288588 2,389,977 154,109 6.89 229 11.22 0.9848
2024-07-10 2024-06-30 13F ISHARES TR MBS ETF 464288588 2,235,868 -85,868 -3.70 205 -4.21 0.9677
2024-04-05 2024-03-31 13F ISHARES TR MBS ETF 464288588 2,321,736 -6,304 -0.27 215 -2.28 1.0433
2024-02-01 2023-12-31 13F ISHARES TR MBS ETF 464288588 2,328,040 -252,607 -9.79 219 -4.37 1.1774
2023-10-11 2023-09-30 13F ISHARES TR MBS ETF 464288588 2,580,647 -715,046 -21.70 229 -25.41 1.4044
2023-08-03 2023-06-30 13F ISHARES TR MBS ETF 464288588 3,295,693 -33,244 -1.00 307 -2.54 1.8995
2023-05-01 2023-03-31 13F ISHARES TR MBS ETF 464288588 3,328,937 1,162,118 53.63 315 57.50 2.1308
2023-02-01 2022-12-31 13F ISHARES TR MBS ETF 464288588 2,166,819 1,669,965 336.11 201 -99.56 1.4803
2022-10-27 2022-09-30 13F ISHARES TR MBS ETF 464288588 496,854 -170,845 -25.59 45,502 -30.10 0.3615
2022-07-28 2022-06-30 13F ISHARES TR MBS ETF 464288588 667,699 -60,700 -8.33 65,094 -12.27 0.5043
2022-04-21 2022-03-31 13F ISHARES TR MBS ETF 464288588 728,399 -41,775 -5.42 74,202 -10.32 0.5263
2022-01-31 2021-12-31 13F ISHARES TR MBS ETF 464288588 770,174 62,901 8.89 82,740 8.09 0.5825
2021-09-15 2021-06-30 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 0 0.00 76,548 0.00 0.6101
2021-07-29 2021-06-30 13F ISHARES TR MBS ETF 464288588 707,273 0 76,548 0.6101
2021-09-15 2021-03-31 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 0 0.00 76,548 0.00 0.6101
2021-04-27 2021-03-31 13F ISHARES TR MBS ETF 464288588 705,727 -1,546 76,515 0.6730
2021-09-15 2020-12-31 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 0 0.00 76,548 0.00 0.6101
2021-01-27 2020-12-31 13F ISHARES TR MBS ETF 464288588 1,171,163 463,890 128,980 1.2088
2021-09-15 2020-09-30 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 0 0.00 76,548 0.00 0.6101
2020-10-19 2020-09-30 13F ISHARES TR MBS ETF 464288588 152,821 -554,452 16,871 0.1876
2021-09-15 2020-06-30 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 0 0.00 76,548 0.00 0.6101
2020-07-22 2020-06-30 13F ISHARES TR MBS ETF 464288588 97,232 -610,041 10,764 0.1277
2021-09-15 2020-03-31 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 0 0.00 76,548 0.00 0.6101
2020-04-28 2020-03-31 13F ISHARES TR MBS ETF 464288588 1,200,528 493,255 132,586 1.9741
2021-09-14 2019-12-31 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 0 0.00 76,548 0.00 0.6101
2020-01-27 2019-12-31 13F ISHARES TR MBS ETF 464288588 1,624,863 917,590 175,583 2.2433
2021-09-14 2019-09-30 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 0 0.00 76,548 0.00 0.6101
2019-10-22 2019-09-30 13F ISHARES TR MBS ETF 464288588 1,381,523 674,250 149,619 2.1780
2021-09-14 2019-06-30 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 0 0.00 76,548 0.00 0.6101
2019-07-31 2019-06-30 13F ISHARES TR MBS ETF 464288588 548,002 -159,271 58,965 0.9753
2021-09-02 2019-03-31 13F/A-1 ISHARES TR MBS ETF 464288588 707,273 702,064 13,477.90 76,548 13,945.50 0.6101
2019-04-22 2019-03-31 13F ISHARES TR MBS ETF 464288588 35,531 30,322 3,779 0.0758
2019-01-25 2018-12-31 13F ISHARES TR MBS ETF 464288588 5,209 2,787 115.07 545 118.00 0.0136
2018-10-29 2018-09-30 13F ISHARES TR MBS ETF 464288588 2,422 -20,828 -89.58 250 -89.68 0.0064
2018-07-31 2018-06-30 13F ISHARES TR MBS ETF 464288588 23,250 4,890 26.63 2,422 26.08 0.0797
2018-04-26 2018-03-31 13F ISHARES TR MBS ETF 464288588 18,360 3,138 20.61 1,921 18.43 0.0763
2018-01-16 2017-12-31 13F ISHARES TR MBS ETF 464288588 15,222 3,643 31.46 1,622 30.81 0.0720
2017-10-16 2017-09-30 13F ISHARES TR MBS ETF 464288588 11,579 1,918 19.85 1,240 20.27 0.0586
2017-07-17 2017-06-30 13F ISHARES TR MBS ETF 464288588 9,661 -10,242 -51.46 1,031 -51.39 0.0528
2017-04-17 2017-03-31 13F ISHARES TR MBS ETF 464288588 19,903 415 2.13 2,121 2.36 0.1199
2017-01-19 2016-12-31 13F ISHARES TR MBS ETF 464288588 19,488 -14,132 -42.03 2,072 -44.02 0.1270
2016-10-17 2016-09-30 13F ISHARES TR MBS ETF 464288588 33,620 4,331 14.79 3,701 14.90 0.2555
2016-07-21 2016-06-30 13F ISHARES TR MBS ETF 464288588 29,289 19,721 206.11 3,221 207.35 0.2349
2016-04-18 2016-03-31 13F ISHARES TR MBS ETF 464288588 9,568 3,103 48.00 1,048 50.57 0.0920
2016-02-01 2015-12-31 13F ISHARES TR MBS ETF 464288588 6,465 2,028 45.71 696 43.21 0.0680
2015-10-30 2015-09-30 13F ISHARES TR MBS ETF 464288588 4,437 4,437 0.00 486 0.0489
2015-07-09 2015-06-30 13F ISHARES MBS ETF 464288588 0 -4,124 -100.00 0 -100.00
2015-04-30 2015-03-31 13F ISHARES MBS ETF 464288588 4,124 4,124 0.00 455 0.0461
2014-08-14 2014-06-30 13F ISHARES MBS ETF 464288588 0 -3,397 -100.00 0 -100.00
2014-05-16 2014-03-31 13F ISHARES MBS ETF 464288588 3,397 328 10.69 361 12.11 0.0492
2014-02-14 2013-12-31 13F ISHARES MBS ETF 464288588 3,069 -1,281 -29.45 322 -30.15 0.0502
2013-11-14 2013-09-30 13F ISHARES MBS ETF 464288588 4,350 4,350 461 0.1209
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.