It should not have been reported on a Form 1099-NEC, as that is for reporting non-wage income paid to individuals for services provided to a business. Since you sold stock, that should be reported on a Form 1099-B. Since you had a promissory note, the interest on that should be reported on a Form 1099-INT.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"