BIRK insider ownership: who sold, why, and what they still hold

What stands out

Two insiders sold $1.11B with no disclosed plan: James Chu ($1.10B) and Mehdi Bouyakhf ($3.8M). The filings don't state a reason.James Chu: largest such sale, Aug 17, 2026 · Mehdi Bouyakhf: largest such sale, Jun 5, 2026

Selling picked up in the last 90 days: officers and directors sold 28.15M shares, against an average of 66K per 90 days earlier in the period. Most of it was James Chu (28.15M shares in the last 90 days); 0% of these sales were under disclosed plans.James Chu: largest recent sale, Aug 17, 2026

A share of stake is shown for 0 of the 2 officers and directors who sold. 13 are left out

Left out: James Chu, Oliver Reichert, Markus Baum, Mehdi Bouyakhf, Jochen Gutzy, Klaus Baumann, Christian Heesch, Ruth Kennedy, Ivica Krolo, Anne Pitcher, Nisha Kumar, Alexandre Arnault and Nikhil Thukral (share of stake is being verified).

Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, since March 18, 2026. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.

James Chu

Director

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$1.10BNo plan disclosed

Mehdi Bouyakhf

President EMEA

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$3.8MNo plan disclosed

Amounts, filings and trading plans for each seller

Selling by month

Officers and directors, Mar 2026 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

No plan disclosedOne dollar scale for every month; the tallest bar is labeled

Recent activity

Past 30 days, Sep 17, 2026 to Oct 16, 2026

No officer or director trades were reported for the past 30 days. The most recent before that:

Aug 17, 2026James Chu sold 28.15M shares ($1.10B) with no plan disclosed.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
James Chu Director	28,146,226	$39.18	n/a	n/a	Aug 17, 2026	Aug 17, 2026

Common questions

Is the Birkenstock Holding plc CEO selling stock?

No. Oliver Reichert reported no open-market sales since March 18, 2026.

Why are Birkenstock Holding plc insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 0% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 100% had no disclosed plan. A trading plan schedules sales in advance.

Are any Birkenstock Holding plc insiders buying?

No. Officers and directors reported no purchases since March 18, 2026.

The evidence

Who sold2 officers and directors: amount, % of holdings, trading plan

Who sold	Amount	% of holdings	Trading plan
James Chu Director	$1.10B 28.15M shares	Not confirmed share of stake is being verified. Why	No plan disclosed
Mehdi Bouyakhf President EMEA	$3.8M 90K shares	Not confirmed share of stake is being verified. Why	No plan disclosed

The full ownership picture0 of 13 officers and directors confirmed

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

Insider	Held Mar 17, 2026	Sold	Held Oct 16, 2026	Still held
James Chu ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for James Chu are complete. Director	n/a	−28.15M	n/a	n/a
Vesting, gifts, unvested awards and holding lines for James Chu Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for James Chu are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)
Oliver Reichert ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Oliver Reichert are complete. Chief Executive Officer, Director	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Oliver Reichert Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Oliver Reichert are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)
Markus Baum ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Markus Baum are complete. Chief Product Officer	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Markus Baum Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Markus Baum are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)
Mehdi Bouyakhf ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Mehdi Bouyakhf are complete. President EMEA	n/a	−90K	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Mehdi Bouyakhf Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Mehdi Bouyakhf are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)
Jochen Gutzy ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Jochen Gutzy are complete. Chief Communications Officer	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Jochen Gutzy Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Jochen Gutzy are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)
Klaus Baumann ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Klaus Baumann are complete. Chief Sales Officer	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Klaus Baumann Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Klaus Baumann are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)
Christian Heesch ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Christian Heesch are complete. Chief Legal Officer	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Christian Heesch Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Christian Heesch are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)
Ruth Kennedy ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ruth Kennedy are complete. Director	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Ruth Kennedy Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ruth Kennedy are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −744withheld by the company for taxes
Ivica Krolo ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Ivica Krolo are complete. Chief Financial Officer	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Ivica Krolo Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Ivica Krolo are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)
Anne Pitcher ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Anne Pitcher are complete. Director	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Anne Pitcher Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Anne Pitcher are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −325withheld by the company for taxes
Nisha Kumar ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Nisha Kumar are complete. Director	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Nisha Kumar Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Nisha Kumar are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −690withheld by the company for taxes
Alexandre Arnault ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Alexandre Arnault are complete. Director	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Alexandre Arnault Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Alexandre Arnault are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts) −690withheld by the company for taxes
Nikhil Thukral ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Nikhil Thukral are complete. Director	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Nikhil Thukral Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Nikhil Thukral are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)

Holdings and share of stake for Birkenstock Holding plc are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.

What explains the selling$1.11B of sales by plan status, purpose, seller and month

Officer and director open-market sales: $1.11B across 28,236,226 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

No plan disclosed · $1.11B

Sales with no 10b5-1 plan and no tax reference in the filing. $1.10B of it is James Chu. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: James Chu, Aug 17, 2026

Taxes

2,449 shares ($92K) were withheld by the company for taxes, which isn't a market sale.

Seller	Shares sold	Proceeds	Under a disclosed plan	Share of total	Sales dates
James Chu Director	28.15M	$1.10B	0%	99.7%	Aug 17, 2026 to Aug 17, 2026
Mehdi Bouyakhf President EMEA	90K	$3.8M	0%	0.3%	Jun 5, 2026 to Jun 8, 2026

Sales by month

Month	Sale proceeds	Disclosed plan	To cover taxes	No plan disclosed
Mar 2026	$0	$0	$0	$0
Apr 2026	$0	$0	$0	$0
May 2026	$0	$0	$0	$0
Jun 2026	$3.8M	$0	$0	$3.8M
Jul 2026	$0	$0	$0	$0
Aug 2026	$1.10B	$0	$0	$1.10B
Sep 2026	$0	$0	$0	$0
Oct 2026	$0	$0	$0	$0

Known gaps and uncertainty13 officers and directors not confirmed

Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for Birkenstock Holding plc are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology24 filings on record, 24 filed since March 18, 2026, and how we read them

All 24 Forms 3, 4 and 5 on record for Birkenstock Holding plc (SEC CIK 1977102), filed from Mar 18, 2026 to Oct 2, 2026; 24 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 16, 2026. Prices are the ones reported in each filing, often weighted averages.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (2)No filing in 18 months; last reported balances, not in any total

Name	Last filed	Last reported balance
David Kahan		No balance on record
Volker Bach		No balance on record

Spotted something wrong on this page? Report an error. We check every report against the SEC filing and list what we fix in the corrections log.