Adam Koppel
Insider
First SEC filing: April 16, 2026 · Latest: April 16, 2026
Insider at
Insider transactions
1 buys (P)
0 sells (S)
Net: $25,000,000
Avg return of open purchases vs now: -32.3%
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| April 20, 2026 | KLRA | C | 16,875,000 | · | · | 16,875,000 Indirect | · | Acquired | (price as of 2026-10-05) |
| April 20, 2026 | KLRA | C | 4,145,768 | · | · | 21,020,768 Indirect | +24.57% | Acquired | (price as of 2026-10-05) |
| April 20, 2026 | KLRA | C | 4,145,768 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| April 20, 2026 | KLRA | C | 16,875,000 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| April 20, 2026 | KLRA | P | 1,562,500 | $16.00 | $25,000,000 | 22,583,268 Indirect | +7.43% | Acquired | -32.3% (price as of 2026-10-05) |
| April 16, 2026 | KLRA | A | 38,300 | · | · | 38,300 Direct | · | Acquired | (price as of 2026-10-05) |
| June 26, 2024 | FHTX | A | 16,000 | $5.52 | $88,320 | 16,000 Direct | · | Acquired | -63.8% (price as of 2026-10-05) |
| Jan. 11, 2024 | SLDB | A | 904,160 | $5.53 | $5,000,005 | 4,034,582 Indirect | +28.88% | Acquired | 27.7% (price as of 2026-10-05) |
| June 21, 2023 | FHTX | A | 16,000 | · | · | 16,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 6, 2023 | SLDB | A | 9,650 | · | · | 9,650 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 13, 2022 | SLDB | A | 9,650 | · | · | 9,650 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 2, 2022 | SLDB | A | 2,666 | · | · | 2,666 Direct | · | Acquired | (price as of 2026-10-05) |
| June 21, 2022 | FHTX | A | 16,000 | · | · | 16,000 Direct | · | Acquired | (price as of 2026-10-05) |
| July 13, 2021 | FHTX | A | 12,530 | · | · | 12,530 Direct | · | Acquired | (price as of 2026-10-05) |
| June 16, 2021 | SLDB | A | 30,000 | · | · | 30,000 Direct | · | Acquired | (price as of 2026-10-05) |
| March 23, 2021 | SLDB | A | 869,565 | $5.75 | $4,999,999 | 7,929,918 Indirect | +12.32% | Acquired | -91.8% (price as of 2026-10-05) |
| Dec. 10, 2020 | SLDB | A | 3,189,189 | $3.70 | $11,799,999 | 7,060,353 Indirect | +82.38% | Acquired | -87.3% (price as of 2026-10-05) |
| June 16, 2020 | SLDB | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 16, 2020 | SLDB | A | 30,000 | · | · | 30,000 Direct | · | Acquired | (price as of 2026-10-05) |
| July 30, 2019 | SLDB | A | 1,881,720 | $4.65 | $8,749,998 | 3,871,164 Indirect | +94.59% | Acquired | -89.9% (price as of 2026-10-05) |
| June 13, 2019 | SLDB | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 13, 2018 | SLDB | A | 8,165 | · | · | 8,165 Direct | · | Acquired | (price as of 2026-10-05) |
| July 25, 2018 | SLDB | A | 1,835 | · | · | 1,835 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 30, 2018 | SLDB | P | 300,000 | $16.00 | $4,800,000 | 1,989,444 Indirect | +17.76% | Acquired | -97.1% (price as of 2026-10-05) |
| Jan. 25, 2018 | SLDB | M | 1,991,097 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| Jan. 25, 2018 | SLDB | M | 1,689,444 | · | · | 1,689,444 Indirect | · | Acquired | (price as of 2026-10-05) |
| Oct. 26, 2017 | SLDB | A | 1,223,240 | · | · | 1,991,097 Indirect | +159.31% | Acquired | (price as of 2026-10-05) |
| Jan. 3, 2017 | PTCT | A | 12,000 | · | · | 12,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 6, 2016 | BIIB | S 10b5-1 | 555 | $290.00 | $160,950 | 2,402 Direct | -18.77% | Disposed | -22.9% (price as of 2026-10-05) |
| June 2, 2016 | BIIB | J | 1,969 | · | · | 3,616 Direct | -35.26% | Disposed | (price as of 2026-10-05) |
| June 2, 2016 | BIIB | M | 1,643 | · | · | 5,585 Direct | -22.73% | Disposed | (price as of 2026-10-05) |
| June 2, 2016 | BIIB | F | 534 | $289.73 | $154,716 | 2,957 Direct | -15.30% | Disposed | -22.8% (price as of 2026-10-05) |
| June 2, 2016 | BIIB | M | 1,643 | · | · | 3,491 Direct | +88.91% | Acquired | (price as of 2026-10-05) |
| April 6, 2016 | BIIB | S 10b5-1 | 102 | $275.00 | $28,050 | 1,848 Direct | -5.23% | Disposed | -18.7% (price as of 2026-10-05) |
| Feb. 23, 2016 | BIIB | J | 597 | · | · | 1,802 Direct | -24.89% | Disposed | (price as of 2026-10-05) |
| Feb. 23, 2016 | BIIB | M | 301 | · | · | 2,399 Direct | -11.15% | Disposed | (price as of 2026-10-05) |
| Feb. 23, 2016 | BIIB | F | 98 | $258.99 | $25,381 | 1,865 Direct | -4.99% | Disposed | -13.7% (price as of 2026-10-05) |
| Feb. 23, 2016 | BIIB | M | 301 | · | · | 1,963 Direct | +18.11% | Acquired | (price as of 2026-10-05) |
| Feb. 22, 2016 | BIIB | A | 7,270 | · | · | 7,270 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 4, 2016 | PTCT | A | 12,000 | · | · | 12,000 Direct | · | Acquired | (price as of 2026-10-05) |
| June 2, 2015 | BIIB | J | 1,228 | · | · | 7,228 Direct | -14.52% | Disposed | (price as of 2026-10-05) |
