iShares Trust - iShares S&P 100 ETF
US ˙ ARCA ˙ US4642871010

SecurityOEF / iShares Trust - iShares S&P 100 ETF
InstitutionCitigroup Inc
Latest Disclosed Ownership1,437 shares
Latest Disclosed Value $ 457,067
Citigroup Inc ownership in OEF / iShares Trust - iShares S&P 100 ETF

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 1,437 shares of iShares Trust - iShares S&P 100 ETF (US:OEF) valued at $457,067 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 377 shares of iShares Trust - iShares S&P 100 ETF. This represents a change in shares of 281.17% during the quarter. The current value of the position is $524,333 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (OEF) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put 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.

OEF / iShares Trust - iShares S&P 100 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)
2026-05-11 2026-03-31 13F ISHARES TR S&P 100 ETF 464287101 1,437 1,060 281.17 457 254.26 0.0001
2026-02-13 2025-12-31 13F ISHARES TR S&P 100 ETF 464287101 377 -172,334 -99.78 129 -99.78 0.0001
2025-11-10 2025-09-30 13F ISHARES TR S&P 100 ETF 464287101 172,711 -225 -0.13 57,485 9.22 0.0256
2025-08-11 2025-06-30 13F ISHARES TR S&P 100 ETF 464287101 172,936 168 0.10 52,633 12.49 0.0259
2025-05-12 2025-03-31 13F ISHARES TR S&P 100 ETF 464287101 172,768 -69 -0.04 46,791 -6.28 0.0239
2025-02-12 2024-12-31 13F ISHARES TR S&P 100 ETF 464287101 172,837 -16,755 -8.84 49,924 -4.86 0.0296
2024-11-12 2024-09-30 13F ISHARES TR S&P 100 ETF 464287101 189,592 16,284 9.40 52,471 14.55 0.0304
2024-08-12 2024-06-30 13F ISHARES TR S&P 100 ETF 464287101 173,308 170,631 6,373.96 45,805 6,819.18 0.0293
2024-05-10 2024-03-31 13F ISHARES TR S&P 100 ETF 464287101 2,677 -30 -1.11 662 9.60 0.0004
2024-02-09 2023-12-31 13F ISHARES TR S&P 100 ETF 464287101 2,707 30 1.12 605 12.48 0.0004
2023-12-06 2023-09-30 13F/A-1 ISHARES TR S&P 100 ETF 464287101 2,677 0 0.00 537 -3.07 0.0004
2023-11-09 2023-09-30 13F ISHARES TR S&P 100 ETF 464287101 2,677 0 537 0.0002
2023-08-10 2023-06-30 13F ISHARES TR S&P 100 ETF 464287101 2,677 146 5.77 554 17.12 0.0004
2023-05-11 2023-03-31 13F ISHARES TR S&P 100 ETF 464287101 2,531 954 60.49 473 76.49 0.0003
2023-02-09 2022-12-31 13F ISHARES TR S&P 100 ETF 464287101 1,577 0 0.00 269 4.69 0.0002
2022-11-10 2022-09-30 13F ISHARES TR S&P 100 ETF 464287101 1,577 0 0.00 256 -5.88 0.0002
2022-08-10 2022-06-30 13F ISHARES TR S&P 100 ETF 464287101 1,577 0 0.00 272 -17.33 0.0002
2022-05-12 2022-03-31 13F ISHARES TR S&P 100 ETF 464287101 1,577 0 0.00 329 -4.91 0.0002
2022-02-10 2021-12-31 13F ISHARES TR S&P 100 ETF 464287101 1,577 0 0.00 346 11.25 0.0002
2021-11-10 2021-09-30 13F ISHARES TR S&P 100 ETF 464287101 1,577 -2,036 -56.35 311 -56.14 0.0002
2021-08-10 2021-06-30 13F ISHARES TR S&P 100 ETF 464287101 3,613 2 0.06 709 9.24 0.0004
2021-05-13 2021-03-31 13F ISHARES TR S&P 100 ETF 464287101 3,611 -212 -5.55 649 -1.07 0.0004
