iShares Trust - iShares Core S&P 500 ETF
US ˙ ARCA ˙ US4642872000

SecurityIVV / iShares Trust - iShares Core S&P 500 ETF
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership4,060,750 shares
Latest Disclosed Value $ 2,652,522,508
Citadel Advisors Llc ownership in IVV / iShares Trust - iShares Core S&P 500 ETF

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 4,060,750 shares of iShares Trust - iShares Core S&P 500 ETF (US:IVV) valued at $2,652,522,508 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 74,320 shares of iShares Trust - iShares Core S&P 500 ETF. This represents a change in shares of 5,363.87% during the quarter. The current value of the position is $3,008,650,282 USD.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (IVV) in the form of stock options. The firm currently holds call options representing 255,800 of underlying shares valued at $167,091,118 USD and put options representing 144,300 of underlying shares valued at $94,258,203 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.

IVV / iShares Trust - iShares Core S&P 500 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)
2026-05-15 2026-03-31 13F ISHARES TR CORE S&P500 ETF 464287200 4,060,750 3,986,430 5,363.87 2,652,523 5,110.83 0.3775
2026-02-17 2025-12-31 13F ISHARES TR CORE S&P500 ETF 464287200 74,320 29,251 64.90 50,905 68.76 0.0068
2025-11-14 2025-09-30 13F ISHARES TR CORE S&P500 ETF 464287200 45,069 27,931 162.98 30,165 183.50 0.0041
2025-08-14 2025-06-30 13F ISHARES TR CORE S&P500 ETF 464287200 17,138 17,138 10,641 0.0018
2025-05-15 2025-03-31 13F ISHARES TR CORE S&P500 ETF 464287200 0 -90,338 -100.00 0 -100.00
2025-02-14 2024-12-31 13F ISHARES TR CORE S&P500 ETF 464287200 90,338 25,902 40.20 53,180 43.08 0.0092
2024-11-14 2024-09-30 13F ISHARES TR CORE S&P500 ETF 464287200 64,436 -321,805 -83.32 37,168 -82.42 0.0072
2024-08-14 2024-06-30 13F ISHARES TR CORE S&P500 ETF 464287200 386,241 272,916 240.83 211,363 254.77 0.0428
2024-05-15 2024-03-31 13F ISHARES TR CORE S&P500 ETF 464287200 113,325 93,398 468.70 59,578 526.02 0.0115
2024-02-14 2023-12-31 13F ISHARES TR CORE S&P500 ETF 464287200 19,927 19,927 9,518 0.0019
2023-11-14 2023-09-30 13F ISHARES TR CORE S&P500 ETF 464287200 0 -273,013 -100.00 0 -100.00
2023-08-14 2023-06-30 13F ISHARES TR CORE S&P500 ETF 464287200 273,013 184,671 209.04 121,685 235.08 0.0252
2023-05-15 2023-03-31 13F ISHARES TR CORE S&P500 ETF 464287200 88,342 60,617 218.64 36,316 240.92 0.0080
2023-02-14 2022-12-31 13F ISHARES TR CORE S&P500 ETF 464287200 27,725 19,327 230.14 10,652 253.65 0.0025
2022-11-14 2022-09-30 13F ISHARES TR CORE S&P500 ETF 464287200 8,398 -48,718 -85.30 3,012 -86.09 0.0007
2022-08-15 2022-06-30 13F ISHARES TR CORE S&P500 ETF 464287200 57,116 50,841 810.22 21,656 660.66 0.0056
2022-05-16 2022-03-31 13F ISHARES TR CORE S&P500 ETF 464287200 6,275 -6,102 -49.30 2,847 -51.78 0.0006
2022-02-14 2021-12-31 13F ISHARES TR CORE S&P500 ETF 464287200 12,377 -79,236 -86.49 5,904 -85.04 0.0012
2021-11-15 2021-09-30 13F ISHARES TR Cmn 464287200 91,613 91,613 39,469 0.0082
2021-08-16 2021-06-30 13F ISHARES TR CORE S&P500 ETF 464287200 0 -11,293 -100.00 0 -100.00
2021-05-21 2021-03-31 13F/A-1 ISHARES TR CORE S&P500 ETF 464287200 11,293 -3,332,080 -99.66 4,493 -99.64 0.0011
2021-05-17 2021-03-31 13F ISHARES TR CORE S&P500 ETF 464287200 11,293 -3,332,080 4,493 0.0011
