Erik G Birkerts
CIK 1418578 · View on SEC EDGAR ↗
Insider
First SEC filing: Dec. 18, 2007 · Latest: Dec. 18, 2007
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 2 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
2 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 20, 2008 | OESX | S | 600 | $3.01 | $1,806 | 1,400 Direct | -30.00% | Disposed | -36.6% (price as of 2026-08-21) |
| Dec. 24, 2007 | OESX | P | 1,000 | $13.00 | $13,000 | 1,000 Indirect | — | Acquired | -85.3% (price as of 2026-08-21) |
| Dec. 24, 2007 | OESX | P | 2,000 | $13.00 | $26,000 | 2,000 Direct | — | Acquired | -85.3% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| May 19, 2009 | OESX | Stock Options (right to buy) | Common Stock (11,759) | $3.78 | May 19, 2019 | 11,759 | Acquired |
| Aug. 8, 2008 | OESX | Stock Options (right to buy) | Common Stock (16,502) | $5.35 | Aug. 8, 2018 | 16,502 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Dec. 18, 2007 | OESX | Stock Options (right to buy)→ Common Stock (75,000) | 75,000 | Direct |