SL Green Realty Corp.
US ˙ NYSE ˙ US78440X8873

SecuritySLG / SL Green Realty Corp.
InstitutionCaption Management, LLC
Latest Disclosed Ownership7,500 shares
Latest Disclosed Value $ 277,050
Caption Management, LLC ownership in SLG / SL Green Realty Corp.

On May 15, 2026 - Caption Management, LLC filed a 13F-HR form disclosing ownership of 7,500 shares of SL Green Realty Corp. (US:SLG) valued at $277,050 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 shares of SL Green Realty Corp.. The current value of the position is $333,825 USD.

Caption Management, LLC 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 17,500 of underlying shares valued at $646,450 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.

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)
2026-05-15 2026-03-31 13F SL GREEN RLTY COM 78440X887 7,500 7,500 277 0.0016
2026-02-17 2025-12-31 13F SL GREEN RLTY COM 78440X887 0 -6,300 -100.00 0 -100.00
2025-11-14 2025-09-30 13F SL GREEN RLTY COM 78440X887 6,300 -13,291 -67.84 377 -68.98 0.0029
2025-08-14 2025-06-30 13F SL GREEN RLTY COM 78440X887 19,591 19,591 1,213 0.0134
2025-05-15 2025-03-31 13F SL GREEN RLTY COM 78440X887 0 -1,770 -100.00 0 -100.00
2025-02-14 2024-12-31 13F SL GREEN RLTY COM 78440X887 1,770 1,770 120 0.0011
2024-02-14 2023-12-31 13F SL GREEN RLTY COM 78440X887 0 -19,255 -100.00 0 -100.00
2023-11-14 2023-09-30 13F SL GREEN RLTY COM 78440X887 19,255 -10,745 -35.82 718 -20.31 0.0111
2023-08-14 2023-06-30 13F SL GREEN RLTY COM 78440X887 30,000 30,000 902 0.0160
2021-05-17 2021-03-31 13F SL GREEN RLTY COM 78440X101 0 -6,500 -100.00 0 -100.00
2021-02-16 2020-12-31 13F SL GREEN RLTY COM 78440X101 6,500 -11,690 -64.27 399 -52.67 0.0091
2020-11-16 2020-09-30 13F SL GREEN RLTY COM 78440X101 18,190 4,500 32.87 843 24.89 0.0197
2020-08-14 2020-06-30 13F SL GREEN RLTY COM 78440X101 13,690 13,690 675 0.0225
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 SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2026-02-17 2025-12-31 13F SL GREEN RLTY COM Call 100,000 4,587 n/a n/a n/a
2025-08-14 2025-06-30 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F SL GREEN RLTY COM Call 105,000 320.00 6,058 256.77 n/a n/a n/a
2025-02-14 2024-12-31 13F SL GREEN RLTY COM Call 25,000 0.00 1,698 -2.41 n/a n/a n/a
2024-11-14 2024-09-30 13F SL GREEN RLTY COM Call 25,000 1,740 n/a n/a n/a
2024-08-14 2024-06-30 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F SL GREEN RLTY COM Call 133,600 7,365 n/a n/a n/a
2024-02-14 2023-12-31 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-14 2023-09-30 13F SL GREEN RLTY COM Call 23,000 -73.41 858 -67.03 n/a n/a n/a
2023-08-14 2023-06-30 13F SL GREEN RLTY COM Call 86,500 2,599 n/a n/a n/a
2023-05-15 2023-03-31 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F SL GREEN RLTY COM Call 25,000 843 n/a n/a n/a
2020-11-16 2020-09-30 13F SL GREEN RLTY COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-08-14 2020-06-30 13F SL GREEN RLTY COM Call 25,000 1,231 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 SL GREEN RLTY COM Put 17,500 646 n/a n/a n/a
2026-02-17 2025-12-31 13F SL GREEN RLTY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F SL GREEN RLTY COM Put 45,000 -83.02 2,691 -83.59 n/a n/a n/a
2025-08-14 2025-06-30 13F SL GREEN RLTY COM Put 265,000 16,404 n/a n/a n/a
2025-05-15 2025-03-31 13F SL GREEN RLTY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-14 2024-12-31 13F SL GREEN RLTY COM Put 25,000 0.00 1,698 -2.41 n/a n/a n/a
2024-11-14 2024-09-30 13F SL GREEN RLTY COM Put 25,000 1,740 n/a n/a n/a
2024-05-15 2024-03-31 13F SL GREEN RLTY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-14 2023-12-31 13F SL GREEN RLTY COM Put 22,500 1,016 n/a n/a n/a
2023-11-14 2023-09-30 13F SL GREEN RLTY COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-08-14 2023-06-30 13F SL GREEN RLTY COM Put 26,500 -96.86 796 -95.99 n/a n/a n/a
2023-05-15 2023-03-31 13F SL GREEN RLTY COM Put 843,600 19,841 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.