| June 2, 2015 | BIIB | M | 2,384 | · | · | 8,456 Direct | -21.99% | Disposed | (price as of 2026-10-05) |
| June 2, 2015 | BIIB | F | 852 | $387.62 | $330,252 | 1,662 Direct | -33.89% | Disposed | -42.3% (price as of 2026-10-05) |
| June 2, 2015 | BIIB | M | 2,384 | · | · | 2,514 Direct | +1833.85% | Acquired | (price as of 2026-10-05) |
| Feb. 23, 2015 | BIIB | A | 2,700 | · | · | 2,700 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 2, 2015 | PTCT | A | 12,000 | $51.00 | $612,000 | 12,000 Direct | · | Acquired | 24.8% (price as of 2026-10-05) |
| June 2, 2014 | BIIB | A | 10,840 | · | · | 10,840 Direct | · | Acquired | (price as of 2026-10-05) |
| Jan. 28, 2014 | PTCT | A | 10,000 | $27.05 | $270,500 | 10,000 Direct | · | Acquired | 135.3% (price as of 2026-10-05) |
| June 25, 2013 | PTCT | C | 1,083,333 | · | · | 1,083,333 Indirect | · | Acquired | (price as of 2026-10-05) |
| June 25, 2013 | PTCT | C | 1,083,333 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-05) |
| June 25, 2013 | PTCT | P | 1,250,000 | $15.00 | $18,750,000 | 2,333,333 Indirect | +115.38% | Acquired | 324.3% (price as of 2026-10-05) |
| March 7, 2013 | PTCT | A | 1,083,333 | $12.00 | $12,999,996 | 1,083,333 Indirect | · | Acquired | 430.4% (price as of 2026-10-05) |
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 | Disposed |
| April 20, 2026 | KLRA | Series A-1 Preferred Stock | Common Stock | · | · | 16,875,000 | Disposed |
| April 16, 2026 | KLRA | Stock Option (right to buy) | Common Stock | $16.00 | April 16, 2036 | 38,300 | Acquired |
| June 26, 2024 | FHTX | Stock Options (Right to buy) | Common Stock | $5.52 | June 25, 2034 | 16,000 | Acquired |
| June 21, 2023 | FHTX | Stock Option (right to buy) | Common Stock | $8.70 | June 20, 2033 | 16,000 | Acquired |
| June 6, 2023 | SLDB | Director Stock Option (Right to Buy) | Common Stock | $6.37 | June 6, 2033 | 9,650 | Acquired |
| Dec. 13, 2022 | SLDB | Director Stock Option (Right to Buy) | Common Stock | $6.47 | Dec. 13, 2032 | 9,650 | Acquired |
| Dec. 2, 2022 | SLDB | Director Stock Option (Right to Buy) | Common Stock | $6.77 | Dec. 1, 2032 | 2,666 | Acquired |
| June 21, 2022 | FHTX | Stock Options (Right to buy) | Common Stock | $13.81 | June 20, 2032 | 16,000 | Acquired |
| July 13, 2021 | FHTX | Stock Option (right to buy) | Common Stock | $9.40 | July 12, 2031 | 12,530 | Acquired |
| June 16, 2021 | SLDB | Director Stock Option (Right To Buy) | Common Stock | $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 | $3.03 | June 16, 2030 | 30,000 | Acquired |
| June 13, 2019 | SLDB | Director of Stock Option Right To Buy | Common Stock | $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 | $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 | $11.23 | Jan. 2, 2027 | 12,000 | Acquired |
| June 2, 2016 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | June 2, 2017 | 1,969 | Disposed |
| June 2, 2016 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | June 2, 2017 | 1,643 | Disposed |
| Feb. 23, 2016 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 23, 2018 | 597 | Disposed |
| Feb. 23, 2016 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 23, 2018 | 301 | Disposed |
| Feb. 22, 2016 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 22, 2019 | 7,270 | Acquired |
| Jan. 4, 2016 | PTCT | Stock Option (right to buy) | Common Stock | $30.86 | Jan. 3, 2026 | 12,000 | Acquired |
| June 2, 2015 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | June 2, 2017 | 1,228 | Disposed |
| June 2, 2015 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | June 2, 2017 | 2,384 | Disposed |
| Feb. 23, 2015 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 23, 2018 | 2,700 | Acquired |
| Jan. 2, 2015 | PTCT | Stock Option (right to buy) | Common Stock | $51.00 | Jan. 1, 2025 | 12,000 | Acquired |
| June 2, 2014 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | June 2, 2017 | 10,840 | Acquired |
| Jan. 28, 2014 | PTCT | Stock Option (right to buy) | Common Stock | $27.05 | Jan. 27, 2024 | 10,000 | Acquired |
| June 25, 2013 | PTCT | Series Four Senior Preferred Stock | Common Stock | · | · | 1,083,333 | Disposed |
| March 7, 2013 | PTCT | Series Four Senior Preferred Stock | Common Stock | · | · | 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 | 16,875,000 | Indirect |
| April 16, 2026 | KLRA | Series B Preferred Stock | 4,145,768 | Indirect |
| Dec. 5, 2022 | SLDB | Common Stock | 3,130,423 | Indirect |
| Oct. 22, 2020 | FHTX | Stock Option (Right to Buy) | 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 | · | Direct |
| June 19, 2013 | PTCT | Series Four Senior Preferred Stock | 1,083,333 | Indirect |