ATYR · aTYR PHARMA INC · Short Volume

$0.17 0.00 (-0.58%) At close · Oct 21

Market Cap

$17.33M

98.09M

Volume · Oct 21 1.23M Avg daily vol (3M) 3.25M

Daily short-sale volume published by FINRA from its trade-reporting facilities. It measures how many shares were sold short each day as a share of total volume — a daily flow, not the total outstanding short position.

Pull daily short volume through the short interest API or MCP →

1M 3M 6M 1Y 5Y All

Short Volume

Date	Short Volume	Short Exempt	Total Volume	Short %
2026-10-21	217,528	0	549,939	39.6%
2026-10-20	366,753	208	846,358	43.3%
2026-10-19	698,761	0	1,305,122	53.5%
2026-10-16	391,980	0	1,025,285	38.2%
2026-10-15	430,323	36,249	1,182,129	36.4%
2026-10-14	614,430	20,587	1,460,608	42.1%
2026-10-13	507,385	81,969	1,636,468	31.0%
2026-10-12	629,610	78,614	1,412,410	44.6%
2026-10-09	432,325	26,186	721,391	59.9%
2026-10-08	439,659	21,859	1,135,432	38.7%
2026-10-07	279,570	0	568,879	49.1%
2026-10-06	273,479	200	614,047	44.5%
2026-10-05	383,955	0	930,725	41.3%
2026-10-02	680,874	35,527	1,201,116	56.7%
2026-10-01	705,340	22,740	1,225,837	57.5%
2026-09-30	669,987	114,672	1,211,600	55.3%
2026-09-29	1,195,900	44,672	2,311,883	51.7%
2026-09-28	1,128,659	136,312	2,293,727	49.2%
2026-09-25	1,966,444	284,545	3,629,762	54.2%
2026-09-24	8,907,467	324,273	16,881,257	52.8%
2026-09-23	431,778	37,159	710,608	60.8%
2026-09-22	390,018	3,609	773,212	50.4%
2026-09-21	156,067	0	478,166	32.6%
2026-09-18	491,267	108	765,972	64.1%
2026-09-17	358,711	14,200	651,660	55.0%
2026-09-16	402,597	0	611,976	65.8%
2026-09-15	378,623	17,266	712,501	53.1%
2026-09-14	569,768	20,601	1,023,070	55.7%
2026-09-11	506,510	10	1,054,529	48.0%
2026-09-10	383,527	112	533,047	71.9%
2026-09-09	301,324	15,490	567,609	53.1%
2026-09-08	139,247	0	365,453	38.1%
2026-09-04	49,689	0	143,961	34.5%
2026-09-03	99,006	0	189,125	52.3%
2026-09-02	149,851	12,940	427,046	35.1%
2026-09-01	375,609	24,878	731,216	51.4%
2026-08-31	105,243	190	422,299	24.9%
2026-08-28	68,742	0	120,456	57.1%
2026-08-27	74,878	0	170,830	43.8%
2026-08-26	63,211	0	184,667	34.2%
2026-08-25	98,201	5,690	432,384	22.7%
2026-08-24	112,575	200	308,550	36.5%
2026-08-21	48,482	0	233,704	20.7%
2026-08-20	149,932	1,100	525,660	28.5%
2026-08-19	79,368	279	278,272	28.5%
2026-08-18	228,700	1,231	377,083	60.6%
2026-08-17	155,688	0	389,797	39.9%
2026-08-14	103,243	0	391,359	26.4%
2026-08-13	225,635	21,801	888,405	25.4%
2026-08-12	77,706	800	215,495	36.1%

Showing 1–50 of 65 days

Key facts CIK 1339970 CUSIP 002120202 13F (30d) 9 filings 9 filers Visit website Investor relations