2021-02-16 2020-12-31 13F ISHARES TR CORE S&P500 ETF 464287200 3,343,373 3,272,788 4,636.66 1,255,069 5,190.96 0.3263
2020-11-16 2020-09-30 13F ISHARES TR CORE S&P500 ETF 464287200 70,585 34,885 97.72 23,721 114.55 0.0067
2020-08-14 2020-06-30 13F ISHARES TR Cmn 464287200 35,700 35,700 11,056 0.0039
2020-05-15 2020-03-31 13F ISHARES TR Cmn 464287200 0 -60,433 -100.00 0 -100.00
2020-02-14 2019-12-31 13F ISHARES TR Cmn 464287200 60,433 60,433 19,534 0.0085
2019-05-15 2019-03-31 13F ISHARES TR Cmn 464287200 0 -79,945 -100.00 0 -100.00
2019-02-14 2018-12-31 13F ISHARES TR Cmn 464287200 79,945 79,945 20,115 0.0110
2018-11-13 2018-09-30 13F ISHARES TR Cmn 464287200 0 -24,033 -100.00 0 -100.00
2018-08-14 2018-06-30 13F/A-1 ISHARES TR Cmn 464287200 24,033 24,033 6,562 0.0032
2018-08-10 2018-06-30 13F ISHARES TR Cmn 464287200 24,033 24,033 6,562
2018-05-14 2018-03-31 13F/A-1 ISHARES TR Cmn 464287200 0 -3,159 -100.00 0 -100.00
2018-02-09 2017-12-31 13F ISHARES TR Cmn 464287200 3,159 3,159 849 0.0005
2017-11-09 2017-09-30 13F ISHARES TR Cmn 464287200 0 -55,884 -100.00 0 -100.00
2017-08-11 2017-06-30 13F ISHARES TR Cmn 464287200 55,884 55,884 13,603 0.0115
2017-01-31 2015-12-31 13F/A-1 ISHARES CORE S&P 500 ETF Cmn 464287200 0 -9,696 -100.00 0 -100.00
2015-11-16 2015-09-30 13F ISHARES CORE S&P 500 ETF Cmn 464287200 9,696 -91,857 -90.45 1,869 -91.10 0.0018
2015-06-26 2014-12-31 13F/A-2 ISHARES CORE S&P 500 ETF Cmn 464287200 101,553 101,553 21,011 0.1160
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
(%)
2026-05-15 2026-03-31 13F ISHARES TR CORE S&P500 ETF Call 255,800 3.90 167,091 -0.91 n/a n/a n/a
2026-02-17 2025-12-31 13F ISHARES TR CORE S&P500 ETF Call 246,200 -20.96 168,632 -19.12 n/a n/a n/a
2025-11-14 2025-09-30 13F ISHARES TR CORE S&P500 ETF Call 311,500 -51.31 208,487 -47.52 n/a n/a n/a
2025-08-14 2025-06-30 13F ISHARES TR CORE S&P500 ETF Call 639,800 105.00 397,252 126.52 n/a n/a n/a
2025-05-15 2025-03-31 13F ISHARES TR CORE S&P500 ETF Call 312,100 111.31 175,369 101.69 n/a n/a n/a
2025-02-14 2024-12-31 13F ISHARES TR CORE S&P500 ETF Call 147,700 -18.35 86,948 -16.67 n/a n/a n/a
2024-11-14 2024-09-30 13F ISHARES TR CORE S&P500 ETF Call 180,900 61.66 104,347 70.40 n/a n/a n/a
2024-08-14 2024-06-30 13F ISHARES TR CORE S&P500 ETF Call 111,900 36.96 61,235 42.57 n/a n/a n/a
2024-05-15 2024-03-31 13F ISHARES TR CORE S&P500 ETF Call 81,700 -34.17 42,952 -27.54 n/a n/a n/a
2024-02-14 2023-12-31 13F ISHARES TR CORE S&P500 ETF Call 124,100 10.31 59,274 22.69 n/a n/a n/a
2023-11-14 2023-09-30 13F ISHARES TR CORE S&P500 ETF Call 112,500 165.33 48,311 155.64 n/a n/a n/a
2023-08-14 2023-06-30 13F ISHARES TR CORE S&P500 ETF Call 42,400 -47.33 18,898 -42.89 n/a n/a n/a
2023-05-15 2023-03-31 13F ISHARES TR CORE S&P500 ETF Call 80,500 -24.70 33,092 -19.43 n/a n/a n/a
2023-02-14 2022-12-31 13F ISHARES TR CORE S&P500 ETF Call 106,900 -45.60 41,072 -41.72 n/a n/a n/a
2022-11-14 2022-09-30 13F ISHARES TR CORE S&P500 ETF Call 196,500 -34.89 70,475 -38.41 n/a n/a n/a
2022-08-15 2022-06-30 13F ISHARES TR CORE S&P500 ETF Call 301,800 109.29 114,427 74.91 n/a n/a n/a
2022-05-16 2022-03-31 13F ISHARES TR CORE S&P500 ETF Call 144,200 72.49 65,422 64.06 n/a n/a n/a
2022-02-14 2021-12-31 13F ISHARES TR CORE S&P500 ETF Call 83,600 100.00 39,876 121.43 n/a n/a n/a
2021-11-15 2021-09-30 13F ISHARES TR Cmn Call 41,800 -17.23 18,008 -17.06 n/a n/a n/a
