Citigroup Inc.
MX ˙ BMV ˙ US1729674242
SecurityMX:C / Citigroup Inc.
InstitutionPeak6 Llc
Latest Disclosed Ownership25,240 shares
Latest Disclosed Value $ 2,862,468
Peak6 Llc ownership in C / Citigroup Inc.

On May 14, 2026 - Peak6 Llc filed a 13F-HR form disclosing ownership of 25,240 shares of Citigroup Inc. (MX:C) valued at $2,862,468 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 12, 2026 disclosing 203,351 shares of Citigroup Inc.. This represents a change in shares of -87.59% during the quarter.

Peak6 Llc has a history of taking positions in derivatives of the underlying security (C) in the form of stock options. The firm currently holds call options representing 35,600 of underlying shares valued at $4,037,396 USD and put options representing 118,600 of underlying shares valued at $13,450,426 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:C / Citigroup Inc. 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)
2026-05-14 2026-03-31 13F CITIGROUP COM NEW 172967424 25,240 -178,111 -87.59 2,862 -87.94 0.0065
2026-03-12 2025-12-31 13F/A-1 CITIGROUP COM NEW 172967424 203,351 -189,744 -48.27 23,729 -40.53 0.0441
2026-02-13 2025-12-31 13F CITIGROUP COM NEW 172967424 203,351 -189,744 23,729
2026-03-30 2025-09-30 13F/A-1 CITIGROUP COM NEW 172967424 393,095 222,413 130.31 39,899 174.64 0.0584
2025-11-14 2025-09-30 13F CITIGROUP COM NEW 172967424 393,095 222,413 39,899 0.0587
2026-03-26 2025-06-30 13F/A-2 CITIGROUPINC COM NEW 172967424 170,682 170,682 14,528 0.0269
2025-11-13 2025-06-30 13F/A-1 CITIGROUPINC COM NEW 172967424 170,682 170,682 14,528 0.0270
2025-08-14 2025-06-30 13F CITIGROUPINC COM NEW 172967424 170,682 170,682 14,528 0.0269
2025-05-14 2025-03-31 13F CITIGROUP COM NEW 172967424 0 -5,233 -100.00 0 -100.00
2025-02-13 2024-12-31 13F CITIGROUP COM NEW 172967424 5,233 5,233 368 0.0008
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
(%)
2026-05-14 2026-03-31 13F CITIGROUP COM NEW Call 35,600 -75.86 4,037 -76.54 n/a n/a n/a
2026-03-12 2025-12-31 13F/A CITIGROUP COM NEW Call 147,500 152.57 17,212 190.38 n/a n/a n/a
2026-02-13 2025-12-31 13F CITIGROUP COM NEW Call 147,500 17,212 n/a n/a n/a
2026-03-30 2025-09-30 13F/A CITIGROUP COM NEW Call 58,400 -81.14 5,928 -77.51 n/a n/a n/a
2025-11-14 2025-09-30 13F CITIGROUP COM NEW Call 58,400 5,928 n/a n/a n/a
2025-11-13 2025-06-30 13F/A CITIGROUPINC COM NEW Call 309,600 26,353 n/a n/a n/a
2026-03-26 2025-06-30 13F/A CITIGROUPINC COM NEW Call 309,600 148.67 26,353 198.18 n/a n/a n/a
2025-08-14 2025-06-30 13F CITIGROUPINC COM NEW Call 309,600 26,353 n/a n/a n/a
2025-05-14 2025-03-31 13F CITIGROUP COM NEW Call 124,500 -4.30 8,838 -3.48 n/a n/a n/a
2025-02-13 2024-12-31 13F CITIGROUP COM NEW Call 130,100 9,158 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
(%)
2026-05-14 2026-03-31 13F CITIGROUP COM NEW Put 118,600 -52.14 13,450 -53.48 n/a n/a n/a
2026-03-12 2025-12-31 13F/A CITIGROUP COM NEW Put 247,800 -28.61 28,916 -17.93 n/a n/a n/a
2026-02-13 2025-12-31 13F CITIGROUP COM NEW Put 247,800 28,916 n/a n/a n/a
2026-03-30 2025-09-30 13F/A CITIGROUP COM NEW Put 347,100 48.21 35,231 76.72 n/a n/a n/a
2025-11-14 2025-09-30 13F CITIGROUP COM NEW Put 347,100 35,231 n/a n/a n/a
2025-11-13 2025-06-30 13F/A CITIGROUPINC COM NEW Put 234,200 19,935 n/a n/a n/a
2026-03-26 2025-06-30 13F/A CITIGROUPINC COM NEW Put 234,200 -8.52 19,935 9.70 n/a n/a n/a
2025-08-14 2025-06-30 13F CITIGROUPINC COM NEW Put 234,200 19,935 n/a n/a n/a
2025-05-14 2025-03-31 13F CITIGROUP COM NEW Put 256,000 -26.16 18,173 -25.53 n/a n/a n/a
2025-02-13 2024-12-31 13F CITIGROUP COM NEW Put 346,700 24,404 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.