GitLab director's trust proposes $18.4M share sale

Earlier trust sales are labeled 10b5-1 sales, and Morgan Stanley Smith Barney LLC is listed in connection with the proposed sale.

Rhea-AI Filing Summary

GitLab Inc. (GTLB) lists a proposed sale by the Sytse Sijbrandij Revocable Trust of 348,600 common shares, with an approximate sale date of October 19, 2026, and an aggregate market value of $18,392,136. Sytse Sijbrandij is identified as a director. The trust’s three listed sales during the prior three months are labeled 10b5-1 sales: 430,000 shares on September 28, 705,490 shares on September 25, and 980,710 shares on September 24, 2026.

Key Figures

Proposed shares to be sold: 348,600 common shares Aggregate market value: $18,392,136 Shares sold: 430,000 shares +2 more

5 metrics

Proposed shares to be sold 348,600 common shares Approximate sale date October 19, 2026

Aggregate market value $18,392,136 Proposed sale

Shares sold 430,000 shares September 28, 2026; labeled a 10b5-1 sale

Shares sold 705,490 shares September 25, 2026; labeled a 10b5-1 sale

Shares sold 980,710 shares September 24, 2026; labeled a 10b5-1 sale

Key Terms

Rule 144, 10b5-1 Sales, Founders Shares

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

10b5-1 Sales regulatory

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

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Founders Shares technical

"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.

How many GTLB shares does the Sytse Sijbrandij Revocable Trust plan to sell?

The Sytse Sijbrandij Revocable Trust lists a proposed sale of 348,600 common shares, with an approximate sale date of October 19, 2026, and an aggregate market value of $18,392,136.

What recent sales by the Sytse Sijbrandij Revocable Trust are listed for GTLB?

Three earlier trust sales are labeled 10b5-1 sales: 430,000 shares on September 28, 2026; 705,490 shares on September 25, 2026; and 980,710 shares on September 24, 2026.

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

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Available on EDGAR 10/19/2026 - 04:26 PM EDT Accepted by SEC EDGAR 10/19/2026 - 04:25 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

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	18392136.00	165500000	10/19/2026	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	09/28/2026	430000	19709910.00
10b5-1 Sales for SYTSE SIJBRANDIJ REVOCABLE TRUST 268 BUSH STREET, #350 SAN FRANCISCO CA 94104	Common	09/25/2026	705490	33683761.15
10b5-1 Sales for SYTSE SIJBRANDIJ REVOCABLE TRUST 268 BUSH STREET, #350 SAN FRANCISCO CA 94104	Common	09/24/2026	980710	47694084.86

144: Remarks and Signature

Remarks
Date of Notice	10/19/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/25/2026
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)