Core Scientific legal chief sells 10,000 shares

The report distinguishes tax withholding at restricted stock unit vesting from the separate sale under a Rule 10b5-1 plan.

Rhea-AI Filing Summary

Core Scientific, Inc. Chief Legal and Administrative Officer Todd M. Duchene sold 10,000 shares on October 19, 2026, at a weighted average price of $13.8744 per share under a Rule 10b5-1 trading plan adopted December 5, 2025; transaction prices ranged from $13.62 to $14.14, inclusive.

On October 16, 2026, 6,382 shares were withheld to satisfy tax obligations upon vesting of previously granted restricted stock units, not as an open-market sale. Duchene also reported 700,000 shares held indirectly by a grantor retained annuity trust of which he is sole trustee.

Insider Trade Summary 10b5-1

Net Seller: 10,000 shares

Net Sell 3 txns

Insider DUCHENE TODD M

Role See remarks

Sold 10,000 shs ($139K)

Type	Security	Shares	Price	Value
Sale	Common Stock F2, F3	10,000	$13.8744	$139K
Tax Withholding	Common Stock F1	6,382	$14.455	$92K
holding	Common Stock F4	--	--	--

Holdings After Transaction: Common Stock — 1,143,286 shares (Direct); Common Stock — 700,000 shares (Indirect, By GRAT)

Footnotes (4)

1. F1. This Form 4 reports the withholding of shares to satisfy withholding tax obligations upon the vesting of restricted stock units which were previously granted and reported. The change in share ownership of the Reporting Person reported in this Form 4 results from the difference between (i) the number of restricted stock units subject to vesting that were previously granted and reported and (ii) the net number of shares actually received upon vesting of such restricted stock units after the withholding of shares to satisfy withholding tax obligations. This does not reflect an open market sale of securities.
2. F2. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 5, 2025.
3. F3. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.62 to $14.14, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range.
4. F4. Represents shares held by a grantor retained annuity trust of which the Reporting Person is the sole trustee.

Key Figures

Shares sold: 10,000 shares Weighted average sale price: $13.8744 per share Sale price range: $13.62 to $14.14 per share +2 more

5 metrics

Shares sold 10,000 shares Sale on October 19, 2026

Weighted average sale price $13.8744 per share Sale on October 19, 2026

Sale price range $13.62 to $14.14 per share Prices for the October 19, 2026 sale; inclusive

Tax-withholding shares 6,382 shares Withheld for taxes upon restricted stock unit vesting on October 16, 2026

Shares held indirectly by GRAT 700,000 shares As of October 16, 2026; Duchene is the sole trustee

Key Terms

Rule 10b5-1 trading plan, weighted average price, restricted stock units, grantor retained annuity trust

4 terms

Rule 10b5-1 trading plan financial

"effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

restricted stock units financial

"upon the vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

grantor retained annuity trust financial

"shares held by a grantor retained annuity trust"

A grantor retained annuity trust (GRAT) is an estate-planning tool where the person who creates the trust transfers assets into it but receives fixed cash payments (an annuity) from the trust for a set number of years; whatever remains after that term passes to designated beneficiaries. It matters to investors because it can shift future appreciation of assets out of the creator’s taxable estate—like putting an asset into a timed vending machine that pays you fixed amounts while any extra value that grows inside the machine goes to heirs with reduced gift or estate tax consequences.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many CORZ shares did Todd M. Duchene sell and at what price?

Todd M. Duchene sold 10,000 shares on October 19, 2026, at a weighted average price of $13.8744 per share. The shares were sold in multiple transactions at prices ranging from $13.62 to $14.14, inclusive, under a Rule 10b5-1 plan adopted December 5, 2025.

Why did Todd M. Duchene's CORZ share ownership change on October 16, 2026?

The change reflected the difference between restricted stock units previously granted and reported that were subject to vesting and the net shares received after 6,382 shares were withheld to satisfy withholding tax obligations.

How many CORZ shares did Todd M. Duchene hold through a GRAT?

Duchene reported 700,000 shares held indirectly by a grantor retained annuity trust as of October 16, 2026. He is the trust's sole trustee.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/20/2026 - 04:06 PM EDT Accepted by SEC EDGAR 10/20/2026 - 04:05 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

DUCHENE TODD M

(Last) (First) (Middle)

C/O CORE SCIENTIFIC, INC.

838 WALKER ROAD, SUITE 21-2105

(Street)

DOVER DELAWARE 19904

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Core Scientific, Inc./tx [ CORZ ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See remarks

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/16/2026		F(1)		6,382	D	$14.455	1,153,286	D
Common Stock	10/19/2026		S(2)		10,000	D	$13.8744(3)	1,143,286	D
Common Stock								700,000	I	By GRAT(4)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This Form 4 reports the withholding of shares to satisfy withholding tax obligations upon the vesting of restricted stock units which were previously granted and reported. The change in share ownership of the Reporting Person reported in this Form 4 results from the difference between (i) the number of restricted stock units subject to vesting that were previously granted and reported and (ii) the net number of shares actually received upon vesting of such restricted stock units after the withholding of shares to satisfy withholding tax obligations. This does not reflect an open market sale of securities.

2. The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 5, 2025.

3. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.62 to $14.14, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range.

4. Represents shares held by a grantor retained annuity trust of which the Reporting Person is the sole trustee.

Remarks:

Chief Legal and Administrative Officer

	/s/ Todd DuChene	10/20/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)