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Ridgeback Capital Management LP

CIK 1357610 · last filed 2011-06-27

Ridgeback Capital Management LP is a corporate insider who has filed 10 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing shows the insider sold $24.3M of IRWD on Jun 27, 2011. Across all open-market trades the lifetime net is −$981.0K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $37.5M 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

$37.48M

Companies

3

Total Filings

10

Lifetime Open-Market Net

-$981.0K

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
IRWD 10%+ Owner 9,889,262 $3.79 $37.48M -$24.29M 1 2011-06-27
SEQUENOM INC (SQNM) Delisted 10%+ Owner 8,189,878 — — $23.30M 8 2009-05-01
Theriva Biologics, Inc. (PP) Delisted 10%+ Owner 1,856,565 $26.10 $48.46M $0 1 2007-11-13

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
2011-06-27 IRWD Sell (S) −1,500,000 -$24.29M EDGAR
2009-05-01 SEQUENOM INC (SQNM) Delisted Sell (S) −15,241,386 -$64.07M EDGAR
2008-08-12 SEQUENOM INC (SQNM) Delisted Buy (P) +630,000 $11.96M EDGAR
2008-08-11 SEQUENOM INC (SQNM) Delisted Buy (P) +735,000 $14.68M EDGAR
2008-08-08 SEQUENOM INC (SQNM) Delisted Buy (P) +409,797 $8.19M EDGAR
2008-08-07 SEQUENOM INC (SQNM) Delisted Buy (P) +300,000 $6.12M EDGAR
2008-08-04 SEQUENOM INC (SQNM) Delisted Buy (P) +300,000 $6.29M EDGAR
2008-07-02 SEQUENOM INC (SQNM) Delisted Buy (P) +1,140,000 $18.20M EDGAR
2008-06-30 SEQUENOM INC (SQNM) Delisted Buy (P) +1,440,000 $21.94M EDGAR
2007-11-13 Theriva Biologics, Inc. (PP) Delisted Exer (X) +1,856,565 $1.37M EDGAR
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.