Core Scientific Inc (CORZ) 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 14, 2026.
Get alerted when insiders buy the stocks you own
Add your holdings — no brokerage login — and Insider Radar sends a Telegram alert when an open-market Form 4 buy of $100,000 or more is filed on a stock you hold or watch.
Free for everyone right now · no card · nothing to buy
- Filings shown
- 22
- Open-market buys
- 3
- Open-market sells
- 20
Counts cover the 22 most recent Form 4 filings Tradune holds for CORZ (filed Jul 15 – Oct 14, 2026); the score below covers only the trailing 90 days (3 buys, 17 sells). No completed check of CORZ's Form 4 list on SEC EDGAR is on record yet; the latest CORZ filing Tradune holds was filed Oct 14, 2026. This is not guaranteed to be the complete record — see CORZ'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 CORZ filed Jul 22 – Oct 14, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
18 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 6 sales· 60,000 sh
- checkbox disclosed
- On filings with the box not checked
- 0 sales· 0 sh
- not proof that no plan exists
- Not comparable
- 12 sales· 70,000 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 |
|---|---|---|---|---|---|
| Todd M. DucheneOfficer (see filing) | 0 | 18 | — | 130,000 | −$2,415,998 |
| Eric Stanton WeissDirector | 2 | 0 | 13,000 | — | +$232,338 |
| Elizabeth CrainDirector | 1 | 0 | 6,000 | — | +$109,994 |
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
CORZ appeared in 6 archived weekly editions as a multi-insider cluster, a top net buyer, or both. These are frozen weekly snapshots, not a complete filing history.
- Week of Oct 7, 2026 2 insiders buying · -$1,983,925 net
- Week of Sep 16, 2026 2 insiders buying · -$1,559,211 net
- Week of Sep 9, 2026 2 insiders buying · -$1,372,476 net
- Week of Sep 7, 2026 2 insiders buying · -$1,372,476 net
- Week of Sep 4, 2026 2 insiders buying · -$1,372,476 net
- Week of Aug 25, 2026 2 insiders buying · -$1,035,643 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 CORZ
Insiders reported 3 open-market purchases of CORZ between Jul 15, 2026 and Oct 14, 2026, across 2 distinct buyers. The most recent purchase was reported by Eric Stanton Weiss (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 |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 10,000 | $15.12 | 1,159,668 | −0.9% | Oct 12, 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 |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 10,000 | $16.31 | 1,169,668 | −0.8% | Oct 5, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 23,508 | $15.98 | 4,412,918 | −0.5% | Oct 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 8,228 | $15.98 | 1,179,668 | −0.7% | Oct 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 10,000 | $16.76 | 1,187,896 | −0.8% | Sep 28, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 10,000 | $18.37 | 1,197,896 | −0.8% | Sep 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 6,000 | $16.33 | 265,262 | +2.3% | Sep 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 10,000 | $17.14 | 1,207,896 | −0.8% | Sep 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Gift Tranche 1 Warrants | 95,000 | — | — | — | Sep 9, 2026 |
| Open-market sale 10b5-1 box checked | 10,000 | $18.67 | 1,217,896 | −0.8% | Sep 8, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 10,000 | $16.23 | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 10,000 | $17.45 | — | — | Aug 24, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase | 6,000 | $18.33 | — | — | Aug 20, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase | 7,000 | $19.19 | — | — | Aug 18, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 11,205 | $20.13 | — | — | Aug 17, 2026 |
| Open-market sale | 10,000 | $20.10 | — | — | Aug 17, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 9,000 | $19.90 | — | — | Aug 10, 2026 |
| Open-market sale | 1,000 | $20.65 | — | — | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 1,000 | $20.39 | — | — | Aug 3, 2026 |
| Open-market sale | 1,500 | $21.55 | — | — | Aug 3, 2026 |
| Open-market sale | 7,500 | $22.62 | — | — | Aug 3, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 27,594 | — | — | — | Jul 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 100 | $22.49 | — | — | Jul 27, 2026 |
| Open-market sale | 1,600 | $21.89 | — | — | Jul 27, 2026 |
| Open-market sale | 8,300 | $20.75 | — | — | Jul 27, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 10,000 | $22.30 | — | — | Jul 20, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 15,584 | $22.72 | — | — | Jul 16, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Tax withholding | 4,325 | $22.72 | — | — | Jul 16, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 300 | $23.01 | — | — | Jul 13, 2026 |
| Open-market sale | 9,700 | $22.43 | — | — | Jul 13, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to CORZ's (Oct 14, 2026).
Frequently asked about CORZ insider activity
How many insiders bought CORZ stock in these Form 4 filings?
2 distinct insiders at Core Scientific Inc reported 3 open-market purchases (Form 4 code P) of CORZ shares between Jul 15, 2026 and Oct 14, 2026, the most recent filed by Eric Stanton Weiss (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 CORZ?
The most recent Form 4 on this page was filed by Todd M. Duchene (Officer (see filing)) on Oct 14, 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 CORZ insider sale shown?
The largest open-market sale among the filings shown was 10,000 CORZ shares at $22.30 (about $222,995) by Todd M. Duchene (Officer (see filing)) on Jul 20, 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.
Get insider alerts for CORZ — and your whole portfolio
Tradune watches SEC Form 4 filings and flags insider-cluster buying across everything you hold, routed to you automatically. Free for everyone right now · no card · nothing to buy
Track CORZ 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.