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MICHAEL B SHEFFERY

CIK 1283887 · last filed 2012-05-07

MICHAEL B SHEFFERY is a corporate insider who has filed 10 SEC Form 4 insider transactions across 2 companies since 2008. The most recent filing, for SUPN, was dated May 7, 2012. Across all open-market trades the lifetime net is +$6.7M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $14.1M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$14.05M

Companies

2

Total Filings

10

Lifetime Open-Market Net

$6.70M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
SUPN Director 297,815 $47.19 $14.05M $5.50M 1 2012-05-07
ATHERSYS, INC / NEW (ATHX) Delisted Director 72,557 $0.01 $980 $1.20M 8 2010-06-14

Recent Filings

10 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2012-05-07 SUPN Mixed +3,599,998 $5.50M EDGAR
2010-06-14 ATHERSYS, INC / NEW (ATHX) Delisted Grant (A) — $0 EDGAR
2010-01-12 ATHERSYS, INC / NEW (ATHX) Delisted Other (J) −1,801,228 $0 EDGAR
2009-06-10 ATHERSYS, INC / NEW (ATHX) Delisted Grant (A) — $0 EDGAR
2009-03-18 ATHERSYS, INC / NEW (ATHX) Delisted Buy (P) +162,200 $126.3K EDGAR
2008-06-18 ATHERSYS, INC / NEW (ATHX) Delisted Grant (A) — $0 EDGAR
2008-05-23 ATHERSYS, INC / NEW (ATHX) Delisted Mixed +268,000 $643.2K EDGAR
2008-05-21 ATHERSYS, INC / NEW (ATHX) Delisted Mixed +130,000 $312.0K EDGAR
2008-05-15 ATHERSYS, INC / NEW (ATHX) Delisted Mixed +50,000 $120.0K EDGAR
2007-06-12 — Mixed +3,000,000 $15.00M
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.