Euronext Amsterdam

Avantium N.V.

Basic MaterialsLEI 724500E5WW4731JJ4G46Filings at the AFM Nederlands

At a glance

Most recent filing on November 3, 2026 — a sale by Aken, van T.B. on Oct 30, 2026.

Over the past 12 months: 0 open-market purchases and 1 open-market sale.

We hold 174 visible filings, going back to March 16, 2017.

Filings we could not classify with confidence are set aside for review, so they are in none of these counts.

Insider trades

What is a MAR filing?

5 of 174 shown

This page is free to read, and it stops after 5 rows. Those are the 5 most recent filings for this company, out of 174. Reading the whole list, and the full filer page behind every line, is part of the subscription. So are the insider score for this company, the price beside each line, the price history with every buy marked on it, any moments when several insiders bought within ninety days, and following this company. What that costs is on the pricing page. Already subscribed? Sign in and this page opens in full.

Some of these filings come from the AFM register of board members and supervisory directors (art. 5:48 Wft). The AFM board-member register gives no transaction type; we derive it from the number of shares and the price.

Aken, van T.B. Board or supervisory board member
€57,623Open-market sale
TradedOct 30, 2026FiledNov 3, 2026
Portocarero General counsel
12,500 sharesGrant
TradedJan 23, 2026FiledJan 28, 2026
Jansen M. Chief commercial officer
10,000 sharesGrant
TradedJan 23, 2026FiledJan 28, 2026
Aken, van T.B. Board or supervisory board member
€37,200Open-market buy
TradedSep 30, 2025FiledSep 30, 2025
Björkman N. Board or supervisory board member
€37,897Open-market buy
TradedSep 22, 2025FiledSep 22, 2025

Short positions

All short positions

Net short positions of 0.5% or more in Avantium N.V. that are open today, as the regulator publishes them. Together they come to 3.41% of the shares. Positions below 0.5% are not published, so the real total can be higher.

3 open positions, together 3.41%. The holders and their history are part of the subscription.

Source: Autoriteit Financiële Markten (AFM), register of net short positions, as published on November 9, 2026.

The insider score is a rank of the most recent scored buy, not a forecast. How it is calculated is in the methodology. Source: the Dutch AFM register (MAR art. 19).