Kilroy Realty Corporation
US ˙ NYSE ˙ US49427F1084

SecurityKRC / Kilroy Realty Corporation
InstitutionCitigroup Inc
Latest Disclosed Ownership324,694 shares
Latest Disclosed Value $ 9,159,618
Citigroup Inc ownership in KRC / Kilroy Realty Corporation

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 324,694 shares of Kilroy Realty Corporation (US:KRC) valued at $9,159,618 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 116,615 shares of Kilroy Realty Corporation. This represents a change in shares of 178.43% during the quarter. The current value of the position is $11,977,962 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (KRC) 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.

KRC / Kilroy Realty Corporation 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 KILROY REALTY COM 49427F108 324,694 208,079 178.43 9,160 110.21 0.0039
2026-02-13 2025-12-31 13F KILROY RLTY COM 49427F108 116,615 33,245 39.88 4,358 23.71 0.0019
2025-11-10 2025-09-30 13F KILROY RLTY COM 49427F108 83,370 -4,526 -5.15 3,522 16.82 0.0016
2025-08-11 2025-06-30 13F KILROY RLTY COM 49427F108 87,896 44,853 104.21 3,016 113.83 0.0015
2025-05-12 2025-03-31 13F KILROY RLTY COM 49427F108 43,043 10,300 31.46 1,410 6.50 0.0007
2025-02-12 2024-12-31 13F KILROY RLTY COM 49427F108 32,743 -31,810 -49.28 1,324 -47.00 0.0008
2024-11-12 2024-09-30 13F KILROY RLTY COM 49427F108 64,553 -22,382 -25.75 2,498 -7.79 0.0014
2024-08-12 2024-06-30 13F KILROY RLTY COM 49427F108 86,935 -17,991 -17.15 2,710 -29.12 0.0017
2024-05-10 2024-03-31 13F KILROY RLTY COM 49427F108 104,926 -42,445 -28.80 3,822 -34.90 0.0025
2024-02-09 2023-12-31 13F KILROY RLTY COM 49427F108 147,371 109,012 284.19 5,871 384.41 0.0041
2023-12-06 2023-09-30 13F/A-1 KILROY RLTY COM 49427F108 38,359 9,450 32.69 1,213 39.47 0.0009
2023-11-09 2023-09-30 13F KILROY RLTY COM 49427F108 38,359 9,450 1,213 0.0004
2023-08-10 2023-06-30 13F KILROY RLTY COM 49427F108 28,909 -55,037 -65.56 870 -68.04 0.0006
2023-05-11 2023-03-31 13F KILROY RLTY COM 49427F108 83,946 37,325 80.06 2,720 50.89 0.0019
2023-02-09 2022-12-31 13F KILROY RLTY COM 49427F108 46,621 -22,069 -32.13 1,803 -37.69 0.0014
2022-11-10 2022-09-30 13F KILROY RLTY COM 49427F108 68,690 13,231 23.86 2,892 -0.34 0.0021
2022-08-10 2022-06-30 13F KILROY RLTY COM 49427F108 55,459 -35,594 -39.09 2,902 -58.29 0.0022
2022-05-12 2022-03-31 13F KILROY RLTY COM 49427F108 91,053 -30,884 -25.33 6,958 -14.14 0.0042
2022-02-10 2021-12-31 13F KILROY RLTY COM 49427F108 121,937 -31,255 -20.40 8,104 -20.10 0.0043
2021-11-10 2021-09-30 13F KILROY RLTY COM 49427F108 153,192 -56,197 -26.84 10,143 -30.44 0.0060
2021-08-10 2021-06-30 13F KILROY RLTY COM 49427F108 209,389 43,715 26.39 14,581 34.09 0.0088
2021-05-13 2021-03-31 13F KILROY RLTY COM 49427F108 165,674 -50,181 -23.25 10,874 -12.24 0.0070
2021-02-11 2020-12-31 13F KILROY RLTY COM 49427F108 215,855 -1,801 -0.83 12,390 9.56 0.0073
2020-11-12 2020-09-30 13F KILROY RLTY COM 49427F108 217,656 96,263 79.30 11,309 58.72 0.0074
2020-08-12 2020-06-30 13F KILROY RLTY COM 49427F108 121,393 38,960 47.26 7,125 35.69 0.0056
2020-05-12 2020-03-31 13F KILROY RLTY COM 49427F108 82,433 -31,946 -27.93 5,251 -45.28 0.0047
2020-02-12 2019-12-31 13F KILROY RLTY COM 49427F108 114,379 58,582 104.99 9,596 120.80 0.0069