2021-08-16 2021-06-30 13F ISHARES TR CORE S&P500 ETF Call 50,500 10.50 21,711 19.42 n/a n/a n/a
2021-05-21 2021-03-31 13F/A ISHARES TR CORE S&P500 ETF Call 45,700 -1.08 18,180 4.83 n/a n/a n/a
2021-05-17 2021-03-31 13F ISHARES TR CORE S&P500 ETF Call 45,700 18,180 n/a n/a n/a
2021-02-16 2020-12-31 13F ISHARES TR CORE S&P500 ETF Call 46,200 -23.89 17,343 -14.98 n/a n/a n/a
2020-11-16 2020-09-30 13F ISHARES TR CORE S&P500 ETF Call 60,700 34.29 20,399 45.73 n/a n/a n/a
2020-08-14 2020-06-30 13F ISHARES TR Cmn Call 45,200 -46.45 13,998 -35.82 n/a n/a n/a
2020-05-15 2020-03-31 13F ISHARES TR Cmn Call 84,400 1,909.52 21,809 1,505.96 n/a n/a n/a
2020-02-14 2019-12-31 13F ISHARES TR Cmn Call 4,200 1,358 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
(%)
2026-05-15 2026-03-31 13F ISHARES TR CORE S&P500 ETF Put 144,300 -45.59 94,258 -48.11 n/a n/a n/a
2026-02-17 2025-12-31 13F ISHARES TR CORE S&P500 ETF Put 265,200 -7.08 181,646 -4.91 n/a n/a n/a
2025-11-14 2025-09-30 13F ISHARES TR CORE S&P500 ETF Put 285,400 112.83 191,018 129.42 n/a n/a n/a
2025-08-14 2025-06-30 13F ISHARES TR CORE S&P500 ETF Put 134,100 -31.96 83,263 -24.82 n/a n/a n/a
2025-05-15 2025-03-31 13F ISHARES TR CORE S&P500 ETF Put 197,100 -59.85 110,750 -61.68 n/a n/a n/a
2025-02-14 2024-12-31 13F ISHARES TR CORE S&P500 ETF Put 490,900 545.07 288,983 558.34 n/a n/a n/a
2024-11-14 2024-09-30 13F ISHARES TR CORE S&P500 ETF Put 76,100 -31.26 43,896 -27.54 n/a n/a n/a
2024-08-14 2024-06-30 13F ISHARES TR CORE S&P500 ETF Put 110,700 -0.54 60,578 3.53 n/a n/a n/a
2024-05-15 2024-03-31 13F ISHARES TR CORE S&P500 ETF Put 111,300 -75.13 58,514 -72.63 n/a n/a n/a
2024-02-14 2023-12-31 13F ISHARES TR CORE S&P500 ETF Put 447,600 692.21 213,787 781.16 n/a n/a n/a
2023-11-14 2023-09-30 13F ISHARES TR CORE S&P500 ETF Put 56,500 161.57 24,263 152.02 n/a n/a n/a
2023-08-14 2023-06-30 13F ISHARES TR CORE S&P500 ETF Put 21,600 78.51 9,627 93.55 n/a n/a n/a
2023-05-15 2023-03-31 13F ISHARES TR CORE S&P500 ETF Put 12,100 -69.44 4,974 -67.31 n/a n/a n/a
2023-02-14 2022-12-31 13F ISHARES TR CORE S&P500 ETF Put 39,600 30.69 15,215 40.00 n/a n/a n/a
2022-11-14 2022-09-30 13F ISHARES TR CORE S&P500 ETF Put 30,300 -62.55 10,867 -64.57 n/a n/a n/a
2022-08-15 2022-06-30 13F ISHARES TR CORE S&P500 ETF Put 80,900 -54.75 30,673 -62.19 n/a n/a n/a
2022-05-16 2022-03-31 13F ISHARES TR CORE S&P500 ETF Put 178,800 47.65 81,120 40.44 n/a n/a n/a
2022-02-14 2021-12-31 13F ISHARES TR CORE S&P500 ETF Put 121,100 40.49 57,763 55.54 n/a n/a n/a
2021-11-15 2021-09-30 13F ISHARES TR Cmn Put 86,200 95.46 37,137 95.88 n/a n/a n/a
2021-08-16 2021-06-30 13F ISHARES TR CORE S&P500 ETF Put 44,100 48.48 18,959 60.47 n/a n/a n/a
2021-05-21 2021-03-31 13F/A ISHARES TR CORE S&P500 ETF Put 29,700 -32.35 11,815 -28.31 n/a n/a n/a
2021-05-17 2021-03-31 13F ISHARES TR CORE S&P500 ETF Put 29,700 11,815 n/a n/a n/a
2021-02-16 2020-12-31 13F ISHARES TR CORE S&P500 ETF Put 43,900 4.03 16,480 16.20 n/a n/a n/a
2020-11-16 2020-09-30 13F ISHARES TR CORE S&P500 ETF Put 42,200 -12.45 14,182 -4.99 n/a n/a n/a
2020-08-14 2020-06-30 13F ISHARES TR Cmn Put 48,200 13.15 14,927 35.60 n/a n/a n/a
2020-05-15 2020-03-31 13F ISHARES TR Cmn Put 42,600 587.10 11,008 449.30 n/a n/a n/a
2020-02-14 2019-12-31 13F ISHARES TR Cmn Put 6,200 2,004 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.