Michael Lytton
CIK 1286396 · View on SEC EDGAR ↗
Insider
First SEC filing: April 22, 2009 · Latest: April 22, 2009
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 4 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 2, 2010 | BIIB | F | 1,123 | $57.31 | $64,359 | 18,869 Direct | -5.62% | Disposed | 281.6% (price as of 2026-08-19) |
| March 2, 2010 | BIIB | F | 1,112 | $57.31 | $63,729 | 19,992 Direct | -5.27% | Disposed | 281.6% (price as of 2026-08-19) |
| March 2, 2010 | BIIB | A | 10,499 | — | — | 21,104 Direct | +99.00% | Acquired | (price as of 2026-08-19) |
| Feb. 23, 2010 | BIIB | A | 17,123 | — | — | 17,123 Direct | — | Acquired | (price as of 2026-08-19) |
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 |
|---|---|---|---|---|---|---|---|
| Feb. 23, 2010 | BIIB | Restricted Stock Unit | Common Stock (17,123) | — | Feb. 23, 2014 | 17,123 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.