Denison Mines Corp.
US ˙ NYSEAM ˙ CA2483561072

SecurityDNN / Denison Mines Corp.
InstitutionCitigroup Inc
Latest Disclosed Ownership710,301 shares
Latest Disclosed Value $ 2,509,250
Citigroup Inc reports 2.52% decrease in ownership of DNN / Denison Mines Corp.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 710,301 shares of Denison Mines Corp. (US:DNN) valued at $2,507,363 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 728,665 shares of Denison Mines Corp.. This represents a change in shares of -2.52% during the quarter. The current value of the position is $2,422,126 USD.

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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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 DENISON MINES COM 248356107 710,301 -18,364 -2.52 2,509 29.73 0.0005
2026-02-13 2025-12-31 13F DENISON MINES COM 248356107 728,665 136,641 23.08 1,935 18.72 0.0009
2025-11-10 2025-09-30 13F DENISON MINES COM 248356107 592,024 373,707 171.18 1,630 309.30 0.0007
2025-08-11 2025-06-30 13F DENISON MINES COM 248356107 218,317 105,883 94.17 398 172.60 0.0002
2025-05-12 2025-03-31 13F DENISON MINES COM 248356107 112,434 -125,279 -52.70 147 -66.13 0.0001
2025-02-12 2024-12-31 13F DENISON MINES COM 248356107 237,713 36,352 18.05 431 17.76 0.0003
2024-11-12 2024-09-30 13F DENISON MINES COM 248356107 201,361 0 0.00 367 -9.18 0.0002
2024-08-12 2024-06-30 13F DENISON MINES COM 248356107 201,361 -31,462 -13.51 403 -11.43 0.0003
2024-05-10 2024-03-31 13F DENISON MINES COM 248356107 232,823 17,735 8.25 456 20.37 0.0003
2024-02-09 2023-12-31 13F DENISON MINES COM 248356107 215,088 3,394 1.60 378 8.31 0.0003
2023-12-06 2023-09-30 13F/A-1 DENISON MINES COM 248356107 211,694 2,491 1.19 349 33.21 0.0003
2023-11-09 2023-09-30 13F DENISON MINES COM 248356107 211,694 2,491 349 0.0001
2023-08-10 2023-06-30 13F DENISON MINES COM 248356107 209,203 1,316 0.63 262 16.44 0.0002
2023-05-11 2023-03-31 13F DENISON MINES COM 248356107 207,887 1,846 0.90 226 -4.26 0.0002
2023-02-09 2022-12-31 13F DENISON MINES COM 248356107 206,041 6,164 3.08 236 0.43 0.0002
2022-11-10 2022-09-30 13F DENISON MINES COM 248356107 199,877 -70,060 -25.95 234 -12.03 0.0002
2022-08-10 2022-06-30 13F DENISON MINES COM 248356107 269,937 42,849 18.87 266 -28.30 0.0002
2022-05-12 2022-03-31 13F DENISON MINES COM 248356107 227,088 27,211 13.61 371 34.91 0.0002
2022-02-10 2021-12-31 13F DENISON MINES COM 248356107 199,877 0 0.00 275 -5.17 0.0001
2021-11-10 2021-09-30 13F DENISON MINES COM 248356107 199,877 0 0.00 290 18.85 0.0002
2021-08-10 2021-06-30 13F DENISON MINES COM 248356107 199,877 0 0.00 244 11.93 0.0001
2021-05-13 2021-03-31 13F DENISON MINES COM 248356107 199,877 199,865 1,665,541.67 218 0.0001
2021-02-11 2020-12-31 13F DENISON MINES COM 248356107 12 0 0.00 0 0.0000
2020-11-12 2020-09-30 13F DENISON MINES COM 248356107 12 0 0.00 0 0.0000
2020-08-12 2020-06-30 13F DENISON MINES COM 248356107 12 0 0.00 0 0.0000
2020-05-12 2020-03-31 13F DENISON MINES COM 248356107 12 0 0.00 0 0.0000
2020-02-12 2019-12-31 13F DENISON MINES COM 248356107 12 -800 -98.52 0 0.0000
2019-11-08 2019-09-30 13F DENISON MINES COM 248356107 812 0 0.00 0 0.0000
2019-08-12 2019-06-30 13F DENISON MINES COM 248356107 812 -300,500 -99.73 0 -100.00
2019-05-13 2019-03-31 13F DENISON MINES COM 248356107 301,312 0 0.00 153 10.07 0.0001
2019-02-12 2018-12-31 13F DENISON MINES COM 248356107 301,312 0 0.00 139 -30.15 0.0001
2018-11-13 2018-09-30 13F DENISON MINES COM 248356107 301,312 0 0.00 199 36.30 0.0002
2018-08-10 2018-06-30 13F DENISON MINES COM 248356107 301,312 0 0.00 146 8.15 0.0001
2018-05-11 2018-03-31 13F DENISON MINES COM 248356107 301,312 0 0.00 135 -18.18 0.0001
2018-02-12 2017-12-31 13F DENISON MINES COM 248356107 301,312 -1,341 -0.44 165 17.86 0.0001
2017-11-13 2017-09-30 13F DENISON MINES COM 248356107 302,653 300,379 13,209.28 140 13,900.00 0.0001
2017-08-11 2017-06-30 13F DENISON MINES COM 248356107 2,274 -9,957 -81.41 1 -85.71 0.0000
2017-05-12 2017-03-31 13F DENISON MINES COM 248356107 12,231 8,425 221.36 7 250.00 0.0000
2017-02-10 2016-12-31 13F DENISON MINES COM 248356107 3,806 1 0.03 2 100.00 0.0000
2016-11-10 2016-09-30 13F DENISON MINES COM 248356107 3,805 -59 -1.53 1 -50.00 0.0000
2016-08-12 2016-06-30 13F DENISON MINES COM 248356107 3,864 3,052 375.86 2 0.0000
2016-05-13 2016-03-31 13F DENISON MINES COM 248356107 812 -331 -28.96 0 0.0000
2016-02-12 2015-12-31 13F DENISON MINES COM 248356107 1,143 -9,669 -89.43 0 -100.00
2015-11-13 2015-09-30 13F DENISON MINES COM 248356107 10,812 0 0.00 4 -50.00 0.0000
2015-08-13 2015-06-30 13F DENISON MINES COM 248356107 10,812 -16,997 -61.12 8 -63.64 0.0000
2015-05-14 2015-03-31 13F DENISON MINES COM 248356107 27,809 12,043 76.39 22 37.50 0.0000
2015-02-17 2014-12-31 13F DENISON MINES COM 248356107 15,766 -351,614 -95.71 16 -96.20 0.0000
2014-11-14 2014-09-30 13F DENISON MINES COM 248356107 367,380 170,848 86.93 421 69.08 0.0004
2014-08-14 2014-06-30 13F DENISON MINES COM 248356107 196,532 183,670 1,428.00 249 1,210.53 0.0002
2014-05-15 2014-03-31 13F DENISON MINES COM 248356107 12,862 -19,333 -60.05 19 -51.28 0.0000
2014-02-14 2013-12-31 13F DENISON MINES COM 248356107 32,195 19,293 149.53 39 178.57 0.0000
2013-11-14 2013-09-30 13F DENISON MINES COM 248356107 12,902 9,000 230.65 14 250.00 0.0000
2013-08-14 2013-06-30 13F DENISON MINES COM 248356107 3,902 3,902 4 0.0000
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.