Muktikopanishad list the following ten as principal Upanishads which have received attention from Shri Adi Shankaracharya in form of his bhasyas.<ref name=":4" /><blockquote>ईश-केन-कठ-प्रश्न-मुण्ड-माण्डूक्य-तित्तिरः । एेतरेयं च छान्दोग्यं बृहदारण्यकं तथा ॥</blockquote><blockquote>''īśa-kēna-kaṭha-praśna-muṇḍa-māṇḍūkya-tittiraḥ । ēētarēyaṁ ca chāndōgyaṁ br̥hadāraṇyakaṁ tathā ॥''</blockquote>
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Muktikopanishad list the following ten as principal Upanishads which have received attention from Shri Adi Shankaracharya in form of his bhasyas.<ref name=":4" /><blockquote>ईश-केन-कठ-प्रश्न-मुण्ड-माण्डूक्य-तित्तिरः । एेतरेयं च छान्दोग्यं बृहदारण्यकं तथा ॥ ''īśa-kēna-kaṭha-praśna-muṇḍa-māṇḍūkya-tittiraḥ । ēētarēyaṁ ca chāndōgyaṁ br̥hadāraṇyakaṁ tathā ॥''</blockquote>The 10 Mukhya Upanishad on which Adi Shankaracharya commented are:
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The 10 Mukhya Upanishad on which Adi Sankara commented are: