It is well known throughout the world of shareholding disclosure that the 13F list provided by the SEC does not come in a user-friendly format.

However, via smart technology, this is a problem that we have managed here at FundApps. All FundApps users can benefit from the list being automatically sourced and formatted.

Complexity arises in regards to the CUSIPs related to options listed on the 13F list, as the option CUSIPs do not reflect actual CUSIPs. This article describes how FundApps matches CUSIPs for options that are disclosable under schedule 13F. In summary, the 13F rule code checks whether an option's underlying security is disclosable and uses that as the basis for inclusion in the results.

First things first. Below is a small section of the 13F list, displaying all disclosable assets related to EURONAV NV.

The * indicates that options relating to shares of EURONAV NV are also disclosable under 13F.

The problem that FundApps faces when trying to match CUSIPs provided by our customers is that some CUSIPs on the list do not reflect CUSIPs that actually exist on the market. This is the case for all options on the list.

This is unfortunate since we can't rely on our customers to be able to provide these "fake" CUSIPs for their options positions. So how do we deal with this issue?

The first thing we do is filter the 13F list for all CUSIPs where options also must be disclosed. This filtering produces a list called US13FOptions that looks like the following and includes all equity CUSIPs with an * attached.

To ensure that FundApps correctly performs the 13F check, you are only required to provide the actual CUSIPs of the underlying equity of options listed on the official 13F list; everything else is taken care of by FundApps.