Cleanspark Inc (CLSK) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 1, 2026.
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- Filings shown
- 19
- Open-market buys
- 0
- Open-market sells
- 5
Counts cover the 19 most recent Form 4 filings Tradune holds for CLSK (filed Aug 14 – Oct 1, 2026). No completed check of CLSK's Form 4 list on SEC EDGAR is on record yet; the latest CLSK filing Tradune holds was filed Oct 1, 2026. This is not guaranteed to be the complete record — see CLSK's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 19 filings Tradune holds for CLSK filed Aug 14 – Oct 1, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
5 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 5 sales· 33,151 sh
- checkbox disclosed
- On filings with the box not checked
- 0 sales· 0 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Taylor MonnigCTO, COO | 0 | 5 | — | 33,151 | −$435,395 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at CLSK
No open-market insider purchases (Form 4 code P) were reported for CLSK in the trailing 90 days. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 3,335 | $12.33 | 336,810 | −1.0% | Oct 1, 2026 |
| Tax withholding | 13,123 | $12.33 | 340,145 | −3.7% | Oct 1, 2026 |
| Option exercise Restricted Stock Units | 33,350 | — | — | — | Sep 30, 2026 |
| Option exercise | 33,350 | — | 353,268 | +10% | Sep 30, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 14,854 | $12.33 | 385,946 | −3.7% | Oct 1, 2026 |
| Option exercise Restricted Stock Units | 33,500 | — | — | — | Sep 30, 2026 |
| Option exercise | 33,350 | — | 400,800 | +9.1% | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Restricted Stock Units | 7,805 | — | — | — | Sep 30, 2026 |
| Option exercise | 7,805 | — | 137,605 | +6.0% | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 7,805 | — | 155,827 | +5.3% | Sep 30, 2026 |
| Option exercise Restricted Stock Units | 7,805 | — | — | — | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Restricted Stock Units | 7,805 | — | — | — | Sep 30, 2026 |
| Option exercise | 7,805 | — | 319,083 | +2.5% | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 7,805 | — | 71,737 | +12% | Sep 30, 2026 |
| Option exercise Restricted Stock Units | 7,805 | — | — | — | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 7,805 | — | 129,800 | +6.4% | Jun 30, 2026 |
| Option exercise Restricted Stock Units | 7,805 | — | — | — | Jun 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Restricted Stock Units | 7,805 | — | — | — | Jun 30, 2026 |
| Option exercise | 7,805 | — | 148,022 | +5.6% | Jun 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Restricted Stock Units | 7,805 | — | — | — | Jun 30, 2026 |
| Option exercise | 7,805 | — | 63,932 | +14% | Jun 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Restricted Stock Units | 7,805 | — | — | — | Jun 30, 2026 |
| Option exercise | 7,805 | — | 311,278 | +2.6% | Jun 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 17,183 | $13.34 | 140,511 | −11% | Sep 8, 2026 |
| Tax withholding | 36,836 | $13.34 | 104,097 | −26% | Sep 8, 2026 |
| Option exercise | 93,612 | — | 140,933 | +198% | Sep 4, 2026 |
| Option exercise | 16,375 | — | 120,472 | +16% | Sep 4, 2026 |
| Tax withholding | 6,444 | $12.61 | 114,028 | −5.3% | Sep 4, 2026 |
| Option exercise | 43,666 | — | 157,694 | +38% | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 93,612 | — | — | — | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 16,375 | — | — | — | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 43,666 | — | — | — | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 52,004 | $13.34 | 249,330 | −17% | Sep 8, 2026 |
| Open-market sale 10b5-1 box checked | 13,216 | $13.34 | 236,114 | −5.3% | Sep 8, 2026 |
| Open-market sale 10b5-1 box checked | 12,033 | $13.34 | 319,918 | −3.6% | Sep 8, 2026 |
| Tax withholding | 47,351 | $13.34 | 331,951 | −12% | Sep 8, 2026 |
| Option exercise | 132,158 | — | 301,334 | +78% | Sep 4, 2026 |
| Option exercise | 45,125 | — | 281,239 | +19% | Sep 4, 2026 |
| Tax withholding | 17,757 | $12.61 | 263,482 | −6.3% | Sep 4, 2026 |
