Therese Tucker - 20 May 2026 Form 4 Insider Report for BLACKLINE, INC. (BL)

Reporting relationship
Founder, Director
Issuer ticker
BL
Reported as of
20 May 2026
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 4 source fields
SEC form
4
Accepted by SEC
21 May 2026, 16:25:11 UTC
Prior SEC filing
24 Feb 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Karole Morgan-Prager, Attorney-in-Fact

Key filing fact

Therese Tucker filed Form 4 for BLACKLINE, INC. (BL) on 21 May 2026.

Key facts

  • This page summarizes Therese Tucker's Form 4 filing for BLACKLINE, INC. (BL).
  • 3 reported transactions and 0 derivative rows are listed below.
  • Accepted by SEC: 21 May 2026, 16:25.

Change

  • Previous filing in this sequence was filed on 24 Feb 2026.
  • Current net transaction value: $0.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001688365 Primary reporting owner

Tucker Therese

Relationship
Founder, Director
Address
21300 VICTORY BLVD., 12TH FLOOR, WOODLAND HILLS
Signature
/s/ Karole Morgan-Prager, Attorney-in-Fact
Signature date
21 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

BL transaction

Common Stock

Tax liability

Transaction value
Shares
-2,222
Change %
-0.61%
Price
$30.84*
Shares after
359,438
Date
20 May 2026
Ownership
Direct
Footnotes
F1
BL transaction

Common Stock

Tax liability

Transaction value
Shares
-2,016
Change %
-0.56%
Price
$30.84*
Shares after
357,422
Date
20 May 2026
Ownership
Direct
Footnotes
F1
BL transaction

Common Stock

Tax liability

Transaction value
Shares
-2,425
Change %
-0.68%
Price
$30.84*
Shares after
354,997
Date
20 May 2026
Ownership
Direct
Footnotes
F1
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
100,178
Date
20 May 2026
Ownership
Brian and Therese Tucker Charitable Remainder Trust
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,509,881
Date
20 May 2026
Ownership
Brian and Therese Tucker Living Trust
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
0
Date
20 May 2026
Ownership
By: CS 2015 GRAT dated 9/28/2015
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
0
Date
20 May 2026
Ownership
By: SAFETY NET GRAT dated 9/28/2015
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
54,074
Date
20 May 2026
Ownership
Claire Seimetz 2015 Trust
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
577,200
Date
20 May 2026
Ownership
Isaac Tucker 2012 Irrevocable Trust
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
577,200
Date
20 May 2026
Ownership
Roseanna Tucker 2012 Irrevocable Trust
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
52,444
Date
20 May 2026
Ownership
Tucker Family CLAT
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
874,128
Date
20 May 2026
Ownership
Tucker Legacy Trust
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
129,897
Date
20 May 2026
Ownership
Tucker Legacy Trust II
BL holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
250,916
Date
20 May 2026
Ownership
Tucker Seimetz Safety Net Grat
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

The reported shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

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