Stuart A Kingsley
Insider
First SEC filing: Jan. 7, 2026 · Latest: Jan. 7, 2026
Insider at
Insider transactions
1 buys (P)
0 sells (S)
Net: $29,948
Avg return of open purchases vs now: 13.3%
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 |
|---|---|---|---|---|---|---|---|---|---|
| May 13, 2026 | INDV | A | 6,518 | · | · | 12,100 Direct | +116.77% | Acquired | (price as of 2026-10-05) |
| March 6, 2026 | INDV | P | 940 | $31.86 | $29,948 | 5,582 Direct | +20.25% | Acquired | 13.3% (price as of 2026-10-05) |
| Jan. 26, 2026 | INDV | A | 3,722 | · | · | 4,642 Direct | +404.57% | Acquired | (price as of 2026-10-05) |
| Feb. 1, 2021 | SRRK | A | 140,000 | · | · | 590,000 Direct | +31.11% | Acquired | (price as of 2026-10-05) |
| Feb. 1, 2021 | SRRK | A | 42,000 | · | · | 42,000 Direct | · | Acquired | (price as of 2026-10-05) |
| July 16, 2020 | SRRK | A | 429,684 | · | · | 429,684 Direct | · | Acquired | (price as of 2026-10-05) |
| May 20, 2020 | SRRK | A | 20,316 | · | · | 20,316 Direct | · | Acquired | (price as of 2026-10-05) |
| June 8, 2018 | TARA | A | 12,700 | · | · | 12,700 Direct | · | Acquired | (price as of 2026-10-05) |
| June 20, 2017 | TARA | A | 6,666 | · | · | 6,666 Direct | · | Acquired | (price as of 2026-10-05) |
| June 9, 2016 | TARA | A | 6,666 | · | · | 6,666 Direct | · | Acquired | (price as of 2026-10-05) |
| Oct. 16, 2015 | TARA | A | 13,333 | · | · | 13,333 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 23, 2015 | BIIB | A | 6,220 | · | · | 6,220 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 12, 2015 | BIIB | J | 867 | · | · | 4,448 Direct | -16.31% | Disposed | (price as of 2026-10-05) |
| Feb. 12, 2015 | BIIB | M | 1,355 | · | · | 5,315 Direct | -20.31% | Disposed | (price as of 2026-10-05) |
| Feb. 12, 2015 | BIIB | M | 2,246 | · | · | 4,495 Direct | -33.32% | Disposed | (price as of 2026-10-05) |
| Feb. 12, 2015 | BIIB | F | 639 | $392.11 | $250,558 | 8,132 Direct | -7.29% | Disposed | -43.5% (price as of 2026-10-05) |
| Feb. 12, 2015 | BIIB | M | 1,355 | · | · | 8,771 Direct | +18.27% | Acquired | (price as of 2026-10-05) |
| Feb. 12, 2015 | BIIB | F | 1,058 | $392.11 | $414,852 | 7,416 Direct | -12.49% | Disposed | -43.5% (price as of 2026-10-05) |
| Feb. 12, 2015 | BIIB | M | 2,246 | · | · | 8,474 Direct | +36.06% | Acquired | (price as of 2026-10-05) |
| Feb. 9, 2015 | BIIB | M | 1,824 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Feb. 9, 2015 | BIIB | F | 860 | $396.88 | $341,317 | 6,228 Direct | -12.13% | Disposed | -44.2% (price as of 2026-10-05) |
| Feb. 9, 2015 | BIIB | M | 1,824 | · | · | 7,088 Direct | +34.65% | Acquired | (price as of 2026-10-05) |
| Feb. 8, 2015 | BIIB | M | 2,636 | · | · | 2,639 Direct | -49.97% | Disposed | (price as of 2026-10-05) |
| Feb. 8, 2015 | BIIB | F | 883 | $402.00 | $354,966 | 5,264 Direct | -14.36% | Disposed | -44.9% (price as of 2026-10-05) |
| Feb. 8, 2015 | BIIB | M | 2,636 | · | · | 6,147 Direct | +75.08% | Acquired | (price as of 2026-10-05) |
| March 11, 2014 | BIIB | S 10b5-1 | 1,187 | $336.78 | $399,758 | 3,511 Direct | -25.27% | Disposed | -34.2% (price as of 2026-10-05) |
| March 11, 2014 | BIIB | S 10b5-1 | 1,393 | $336.30 | $468,466 | 4,698 Direct | -22.87% | Disposed | -34.2% (price as of 2026-10-05) |
| March 11, 2014 | BIIB | S 10b5-1 | 963 | $337.21 | $324,733 | 6,091 Direct | -13.65% | Disposed | -34.3% (price as of 2026-10-05) |