2019-11-08 2019-09-30 13F KILROY RLTY COM 49427F108 55,797 -89,646 -61.64 4,346 -59.52 0.0034
2019-08-12 2019-06-30 13F KILROY RLTY COM 49427F108 145,443 43,127 42.15 10,735 38.12 0.0087
2019-05-13 2019-03-31 13F KILROY RLTY COM 49427F108 102,316 48,188 89.03 7,772 128.39 0.0075
2019-02-12 2018-12-31 13F KILROY RLTY COM 49427F108 54,128 -83,230 -60.59 3,403 -65.44 0.0034
2018-11-13 2018-09-30 13F KILROY RLTY COM 49427F108 137,358 61,958 82.17 9,847 72.66 0.0088
2018-08-10 2018-06-30 13F KILROY RLTY COM 49427F108 75,400 -282,952 -78.96 5,703 -77.57 0.0052
2018-05-11 2018-03-31 13F KILROY RLTY COM 49427F108 358,352 287,991 409.30 25,429 384.09 0.0209
2018-02-12 2017-12-31 13F KILROY RLTY COM 49427F108 70,361 -87,322 -55.38 5,253 -53.16 0.0042
2017-11-13 2017-09-30 13F KILROY RLTY COM 49427F108 157,683 29,210 22.74 11,215 16.16 0.0092
2017-08-11 2017-06-30 13F KILROY RLTY COM 49427F108 128,473 21,001 19.54 9,655 24.63 0.0087
2017-05-12 2017-03-31 13F KILROY RLTY COM 49427F108 107,472 23,023 27.26 7,747 25.30 0.0069
2017-02-10 2016-12-31 13F KILROY RLTY COM 49427F108 84,449 -113,188 -57.27 6,183 -54.89 0.0056
2016-11-10 2016-09-30 13F KILROY RLTY COM 49427F108 197,637 190,640 2,724.60 13,707 2,854.09 0.0128
2016-08-12 2016-06-30 13F KILROY RLTY COM 49427F108 6,997 -75,242 -91.49 464 -90.88 0.0005
2016-05-13 2016-03-31 13F KILROY RLTY COM 49427F108 82,239 67,044 441.22 5,088 428.90 0.0057
2016-02-12 2015-12-31 13F KILROY RLTY COM 49427F108 15,195 -33,749 -68.95 962 -69.84 0.0010
2015-11-13 2015-09-30 13F KILROY RLTY COM 49427F108 48,944 25,223 106.33 3,190 100.25 0.0030
2015-08-13 2015-06-30 13F KILROY RLTY COM 49427F108 23,721 831 3.63 1,593 -8.66 0.0014
2015-05-14 2015-03-31 13F KILROY RLTY COM 49427F108 22,890 12,929 129.80 1,744 153.49 0.0017
2015-02-17 2014-12-31 13F KILROY RLTY COM 49427F108 9,961 3,217 47.70 688 71.57 0.0006
2014-11-14 2014-09-30 13F KILROY RLTY COM 49427F108 6,744 -5,991 -47.04 401 -49.43 0.0004
2014-08-14 2014-06-30 13F KILROY RLTY COM 49427F108 12,735 7,494 142.99 793 159.15 0.0008
2014-05-15 2014-03-31 13F KILROY RLTY COM 49427F108 5,241 -32,147 -85.98 306 -83.71 0.0003
2014-02-14 2013-12-31 13F KILROY RLTY COM 49427F108 37,388 16,142 75.98 1,878 77.00 0.0017
2013-11-14 2013-09-30 13F KILROY RLTY COM 49427F108 21,246 -41,273 -66.02 1,061 -67.98 0.0010
2013-08-14 2013-06-30 13F KILROY RLTY COM 49427F108 62,519 62,519 3,314 0.0033
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
(%)
2016-11-10 2016-09-30 13F KILROY RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-08-12 2016-06-30 13F KILROY RLTY COM Call 50,000 61.81 3,315 102.38 n/a n/a n/a
2013-11-14 2013-09-30 13F KILROY RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2013-08-14 2013-06-30 13F KILROY RLTY COM Call 30,900 1,638 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 KILROY RLTY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-11-12 2020-09-30 13F KILROY RLTY COM Put 140,000 0.00 7,274 -11.49 n/a n/a n/a
2020-08-12 2020-06-30 13F KILROY RLTY COM Put 140,000 8,218 n/a n/a n/a
2018-11-13 2018-09-30 13F KILROY RLTY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-08-10 2018-06-30 13F KILROY RLTY COM Put 220,000 0.00 16,641 6.60 n/a n/a n/a
2018-05-11 2018-03-31 13F KILROY RLTY COM Put 220,000 15,611 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.