SL Green Realty Corp.
MX ˙ BMV ˙ US78440X8873
SecurityMX:SLG / SL Green Realty Corp.
InstitutionCitigroup Inc
Latest Disclosed Ownership84,183 shares
Latest Disclosed Value $ 3,109,720
Citigroup Inc ownership in SLG / SL Green Realty Corp.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 84,183 shares of SL Green Realty Corp. (MX:SLG) valued at $3,109,720 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 71,833 shares of SL Green Realty Corp.. This represents a change in shares of 17.19% during the quarter.

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

MX:SLG / SL Green Realty Corp. 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 SL GREEN RLTY COM 78440X887 84,183 12,350 17.19 3,110 -5.62 0.0007
2026-02-13 2025-12-31 13F SL GREEN RLTY COM 78440X887 71,833 20,157 39.01 3,295 6.60 0.0015
2025-11-10 2025-09-30 13F SL GREEN RLTY COM 78440X887 51,676 -49,235 -48.79 3,091 -50.53 0.0014
2025-08-11 2025-06-30 13F SL GREEN RLTY COM 78440X887 100,911 -9,092 -8.27 6,246 -1.59 0.0031
2025-05-12 2025-03-31 13F SL GREEN RLTY COM 78440X887 110,003 11,531 11.71 6,347 -5.10 0.0032
2025-02-12 2024-12-31 13F SL GREEN RLTY COM 78440X887 98,472 12,885 15.05 6,688 12.27 0.0040
2024-11-12 2024-09-30 13F SL GREEN RLTY COM 78440X887 85,587 30,220 54.58 5,958 90.02 0.0035
2024-08-12 2024-06-30 13F SL GREEN RLTY COM 78440X887 55,367 344 0.63 3,136 3.36 0.0020
2024-05-10 2024-03-31 13F SL GREEN RLTY COM 78440X887 55,023 -9,557 -14.80 3,033 3.98 0.0020
2024-02-09 2023-12-31 13F SL GREEN RLTY COM 78440X887 64,580 16,048 33.07 2,917 61.16 0.0021
2023-12-06 2023-09-30 13F/A-1 SL GREEN RLTY COM 78440X887 48,532 -22,950 -32.11 1,810 -15.74 0.0014
2023-11-09 2023-09-30 13F SL GREEN RLTY COM 78440X887 48,532 -22,950 1,810 0.0005
2023-08-10 2023-06-30 13F SL GREEN RLTY COM 78440X887 71,482 -25,567 -26.34 2,148 -5.87 0.0014
2023-05-11 2023-03-31 13F SL GREEN RLTY COM 78440X887 97,049 61,551 173.39 2,283 90.80 0.0016
2023-02-09 2022-12-31 13F SL GREEN RLTY COM 78440X887 35,498 -11,214 -24.01 1,197 -36.21 0.0010
2022-11-10 2022-09-30 13F SL GREEN RLTY COM 78440X887 46,712 6,127 15.10 1,875 0.11 0.0013
2022-08-10 2022-06-30 13F SL GREEN RLTY COM 78440X887 40,585 -39,539 -49.35 1,873 -71.21 0.0014
2022-05-12 2022-03-31 13F SL GREEN RLTY COM 78440X887 80,124 -8,153 -9.24 6,505 2.78 0.0040
2022-02-10 2021-12-31 13F SL GREEN RLTY COM 78440X804 88,277 -18,511 -17.33 6,329 -16.34 0.0034
2021-11-10 2021-09-30 13F SL GREEN RLTY COM 78440X804 106,788 -40,196 -27.35 7,565 -35.67 0.0045
2021-08-10 2021-06-30 13F SL GREEN RLTY COM 78440X804 146,984 28,981 24.56 11,760 42.39 0.0071
2021-05-13 2021-03-31 13F SL GREEN RLTY COM 78440X804 118,003 -60,702 -33.97 8,259 -22.43 0.0053
