Cameco Corporation
US ˙ NYSE ˙ US13321L1085

SecurityCCJ / Cameco Corporation
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership684,567 shares
Latest Disclosed Value $ 74,350,822
Renaissance Technologies Llc reports 211.59% increase in ownership of CCJ / Cameco Corporation

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 684,567 shares of Cameco Corporation (US:CCJ) valued at $74,350,822 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 219,700 shares of Cameco Corporation. This represents a change in shares of 211.59% during the quarter. The current value of the position is $70,811,610 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)
2026-05-14 2026-03-31 13F CAMECO COM 13321L108 684,567 464,867 211.59 74,351 269.90 0.1163
2026-02-12 2025-12-31 13F CAMECO COM 13321L108 219,700 -16,789 -7.10 20,100 1.36 0.0312
2025-11-13 2025-09-30 13F CAMECO COM 13321L108 236,489 -104,711 -30.69 19,832 -21.70 0.0262
2025-08-13 2025-06-30 13F CAMECO COM 13321L108 341,200 -173,100 -33.66 25,327 19.65 0.0337
2025-05-14 2025-03-31 13F CAMECO COM 13321L108 514,300 482,000 1,492.26 21,169 1,175.95 0.0320
2025-02-13 2024-12-31 13F CAMECO COM 13321L108 32,300 32,300 1,660 0.0025
2024-08-09 2024-06-30 13F CAMECO COM 13321L108 0 -68,200 -100.00 0 -100.00
2024-05-13 2024-03-31 13F CAMECO COM 13321L108 68,200 -376,900 -84.68 3 -89.47 0.0046
2024-02-13 2023-12-31 13F CAMECO COM 13321L108 445,100 93,700 26.66 19 46.15 0.0297
2023-11-14 2023-09-30 13F CAMECO COM 13321L108 351,400 -971,500 -73.44 14 -68.29 0.0237
2023-08-11 2023-06-30 13F CAMECO COM 13321L108 1,322,900 -815,100 -38.12 41 -25.45 0.0597
2023-05-12 2023-03-31 13F CAMECO COM 13321L108 2,138,000 850,100 66.01 56 89.66 0.0742
2023-02-13 2022-12-31 13F CAMECO COM 13321L108 1,287,900 1,273,500 8,843.75 29 -92.41 0.0399
2022-11-14 2022-09-30 13F CAMECO COM 13321L108 14,400 -73,500 -83.62 382 -79.33 0.0005
2022-08-12 2022-06-30 13F CAMECO COM 13321L108 87,900 -254,500 -74.33 1,848 -81.47 0.0022
2022-05-13 2022-03-31 13F CAMECO COM 13321L108 342,400 -1,323,300 -79.44 9,973 -72.55 0.0117
2022-02-11 2021-12-31 13F CAMECO COM 13321L108 1,665,700 1,330,602 397.08 36,327 398.79 0.0452
2021-11-12 2021-09-30 13F CAMECO COM 13321L108 335,098 335,098 7,283 0.0094
2021-05-13 2021-03-31 13F CAMECO COM 13321L108 0 -2,915,590 -100.00 0 -100.00
2021-02-10 2020-12-31 13F CAMECO COM 13321L108 2,915,590 -601,710 -17.11 39,069 9.98 0.0424
2020-11-13 2020-09-30 13F CAMECO COM 13321L108 3,517,300 -1,676,900 -32.28 35,525 -33.27 0.0355
2020-08-13 2020-06-30 13F CAMECO COM 13321L108 5,194,200 4,772,600 1,132.02 53,235 1,552.75 0.0460
2020-05-14 2020-03-31 13F CAMECO COM 13321L108 421,600 -119,900 -22.14 3,221 -33.10 0.0031
2020-02-13 2019-12-31 13F CAMECO COM 13321L108 541,500 529,300 4,338.52 4,815 4,050.86 0.0037
2019-11-13 2019-09-30 13F CAMECO COM 13321L108 12,200 -953,200 -98.74 116 -98.88 0.0001
2019-08-12 2019-06-30 13F CAMECO COM 13321L108 965,400 822,600 576.05 10,359 515.14 0.0091
2019-05-14 2019-03-31 13F CAMECO COM 13321L108 142,800 -217,200 -60.33 1,684 -58.83 0.0015
2019-02-12 2018-12-31 13F CAMECO COM 13321L108 360,000 70,500 24.35 4,090 23.94 0.0045
2018-11-13 2018-09-30 13F CAMECO COM 13321L108 289,500 -134,700 -31.75 3,300 -30.85 0.0034
2018-08-13 2018-06-30 13F/A-1 CAMECO COM 13321L108 424,200 241,080 131.65 4,772 186.61 0.0052
2018-08-13 2018-06-30 13F CAMECO COM 13321L108 183,120 1,665
2018-05-14 2018-03-31 13F CAMECO COM 13321L108 183,120 -1,546,484 -89.41 1,665 -89.58 0.0018
2018-02-13 2017-12-31 13F CAMECO COM 13321L108 1,729,604 1,003,804 138.30 15,976 127.64 0.0176
2017-11-13 2017-09-30 13F CAMECO COM 13321L108 725,800 725,800 -58.04 7,018 -56.07 0.0083
2017-05-12 2017-03-31 13F CAMECO COM 13321L108 0 -388,500 -100.00 0 -100.00
2017-02-13 2016-12-31 13F CAMECO COM 13321L108 388,500 -1,055,000 -73.09 4,068 -67.06 0.0064
2016-11-14 2016-09-30 13F CAMECO COM 13321L108 1,443,500 1,085,000 302.65 12,350 214.01 0.0218
2016-08-12 2016-06-30 13F CAMECO COM 13321L108 358,500 23,600 7.05 3,933 -8.56 0.0075
2016-05-13 2016-03-31 13F CAMECO COM 13321L108 334,900 92,600 38.22 4,301 43.80 0.0082
2016-02-11 2015-12-31 13F CAMECO COM 13321L108 242,300 242,300 -27.65 2,991 -30.46 0.0065
2015-11-12 2015-09-30 13F CAMECO COM 13321L108 0 -314,400 -100.00 0 -100.00
2015-08-14 2015-06-30 13F CAMECO COM 13321L108 314,400 205,800 189.50 4,490 196.76 0.0102
2015-05-13 2015-03-31 13F CAMECO COM 13321L108 108,600 -71,900 -39.83 1,513 -48.89 0.0032
2015-02-13 2014-12-31 13F CAMECO COM 13321L108 180,500 18,300 11.28 2,960 -12.01 0.0071
2014-02-14 2013-12-31 13F CAMECO COM 13321L108 162,200 -1,600 -0.98 3,364 13.88 0.0081
2013-11-13 2013-09-30 13F CAMECO COM 13321L108 163,800 163,800 2,954 0.0072
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.