SIMPLEX TRADING, LLC

Position in DNN — Denison Mines Corp.

CIK 1488542 CHICAGO, IL

Position in DNN

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$31,353

-$238,103 QoQ

Shares Held

8,882

-90.9% QoQ

Ownership

0.001%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2020

21 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Energy · as of Mar 31, 2026

SIMPLEX TRADING, LLC holds $11,709,661 across 3 Uranium names. DNN ranks #3 (0.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CCJ	Cameco Corp	55,851	$6,065,977
2	UUUU	Energy Fuels Inc	307,525	$5,612,331
3	DNN	Denison Mines Corp. This page	8,882	$31,353

21 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$31,353	8,882	-90.9%	Shares	Sole	2026-05-14
2025-09-30	$269,456	97,984	-4.9%	Shares	Sole	2025-11-12
2025-03-31	$133,914	103,011	-78.2%	Shares	Sole	2025-05-12
2024-12-31	$852,348	473,527	-21.0%	Shares	Sole	2025-02-11
2024-09-30	$1,096,667	599,272	+56.1%	Shares	Sole	2024-11-08
2024-06-30	$763,984	383,912	+135.0%	Shares	Sole	2024-07-25
2024-03-31	$318,538	163,353	+92.8%	Shares	Sole	2024-04-25
2023-12-31	$149,940	84,712	-73.0%	Shares	Sole	2024-02-02
2023-09-30	$516,888	313,266	+269.6%	Shares	Sole	2023-11-01
2023-06-30	$105,952	84,762	-18.4%	Shares	Sole	2023-08-04
2023-03-31	$113,247	103,897	-66.5%	Shares	Sole	2023-04-27
2022-12-31	$356,526	310,023	-16.8%	Shares	Sole	2023-02-02
2022-09-30	$443,351	372,564	+112.6%	Shares	Sole	2022-11-04
2022-06-30	$169,947	175,204	+35.6%	Shares	Sole	2022-08-03
2022-03-31	$206,761	129,226	+358.1%	Shares	Sole	2022-05-02
2021-12-31	$38,644	28,208	-91.0%	Shares	Sole	2022-02-23
2021-09-30	$462,210	314,429	0.0%	Shares	Sole	2021-10-28
2021-06-30	$374,170	314,429	-2.7%	Shares	Sole	2021-08-12
2021-03-31	$352,332	323,241	+80710.2%	Shares	Sole	2021-04-26
2020-09-30	$164	400	0.0%	Shares	Sole	2020-10-14
2020-06-30	$136	400	—	Shares	Sole	2020-07-13
No filing history on record for this holder in this stock.