iShares Trust - iShares Core U.S. Aggregate Bond ETF
CL ˙ SNSE ˙ US4642872265
SecurityCL:AGG / iShares Trust - iShares Core U.S. Aggregate Bond ETF
InstitutionHighTower Advisors, LLC
Latest Disclosed Ownership2,013,080 shares
Latest Disclosed Value $ 199,838,704
HighTower Advisors, LLC ownership in AGG / iShares Trust - iShares Core U.S. Aggregate Bond ETF

On May 5, 2026 - HighTower Advisors, LLC filed a 13F-HR form disclosing ownership of 2,013,080 shares of iShares Trust - iShares Core U.S. Aggregate Bond ETF (CL:AGG) valued at $199,838,704 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 2,266,698 shares of iShares Trust - iShares Core U.S. Aggregate Bond ETF. This represents a change in shares of -11.19% during the quarter.

HighTower Advisors, LLC has a history of taking positions in derivatives of the underlying security (AGG) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

CL:AGG / iShares Trust - iShares Core U.S. Aggregate Bond ETF Historical Put/Call Ratio
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)
2026-05-05 2026-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 2,013,080 -253,618 -11.19 199,839 -11.73 0.2121
2026-02-06 2025-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 2,266,698 94,828 4.37 226,398 3.98 0.2476
2025-11-07 2025-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 2,171,870 40,856 1.92 217,732 3.00 0.2472
2025-08-11 2025-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 2,131,014 116,964 5.81 211,397 6.11 0.2648
2025-05-13 2025-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 2,014,050 51,546 2.63 199,230 4.77 0.2704
2025-02-07 2024-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 1,962,504 76,147 4.04 190,167 -0.47 0.2600
2024-11-14 2024-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 1,886,357 -29,880 -1.56 191,060 2.72 0.2729
2024-08-13 2024-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 1,916,237 -120,323 -5.91 186,008 -6.74 0.2876
2024-05-06 2024-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 2,036,560 124,123 6.49 199,451 5.13 0.3231
2024-02-12 2023-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 1,912,437 363,181 23.44 189,712 30.24 0.3184
2023-11-08 2023-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 1,549,256 685,565 79.38 145,666 72.23 0.2737
2023-08-14 2023-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 863,691 100,185 13.12 84,575 11.30 0.1665
2023-05-12 2023-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 763,506 510 0.07 75,987 2.74 0.1658
2023-02-09 2022-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 762,996 37,385 5.15 73,963 5.84 0.1691
2022-11-09 2022-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 725,611 -61,807 -7.85 69,883 -12.69 0.1872
2022-08-10 2022-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 787,418 -108,758 -12.14 80,041 -16.56 0.2068
2022-05-12 2022-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 896,176 -19,665 -2.15 95,923 -8.14 0.2138
2022-02-10 2021-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 915,841 -46,119 -4.79 104,422 -5.47 0.2289
2021-11-12 2021-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 961,960 20,752 2.20 110,461 1.79 0.2957
2021-08-06 2021-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 941,208 10,113 1.09 108,520 2.42 0.3142
2021-05-10 2021-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 931,095 73,268 8.54 105,954 4.48 0.3345
2021-02-10 2020-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 857,827 231,661 37.00 101,409 37.21 0.4224
2020-11-13 2020-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 626,166 18,317 3.01 73,909 2.86 0.3569
2020-08-10 2020-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 607,849 -31,397 -4.91 71,852 -2.51 0.3920
2020-05-21 2020-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 639,246 86,250 15.60 73,699 18.65 0.4778
2020-02-14 2019-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 552,996 79,647 16.83 62,115 15.98 0.3671
2019-11-12 2019-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 473,349 30,648 6.92 53,558 8.76 0.2916
2019-08-13 2019-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 442,701 101,019 29.57 49,243 32.16 0.2931
2019-05-15 2019-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 341,682 -6,529 -1.88 37,260 0.49 0.2489
2019-02-14 2018-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 348,211 -136,251 -28.12 37,077 -27.49 0.2844
2018-11-09 2018-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 484,462 186,143 62.40 51,137 61.21 0.3686
2018-08-14 2018-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 298,319 -21,569 -6.74 31,720 -7.61 0.2484
2018-05-15 2018-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 319,888 -13,657 -4.09 34,333 -5.88 0.2876
2018-02-14 2017-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 333,545 -30,442 -8.36 36,477 -8.55 0.2994
2017-11-14 2017-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 363,987 17,712 5.12 39,886 5.24 0.3403
2017-09-22 2017-06-30 13F/A-1 ISHARES TR CORE US AGGBD ET 464287226 346,275 -36,484 -9.53 37,899 -8.68 0.3390
2017-08-14 2017-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 346,275 -36,484 37,899
2017-05-15 2017-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 382,759 59,821 18.52 41,501 18.94 0.3972
2017-02-10 2016-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 322,938 -93,997 -22.54 34,893 -25.55 0.3791
2016-11-14 2016-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 416,935 129,088 44.85 46,866 44.60 0.5430
2016-08-11 2016-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 287,847 47,108 19.57 32,410 21.45 0.4100
2016-05-16 2016-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 240,739 -183,039 -43.19 26,686 -41.71 0.0870
2016-05-18 2015-12-31 13F/A-1 ISHARES TR CORE US AGGBD ET 464287226 423,778 -439,923 -50.93 45,780 -51.63 0.5438
2016-02-12 2015-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 423,778 45,780
2015-11-16 2015-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 863,701 -3,857 -0.44 94,637 0.27 1.2527
2015-08-11 2015-06-30 13F ISHARES TR CORE US AGGBD ET 464287226 867,558 186,580 27.40 94,383 24.38 1.5126
2015-05-15 2015-03-31 13F ISHARES TR CORE US AGGBD ET 464287226 680,978 330,727 94.43 75,881 96.74 1.1290
2015-02-17 2014-12-31 13F ISHARES TR CORE US AGGBD ET 464287226 350,251 25,674 7.91 38,570 7.46 0.5904
2014-11-14 2014-09-30 13F ISHARES TR CORE US AGGBD ET 464287226 324,577 49,236 17.88 35,894 19.16 0.6065
2014-08-13 2014-06-30 13F ISHARES CORE TOTUSBD ETF 464287226 275,341 21,869 8.63 30,122 8.90 0.5226
2014-05-15 2014-03-31 13F ISHARES CORE TOTUSBD ETF 464287226 253,472 186,099 276.22 27,659 285.71 0.5397
2014-02-14 2013-12-31 13F ISHARES CORE TOTUSBD ETF 464287226 67,373 56,791 536.68 7,171 532.36 0.1474
2013-11-15 2013-09-30 13F ISHARES CORE TOTUSBD ETF 464287226 10,582 -13,304 -55.70 1,134 -55.72 0.0284
2013-08-14 2013-06-30 13F ISHARES TR CORE TOTUSBD ETF 464287226 23,886 23,886 2,561 0.0697
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-08-10 2022-06-30 13F ISHARES TR CORE US AGGBD ET Call 0 -100.00 0 n/a n/a n/a
2022-05-12 2022-03-31 13F ISHARES TR CORE US AGGBD ET Call 1 0 n/a n/a n/a
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.