2021-02-11 2020-12-31 13F SL GREEN RLTY COM 78440X101 178,705 -18,581 -9.42 10,647 16.40 0.0063
2020-11-12 2020-09-30 13F SL GREEN RLTY COM 78440X101 197,286 96,348 95.45 9,147 83.86 0.0060
2020-08-12 2020-06-30 13F SL GREEN RLTY COM 78440X101 100,938 44,277 78.14 4,975 103.73 0.0039
2020-05-12 2020-03-31 13F SL GREEN RLTY COM 78440X101 56,661 -73,448 -56.45 2,442 -79.57 0.0022
2020-02-12 2019-12-31 13F SL GREEN RLTY COM 78440X101 130,109 -15,876 -10.88 11,954 0.16 0.0087
2019-11-08 2019-09-30 13F SL GREEN RLTY COM 78440X101 145,985 -7,437 -4.85 11,935 -3.21 0.0095
2019-08-12 2019-06-30 13F SL GREEN RLTY COM 78440X101 153,422 230 0.15 12,331 -10.48 0.0100
2019-05-13 2019-03-31 13F SL GREEN RLTY COM 78440X101 153,192 -44,559 -22.53 13,775 -11.91 0.0133
2019-02-12 2018-12-31 13F SL GREEN RLTY COM 78440X101 197,751 15,644 8.59 15,638 -11.95 0.0158
2018-11-13 2018-09-30 13F SL GREEN RLTY COM 78440X101 182,107 64,665 55.06 17,761 50.43 0.0158
2018-08-10 2018-06-30 13F SL GREEN RLTY COM 78440X101 117,442 -57,881 -33.01 11,807 -30.45 0.0109
2018-05-11 2018-03-31 13F SL GREEN RLTY COM 78440X101 175,323 -12,594 -6.70 16,976 -10.50 0.0140
2018-02-12 2017-12-31 13F SL GREEN RLTY COM 78440X101 187,917 2,768 1.50 18,967 1.10 0.0152
2017-11-13 2017-09-30 13F SL GREEN RLTY COM 78440X101 185,149 11,634 6.70 18,760 2.19 0.0154
2017-08-11 2017-06-30 13F SL GREEN RLTY COM 78440X101 173,515 31,963 22.58 18,358 21.63 0.0166
2017-05-12 2017-03-31 13F SL GREEN RLTY COM 78440X101 141,552 -65,249 -31.55 15,093 -32.14 0.0135
2017-02-10 2016-12-31 13F SL GREEN RLTY COM 78440X101 206,801 47,775 30.04 22,242 29.38 0.0200
2016-11-10 2016-09-30 13F SL GREEN RLTY COM 78440X101 159,026 101,868 178.22 17,191 182.47 0.0161
2016-08-12 2016-06-30 13F SL GREEN RLTY COM 78440X101 57,158 37,418 189.55 6,086 218.31 0.0062
2016-05-13 2016-03-31 13F SL GREEN RLTY COM 78440X101 19,740 3,391 20.74 1,912 3.52 0.0021
2016-02-12 2015-12-31 13F SL GREEN RLTY COM 78440X101 16,349 -41,673 -71.82 1,847 -70.57 0.0018
2015-11-13 2015-09-30 13F SL GREEN RLTY COM 78440X101 58,022 8,706 17.65 6,275 15.77 0.0059
2015-08-13 2015-06-30 13F SL GREEN RLTY COM 78440X101 49,316 16,907 52.17 5,420 30.26 0.0048
2015-05-14 2015-03-31 13F SL GREEN RLTY COM 78440X101 32,409 19,504 151.14 4,161 170.90 0.0040
2015-02-17 2014-12-31 13F SL GREEN RLTY COM 78440X101 12,905 5,345 70.70 1,536 100.52 0.0014
2014-11-14 2014-09-30 13F SL GREEN RLTY COM 78440X101 7,560 -47,441 -86.25 766 -87.27 0.0007
2014-08-14 2014-06-30 13F SL GREEN RLTY COM 78440X101 55,001 49,410 883.74 6,018 968.92 0.0058
2014-05-15 2014-03-31 13F SL GREEN RLTY COM 78440X101 5,591 -40,014 -87.74 563 -86.64 0.0006
2014-02-14 2013-12-31 13F SL GREEN RLTY COM 78440X101 45,605 14,087 44.70 4,213 50.46 0.0038
