Lynrock Lake discloses 6.6% Teradata (TDC) holding in Schedule 13D/A

Rhea-AI Filing Summary

Lynrock Lake and related reporting persons filed Amendment No. 3 to their Schedule 13D on Teradata Corporation. They report beneficial ownership of 6,212,370 shares of Teradata common stock, representing 6.6% of the company’s outstanding shares, based on 94.1 million shares outstanding as of April 24, 2026.

The aggregate purchase price for these shares is approximately $138,013,131, funded from Lynrock Lake Master Fund LP’s working capital, which may include margin loans from brokerage firms. Voting and investment power over the Teradata position is held by Lynrock Lake Partners LLC as investment manager, with Chief Investment Officer Cynthia Paul potentially deemed to share such powers. Recent open-market transactions are listed in a new exhibit.

Insights

Equity ownership & activism analyst

Lynrock Lake discloses a sizable 6.6% Teradata stake funded via its main fund.

Lynrock Lake Master Fund LP reports holding 6,212,370 Teradata shares, or 6.6% of the company, at an aggregate cost of about $138,013,131. This positions the fund as a notable minority shareholder with sole voting and dispositive power through its investment manager.

The filing clarifies that Lynrock Lake Partners LLC manages the position and that CIO Cynthia Paul may be deemed to have voting and investment power. The percentage is calculated using 94.1 million shares outstanding as of April 24, 2026, giving a clear sense of scale but not indicating any specific strategic intentions.

Key Figures

Teradata shares owned: 6,212,370 shares Ownership percentage: 6.6% Shares outstanding baseline: 94.1 million shares +3 more

6 metrics

Teradata shares owned 6,212,370 shares Beneficially owned by reporting persons

Ownership percentage 6.6% Percent of Teradata common stock class

Shares outstanding baseline 94.1 million shares Teradata shares outstanding as of April 24, 2026

Aggregate purchase price $138,013,131 Total cost for 6,212,370 shares including commissions

Sole voting power 6,212,370 shares Reported for each reporting person

Date of event July 6, 2026 Date of event requiring this Schedule 13D amendment

Key Terms

beneficially owned, sole voting power, sole dispositive power, Schedule 13D, +2 more

6 terms

beneficially owned financial

"aggregate number of shares of Common Stock and percentages of the shares of Common Stock beneficially owned by such Reporting Person"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Number of Shares Beneficially Owned by Each Reporting Person With: | 7 | Sole Voting Power 6,212,370.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"9 | Sole Dispositive Power 6,212,370.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Schedule 13D regulatory

"constitutes Amendment No. 3 ("Amendment No. 3") to the filed by the undersigned"

A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.

margin loans financial

"which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business"

Margin loans are loans from a brokerage that let an investor borrow money using their existing stocks, bonds or cash as collateral to buy more securities. They matter because borrowing magnifies both gains and losses—like using a lever to move a heavier load—so small market moves can have outsized effects on your returns; investors also pay interest and risk a margin call, where the broker may force sales if collateral falls below required levels.

open market financial

"All of such transactions were effected in the open market unless otherwise noted therein"

An open market is a system where buying and selling of goods, services, or financial assets happen freely without restrictions or special controls. For investors, it means they can trade assets easily and quickly, which helps determine fair prices based on supply and demand. This environment encourages transparency and competition, making it easier to buy or sell with confidence.

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Available on EDGAR 07/08/2026 - 06:42 PM Accepted by SEC EDGAR 07/08/2026 - 06:41 PM Learn about SEC filing dates

FAQ

What ownership stake in Teradata (TDC) does Lynrock Lake report in this Schedule 13D/A?

Lynrock Lake reports beneficial ownership of 6,212,370 Teradata common shares, representing 6.6% of the company. This percentage is based on 94.1 million shares outstanding as of April 24, 2026, according to Teradata’s Form 10-Q.

How much did Lynrock Lake pay for its Teradata (TDC) shares?

Lynrock Lake states that the aggregate purchase price for its Teradata position is approximately $138,013,131. This amount, including brokerage commissions, reflects the cost of acquiring 6,212,370 common shares through its Lynrock Lake Master Fund LP vehicle.

Who holds voting and investment power over Lynrock Lake’s Teradata (TDC) shares?

Voting and investment power over the Teradata shares is held by Lynrock Lake Partners LLC, the investment manager of Lynrock Lake Master Fund LP. Cynthia Paul, the firm’s Chief Investment Officer and sole member of its general partner, may be deemed to exercise these powers.

How was Lynrock Lake’s Teradata (TDC) position funded according to the filing?

The filing explains that the Teradata shares were purchased using Lynrock Fund’s working capital, consisting of contributions from its general and limited partners. It notes that this working capital may include margin loans from brokerage firms made in the ordinary course of business.

