Historic short interest:
Thanks for the reminder Red...
You can go to this link to check short interest in a stock:
http://nasdaqtrader.com/Trader.aspx?id=ShortInterest
Publication schedule is here:
http://nasdaqtrader.com/Trader.aspx?id=ShortIntPubSch
Dicerna Pharmaceuticals, Inc. - Common Stock
Settlement Date Short Interest Percent Change
Average Daily Share Volume Days to Cover
09/15/2021 4,126,869 0.11 914,655 4.51
08/31/2021 4,122,137 (19.29) 1,163,697 3.54
08/13/2021 5,107,461 9.86 1,938,271 2.64
07/30/2021 4,649,214 (2.20) 630,504 7.37
07/15/2021 4,753,763 19.05 742,954 6.40
06/30/2021 3,993,134 (19.41) 794,900 5.02
06/15/2021 4,954,651 (2.49) 703,160 7.05
05/28/2021 5,080,919 (8.42) 652,085 7.79
05/14/2021 5,547,789 (2.95) 669,937 8.28
04/30/2021 5,716,157 2.64 604,337 9.46
04/15/2021 5,569,312 4.58 510,702 10.91
03/31/2021 5,325,524 3.22 839,178 6.35
03/15/2021 5,159,496 3.86 908,857 5.68
02/26/2021 4,967,839 7.46 657,667 7.55
02/12/2021 4,622,947 (4.76) 631,608 7.32
01/29/2021 4,854,056 (0.06) 814,938 5.96
01/15/2021 4,856,795 (6.76) 685,284 7.09
12/31/2020 5,208,863 (11.94) 620,536 8.39
12/15/2020 5,915,239 1.85 692,346 8.54
11/30/2020 5,807,929 0.68 382,409 15.19
11/13/2020 5,768,562 (0.36) 564,424 10.22
10/30/2020 5,789,376 24.06 602,784 9.60
10/15/2020 4,666,501 (1.74) 428,490 10.89
09/30/2020 4,749,326 22.31 525,176 9.04