2021-02-11 2020-12-31 13F ISHARES TR S&P 100 ETF 464287101 3,823 373 10.81 656 21.93 0.0004
2020-11-12 2020-09-30 13F ISHARES TR S&P 100 ETF 464287101 3,450 -10,031 -74.41 538 -71.98 0.0004
2020-08-12 2020-06-30 13F ISHARES TR S&P 100 ETF 464287101 13,481 1,021 8.19 1,920 29.91 0.0015
2020-05-12 2020-03-31 13F ISHARES TR S&P 100 ETF 464287101 12,460 -2,342 -15.82 1,478 -30.71 0.0013
2020-02-12 2019-12-31 13F ISHARES TR S&P 100 ETF 464287101 14,802 945 6.82 2,133 17.07 0.0015
2019-11-08 2019-09-30 13F ISHARES TR S&P 100 ETF 464287101 13,857 -124 -0.89 1,822 0.55 0.0014
2019-08-12 2019-06-30 13F ISHARES TR S&P 100 ETF 464287101 13,981 -44,603 -76.14 1,812 -75.31 0.0015
2019-05-13 2019-03-31 13F ISHARES TR S&P 100 ETF 464287101 58,584 400 0.69 7,339 13.10 0.0071
2019-02-12 2018-12-31 13F ISHARES TR S&P 100 ETF 464287101 58,184 -150 -0.26 6,489 -14.18 0.0066
2018-11-13 2018-09-30 13F ISHARES TR S&P 100 ETF 464287101 58,334 -28,900 -33.13 7,561 -27.53 0.0067
2018-08-10 2018-06-30 13F ISHARES TR S&P 100 ETF 464287101 87,234 15,208 21.11 10,433 24.98 0.0096
2018-05-11 2018-03-31 13F ISHARES TR S&P 100 ETF 464287101 72,026 -50,985 -41.45 8,348 -42.80 0.0069
2018-02-12 2017-12-31 13F ISHARES TR S&P 100 ETF 464287101 123,011 -3,149 -2.50 14,594 3.94 0.0117
2017-11-13 2017-09-30 13F ISHARES TR S&P 100 ETF 464287101 126,160 6,809 5.71 14,041 10.05 0.0115
2017-08-11 2017-06-30 13F ISHARES TR S&P 100 ETF 464287101 119,351 40 0.03 12,759 2.14 0.0115
2017-05-12 2017-03-31 13F ISHARES TR S&P 100 ETF 464287101 119,311 -8,059 -6.33 12,492 -1.23 0.0111
2017-02-10 2016-12-31 13F ISHARES TR S&P 100 ETF 464287101 127,370 -40,812 -24.27 12,648 -21.61 0.0114
2016-11-10 2016-09-30 13F ISHARES TR S&P 100 ETF 464287101 168,182 5,129 3.15 16,134 6.51 0.0151
2016-08-12 2016-06-30 13F ISHARES TR S&P 100 ETF 464287101 163,053 -80,268 -32.99 15,148 -31.87 0.0155
2016-05-13 2016-03-31 13F ISHARES TR S&P 100 ETF 464287101 243,321 -726,796 -74.92 22,233 -74.86 0.0250
2016-02-12 2015-12-31 13F ISHARES TR S&P 100 ETF 464287101 970,117 803,607 482.62 88,446 526.57 0.0881
2015-11-13 2015-09-30 13F ISHARES TR S&P 100 ETF 464287101 166,510 38,097 29.67 14,116 21.01 0.0132
2015-08-13 2015-06-30 13F ISHARES TR S&P 100 ETF 464287101 128,413 16,747 15.00 11,665 15.75 0.0104
2015-05-14 2015-03-31 13F ISHARES TR S&P 100 ETF 464287101 111,666 -98,168 -46.78 10,078 -47.19 0.0097
2015-02-17 2014-12-31 13F ISHARES TR S&P 100 ETF 464287101 209,834 101,652 93.96 19,083 100.09 0.0170
2014-11-14 2014-09-30 13F ISHARES TR S&P 100 ETF 464287101 108,182 -189,135 -63.61 9,537 -62.93 0.0083
2014-08-14 2014-06-30 13F ISHARES S&P 100 ETF 464287101 297,317 -115,883 -28.05 25,726 -24.82 0.0247
2014-05-15 2014-03-31 13F ISHARES S&P 100 ETF 464287101 413,200 -100,607 -19.58 34,217 -19.13 0.0350
2014-02-14 2013-12-31 13F ISHARES S&P 100 ETF 464287101 513,807 241,797 88.89 42,312 107.85 0.0383
