GTLB affiliate files Form 144 to sell 348,600 shares

Affiliated holder filed a Form 144 proposing the sale of 348,600 Founders Shares.

Rhea-AI Filing Summary

Affiliated holder filed a Form 144 proposing the sale of 348,600 Founders Shares. The filing also discloses a Rule 10b5-1 sale of 54,300 common shares by the Sy tse Sijbrandij Revocable Trust on 02/17/2026 for $1,542,304.62. Shares outstanding are listed as 153,400,000 as of 04/15/2026.

Insights

Securities Compliance Analyst

Routine affiliate resale notice with an executed 10b5-1 sale reported.

The filing lists a proposed sale of 348,600 Founders Shares and records a prior 10b5-1 sale of 54,300 shares on 02/17/2026 for $1,542,304.62. This is a standard Form 144 disclosure by an affiliate rather than an issuer-initiated transaction.

Regulatory attention centers on plan-based executions; the presence of a 10b5-1 instruction suggests pre-arranged sales. Timing and further sale amounts depend on the holder's plan and market activity, not on company action.

Key Figures

Proposed sale: 348,600 shares 10b5-1 sale executed: 54,300 shares Proceeds reported: $1,542,304.62 +1 more

4 metrics

Proposed sale 348,600 shares Founders Shares (proposed in Form 144)

10b5-1 sale executed 54,300 shares <date>02/17/2026</date>

Proceeds reported <money>$1,542,304.62</money> Proceeds from 10b5-1 sale on <date>02/17/2026</date>

Shares outstanding 153,400,000 shares as of <date>04/15/2026</date>

Key Terms

Form 144, 10b5-1, Founders Shares

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

10b5-1 regulatory

"10b5-1 Sales for SYTSE SIJBRANDIJ REVOCABLE TRUST"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Founders Shares market

"Common | 08/28/2015 | Founders Shares"

Founders shares are a special block of a company’s stock originally given to the people who started the business; they often carry extra voting power or favorable terms compared with regular shares. For investors, these shares matter because they concentrate control and influence how future funding, ownership dilution, and decision-making will play out—think of founders shares as the steering wheel that can steer a company’s direction even as more passengers (investors) climb aboard.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does GTLB's Form 144 disclose about proposed share sales?

It discloses a proposed sale of 348,600 Founders Shares by an affiliate. The filing also records a separate 10b5-1 sale of 54,300 shares completed on 02/17/2026 for $1,542,304.62.

Who sold shares under the 10b5-1 plan disclosed in GTLB's Form 144?

The Sy tse Sijbrandij Revocable Trust executed the 10b5-1 sale of 54,300 common shares on 02/17/2026. The filing lists the trust's address and the sale proceeds of $1,542,304.62.

How many GTLB shares are outstanding per the filing?

Shares outstanding are listed as 153,400,000 as of 04/15/2026. This figure appears on the securities line in the filing and provides a baseline ownership context.

Does the Form 144 indicate company involvement in the sales for GTLB?

No; the filing shows affiliate resale activity and a 10b5-1 plan sale by a trust. The document lists the sales as holder-driven rather than issuer-directed transactions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/15/2026 - 04:52 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001886022
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	GITLAB INC.
SEC File Number	001-40895
Address of Issuer	268 BUSH STREET, #350 SAN FRANCISCO CALIFORNIA 94104
Phone	6504745175
Name of Person for Whose Account the Securities are To Be Sold	SYTSE SIJBRANDIJ REVOCABLE TRUST
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director
Relationship to Issuer	Officer
Relationship to Issuer	10% Stockholder

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	348600	6999888.00	153400000	04/15/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/28/2015	Founders Shares	issuer			348600	08/28/2015	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for SYTSE SIJBRANDIJ REVOCABLE TRUST 268 BUSH STREET, #350 SAN FRANCISCO CA 94104	Common	02/17/2026	54300	1542304.62

144: Remarks and Signature

Remarks
Date of Notice	04/15/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/19/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Syste Sijbrandij
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)