Removing a holding deletes it along with all its trades and dividends. Same on iOS and Android.
Delete A Holding
Open the holding you want to remove.
Tap the ⋯ button in the top-right of the header.
The options menu appears with actions such as Rename, Settings, Move to Portfolio and Delete (the exact list depends on the holding — Move to Portfolio only shows if you have more than one portfolio).
Tap Delete.
A confirmation dialog appears:
Delete Holding — Are you sure? This will delete all trades and dividends associated with this holding.
Tap Delete to remove it, or Cancel to keep it.
After deleting you'll see a "Holding deleted" confirmation, return to the previous screen, and your portfolio totals update.
Warning: This can't be undone. Deleting a holding also deletes every trade and dividend recorded against it.
Tip: To move a holding to another portfolio instead of removing it, use Move to Portfolio from the same ⋯ menu — that keeps all its trades and dividends.