| March 11, 2014 | BIIB | S 10b5-1 | 2,000 | $337.74 | $675,480 | 7,054 Direct | -22.09% | Disposed | -34.4% (price as of 2026-10-05) |
| March 11, 2014 | BIIB | S 10b5-1 | 2,885 | $336.34 | $970,341 | 9,054 Direct | -24.16% | Disposed | -34.2% (price as of 2026-10-05) |
| Feb. 12, 2014 | BIIB | A | 6,670 | · | · | 6,670 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 12, 2014 | BIIB | M | 2,246 | · | · | 6,741 Direct | -24.99% | Disposed | (price as of 2026-10-05) |
| Feb. 12, 2014 | BIIB | F | 1,059 | $323.04 | $342,099 | 11,939 Direct | -8.15% | Disposed | -31.4% (price as of 2026-10-05) |
| Feb. 12, 2014 | BIIB | M | 2,246 | · | · | 12,998 Direct | +20.89% | Acquired | (price as of 2026-10-05) |
| Feb. 9, 2014 | BIIB | M | 1,824 | · | · | 1,824 Direct | -50.00% | Disposed | (price as of 2026-10-05) |
| Feb. 9, 2014 | BIIB | F | 861 | $315.54 | $271,680 | 10,752 Direct | -7.41% | Disposed | -29.8% (price as of 2026-10-05) |
| Feb. 9, 2014 | BIIB | M | 1,824 | · | · | 11,613 Direct | +18.63% | Acquired | (price as of 2026-10-05) |
| Feb. 8, 2014 | BIIB | M | 2,636 | · | · | 5,275 Direct | -33.32% | Disposed | (price as of 2026-10-05) |
| Feb. 8, 2014 | BIIB | F | 1,243 | $315.54 | $392,216 | 9,789 Direct | -11.27% | Disposed | -29.8% (price as of 2026-10-05) |
| Feb. 8, 2014 | BIIB | M | 2,636 | · | · | 11,032 Direct | +31.40% | Acquired | (price as of 2026-10-05) |
| Feb. 1, 2014 | BIIB | M | 4,586 | · | · | 10,097 Direct | +83.22% | Acquired | (price as of 2026-10-05) |
| Feb. 1, 2014 | BIIB | M | 4,586 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Feb. 1, 2014 | BIIB | F | 1,701 | $312.64 | $531,801 | 8,396 Direct | -16.85% | Disposed | -29.2% (price as of 2026-10-05) |
| Feb. 12, 2013 | BIIB | A | 8,987 | · | · | 8,987 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 9, 2013 | BIIB | M | 1,824 | · | · | 3,648 Direct | -33.33% | Disposed | (price as of 2026-10-05) |
| Feb. 9, 2013 | BIIB | F | 861 | $164.44 | $141,583 | 5,511 Direct | -13.51% | Disposed | 34.7% (price as of 2026-10-05) |
| Feb. 9, 2013 | BIIB | M | 1,824 | · | · | 6,372 Direct | +40.11% | Acquired | (price as of 2026-10-05) |
| Feb. 8, 2013 | BIIB | J | 352 | · | · | 7,911 Direct | -4.26% | Disposed | (price as of 2026-10-05) |
| Feb. 8, 2013 | BIIB | M | 2,284 | · | · | 8,263 Direct | -21.66% | Disposed | (price as of 2026-10-05) |
| Feb. 8, 2013 | BIIB | F | 831 | $164.44 | $136,650 | 4,548 Direct | -15.45% | Disposed | 34.7% (price as of 2026-10-05) |
| Feb. 8, 2013 | BIIB | M | 2,284 | · | · | 5,379 Direct | +73.80% | Acquired | (price as of 2026-10-05) |
| Feb. 1, 2013 | BIIB | M | 4,586 | · | · | 4,586 Direct | -50.00% | Disposed | (price as of 2026-10-05) |
| Feb. 1, 2013 | BIIB | F | 1,491 | $157.30 | $234,534 | 3,095 Direct | -32.51% | Disposed | 40.8% (price as of 2026-10-05) |
| Feb. 1, 2013 | BIIB | M | 4,586 | · | · | 4,586 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 14, 2012 | BIIB | S 10b5-1 | 1,247 | $118.61 | $147,907 | 0 Direct | -100.00% | Disposed | 86.7% (price as of 2026-10-05) |
| Feb. 9, 2012 | BIIB | M | 1,826 | · | · | 5,472 Direct | -25.02% | Disposed | (price as of 2026-10-05) |
| Feb. 9, 2012 | BIIB | F | 579 | $117.78 | $68,195 | 1,247 Direct | -31.71% | Disposed | 88.0% (price as of 2026-10-05) |
| Feb. 9, 2012 | BIIB | M | 1,826 | · | · | 1,826 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 8, 2012 | BIIB | A | 10,547 | · | · | 10,547 Direct | · | Acquired | (price as of 2026-10-05) |
