SEC CIK 1377258

Greenman William Mariner

Reported ownership across 1 company, sourced from SEC Form 4 filings and updated daily.

Current Positions

CompanyShares OwnedAs Of
CERSview stock →5,053,0362026-06-30

Position History — CERS

Reported shares owned immediately after each Form 4 transaction, over time.

01,841,4793,682,9585,524,4372006-092013-012018-092019-092021-082024-032026-06

Recent Filings — CERS

DateActivitySharesPriceOwned After
2026-06-30Open-market sale101,919$2.945,053,036
2026-06-30Grant / award192,500$0.005,154,955
2026-03-12Open-market sale447,757$1.664,998,493
2026-03-06Open-market sale78,187$2.015,446,250
2026-03-05Grant / award193,270$0.005,524,437
2026-03-02Grant / award1,200,000$0.005,331,167
2025-03-14Open-market sale122,827$1.454,115,845
2025-03-13Open-market sale71,086$1.454,238,672
2025-03-07Open-market sale60,984$1.504,309,758
2025-03-06Grant / award975,000$0.004,205,000
2025-03-06Grant / award165,742$0.004,370,742
2025-03-04Open-market sale23,023$1.553,230,000
2025-03-03Option exercise (derivative)57,637—0
2025-03-03Option exercise57,637—3,253,023
2025-02-26Grant / award (derivative)57,637—57,637
2024-03-14Open-market sale63,611$2.023,181,281
2024-03-13Open-market sale62,315$2.063,244,892
2024-03-12Option exercise (derivative)64,666—0
2024-03-12Option exercise64,666—3,307,207
2024-03-01Grant / award575,000$0.003,242,541
2023-03-13Open-market sale37,748$2.802,616,411
2023-03-13Open-market sale22,732$2.802,658,346
2023-03-12Option exercise (derivative)107,525—0
2023-03-12Option exercise (derivative)64,667—64,666
2023-03-12Option exercise64,667—2,681,078
2023-03-12Option exercise107,525—2,654,159
2023-03-01Grant / award575,000$0.002,546,634
2022-03-14Open-market sale78,043$5.041,885,141
2022-03-14Open-market sale53,702$5.041,935,801
2022-03-14Open-market sale33,276$5.041,967,192
2022-03-12Option exercise (derivative)151,666—0
2022-03-12Option exercise (derivative)104,362—107,525
2022-03-12Option exercise (derivative)64,667—129,333
2022-03-12Option exercise104,362—1,989,503
2022-03-12Option exercise64,667—2,000,468
2022-03-12Option exercise151,666—1,963,184
2022-03-01Grant / award (derivative)435,000—435,000
2022-03-01Grant / award217,500$0.001,811,518
2022-02-25Option exercise (derivative)380,000—0
2022-02-25Option exercise380,000$3.751,902,281
2022-02-25Open-market sale215,263$5.691,687,018
2022-02-25Open-market sale93,000$5.731,594,018
2021-08-03Option exercise (derivative)100,000—0
2021-08-03Option exercise100,000$2.081,518,672
2021-04-16Option exercise (derivative)550,000—0
2021-04-16Option exercise550,000$2.701,652,531
2021-04-16Tax withholding233,859$6.351,418,672
2021-03-15Open-market sale76,272$6.381,050,652
2021-03-15Open-market sale27,651$6.38975,257
2021-03-15Open-market sale52,484$6.381,102,531
2021-03-12Option exercise (derivative)104,363—211,887
2021-03-12Option exercise (derivative)151,667—151,666
2021-03-12Option exercise (derivative)71,666—0
2021-03-12Option exercise104,363—1,155,015
2021-03-12Option exercise151,667—1,126,924
2021-03-12Option exercise71,666—1,002,908
2021-03-01Grant / award (derivative)380,000—380,000
2021-03-01Grant / award (derivative)194,000—194,000
2020-08-26Option exercise (derivative)100,000—0
2020-08-26Option exercise100,000$3.00925,849
2020-03-17Open-market sale27,865$3.59743,392
2020-03-17Option exercise71,667—771,257
2020-03-17Open-market sale10,936$3.59699,590
2020-03-17Option exercise28,125—710,526
2020-03-17Open-market sale69,210$3.59825,849
2020-03-17Option exercise151,667—895,059
2020-03-12Option exercise (derivative)71,667—71,666
2020-03-12Option exercise (derivative)28,125—0
2020-03-12Option exercise (derivative)151,667—303,333
2020-03-02Grant / award (derivative)316,250—316,250
2020-03-02Grant / award (derivative)632,500—632,500
2019-09-24Option exercise (derivative)40,000$2.150
2019-09-24Option exercise40,000$2.15678,485
2019-06-06Grant / award (derivative)455,000—455,000