2013-11-14 2013-09-30 13F ISHARES S&P 100 ETF 464287101 272,010 -594,133 -68.60 20,357 -67.33 0.0191
2013-08-14 2013-06-30 13F ISHARES TR S&P 100 IDX FD 464287101 866,143 866,143 62,319 0.0614
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
(%)
2021-05-13 2021-03-31 13F ISHARES TR S&P 100 ETF Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F ISHARES TR S&P 100 ETF Call 3,100 -54.41 532 -49.76 n/a n/a n/a
2020-11-12 2020-09-30 13F ISHARES TR S&P 100 ETF Call 6,800 518.18 1,059 574.52 n/a n/a n/a
2020-08-12 2020-06-30 13F ISHARES TR S&P 100 ETF Call 1,100 157 n/a n/a n/a
2020-02-12 2019-12-31 13F ISHARES TR S&P 100 ETF Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-11-08 2019-09-30 13F ISHARES TR S&P 100 ETF Call 700 0.00 92 1.10 n/a n/a n/a
2019-08-12 2019-06-30 13F ISHARES TR S&P 100 ETF Call 700 -85.42 91 -84.86 n/a n/a n/a
2019-05-13 2019-03-31 13F ISHARES TR S&P 100 ETF Call 4,800 26.32 601 41.75 n/a n/a n/a
2019-02-12 2018-12-31 13F ISHARES TR S&P 100 ETF Call 3,800 -17.39 424 -28.86 n/a n/a n/a
2018-11-13 2018-09-30 13F ISHARES TR S&P 100 ETF Call 4,600 -41.03 596 -36.12 n/a n/a n/a
2018-08-10 2018-06-30 13F ISHARES TR S&P 100 ETF Call 7,800 -51.25 933 -49.68 n/a n/a n/a
2018-05-11 2018-03-31 13F ISHARES TR S&P 100 ETF Call 16,000 8.84 1,854 6.31 n/a n/a n/a
2018-02-12 2017-12-31 13F ISHARES TR S&P 100 ETF Call 14,700 -70.00 1,744 -68.02 n/a n/a n/a
2017-11-13 2017-09-30 13F ISHARES TR S&P 100 ETF Call 49,000 1.87 5,454 6.07 n/a n/a n/a
2017-08-11 2017-06-30 13F ISHARES TR S&P 100 ETF Call 48,100 -11.74 5,142 -9.88 n/a n/a n/a
2017-05-12 2017-03-31 13F ISHARES TR S&P 100 ETF Call 54,500 89.24 5,706 99.51 n/a n/a n/a
2017-02-10 2016-12-31 13F ISHARES TR S&P 100 ETF Call 28,800 -62.55 2,860 -61.23 n/a n/a n/a
2016-11-10 2016-09-30 13F ISHARES TR S&P 100 ETF Call 76,900 -41.48 7,377 -39.57 n/a n/a n/a
2016-08-12 2016-06-30 13F ISHARES TR S&P 100 ETF Call 131,400 23.73 12,207 25.81 n/a n/a n/a
2016-05-13 2016-03-31 13F ISHARES TR S&P 100 ETF Call 106,200 0.00 9,703 0.22 n/a n/a n/a
2016-02-12 2015-12-31 13F ISHARES TR S&P 100 ETF Call 106,200 -23.49 9,682 -17.72 n/a n/a n/a
2015-11-13 2015-09-30 13F ISHARES TR S&P 100 ETF Call 138,800 15.38 11,767 7.68 n/a n/a n/a
2015-08-13 2015-06-30 13F ISHARES TR S&P 100 ETF Call 120,300 4.43 10,928 5.10 n/a n/a n/a
2015-05-14 2015-03-31 13F ISHARES TR S&P 100 ETF Call 115,200 -15.73 10,398 -16.35 n/a n/a n/a
2015-02-17 2014-12-31 13F ISHARES TR S&P 100 ETF Call 136,700 638.92 12,431 662.17 n/a n/a n/a
2014-11-14 2014-09-30 13F ISHARES TR S&P 100 ETF Call 18,500 77.88 1,631 81.22 n/a n/a n/a
2014-08-14 2014-06-30 13F ISHARES S&P 100 ETF Call 10,400 96.23 900 105.01 n/a n/a n/a
2014-05-15 2014-03-31 13F ISHARES S&P 100 ETF Call 5,300 -94.42 439 -94.38 n/a n/a n/a
2014-02-14 2013-12-31 13F ISHARES S&P 100 ETF Call 94,900 -28.27 7,815 -21.07 n/a n/a n/a
2013-11-14 2013-09-30 13F ISHARES S&P 100 ETF Call 132,300 0.30 9,901 4.33 n/a n/a n/a
