Was the Teradata (TDC) CEO’s share sale a buy or sell transaction?

The Form 4 shows a sell transaction by Teradata CEO Stephen McMillan. He executed an open-market sale of 20,000 common shares, classified under transaction code “S,” which denotes a sale in the open market or a private transaction.

Teradata (TDC) CEO Stephen McMillan sells 20,000 shares at ~$31.71

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Teradata Corporation’s President and CEO Stephen McMillan reported an open-market sale of 20,000 shares of common stock at a weighted average price of $31.7079 per share. After this transaction, he directly holds 762,446 shares. The shares were sold in multiple trades between $31.40 and $32.10 per share.

Insider Trade Summary

Net Seller: 20,000 shares ($634,158)

Net Sell 1 txn

Insider MCMILLAN STEPHEN

Role President and CEO

Sold 20,000 shs ($634K)

Type	Security	Shares	Price	Value
Sale	Common Stock	20,000	$31.7079	$634K

Holdings After Transaction: Common Stock — 762,446 shares (Direct, null)

Footnotes (1)

[object Object]

Key Figures

Shares sold: 20,000 shares Average sale price: $31.7079 per share Post-transaction holdings: 762,446 shares +2 more

5 metrics

Shares sold 20,000 shares Open-market sale of common stock

Average sale price $31.7079 per share Weighted average across multiple trades

Post-transaction holdings 762,446 shares Common stock held directly after sale

Low trade price $31.40 per share Lowest price in sale range

High trade price $32.10 per share Highest price in sale range

Key Terms

Form 4, open-market sale, weighted average price, transaction code "S"

4 terms

Form 4 regulatory

"reported in a Form 4 insider filing for Teradata common stock"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

open-market sale financial

"reported an open-market sale of 20,000 shares of common stock"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

weighted average price financial

"The price in Column 4 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.

transaction code "S" regulatory

"classified under transaction code “S,” which denotes a sale"

Form 4 Insider Transactions: What Each Field Means →

05/13/2026 - 06:31 PM

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).

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^*

MCMILLAN STEPHEN

(Last)

(First)

(Middle)

C/O TERADATA CORPORATION

17095 VIA DEL CAMPO

(Street)

SAN DIEGO

CALIFORNIA

92127

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
TERADATA CORP /DE/ [ TDC ]

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

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/12/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/12/2026		S		20,000	D	$31.7079⁽¹⁾	762,446	D

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.40 to $32.10. The reporting person has provided to the issuer and will provide any security holder of the issuer or the SEC staff, upon request, information regarding the number of shares sold at each price within the range.

Remarks:

	/s/ Juliet C. Shadoan, Attorney-in-fact for Stephen McMillan	05/13/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Teradata (TDC) report for CEO Stephen McMillan?

Teradata reported that CEO Stephen McMillan sold 20,000 shares of common stock in an open-market transaction at a weighted average price of $31.7079 per share. Following the sale, he directly holds 762,446 Teradata shares.

At what prices did Teradata (TDC) CEO Stephen McMillan sell his shares?

Stephen McMillan’s 20,000 Teradata shares were sold in multiple trades at prices ranging between $31.40 and $32.10 per share. The reported transaction price of $31.7079 is a weighted average across those trades.

How many Teradata (TDC) shares does the CEO hold after the latest Form 4?

After the reported sale, Teradata CEO Stephen McMillan directly owns 762,446 shares of the company’s common stock. This figure reflects his post-transaction holdings as disclosed in the Form 4 insider filing.

Does the Teradata (TDC) Form 4 mention multiple trade executions for the CEO’s sale?

Yes. The Form 4 notes that the 20,000 shares were sold in multiple transactions at prices between $31.40 and $32.10. The reported price is a weighted average, and detailed price breakdowns are available upon request.