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  4. [Form 4] BLACKLINE, INC. Insider Trading Activity

Director at BlackLine (BL) sells 1,637 shares under 10b5-1 plan

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

Rhea-AI Filing Summary

BLACKLINE, INC. director Gregory Hughes reported an open-market sale of 1,637 shares of Common Stock at $30.25 per share. After this transaction, he directly owned 7,755 shares. The sale was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on February 19, 2026.

Positive

  • None.

Negative

  • None.
Insider HUGHES GREGORY
Role null
Sold 1,637 shs ($50K)
Type Security Shares Price Value
Sale Common Stock 1,637 $30.25 $50K
Holdings After Transaction: Common Stock — 7,755 shares (Direct, null)
Footnotes (1)
  1. [object Object]
Shares sold 1,637 shares Open-market sale of Common Stock
Sale price $30.25 per share Price for the 1,637-share sale
Shares owned after transaction 7,755 shares Direct holdings following the sale
Net shares sold 1,637 shares Net buy/sell direction reported as net-sell
Sell transactions count 1 transaction Single open-market sale reported
Rule 10b5-1 trading plan regulatory
"The transaction was effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 19, 2026."
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
open-market sale financial
"transaction_action is described as an open-market sale 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.
Form 4 regulatory
"The transaction reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan."
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.
Form 4 Insider Transactions: What Each Field Means →
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).
X
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*
HUGHES GREGORY
(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
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026		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 Stock05/21/2026S(1)1,637D$30.257,755D
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 transaction reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 19, 2026.
/s/ Karole Morgan-Prager, Attorney-in-Fact05/22/2026
** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did BlackLine (BL) director Gregory Hughes report?

Gregory Hughes reported selling 1,637 shares of BlackLine Common Stock in an open-market transaction at $30.25 per share. The filing shows this as a routine Form 4 disclosure of insider trading activity in the company’s stock.

At what price did Gregory Hughes sell BlackLine (BL) shares?

He sold 1,637 BlackLine Common Stock shares at $30.25 per share. This price reflects the execution level for the open-market sale disclosed and is the only transaction price specified in the Form 4 data.

How many BlackLine (BL) shares does Gregory Hughes hold after the sale?

After the reported sale, Gregory Hughes directly owned 7,755 shares of BlackLine Common Stock. This post-transaction holding figure comes from the Form 4 and shows his remaining direct equity stake following the single open-market sale.

Was Gregory Hughes’ BlackLine (BL) share sale under a Rule 10b5-1 plan?

Yes. A footnote explains the transaction was effectuated under a Rule 10b5-1 trading plan adopted on February 19, 2026. Such pre-arranged plans are designed to systematize trades and reduce concerns about discretionary timing.

Does the Form 4 show any BlackLine (BL) option exercises or derivative trades?

No derivative transactions are listed in the provided data. The derivative summary is empty and the transaction summary shows zero exercises, indicating only a single non-derivative open-market sale of Common Stock was reported in this filing.