[Form 4] Atlassian Corp Insider Trading Activity

Rhea-AI Filing Summary

Michael Cannon-Brookes, Atlassian director and 10% owner, reported three dispositions of Class A common stock on 10/09/2025 executed under a Rule 10b5-1 trading plan adopted on 02/20/2025. The Form 4 shows sales in multiple trades at prices ranging from $147.65 to $150.58, with weighted-average prices reported for each block.

The filing lists successive reductions in shares beneficially owned indirectly through CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust: ownership totals reported after the three transactions are 443,670, 438,355 and 436,905 shares respectively. The Form is signed by an attorney-in-fact and includes standard execution detail and footnote commitments to provide trade-level pricing on request.

Positive

• Transactions executed under a Rule 10b5-1 plan, reducing concerns about opportunistic trading
• Clear disclosure of price ranges and weighted-average prices with an undertaking to provide trade-level details on request
• Filing signed and submitted properly (attorney-in-fact signature present)

Negative

• Indirect beneficial ownership was reduced across the reported trades (reported holdings fell from 443,670 to 436,905 shares)
• Sales by a 10% owner and director can attract investor attention even when executed under a 10b5-1 plan

Insights

Corporate Governance Analyst

Insider sales followed a pre-established 10b5-1 plan, reducing indirect holdings modestly.

The trades were executed under a Rule 10b5-1 plan adopted on 02/20/2025, which provides an affirmative defense against insider trading claims when properly structured and followed. That procedural detail helps separate these sales from opportunistic, ad-hoc insider disposals.

Key dependencies include the plan terms and any blackout or trading-window constraints; monitor any future filings for additional plan-based activity or amendments within the coming months.

Equity Markets Specialist

Three blocks of Class A stock were sold across a $147.65–$150.58 intraday price range.

The Form 4 discloses three dispositions executed on 10/09/2025 with weighted-average prices reported per block. Sales were done in multiple trades, and the reporting person offered to provide detailed trade-level prices and quantities on request.

Market implications are limited given the absence of option exercises or derivative activity; investors may watch subsequent Form 4s for any pattern of additional planned sales over the next quarter.

SEC Form 4

FORM 4

UNITED 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^*

Cannon-Brookes Michael

(Last) (First) (Middle)

C/O ATLASSIAN CORPORATION

350 BUSH STREET, FLOOR 13

(Street)

SAN FRANCISCO CA 94104

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Atlassian Corp [ TEAM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	CEO, Co-Founder

3. Date of Earliest Transaction (Month/Day/Year)
10/09/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	10/09/2025		S(1)		900	D	$150.0661(2)	443,670	I	See Footnote(3)
Class A Common Stock	10/09/2025		S(1)		5,315	D	$148.1166(4)	438,355	I	See Footnote(3)
Class A Common Stock	10/09/2025		S(1)		1,450	D	$149.1599(5)	436,905	I	See Footnote(3)

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 20, 2025.

2. This transaction was executed in multiple trades during the day at prices ranging from $149.65 to $150.58. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

3. Shares are held by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust.

4. This transaction was executed in multiple trades during the day at prices ranging from $147.65 to $148.62. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

5. This transaction was executed in multiple trades during the day at prices ranging from $148.65 to $149.56. The weighted-average price is reported above. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.

Remarks:

	/s/ Veena Bhatia, Attorney-in-Fact for Cannon-Brookes Michael	10/10/2025
	** Signature of Reporting Person	Date
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.

FAQ

What did Michael Cannon-Brookes report on Form 4 for TEAM?

The Form 4 reports three dispositions of Class A common stock on 10/09/2025, executed under a Rule 10b5-1 trading plan.

How many shares did the filing show after the transactions?

The filing reports successive post-transaction indirect holdings of 443,670, 438,355, and 436,905 shares held through CBC Co Pty Limited as trustee.

At what prices were the shares sold?

Sales were executed in multiple trades with reported price ranges of $147.65–$148.62, $148.65–$149.56, and $149.65–$150.58, and weighted-average prices are shown per block.

Were these trades discretionary or pre-planned?

They were executed pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 02/20/2025.

Who holds the shares reported on the Form 4?

The shares are held indirectly by CBC Co Pty Limited as trustee for the Cannon-Brookes Head Trust, per the filing.