CIEN

Ciena Corp

Company with tickers: CIEN

CIK

936395

CUSIP

171779309

Shares Outstanding

141,398,427

13F Activity (30d)

849 filings 829 filers

Short Volume (Last 90 Days)

Date	Short Volume	Short Exempt	Total Volume	Short %
2026-05-27	202,185	1,025	675,427	29.9%
2026-05-26	217,987	15,896	594,874	36.6%
2026-05-22	193,167	10	691,547	27.9%
2026-05-21	218,997	293	625,679	35.0%
2026-05-20	281,179	120	911,683	30.8%
2026-05-19	197,328	211	1,012,166	19.5%
2026-05-18	235,105	1,219	1,208,276	19.5%
2026-05-15	189,109	2,867	877,433	21.6%
2026-05-14	176,701	820	468,642	37.7%
2026-05-13	114,988	119	465,508	24.7%
2026-05-12	206,561	585	679,242	30.4%
2026-05-11	294,374	298	863,826	34.1%
2026-05-08	235,426	18,436	611,509	38.5%
2026-05-07	558,109	8,895	1,397,861	39.9%
2026-05-06	625,098	650	992,132	63.0%
2026-05-05	338,604	85,474	637,824	53.1%
2026-05-04	213,884	105	532,091	40.2%
2026-05-01	376,413	64	807,447	46.6%
2026-04-30	530,713	899	1,044,687	50.8%
2026-04-29	205,901	782	757,833	27.2%
2026-04-28	291,683	34,022	1,229,368	23.7%
2026-04-27	247,773	65	795,056	31.2%
2026-04-24	256,049	1,347	592,192	43.2%
2026-04-23	440,630	581	1,070,529	41.2%
2026-04-22	497,958	5,346	1,381,357	36.0%
2026-04-21	311,184	450	907,318	34.3%
2026-04-20	262,458	948	611,688	42.9%
2026-04-17	418,454	579	741,239	56.5%
2026-04-16	556,326	107	1,153,899	48.2%
2026-04-15	458,703	2,632	1,168,322	39.3%
2026-04-14	454,690	2,296	1,505,482	30.2%
2026-04-13	483,428	1,154	1,412,589	34.2%
2026-04-10	731,873	5	1,178,076	62.1%
2026-04-09	875,621	2,112	1,631,920	53.7%
2026-04-08	1,038,983	129	1,743,361	59.6%
2026-04-07	424,686	0	849,892	50.0%
2026-04-06	480,828	51	843,952	57.0%