iShares Trust - iShares Core Universal USD Bond ETF
US ˙ NasdaqGM ˙ US46434V6130

SecurityIUSB / iShares Trust - iShares Core Universal USD Bond ETF
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership56,014 shares
Latest Disclosed Value $ 2,606,896
Parallel Advisors, LLC ownership in IUSB / iShares Trust - iShares Core Universal USD Bond ETF

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 56,014 shares of iShares Trust - iShares Core Universal USD Bond ETF (US:IUSB) valued at $2,606,892 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 50,530 shares of iShares Trust - iShares Core Universal USD Bond ETF. This represents a change in shares of 10.85% during the quarter. The current value of the position is $2,573,283 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (IUSB) 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.

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Institutional Put/Call Ratios
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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.

IUSB / iShares Trust - iShares Core Universal USD 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)
2026-02-11 2025-12-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 56,014 5,484 10.85 2,607 10.42 0.0477
2025-11-13 2025-09-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 50,530 25 0.05 2,360 1.11 0.0432
2025-07-08 2025-06-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 50,505 10,471 26.16 2,335 26.57 0.0467
2025-04-08 2025-03-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 40,034 -148 -0.37 1,845 1.54 0.0416
2025-02-10 2024-12-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 40,182 38,865 2,951.03 1,816 2,829.03 0.0409
2024-11-13 2024-09-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,317 107 8.84 62 14.81 0.0015
2024-08-08 2024-06-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,210 0 0.00 55 -1.82 0.0014
2024-05-06 2024-03-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,210 -1,262 -51.05 55 -51.33 0.0015
2024-02-12 2023-12-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 2,472 2,251 1,018.55 114 1,155.56 0.0034
2024-05-20 2023-09-30 13F/A-1 ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 221 44 24.86 10 12.50 0.0003
2023-11-14 2023-09-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 221 44 10 0.0003
2024-05-20 2023-06-30 13F/A-1 ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 177 -1,608 -90.08 8 -90.24 0.0003
2023-08-04 2023-06-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 177 -1,608 8 0.0003
2024-05-20 2023-03-31 13F/A-1 ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,785 -1,635 -47.81 82 -46.41 0.0028
2023-04-25 2023-03-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,785 -1,635 82 0.0028
2023-02-06 2022-12-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 3,420 1,377 67.40 154 68.13 0.0067
2022-11-10 2022-09-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 2,043 -4,568 -69.10 91 -70.65 0.0042
2022-08-01 2022-06-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 6,611 -3,099 -31.92 310 -35.68 0.0142
2022-04-28 2022-03-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 9,710 -2,332 -19.37 482 -24.33 0.0191
2022-01-20 2021-12-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 12,042 -1,358 -10.13 637 -10.66 0.0236
2021-11-02 2021-09-30 13F/A-1 ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 13,400 10,140 311.04 713 309.77 0.0288
2021-08-06 2021-06-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 3,260 1,601 96.50 174 97.73 0.0074
2021-04-23 2021-03-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,659 107 6.89 88 3.53 0.0042
2021-02-02 2020-12-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,552 0 0.00 85 1.19 0.0046
2020-10-27 2020-09-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,552 0 0.00 84 0.00 0.0052
2020-07-16 2020-06-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,552 0 0.00 84 3.70 0.0055
2020-04-27 2020-03-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 1,552 -30,972 -95.23 81 -95.22 0.0066
2020-01-30 2019-12-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 32,524 554 1.73 1,695 1.13 0.1271
2019-11-01 2019-09-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 31,970 5,628 21.37 1,676 23.14 0.1435
2019-08-05 2019-06-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 26,342 -1,100 -4.01 1,361 -2.02 0.1328
2019-05-01 2019-03-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 27,442 814 3.06 1,389 5.95 0.1559
2019-02-05 2018-12-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 26,628 -1,310 -4.69 1,311 -4.52 0.1828
2018-11-01 2018-09-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 27,938 369 1.34 1,373 0.96 0.1705
2018-07-30 2018-06-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 27,569 23,125 520.36 1,360 512.61 0.1945
2018-05-08 2018-03-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF 46434V613 4,444 4,444 222 0.0347
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
(%)
2022-01-19 2021-12-31 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F ISHARES CORE TOTAL USD BOND MARKET ETF ETF Call 3,260 174 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.