2013-08-14 2013-06-30 13F ISHARES TR S&P 100 IDX FD Call 131,900 9,490 n/a n/a n/a
Disclosed Put 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
(%)
2021-02-11 2020-12-31 13F ISHARES TR S&P 100 ETF Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-11-12 2020-09-30 13F ISHARES TR S&P 100 ETF Put 37,600 3,318.18 5,855 3,629.30 n/a n/a n/a
2020-08-12 2020-06-30 13F ISHARES TR S&P 100 ETF Put 1,100 -52.17 157 -42.49 n/a n/a n/a
2020-05-12 2020-03-31 13F ISHARES TR S&P 100 ETF Put 2,300 273 n/a n/a n/a
2020-02-12 2019-12-31 13F ISHARES TR S&P 100 ETF Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-11-08 2019-09-30 13F ISHARES TR S&P 100 ETF Put 800 0.00 105 0.96 n/a n/a n/a
2019-08-12 2019-06-30 13F ISHARES TR S&P 100 ETF Put 800 -20.00 104 -16.80 n/a n/a n/a
2019-05-13 2019-03-31 13F ISHARES TR S&P 100 ETF Put 1,000 0.00 125 11.61 n/a n/a n/a
2019-02-12 2018-12-31 13F ISHARES TR S&P 100 ETF Put 1,000 -85.07 112 -87.10 n/a n/a n/a
2018-11-13 2018-09-30 13F ISHARES TR S&P 100 ETF Put 6,700 91.43 868 107.16 n/a n/a n/a
2018-08-10 2018-06-30 13F ISHARES TR S&P 100 ETF Put 3,500 -90.25 419 -89.93 n/a n/a n/a
2018-05-11 2018-03-31 13F ISHARES TR S&P 100 ETF Put 35,900 1.99 4,161 -0.36 n/a n/a n/a
2018-02-12 2017-12-31 13F ISHARES TR S&P 100 ETF Put 35,200 -0.85 4,176 5.69 n/a n/a n/a
2017-11-13 2017-09-30 13F ISHARES TR S&P 100 ETF Put 35,500 0.00 3,951 4.11 n/a n/a n/a
2017-08-11 2017-06-30 13F ISHARES TR S&P 100 ETF Put 35,500 0.00 3,795 2.10 n/a n/a n/a
2017-05-12 2017-03-31 13F ISHARES TR S&P 100 ETF Put 35,500 -1.11 3,717 4.26 n/a n/a n/a
2017-02-10 2016-12-31 13F ISHARES TR S&P 100 ETF Put 35,900 -50.62 3,565 -48.88 n/a n/a n/a
2016-11-10 2016-09-30 13F ISHARES TR S&P 100 ETF Put 72,700 77.32 6,974 83.09 n/a n/a n/a
2016-08-12 2016-06-30 13F ISHARES TR S&P 100 ETF Put 41,000 -31.32 3,809 -30.17 n/a n/a n/a
2016-05-13 2016-03-31 13F ISHARES TR S&P 100 ETF Put 59,700 41.81 5,455 42.13 n/a n/a n/a
2016-02-12 2015-12-31 13F ISHARES TR S&P 100 ETF Put 42,100 -73.00 3,838 -70.96 n/a n/a n/a
2015-11-13 2015-09-30 13F ISHARES TR S&P 100 ETF Put 155,900 78.99 13,217 67.05 n/a n/a n/a
2015-08-13 2015-06-30 13F ISHARES TR S&P 100 ETF Put 87,100 22.16 7,912 22.93 n/a n/a n/a
2015-05-14 2015-03-31 13F ISHARES TR S&P 100 ETF Put 71,300 204.70 6,436 202.44 n/a n/a n/a
2015-02-17 2014-12-31 13F ISHARES TR S&P 100 ETF Put 23,400 -64.86 2,128 -63.75 n/a n/a n/a
2014-11-14 2014-09-30 13F ISHARES TR S&P 100 ETF Put 66,600 198.65 5,871 204.20 n/a n/a n/a
2014-08-14 2014-06-30 13F ISHARES S&P 100 ETF Put 22,300 110.38 1,930 119.82 n/a n/a n/a
2014-05-15 2014-03-31 13F ISHARES S&P 100 ETF Put 10,600 -42.39 878 -42.05 n/a n/a n/a
2014-02-14 2013-12-31 13F ISHARES S&P 100 ETF Put 18,400 -75.73 1,515 -73.29 n/a n/a n/a
2013-11-14 2013-09-30 13F ISHARES S&P 100 ETF Put 75,800 166.90 5,673 177.68 n/a n/a n/a
2013-08-14 2013-06-30 13F ISHARES TR S&P 100 IDX FD Put 28,400 2,043 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.