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| Permian Basin Royalty Trust Financial Statements Condensed Statements of Assets , Liabilities and Trust Corpus September 30 , December 31 , 2021 ( Unaudited ) 2020 $ 2,178,062 $ 1,725,449 Permian Basin Royalty Trust Assets Cash and short - term investments . Net overriding royalty interests in producing oil and gas properties ( net of accumulated amortization of $ 10,627,973 and $ 10,592,340 at September 30 , 2021 and December 31 , 2020 , respectively ) TOTAL ASSETS . Liabilities and Trust Corpus Distribution payable to Unit Holders . Commitments and reserves for contingencies . Trust corpus - 46,608,796 Units of beneficial interest authorized and outstanding .. TOTAL LIABILITIES AND TRUST CORPUS 347,243 $ 2,525,305 $ 1,078,062 1,100,000 382,876 $ 2,108,325 $ 625,449 1,100,000 347,243 $ 2,525,305 382,776 $ 2,108,325 Condensed Statements of Distributable Income ( Unaudited ) Royalty income . Interest income Reserve for expenses . General and administrative expenditures ...... Distributable income . Three Months Ended Sept. 30 , Nine Months Ended Sept. 30 , 2020 2021 2020 2021 $ 3,344,086 $ 1,358,890 $ 8,409,389 $ 10,059,901 1,273 1,280 3,859 8,064 3,345,359 1,360,120 8,413,247 10,067,965 50,000 ( 361,096 ) ( 105,830 ) ( 931,140 ) ( 905,281 ) $ 2,984,263 $ 1,254,340 $ 7,482,108 $ 9,112,684 Distributable income per Unit ( 46,608,796 Units ) $ .06 $ .03 $ .16 $ .20 Condensed Statements of Changes in Trust Corpus ( Unaudited ) Three Months Ended Sept. 30 , Nine Months Ended Sept. 30 , 2021 Trust Corpus , beginning of period .. Amortization of net overriding royalty interests .. Distributable income .. 2020 2021 2020 $ 361,333 $ 402,180 $ 382,876 $ 424,507 ( 14,090 ) ( 12,740 ) ( 35,633 ) ( 35,067 ) 2,984,263 1,254,340 7,482,108 9,122,684 ( 2,984,263 ) ( 1,254,340 ) ( 7,482,108 ) ( 9,122,684 ) $ 347,243 $ 389,440 $ 347,243 $ 389,440 Distributions declared . Trust Corpus , end of period Distributions per Unit . $ .06 $ .03 $ .16 $ .20 3rd Quarter Report 2021