What new information does Amendment No. 3 to Lynrock Lake’s Teradata (TDC) Schedule 13D provide?

Amendment No. 3 updates source of funds, clarifies ownership percentages and share counts, and adds an exhibit listing recent transactions. It confirms a 6,212,370-share Teradata stake, equal to 6.6% of outstanding stock as of April 24, 2026.

Where are Lynrock Lake’s recent Teradata (TDC) trades described in this Schedule 13D/A?

Recent transactions in Teradata securities by the reporting persons are summarized in Exhibit 1. The filing notes that all such trades were conducted in the open market unless otherwise indicated in that exhibit, which is incorporated by reference.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 3)

TERADATA CORP /DE/

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

88076W103

(CUSIP Number)

Cynthia Paul
Lynrock Lake LP, 2 International Drive, Suite 130
Rye Brook, NY, 10573
914-449-4660

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

07/06/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 88076W103

1

Name of reporting person

Lynrock Lake LP

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 6,212,370.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 6,212,370.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

6,212,370.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

6.6 %

14

Type of Reporting Person (See Instructions)

IA, PN

SCHEDULE 13D

CUSIP Number(s): 88076W103

1

Name of reporting person

LYNROCK LAKE PARTNERS LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 6,212,370.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 6,212,370.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

6,212,370.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

6.6 %

14

Type of Reporting Person (See Instructions)

HC, OO

SCHEDULE 13D

CUSIP Number(s): 88076W103

1

Name of reporting person

Paul Cynthia

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

AF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 6,212,370.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 6,212,370.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

6,212,370.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

6.6 %

14

Type of Reporting Person (See Instructions)

IN, HC

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock, par value $0.01 per share
(b)	Name of Issuer: TERADATA CORP /DE/
(c)	Address of Issuer's Principal Executive Offices: 17095 VIA DEL CAMPO, SAN DIEGO, CALIFORNIA , 92127.
Item 1 Comment: The following constitutes Amendment No. 3 ("Amendment No. 3") to the Schedule 13D filed by the undersigned with the Securities and Exchange Commission (the "SEC") on March 21, 2025, and amended on February 12, 2026 and June 17, 2026 (as amended, the "Schedule 13D"). This Amendment No. 3 amends and supplements the Schedule 13D as set forth below. Capitalized terms used herein and not otherwise defined in this Amendment No. 3 have the meanings set forth in the Schedule 13D.
Item 3.	Source and Amount of Funds or Other Consideration
	Item 3 is hereby amended and restated to read as follows: The source of the capital to purchase securities of the Issuer was Lynrock Fund's (as defined below) working capital, consisting of contributions from its general and limited partners (and which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business). The aggregate purchase price of the 6,212,370 shares of Common Stock reported herein is approximately $138,013,131, including brokerage commissions.
Item 5.	Interest in Securities of the Issuer
(a)	Item 5(a) is hereby amended and restated to read as follows: Rows 11 and 13 of each Reporting Person's cover page to this Schedule 13D set forth the aggregate number of shares of Common Stock and percentages of the shares of Common Stock beneficially owned by such Reporting Person and are incorporated by reference. The percentage set forth in each row 13 is based upon 94.1 million shares of the Issuer's Common Stock outstanding as of April 24, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on May 6, 2026. The Reporting Persons' ownership of the Issuer's securities consists of 6,212,370 shares of Common Stock held directly by Lynrock Lake Master Fund LP ("Lynrock Fund"). The Investment Manager is the investment manager of Lynrock Fund, and pursuant to an investment management agreement, the Investment Manager has been delegated full voting and investment power over securities of the Issuer held by Lynrock Fund. Ms. Paul, the Chief Investment Officer of the Investment Manager and Sole Member of the General Partner, the general partner of the Investment Manager, may be deemed to exercise voting and investment power over securities of the Issuer held by Lynrock Fund.
(c)	Item 5(c) is hereby amended and restated to read as follows: The transactions in the securities of the Issuer by the Reporting Persons since the filing of Amendment No. 2 to the Schedule 13D are set forth in Exhibit 1 and are incorporated herein by reference. All of such transactions were effected in the open market unless otherwise noted therein.
Item 7.	Material to be Filed as Exhibits.
	Item 7 is hereby amended to add the following exhibit: 1 - Transactions in Securities.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Lynrock Lake LP

Signature:	/s/ Cynthia Paul
Name/Title:	Cynthia Paul, Sole Member of Lynrock Lake Partners LLC, its General Partner
Date:	07/08/2026

LYNROCK LAKE PARTNERS LLC

Signature:	/s/ Cynthia Paul
Name/Title:	Cynthia Paul, Sole Member
Date:	07/08/2026

Paul Cynthia

Signature:	/s/ Cynthia Paul
Name/Title:	Cynthia Paul
Date:	07/08/2026