2019-06-04Open-market buy10,000$4.60638,485
2019-04-22Option exercise (derivative)100—0
2019-04-22Option exercise100$1.06628,485
2019-03-13Open-market sale10,619$5.90561,277
2019-03-13Open-market sale27,059$5.90605,885
2019-03-13Open-market sale10,619$5.90583,777
2019-03-13Open-market sale27,059$5.90628,385
2019-03-12Option exercise (derivative)71,667—143,333
2019-03-12Option exercise (derivative)28,125—28,125
2019-03-12Option exercise28,125—571,896
2019-03-12Option exercise71,667—632,944
2019-03-12Open-market sale7,781$6.48543,771
2019-03-12Option exercise (derivative)28,125—28,125
2019-03-12Option exercise (derivative)71,667—143,333
2019-03-12Option exercise71,667—655,444
2019-03-12Open-market sale7,781$6.48566,271
2019-03-12Option exercise28,125—594,396
2019-03-10Option exercise (derivative)22,500—0
2019-03-10Option exercise22,500—551,552
2019-03-10Option exercise (derivative)22,500—0
2019-03-10Option exercise22,500—574,052
2018-12-28Option exercise (derivative)150,000—0
2018-12-28Option exercise150,000$0.79549,601
2018-09-27Option exercise (derivative)40,000—0
2018-09-27Option exercise40,000$4.19399,601
2018-03-13Open-market sale10,031$5.05354,779
2018-03-12Option exercise (derivative)28,125—56,250
2018-03-12Open-market sale7,735$4.80336,685
2018-03-12Option exercise28,125—364,810
2018-03-10Option exercise (derivative)22,500—22,500
2018-03-10Option exercise22,500—344,420
2018-03-01Grant / award (derivative)215,000—215,000
2018-03-01Grant / award (derivative)430,000—430,000
2017-03-15Open-market sale8,786$4.21316,938
2017-03-10Option exercise (derivative)22,500—45,000
2017-03-10Option exercise22,500—325,724
2017-03-01Grant / award (derivative)84,375—84,375
2017-03-01Grant / award (derivative)400,000—400,000
2016-09-30Option exercise (derivative)55,000—0
2016-09-30Option exercise55,000$5.55298,283
2016-03-01Grant / award (derivative)315,000—315,000
2016-03-01Grant / award (derivative)67,500—67,500
2015-03-02Grant / award (derivative)500,000—500,000
2014-11-10Open-market buy9,300$3.90184,595
2014-11-10Open-market buy2,500$3.94175,295
2014-11-10Open-market buy10,000$3.95172,795
2014-05-05Option exercise (derivative)46,500—0
2014-05-05Option exercise46,500$2.28209,295
2014-03-26Option exercise (derivative)50—0
2014-03-26Option exercise50$3.52162,795
2014-03-04Option exercise (derivative)53,500—46,500
2014-03-04Option exercise53,500$2.28162,745
2014-03-03Grant / award (derivative)325,000—325,000
2014-03-03Grant / award (derivative)325,000—325,000
2014-03-03Option exercise (derivative)53,500—46,500
2014-03-03Option exercise53,500$2.28162,745
2013-08-22Option exercise (derivative)17,250$0.000
2013-08-22Option exercise17,250$4.25143,065
2013-03-01Grant / award (derivative)390,000—390,000
2013-01-07J2,866$2.95125,815
2012-11-19Open-market buy3,200$3.02128,681
2012-11-16Open-market buy100$2.82111,781
2012-11-16Open-market buy3,000$2.83114,781
2012-11-16Open-market buy3,900$2.86118,681
2012-11-16Open-market buy3,000$2.84121,681
2012-11-16Open-market buy3,800$2.88125,481
2012-03-01Grant / award (derivative)380,000—380,000
2012-02-29J12,020$1.77111,681
2011-09-01Grant / award (derivative)100,000—100,000
2011-05-03Open-market buy10,000$2.8399,661
2011-04-18Grant / award (derivative)550,000—550,000
2011-01-10J1,672$2.8289,661
2010-09-02———76,026
2010-09-01Grant / award (derivative)100,000—100,000
2010-01-14J1,746$1.7891,333
2010-01-06Grant / award7,589—93,079
2009-10-01Grant / award (derivative)40,000—40,000
2009-04-23Grant / award (derivative)100—100
2009-01-12Grant / award (derivative)150,000—150,000
2008-10-01Grant / award (derivative)40,000—40,000
2008-01-10Grant / award4,506—85,490
2007-10-01Grant / award (derivative)30,000—30,000
2007-01-05Grant / award4,958—4,958
2007-01-05Grant / award4,958—80,984
2006-10-02Grant / award (derivative)55,000—55,000
2006-09-28———76,026

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.