STOCK TITAN

Therese Tucker (BL) has shares withheld for RSU tax obligations

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

BLACKLINE, INC. founder and director Therese Tucker reported routine share dispositions tied to taxes on equity compensation. On May 20, 2026, a total of 6,663 shares of common stock were withheld at $30.84 per share to cover her tax liability from vesting restricted stock units, rather than sold in the open market.

The filing also details substantial indirect holdings in various family and estate-planning trusts, including the Brian and Therese Tucker Living Trust and several legacy and irrevocable trusts, reflecting how her BlackLine ownership is spread across multiple entities.

Positive

  • None.

Negative

  • None.
Insider Tucker Therese
Role Founder
Type Security Shares Price Value
Tax Withholding Common Stock 2,222 $30.84 $69K
Tax Withholding Common Stock 2,016 $30.84 $62K
Tax Withholding Common Stock 2,425 $30.84 $75K
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 359,438 shares (Direct, null); Common Stock — 100,178 shares (Indirect, Brian and Therese Tucker Charitable Remainder Trust)
Footnotes (1)
  1. [object Object]
Tax-withholding shares 6,663 shares Total F-code dispositions for tax liability on May 20, 2026
Tax-withholding price $30.84/share Value per share for F-code tax-withholding transactions
Direct holdings after one F transaction 359,438 shares Common stock directly held after an F-code transaction on May 20, 2026
Living Trust indirect holdings 1,509,881 shares Brian and Therese Tucker Living Trust common stock position
Tucker Legacy Trust holdings 874,128 shares Common stock held by Tucker Legacy Trust as of May 20, 2026
Tucker Seimetz Safety Net GRAT holdings 250,916 shares Common stock held by Tucker Seimetz Safety Net GRAT
restricted stock units financial
"tax liability in connection with 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.
tax-withholding disposition financial
"transaction_action": "tax-withholding disposition""
A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.
indirect financial
""ownership_type": "indirect""
grantor retained annuity trust (GRAT) financial
"By: SAFETY NET GRAT dated 9/28/2015"
charitable remainder trust financial
"Brian and Therese Tucker Charitable Remainder Trust"
SEC Form 4
FORM 4UNITED 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*
Tucker Therese

(Last)(First)(Middle)
21300 VICTORY BLVD., 12TH FLOOR

(Street)
WOODLAND HILLS CALIFORNIA 91367

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
BLACKLINE, INC. [ BL ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Founder
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/20/2026F2,222(1)D$30.84359,438D
Common Stock05/20/2026F2,016(1)D$30.84357,422D
Common Stock05/20/2026F2,425(1)D$30.84354,997D
Common Stock100,178IBrian and Therese Tucker Charitable Remainder Trust
Common Stock1,509,881IBrian and Therese Tucker Living Trust
Common Stock0IBy: CS 2015 GRAT dated 9/28/2015
Common Stock0IBy: SAFETY NET GRAT dated 9/28/2015
Common Stock54,074IClaire Seimetz 2015 Trust
Common Stock577,200IIsaac Tucker 2012 Irrevocable Trust
Common Stock577,200IRoseanna Tucker 2012 Irrevocable Trust
Common Stock52,444ITucker Family CLAT
Common Stock874,128ITucker Legacy Trust
Common Stock129,897ITucker Legacy Trust II
Common Stock250,916ITucker Seimetz Safety Net Grat
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. The reported shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.
/s/ Karole Morgan-Prager, Attorney-in-Fact05/21/2026
** Signature of Reporting PersonDate
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)

FAQ

What did Therese Tucker report in her latest Form 4 for BLACKLINE (BL)?

Therese Tucker reported that 6,663 BlackLine common shares were withheld on May 20, 2026 to cover tax liabilities from vesting restricted stock units. These transactions are coded as tax-withholding dispositions, not open-market sales, and reflect routine handling of equity compensation taxes.

How many BLACKLINE (BL) shares were used to cover Therese Tucker’s tax obligations?

A total of 6,663 BlackLine common shares were withheld to satisfy Therese Tucker’s tax liabilities. The shares were valued at $30.84 each, according to the Form 4, and relate specifically to the vesting of restricted stock units granted as part of her compensation.

Were Therese Tucker’s BLACKLINE (BL) Form 4 transactions open-market sales?

The Form 4 shows no open-market sales by Therese Tucker. Instead, three transactions coded “F” represent shares withheld by the company at $30.84 per share to pay taxes arising from the vesting of restricted stock units, a common administrative equity event.

What does the Form 4 reveal about Therese Tucker’s indirect BLACKLINE (BL) holdings?

The Form 4 lists sizeable indirect BlackLine holdings through multiple trusts, including the Brian and Therese Tucker Living Trust and several legacy and irrevocable trusts. Each entry shows common stock positions as of May 20, 2026, illustrating her ownership spread across various family-related entities.

What is the significance of the tax-withholding code “F” in the BLACKLINE (BL) Form 4?

Code “F” in the Form 4 indicates shares delivered to pay exercise price or tax liabilities. For BlackLine, 6,663 shares tied to Therese Tucker’s restricted stock unit vesting were withheld at $30.84, designating a tax-withholding disposition rather than a discretionary buy or sell decision.