2013-11-14 2013-09-30 13F SL GREEN RLTY COM 78440X101 31,518 -35,530 -52.99 2,800 -52.65 0.0026
2013-08-14 2013-06-30 13F SL GREEN RLTY COM 78440X101 67,048 67,048 5,913 0.0058
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
(%)
2025-11-10 2025-09-30 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-08-11 2025-06-30 13F SL GREEN RLTY COM Call 297,000 18,384 n/a n/a n/a
2023-08-10 2023-06-30 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-05-11 2023-03-31 13F SL GREEN RLTY COM Call 31,200 734 n/a n/a n/a
2022-08-10 2022-06-30 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-12 2022-03-31 13F SL GREEN RLTY COM Call 28,900 2,346 n/a n/a n/a
2020-11-12 2020-09-30 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-08-12 2020-06-30 13F SL GREEN RLTY COM Call 25,000 1,232 n/a n/a n/a
2019-02-12 2018-12-31 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-11-13 2018-09-30 13F SL GREEN RLTY COM Call 100 -97.87 10 -97.88 n/a n/a n/a
2018-08-10 2018-06-30 13F SL GREEN RLTY COM Call 4,700 2.17 472 6.07 n/a n/a n/a
2018-05-11 2018-03-31 13F SL GREEN RLTY COM Call 4,600 -35.21 445 -37.94 n/a n/a n/a
2018-02-12 2017-12-31 13F SL GREEN RLTY COM Call 7,100 -45.38 717 -45.56 n/a n/a n/a
2017-11-13 2017-09-30 13F SL GREEN RLTY COM Call 13,000 46.07 1,317 39.81 n/a n/a n/a
2017-08-11 2017-06-30 13F SL GREEN RLTY COM Call 8,900 61.82 942 60.75 n/a n/a n/a
2017-05-12 2017-03-31 13F SL GREEN RLTY COM Call 5,500 -27.63 586 -28.27 n/a n/a n/a
2017-02-10 2016-12-31 13F SL GREEN RLTY COM Call 7,600 -62.38 817 -62.59 n/a n/a n/a
2016-11-10 2016-09-30 13F SL GREEN RLTY COM Call 20,200 2,184 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
(%)
2023-08-10 2023-06-30 13F SL GREEN RLTY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-05-11 2023-03-31 13F SL GREEN RLTY COM Put 400,000 9,408 n/a n/a n/a
2021-11-10 2021-09-30 13F SL GREEN RLTY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-10 2021-06-30 13F SL GREEN RLTY COM Put 100,000 8,000 n/a n/a n/a
2019-02-12 2018-12-31 13F SL GREEN RLTY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-11-13 2018-09-30 13F SL GREEN RLTY COM Put 2,000 -37.50 195 -39.44 n/a n/a n/a
2018-08-10 2018-06-30 13F SL GREEN RLTY COM Put 3,200 1,500.00 322 1,594.74 n/a n/a n/a
2018-05-11 2018-03-31 13F SL GREEN RLTY COM Put 200 -75.00 19 -76.54 n/a n/a n/a
2018-02-12 2017-12-31 13F SL GREEN RLTY COM Put 800 -96.40 81 -96.40 n/a n/a n/a
2017-11-13 2017-09-30 13F SL GREEN RLTY COM Put 22,200 -7.11 2,250 -11.03 n/a n/a n/a
2017-08-11 2017-06-30 13F SL GREEN RLTY COM Put 23,900 4,680.00 2,529 4,671.70 n/a n/a n/a
2017-05-12 2017-03-31 13F SL GREEN RLTY COM Put 500 0.00 53 -1.85 n/a n/a n/a
2017-02-10 2016-12-31 13F SL GREEN RLTY COM Put 500 54 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.