| Feb. 6, 2012 | BIIB | S 10b5-1 | 3,110 | $121.03 | $376,403 | 0 Direct | -100.00% | Disposed | 83.0% (price as of 2026-10-05) |
| Feb. 1, 2012 | BIIB | M | 4,587 | · | · | 9,172 Direct | -33.34% | Disposed | (price as of 2026-10-05) |
| Feb. 1, 2012 | BIIB | F | 1,477 | $121.26 | $179,101 | 3,110 Direct | -32.20% | Disposed | 82.6% (price as of 2026-10-05) |
| Feb. 1, 2012 | BIIB | M | 4,587 | · | · | 4,587 Direct | · | Acquired | (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 |
|---|---|---|---|---|---|---|---|
| Feb. 1, 2021 | SRRK | Stock Option (Right to Buy) | Common Stock | $58.93 | Feb. 1, 2031 | 140,000 | Acquired |
| July 16, 2020 | SRRK | Stock Option (Right to Buy) | Common Stock | $13.83 | July 16, 2030 | 429,684 | Acquired |
| May 20, 2020 | SRRK | Stock Option (right to buy) | Common Stock | $19.68 | May 20, 2030 | 20,316 | Acquired |
| June 8, 2018 | TARA | Stock Option (Right to Buy) | Common Stock | $2.50 | June 7, 2028 | 12,700 | Acquired |
| June 20, 2017 | TARA | Stock Option (Right to Buy) | Common Stock, $0.001 par value | $1.30 | June 19, 2027 | 6,666 | Acquired |
| June 9, 2016 | TARA | Stock Option (Right to Buy) | Common Stock, $0.001 par value | $5.90 | June 8, 2026 | 6,666 | Acquired |
| Oct. 16, 2015 | TARA | Stock Option (Right to Buy) | Common Stock, $0.001 par value | $15.21 | Oct. 16, 2025 | 13,333 | Acquired |
| Feb. 23, 2015 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 23, 2018 | 6,220 | Acquired |
| Feb. 12, 2015 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 12, 2017 | 867 | Disposed |
| Feb. 12, 2015 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 12, 2017 | 1,355 | Disposed |
| Feb. 12, 2015 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 12, 2017 | 2,246 | Disposed |
| Feb. 9, 2015 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 9, 2015 | 1,824 | Disposed |
| Feb. 8, 2015 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 8, 2016 | 2,636 | Disposed |
| Feb. 12, 2014 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 12, 2017 | 6,670 | Acquired |
| Feb. 12, 2014 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 12, 2017 | 2,246 | Disposed |
| Feb. 9, 2014 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 9, 2015 | 1,824 | Disposed |
| Feb. 8, 2014 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 8, 2016 | 2,636 | Disposed |
| Feb. 1, 2014 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 23, 2014 | 4,586 | Disposed |
| Feb. 12, 2013 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 12, 2017 | 8,987 | Acquired |
| Feb. 9, 2013 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 9, 2015 | 1,824 | Disposed |
| Feb. 8, 2013 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 8, 2016 | 352 | Disposed |
| Feb. 8, 2013 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 8, 2016 | 2,284 | Disposed |
| Feb. 1, 2013 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 23, 2014 | 4,586 | Disposed |
| Feb. 9, 2012 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 9, 2015 | 1,826 | Disposed |
| Feb. 8, 2012 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 8, 2016 | 10,547 | Acquired |
| Feb. 1, 2012 | BIIB | Restricted Stock Unit | Common Stock | $0.00 | Feb. 23, 2014 | 4,587 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2020 | $238,000 | · | · | $4,396,154 | $312,000 | · | $6,692 | $4,952,846 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.