| Open-market sale 10b5-1 box checked | 4,513 | $12.61 | 258,969 | −1.7% | Sep 4, 2026 |
| Option exercise | 120,333 | — | 379,302 | −24% | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 132,158 | — | — | — | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 45,125 | — | — | — | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 120,333 | — | — | — | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 53,596 | $13.34 | 367,450 | −13% | Sep 8, 2026 |
| Tax withholding | 58,863 | $13.34 | 275,687 | −18% | Sep 8, 2026 |
| Option exercise | 132,158 | — | 334,550 | +65% | Sep 4, 2026 |
| Option exercise | 45,125 | — | 320,812 | +16% | Sep 4, 2026 |
| Tax withholding | 20,999 | $12.61 | 300,713 | −6.5% | Sep 4, 2026 |
| Option exercise | 120,333 | — | 421,046 | +40% | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 132,158 | — | — | — | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 120,333 | — | — | — | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 45,125 | — | — | — | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 73,060 | $13.34 | 305,786 | −19% | Sep 8, 2026 |
| Tax withholding | 56,338 | $13.34 | 150,952 | −27% | Sep 8, 2026 |
| Option exercise Restricted Stock Units | 69,625 | — | — | — | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 185,666 | — | — | — | Sep 4, 2026 |
| Option exercise | 185,666 | — | 378,846 | +96% | Sep 4, 2026 |
| Option exercise | 143,171 | — | 207,290 | +223% | Sep 4, 2026 |
| Option exercise | 69,625 | — | 220,577 | +46% | Sep 4, 2026 |
| Tax withholding | 27,397 | $12.61 | 193,180 | −12% | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 143,171 | — | — | — | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 253,587 | $13.34 | 3,039,089 | −7.7% | Sep 8, 2026 |
| Tax withholding | 92,070 | $13.34 | 2,595,313 | −3.4% | Sep 8, 2026 |
| Option exercise | 209,042 | — | 2,687,383 | +8.4% | Sep 4, 2026 |
| Option exercise | 216,125 | — | 2,811,438 | +8.3% | Sep 4, 2026 |
| Tax withholding | 95,095 | $12.61 | 2,716,343 | −3.4% | Sep 4, 2026 |
| Option exercise | 576,333 | — | 3,292,676 | +21% | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 209,042 | — | — | — | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 216,125 | — | — | — | Sep 4, 2026 |
| Option exercise Restricted Stock Units | 576,333 | — | — | — | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 54 | $11.51 | 169,176 | −0.0% | Aug 14, 2026 |
| Tax withholding | 211 | $11.51 | 169,230 | −0.1% | Aug 14, 2026 |
| Option exercise Restricted Stock Units | 536 | — | — | — | Aug 13, 2026 |
| Option exercise | 536 | — | 169,441 | +0.3% | Aug 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 1,192 | $11.51 | 202,392 | −0.6% | Aug 14, 2026 |
| Option exercise | 2,676 | — | 203,584 | +1.3% | Aug 13, 2026 |
| Option exercise Restricted Stock Units | 2,676 | — | — | — | Aug 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 632 | $11.51 | 64,119 | −1.0% | Aug 14, 2026 |
| Option exercise | 1,606 | — | 64,751 | +2.5% | Aug 13, 2026 |
| Option exercise Restricted Stock Units | 1,606 | — | — | — | Aug 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 9,031 | $11.51 | 2,478,132 | −0.4% | Aug 14, 2026 |
| Option exercise | 20,524 | — | 2,487,163 | +0.8% | Aug 13, 2026 |
| Option exercise Restricted Stock Units | 20,524 | — | — | — | Aug 13, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to CLSK's (Oct 1, 2026).
Frequently asked about CLSK insider activity
How many insiders bought CLSK stock in the last 90 days?
No open-market purchases (Form 4 code P) of CLSK shares were reported by Cleanspark Inc insiders in the trailing 90 days. The 19 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for CLSK?
The most recent Form 4 on this page was filed by Thomas Leigh Wood (Director) on Oct 1, 2026, reporting 2 transactions. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market CLSK insider sale shown?
The largest open-market sale among the filings shown was 13,216 CLSK shares at $13.34 (about $176,263) by Taylor Monnig (CTO, COO) on Sep 8, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track CLSK insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.