Birkenstock (NYSE: BIRK) insider sells 28M-share block of stock

Rhea-AI Filing Summary

Birkenstock Holding plc director James Michael Chu reported an indirect sale of 28,146,226 ordinary shares of Birkenstock (BIRK) on 2026-08-17 at $39.18 per share. The shares were sold by BK LC Lux MidCo S.a r.l. in an underwritten block trade, with the reported price representing the amount MidCo received from the underwriter.

After this transaction, entities associated with Chu continued to hold 71,270,287 ordinary shares indirectly through MidCo. The filing explains that control over MidCo flows through several entities, and that Chu’s role as a director of certain entities may be deemed to provide voting and dispositive power over these shares. Chu disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest.

Insider Trade Summary

Net Seller: 28,146,226 shares

Net Sell 1 txn

Insider Chu James Michael

Role Director

Sold 28,146,226 shs ($1.10B)

Type	Security	Shares	Price	Value
Sale	Ordinary shares, no par value F1, F2, F3	28,146,226	$39.18	$1.10B

Holdings After Transaction: Ordinary shares, no par value — 71,270,287 shares (Indirect, By BK LC Lux MidCo S.a r.l.)

Footnotes (3)

1. F1. The reported price represents the price received from the underwriter by BK LC Lux MidCo S.a r.l. ("MidCo") in connection with an underwritten block trade.
2. F2. The reported securities are held directly by MidCo. The management of MidCo is controlled by BK LC Lux SCA. BK LC Lux GP S.a r.l. is the general partner of BK LC Lux SCA. The management of BK LC Lux GP S.a r.l. is controlled by LC9 Caledonia AIV GP, LLP. LC9 Caledonia AIV GP, LLP is managed by its members, Catterton Caledonia 1 Limited ("Caledonia 1") and Catterton Caledonia 2 Limited ("Caledonia 2"). The management of each of Caledonia 1 and Caledonia 2 is controlled by its directors. The Reporting Person's role as a director of Caledonia 1 and Caledonia 2 may be deemed to give him voting and dispositive power with respect to the shares held directly by MidCo.
3. F3. The Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

Key Figures

Shares sold: 28,146,226 shares Sale price per share: $39.18 per share Shares held after transaction: 71,270,287 shares +2 more

5 metrics

Shares sold 28,146,226 shares Ordinary shares sold indirectly by BK LC Lux MidCo S.a r.l. on 2026-08-17

Sale price per share $39.18 per share Price received from the underwriter by BK LC Lux MidCo S.a r.l. in an underwritten block trade

Shares held after transaction 71,270,287 shares Indirectly held through BK LC Lux MidCo S.a r.l. following the reported sale

Net shares sold 28,146,226 shares Net-sell direction based on transaction summary netBuySellShares

Number of sell transactions 1 Single non-derivative sale transaction reported in this Form 4

Key Terms

underwritten block trade, beneficial ownership, pecuniary interest, dispositive power

4 terms

underwritten block trade financial

"price received from the underwriter by BK LC Lux MidCo S.a r.l. in connection with an underwritten block trade"

beneficial ownership financial

"The Reporting Person disclaims beneficial ownership of the reported securities except to the extent"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest"

dispositive power financial

"may be deemed to give him voting and dispositive power with respect to the shares"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

FAQ

What transaction did James Michael Chu report in this Form 4 for BIRK?

James Michael Chu reported an indirect sale of 28,146,226 ordinary shares of Birkenstock Holding plc (BIRK) on 2026-08-17 at $39.18 per share through BK LC Lux MidCo S.a r.l. in an underwritten block trade.

What price was received in the reported BIRK share sale by BK LC Lux MidCo S.a r.l.?

The reported BIRK transaction lists a price of $39.18 per share, which represents the price received from the underwriter by BK LC Lux MidCo S.a r.l. in connection with an underwritten block trade, according to the filing footnote.

How many BIRK shares remain indirectly held after James Michael Chu’s reported sale?

Following the reported transaction, entities associated with James Michael Chu indirectly held 71,270,287 ordinary shares of Birkenstock Holding plc (BIRK) through BK LC Lux MidCo S.a r.l., as stated in the Form 4 data for total shares following the transaction.

Who actually holds the BIRK shares involved in James Michael Chu’s Form 4 transaction?

The BIRK shares are held directly by BK LC Lux MidCo S.a r.l.. The filing explains a chain of control entities above MidCo, with James Michael Chu serving as a director of two related entities that may give him voting and dispositive power over MidCo’s shares.

Does James Michael Chu claim full beneficial ownership of the reported BIRK shares?

No. James Michael Chu explicitly disclaims beneficial ownership of the reported BIRK securities except to the extent of his pecuniary interest, according to a footnote in the Form 4 that limits his claimed economic interest.

Was the BIRK share sale by BK LC Lux MidCo S.a r.l. done through an underwritten block trade?

Yes. A footnote states that the reported $39.18 per share price represents the amount received from the underwriter by BK LC Lux MidCo S.a r.l. in connection with an underwritten block trade of Birkenstock shares.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/17/2026 - 04:06 PM Accepted by SEC EDGAR 08/17/2026 - 04:05 PM Learn about SEC filing dates

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).

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^*

Chu James Michael

(Last) (First) (Middle)

599 WEST PUTNAM AVENUE

(Street)

GREENWICH CONNECTICUT 06830

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Birkenstock Holding plc [ BIRK ]

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

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/17/2026

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

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Ordinary shares, no par value	08/17/2026		S		28,146,226	D	$39.18(1)	71,270,287	I	By BK LC Lux MidCo S.a r.l.(2)(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. The reported price represents the price received from the underwriter by BK LC Lux MidCo S.a r.l. ("MidCo") in connection with an underwritten block trade.

2. The reported securities are held directly by MidCo. The management of MidCo is controlled by BK LC Lux SCA. BK LC Lux GP S.a r.l. is the general partner of BK LC Lux SCA. The management of BK LC Lux GP S.a r.l. is controlled by LC9 Caledonia AIV GP, LLP. LC9 Caledonia AIV GP, LLP is managed by its members, Catterton Caledonia 1 Limited ("Caledonia 1") and Catterton Caledonia 2 Limited ("Caledonia 2"). The management of each of Caledonia 1 and Caledonia 2 is controlled by its directors. The Reporting Person's role as a director of Caledonia 1 and Caledonia 2 may be deemed to give him voting and dispositive power with respect to the shares held directly by MidCo.

3. The Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

	/s/ James Michael Chu	08/17/2026
	** 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.
* Form 4: SEC 1474 (03-26)