Teradata’s Stephen McMillan proposes $318K share sale

The notice also lists a September 15, 2026 sale of 10,000 shares for $300,171 in gross proceeds under “10b5-1 Sales.”

Available on EDGAR 11/09/2026 - 04:36 PM EST Accepted by SEC EDGAR 11/09/2026 - 04:35 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Teradata Corporation (TDC) reports that Stephen McMillan, identified as a director and officer, gave notice of a proposed sale of 10,000 common shares, with an aggregate market value of $318,000 and an approximate sale date of November 9, 2026. The shares were acquired from the issuer as restricted stock units on March 1, 2024. The notice also lists 10,000 common shares sold on September 15, 2026, for gross proceeds of $300,171 under “10b5-1 Sales,” and records May 18, 2026, as the plan adoption or instruction date if relying on Rule 10b5-1.

Key Figures

Proposed sale: 10,000 common shares Aggregate market value: $318,000 Shares outstanding: 91,400,000 shares +3 more

6 metrics

Proposed sale 10,000 common shares Approximate sale date: November 9, 2026

Aggregate market value $318,000 Proposed sale of common shares

Shares outstanding 91,400,000 shares Number of shares or other units outstanding in the securities information

Recent shares sold 10,000 common shares Sale on September 15, 2026

Gross proceeds $300,171 Sale on September 15, 2026

Restricted stock units acquired 10,000 units Acquired from the issuer on March 1, 2024

Key Terms

Restricted Stock Units, Aggregate Market Value, 10b5-1 Sales

3 terms

Restricted Stock Units financial

"Nature of Acquisition Transaction: 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.

Aggregate Market Value financial

"Aggregate Market Value"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

10b5-1 Sales regulatory

"10b5-1 Sales for Stephen McMillan"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

FAQ

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

How many TDC shares does Stephen McMillan propose to sell?

Stephen McMillan's notice covers a proposed sale of 10,000 common shares, with an aggregate market value of $318,000 and an approximate sale date of November 9, 2026.

How many TDC shares did Stephen McMillan sell recently?

The notice lists 10,000 common shares sold on September 15, 2026, for gross proceeds of $300,171 under “10b5-1 Sales” for Stephen McMillan.

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

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001719723
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	TERADATA CORPORATION
SEC File Number	001-33458
Address of Issuer	17095 Via Del Campo San Diego CALIFORNIA 92127
Phone	(866)548-8348
Name of Person for Whose Account the Securities are To Be Sold	STEPHEN MCMILLAN
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	10000	318000.00	91400000	11/09/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	03/01/2024	Restricted Stock Units	Issuer			10000	03/01/2024	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for STEPHEN MCMILLAN 17095 Via Del Campo San Diego CA 92127	Common	09/15/2026	10000	300171.00

144: Remarks and Signature

Remarks
Date of Notice	11/09/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/18/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Stephen McMillan
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)