Terawulf Inc (WULF) 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 2, 2026.
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- Filings shown
- 14
- Open-market buys
- 3
- Open-market sells
- 3
Counts cover the 14 most recent Form 4 filings Tradune holds for WULF (filed Aug 3 – Oct 2, 2026). No completed check of WULF's Form 4 list on SEC EDGAR is on record yet; the latest WULF filing Tradune holds was filed Oct 2, 2026. This is not guaranteed to be the complete record — see WULF'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 14 filings Tradune holds for WULF filed Aug 3 – Oct 2, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
3 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 0 sales· 0 sh
- checkbox disclosed
- On filings with the box not checked
- 1 sale· 56,023 sh
- not proof that no plan exists
- Not comparable
- 2 sales· 268,126 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 |
|---|---|---|---|---|---|
| Michael C. BucellaDirector | 3 | 0 | 11,968 | — | +$189,916 |
| Paul B. PragerDirector & Officer | 0 | 1 | — | 137,500 | −$2,345,654 |
| Walter E. CarterDirector | 0 | 1 | — | 130,626 | −$1,977,808 |
| Catherine J. MotzDirector | 0 | 1 | — | 56,023 | −$997,943 |
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 →
Weekly signal history
WULF appeared in 1 archived weekly edition as a top net buyer. These are frozen weekly snapshots, not a complete filing history.
- Week of Aug 19, 2026 2 open-market buys · $99,950 net
An entry means this company met that edition’s displayed cluster or top-buyer threshold. Missing weeks do not mean no insider transaction occurred. All figures are derived from SEC Form 4 filings; open-market buys minus sales are shown as net only when every transaction value was disclosed.
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 WULF
Insiders reported 3 open-market purchases of WULF in the trailing 90 days, across 1 distinct buyer. The most recent purchase was reported by Michael C. Bucella (Director) on Sep 15, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 1,690 | — | 313,200 | +0.5% | 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.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 2,112 | — | 231,202 | +0.9% | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 1,690 | — | 352,479 | +0.5% | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 666,667 | — | 667,167 | +133,333% | Sep 29, 2026 |
| Option exercise Restricted Stock Units | 666,667 | — | — | — | Sep 29, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition Forward sale contract (obligation to sell) | 3,000,000 | — | — | — | Sep 22, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 6,085 | $14.79 | 350,789 | +1.8% | Sep 15, 2026 |
“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 |
|---|---|---|---|---|---|
| Other acquisition / disposition Forward sale contract (obligation to sell) | 350,000 | — | — | — | Sep 10, 2026 |
| Other acquisition / disposition Forward sale contract (obligation to sell) | 350,000 | — | — | — | Sep 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 56,023 | $17.81 | 153,218 | −27% | Sep 8, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 130,626 | $15.14 | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 137,500 | $17.06 | — | — | Aug 27, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase | 2,860 | $17.47 | — | — | Aug 17, 2026 |
| Open-market purchase | 3,023 | $16.54 | — | — | Aug 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 6,666 | — | — | — | Aug 16, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Disposition to issuer | 276,500 | — | — | — | Aug 3, 2026 |
| Option exercise | 500,000 | — | — | — | Aug 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 500,000 | — | — | — | Aug 1, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to WULF's (Oct 2, 2026).
Frequently asked about WULF insider activity
How many insiders bought WULF stock in the last 90 days?
1 distinct insider at Terawulf Inc reported 3 open-market purchases (Form 4 code P) of WULF shares in the trailing 90 days, the most recent filed by Michael C. Bucella (Director) on Sep 15, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Who filed the most recent Form 4 for WULF?
The most recent Form 4 on this page was filed by Michael C. Bucella (Director) on Oct 2, 2026, reporting 1 transaction. 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 WULF insider sale shown?
The largest open-market sale among the filings shown was 137,500 WULF shares at $17.06 (about $2,345,654) by Paul B. Prager (Director & Officer) on Aug 27, 2026. Value is shares × the price reported on the Form 4; trades may be made under a prearranged Rule 10b5-1 plan.
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 WULF 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.