🕵️ Cerus Corp ($CERS)

SEC insider & ownership activity, last 12 months · CIK 1020214 · every row links its SEC filing

Over the last 12 months insiders sold $3.3M with no open-market buying against it. Greenman William Mariner sold $1.2M through a 10b5-1 trading plan in 3 lots (Mar–Jun). ARK Investment Management LLC added 9.8% → 11.2%. No red-flag 8-Ks in the window.

🚨 2 signals active — planned-vs-executed verdicts, pre-event flags, and cluster context live in the API and the alerts bot.
Oct 2025: net +$0 Nov 2025: net -$94K Dec 2025: net +$0 Jan 2026: net +$0 Feb 2026: net +$0 Mar 2026: net -$2.1M Apr 2026: net +$0 May 2026: net -$100K Jun 2026: net -$648K Jul 2026: net -$53K Aug 2026: net -$90K Sep 2026: net +$0
Monthly net open-market insider flow, last 12 months (up = net buying)

Insider flow

0 buyers, $0 (0 lots) · 6 sellers, $3.3M (23 lots)

InsiderBuysBoughtSellsSoldLast
Greenman William Mariner0 3$1.2MJun 30, 2026
Vivek K. Jayaraman0 6$619KJul 16, 2026
Jensen Chrystal0 5$504KAug 17, 2026
Green Kevin Dennis0 4$480KJun 30, 2026
Richard J. Benjamin0 4$420KMar 12, 2026
Eric Bjerkholt0 1$53KJun 9, 2026

5%+ holders

HolderStakeClassScheduleEvent
ARK Investment Management LLC 11.2% 13GFeb 14, 2025 filing ↗
ARK Investment Management LLC 8.9% 13GAug 14, 2026 filing ↗
Catherine D. Wood 8.9% 13GAug 14, 2026 filing ↗

Planned insider sales (Form 144)

SellerPlannedApprox. sale date
Chrystal Nikole Jensen$90KAug 17, 2026 filing ↗
Vivek K. Jayaraman$53KJul 16, 2026 filing ↗
Eric Bjerkholt$53KJun 9, 2026 filing ↗
Vivek K. Jayaraman$50KMay 29, 2026 filing ↗
Richard J. Benjamin$215KMay 1, 2026 filing ↗
Vivek K. Jayaraman$50KMay 1, 2026 filing ↗
Richard J. Benjamin$76KMar 9, 2026 filing ↗
Kevin D. Green$114KMar 5, 2026 filing ↗
Richard J. Benjamin$126KMar 5, 2026 filing ↗
Chrystal Nikole Jensen$94KNov 24, 2025 filing ↗

Material events (8-K)

ItemEvent date
Earnings (2.02)Jul 30, 2026 filing ↗
Financial Statements and Exhibits (9.01)Jul 30, 2026 filing ↗
Officer/director changes (5.02)Jul 6, 2026 filing ↗
Material agreement (1.01)Jun 5, 2026 filing ↗
Agreement terminated (1.02)Jun 5, 2026 filing ↗
New financial obligation (2.03)Jun 5, 2026 filing ↗
Officer/director changes (5.02)Jun 2, 2026 filing ↗
Shareholder vote (5.07)Jun 2, 2026 filing ↗
Earnings (2.02)Apr 30, 2026 filing ↗
Financial Statements and Exhibits (9.01)Apr 30, 2026 filing ↗
Officer/director changes (5.02)Apr 17, 2026 filing ↗
Officer/director changes (5.02)Mar 11, 2026 filing ↗
Financial Statements and Exhibits (9.01)Mar 11, 2026 filing ↗
Earnings (2.02)Mar 2, 2026 filing ↗
Financial Statements and Exhibits (9.01)Mar 2, 2026 filing ↗
Officer/director changes (5.02)Jan 19, 2026 filing ↗
Earnings (2.02)Jan 11, 2026 filing ↗
Financial Statements and Exhibits (9.01)Jan 11, 2026 filing ↗
Earnings (2.02)Nov 6, 2025 filing ↗
Financial Statements and Exhibits (9.01)Nov 6, 2025 filing ↗