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Mark Chalmers

CEO
Chief Executive Officer
Energy Fuels Inc
Insider activity · 24 months0 buys1 saleCumulative net flow
Total declarations
36
Company
1
▲ Purchases (6 ops.)
€152k
▼ Sales (1 ops.)
€2.0M

Latest filing published 29 Jan 2026 for Energy Fuels INC, €1.2M.

Filing timeline

BuySale
Mark Chalmers

Insider track record

Disclosed buys
6
Disclosed sells
1
Signal history

Closed purchases

Market purchases
6
Positive at T+90
67%
Median T+90
+25.3%

Based on 6 purchases whose 90-day window has closed (published at least 91 days ago), the same population our ranking model reads.

Purchases by company

Since each purchase

  • Filed 07 May 2024 · 915 days ago · €92k
    -18.2%
    Entry US$5.82 · Close at T+365 US$4.76
  • Filed 20 Dec 2021 · 1784 days ago · €3,884
    -20.3%
    Entry US$7.83 · Close at T+365 US$6.24
  • Filed 24 Feb 2020 · 2449 days ago · €19k
    +387.9%
    Entry US$1.16 · Close at T+365 US$5.66
  • Filed 08 Aug 2019 · 2649 days ago · €8,852
    +12.0%
    Entry US$1.58 · Close at T+365 US$1.77
  • Filed 31 Mar 2017 · 3509 days ago · €20k
    -17.6%
    Entry US$2.10 · Close at T+365 US$1.73

Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.

Mark Chalmers: trading record in brief

Mark Chalmers (chief executive) discloses dealings in Energy Fuels Inc to SEC (Form 4). The record holds 36 filings, for trades running from 1 July 2016 to 27 January 2026.

The open-market side counts 6 purchases for €152k alongside 1 sale for €2.0M. On balance, insiders were net sellers of €1.9M. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. Outside the open market, there are 26 share grants and 3 option exercises.

The median purchase comes to €14k. Of 6 purchases, 6 formed part of a group of insiders buying within 30 days of each other. Such overlaps are known as a cluster signal: distinct people reaching the same decision at about the same time. Ninety days after publication, 6 purchases show a median change of +25.3%, with the price up in 67% of them. This is a record of the past, not a forecast.

The record was last updated on 29 January 2026 with a share grant (€1.2M) in Energy Fuels Inc. The most recent open-market purchase was published on 7 May 2024, 915 days ago. The median gap between a trade and its publication by SEC (Form 4) is 2 days. Section 16 rules allow two business days to file each Form 4. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.

Companies and markets linked to Mark Chalmers

Open company profiles for insider transactions, fundamentals and analyst consensus when available.

Declarations36 total
  • ◆
    CEOExecutivesEnergy Fuels Inc
    1M USD23SEC
    59,407 shares@ US$24.167.9% of flowCommon SharesSEC:0000912282-26-000189:1
  • ◆
    CEOExecutivesEnergy Fuels Inc
    0SEC
    38,289 shares0Common SharesSEC:0000912282-26-000189:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    0SEC
    19,096 shares0Common SharesSEC:0000912282-25-001344:0
  • ▼
    CEOExecutivesEnergy Fuels Inc
    2M USD42SEC
    150,000 shares@ US$15.60319.3% of flowCommon SharesSEC:0001385849-25-000049:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    0SEC
    166,042 shares0Common SharesSEC:0000912282-25-000101:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    234,573 USD24SEC
    45,372 shares@ US$5.172.1% of flowCommon SharesSEC:0000912282-25-000073:0
  • ▲
    President & CEOExecutivesEnergy Fuels Inc
    98,671 USD40SEC
    16,838 shares@ US$5.860.9% of flowCommon SharesSEC:0001385849-24-000038:0
    Canonical exit: 5 Aug 2024 (T+90)
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    342,049 USD22SEC
    46,856 shares@ US$7.302.1% of flowCommon SharesSEC:0001385849-24-000009:1
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    0SEC
    88,260 shares0Common SharesSEC:0001385849-24-000009:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    581,795 USD22SEC
    70,350 shares@ US$8.273.5% of flowCommon SharesSEC:0001385849-23-000036:1
  • ◇
    President & CEOExecutivesEnergy Fuels Inc
    1M USD23SEC
    161,729 shares@ US$8.2711.8% of flowCommon SharesSEC:0001385849-23-000036:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    552,479 USD22SEC
    84,348 shares@ US$6.553.3% of flowCommon SharesSEC:0001385849-23-000017:1
  • ◇
    President & CEOExecutivesEnergy Fuels Inc
    355,998 USD22SEC
    54,938 shares@ US$6.482.1% of flowCommon SharesSEC:0001385849-23-000017:2
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    152,390 USD22SEC
    23,517 shares@ US$6.480.9% of flowCommon SharesSEC:0001385849-23-000017:3
  • ◇
    President & CEOExecutivesEnergy Fuels Inc
    1M USD23SEC
    193,969 shares@ US$6.5511.1% of flowCommon SharesSEC:0001385849-23-000017:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    351,914 USD22SEC
    46,673 shares@ US$7.542.1% of flowCommon SharesSEC:0001567619-23-001471:1
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    0SEC
    101,152 shares0Common SharesSEC:0001567619-23-001471:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    343,605 USD24SEC
    60,815 shares@ US$5.652.9% of flowCommon SharesSEC:0001385849-22-000015:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    593,998 USD25SEC
    91,808 shares@ US$6.475.0% of flowCommon SharesSEC:0001385849-22-000003:0
  • ▲
    President & CEOExecutivesEnergy Fuels Inc
    4,548 USD34SEC
    977 shares@ US$4.6550.0% of flowCommon SharesSEC:0001385849-21-000049:0
    Canonical exit: 15 Nov 2021 (T+90)
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    169,208 USD24SEC
    40,192 shares@ US$4.211.2% of flowCommon SharesSEC:0001385849-21-000018:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    509,998 USD24SEC
    131,105 shares@ US$3.893.5% of flowCommon SharesSEC:0001385849-21-000004:0
  • ▲
    President & CEOExecutivesEnergy Fuels Inc
    19,962 USD44SEC
    14,058 shares@ US$1.420.2% of flowCommon SharesSEC:0001385849-20-000028:0
    Canonical exit: 21 May 2020 (T+90)
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    113,680 USD26SEC
    70,173 shares@ US$1.620.9% of flowCommon SharesSEC:0001385849-20-000016:0
  • ◆
    President & CEOExecutivesEnergy Fuels Inc
    190,703 USD26SEC
    108,354 shares@ US$1.761.5% of flowCommon SharesSEC:0001385849-20-000013:0

25 of 36 declarations