This article explains how to resolve inflated holding percentages for Major: Netherlands - Nominal Share Capital results caused by ParValue mismatches. It details why these discrepancies occur during calculations and how to update position data to correct them.

If your Dutch holding percentage appears to be ten times too high, the issue typically stems from a decimal or unit mismatch in the position's ParValue (for example, entering "1" instead of "0.10").

For Dutch issuers, the disclosure rule isn't based on the number of shares held but on the share of the issuer's total issued nominal capital (a currency value), not the total share count.

To work this out, the rule's engine calculates:

ParValue is the nominal value stated on each share certificate, and it feeds directly into the numerator of that calculation. If ParValue is off by a factor of 10 (entered as 1 when the actual nominal value is 0.10), the numerator, and therefore the resulting percentage, will also be inflated by roughly 10x.

This is easy to miss because TotalIssuedNominalCapital for Dutch issuers is usually pulled in automatically and correctly from the AFM via the Global Company Database (GCD), so it's easy to assume the numbers must be right on the other side of the equation.

But ParValue is not auto-matched by the system because the regulator doesn't provide a security identifier we can use for matching. This means it must always be supplied in the positions file.