Adam Koppel
CIK 1578965 · View on SEC EDGAR ↗
Insider
First SEC filing: April 16, 2026 · Latest: April 16, 2026
On this page
Insider at
Insider transactions
1 buys (P)
0 sells (S)
Net:
$25,000,000
+ 43 non-open-market transactions below
Avg return of open purchases vs now:
11.8%
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
43 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| April 20, 2026 | KLRA | P | 1,562,500 | $16.00 | $25,000,000 | 22,583,268 Indirect | +7.43% | Acquired | 11.8% (price as of 2026-08-20) |
| Jan. 30, 2018 | SLDB | P | 300,000 | $16.00 | $4,800,000 | 1,989,444 Indirect | +17.76% | Acquired | -96.1% (price as of 2026-08-20) |
| June 6, 2016 | BIIB | S 10b5-1 | 555 | $290.00 | $160,950 | 2,402 Direct | -18.77% | Disposed | -24.1% (price as of 2026-08-20) |
| April 6, 2016 | BIIB | S 10b5-1 | 102 | $275.00 | $28,050 | 1,848 Direct | -5.23% | Disposed | -20.0% (price as of 2026-08-20) |
| June 25, 2013 | PTCT | P | 1,250,000 | $15.00 | $18,750,000 | 2,333,333 Indirect | +115.38% | Acquired | 386.3% (price as of 2026-08-20) |
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 |
|---|---|---|---|---|---|---|---|
| April 20, 2026 | KLRA | Series B Preferred Stock | Common Stock (4,145,768) | — | — | 4,145,768 | Disposed |
| April 20, 2026 | KLRA | Series A-1 Preferred Stock | Common Stock (16,875,000) | — | — | 16,875,000 | Disposed |
| April 16, 2026 | KLRA | Stock Option (right to buy) | Common Stock (38,300) | $16.00 | April 16, 2036 | 38,300 | Acquired |
| June 6, 2023 | SLDB | Director Stock Option (Right to Buy) | Common Stock (9,650) | $6.37 | June 6, 2033 | 9,650 | Acquired |
| Dec. 13, 2022 | SLDB | Director Stock Option (Right to Buy) | Common Stock (9,650) | $6.47 | Dec. 13, 2032 | 9,650 | Acquired |
| Dec. 2, 2022 | SLDB | Director Stock Option (Right to Buy) | Common Stock (2,666) | $6.77 | Dec. 1, 2032 | 2,666 | Acquired |
| June 16, 2021 | SLDB | Director Stock Option (Right To Buy) | Common Stock (30,000) | $3.94 | June 16, 2031 | 30,000 | Acquired |
| June 16, 2020 | SLDB | Director Stock Option (Right To Buy) | Common Stock | $3.03 | June 16, 2030 | 10,000 | Acquired |
| June 16, 2020 | SLDB | Director Stock Option (Right To Buy) | Common Stock (30,000) | $3.03 | June 16, 2030 | 30,000 | Acquired |
| June 13, 2019 | SLDB | Director of Stock Option Right To Buy | Common Stock (10,000) | $5.26 | June 13, 2029 | 10,000 | Acquired |
| Dec. 13, 2018 | SLDB | Director Stock Option (Right to Buy) | Common Stock | $23.58 | Dec. 13, 2028 | 8,165 | Acquired |
| July 25, 2018 | SLDB | Director Stock Option (Right to Buy) | Common Stock (1,835) | $37.89 | July 25, 2028 | 1,835 | Acquired |
| Jan. 25, 2018 | SLDB | LLC Units | Common Stock | — | — | 1,991,097 | Disposed |
| Oct. 26, 2017 | SLDB | LLC Units | Common Stock | — | — | 1,223,240 | Acquired |
| Jan. 3, 2017 | PTCT | Stock Option (Right To Buy) | Common Stock (12,000) | $11.23 | Jan. 2, 2027 | 12,000 | Acquired |
| June 2, 2016 | BIIB | Restricted Stock Unit | Common Stock (1,969) | $0.00 | June 2, 2017 | 1,969 | Disposed |
| June 2, 2016 | BIIB | Restricted Stock Unit | Common Stock (1,643) | $0.00 | June 2, 2017 | 1,643 | Disposed |
| Feb. 23, 2016 | BIIB | Restricted Stock Unit | Common Stock (597) | $0.00 | Feb. 23, 2018 | 597 | Disposed |
| Feb. 23, 2016 | BIIB | Restricted Stock Unit | Common Stock (301) | $0.00 | Feb. 23, 2018 | 301 | Disposed |
| Feb. 22, 2016 | BIIB | Restricted Stock Unit | Common Stock (7,270) | $0.00 | Feb. 22, 2019 | 7,270 | Acquired |
| Jan. 4, 2016 | PTCT | Stock Option (right to buy) | Common Stock (12,000) | $30.86 | Jan. 3, 2026 | 12,000 | Acquired |
| June 2, 2015 | BIIB | Restricted Stock Unit | Common Stock (1,228) | $0.00 | June 2, 2017 | 1,228 | Disposed |
| June 2, 2015 | BIIB | Restricted Stock Unit | Common Stock (2,384) | $0.00 | June 2, 2017 | 2,384 | Disposed |
| Feb. 23, 2015 | BIIB | Restricted Stock Unit | Common Stock (2,700) | $0.00 | Feb. 23, 2018 | 2,700 | Acquired |
| Jan. 2, 2015 | PTCT | Stock Option (right to buy) | Common Stock (12,000) | $51.00 | Jan. 1, 2025 | 12,000 | Acquired |
| June 2, 2014 | BIIB | Restricted Stock Unit | Common Stock (10,840) | $0.00 | June 2, 2017 | 10,840 | Acquired |
| Jan. 28, 2014 | PTCT | Stock Option (right to buy) | Common Stock (10,000) | $27.05 | Jan. 27, 2024 | 10,000 | Acquired |
| June 25, 2013 | PTCT | Series Four Senior Preferred Stock | Common Stock (1,083,333) | — | — | 1,083,333 | Disposed |
| March 7, 2013 | PTCT | Series Four Senior Preferred Stock | Common Stock (1,083,333) | — | — | 1,083,333 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 8 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| April 16, 2026 | KLRA | Series A-1 Preferred Stock→ Common Stock (16,875,000) | 16,875,000 | Indirect |
| April 16, 2026 | KLRA | Series B Preferred Stock→ Common Stock (4,145,768) | 4,145,768 | Indirect |
| Dec. 5, 2022 | SLDB | Common Stock | 3,130,423 | Indirect |
| Oct. 22, 2020 | FHTX | Stock Option (Right to Buy)→ Common Stock (94,594) | 94,594 | Direct |
| Jan. 25, 2018 | SLDB | Common Stock | 1,689,444 | Indirect |
| May 15, 2014 | BIIB | Common Stock | 0 | Direct |
| Feb. 11, 2014 | PTCT | Stock Option→ Common Stock | — | Direct |
| June 19, 2013 | PTCT | Series Four Senior Preferred Stock→ Common Stock (1,083,333) | 1,083,333 | Indirect |