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KELLOGG PETER N
Insider
First SEC filing: May 22, 2026 · Latest: May 22, 2026
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
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 20, 2026 | ALNY | A | 1,441 | · | · | 1,441 Direct | · | Acquired | (price as of 2026-10-02) |
| May 20, 2026 | ALNY | A | 671 | · | · | 1,446 Direct | +86.58% | Acquired | (price as of 2026-10-02) |
| May 8, 2025 | ALNY | A | 775 | · | · | 775 Direct | · | Acquired | (price as of 2026-10-02) |
| May 8, 2025 | ALNY | A | 1,558 | · | · | 1,558 Direct | · | Acquired | (price as of 2026-10-02) |
| May 16, 2024 | ALNY | A | 5,228 | · | · | 5,228 Direct | · | Acquired | (price as of 2026-10-02) |
| March 7, 2023 | ALNY | A | 4,948 | · | · | 4,948 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 24, 2014 | MRK | A | 18,662 | $56.18 | $1,048,431 | 149,554 Direct | +14.26% | Acquired | 169.2% (price as of 2026-10-02) |
| Nov. 13, 2013 | MRK | M | 40,000 | · | · | 151,632 Direct | +35.83% | Acquired | (price as of 2026-10-02) |
| Nov. 13, 2013 | MRK | F | 20,740 | $47.59 | $987,017 | 130,892 Direct | -13.68% | Disposed | 217.8% (price as of 2026-10-02) |
| Nov. 13, 2013 | MRK | M | 40,000 | $47.59 | $1,903,600 | 0 Direct | -100.00% | Disposed | 217.8% (price as of 2026-10-02) |
| May 7, 2013 | MRK | M | 37,325 | $44.98 | $1,678,878 | 0 Direct | -100.00% | Disposed | 236.2% (price as of 2026-10-02) |
| May 7, 2013 | MRK | F | 19,354 | $44.98 | $870,543 | 111,632 Direct | -14.78% | Disposed | 236.2% (price as of 2026-10-02) |
| May 7, 2013 | MRK | M | 37,325 | · | · | 130,986 Direct | +39.85% | Acquired | (price as of 2026-10-02) |
| May 6, 2013 | MRK | A | 206,119 | · | · | 206,119 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 25, 2013 | MRK | A | 17,178 | $42.52 | $730,409 | 93,661 Direct | +22.46% | Acquired | 255.7% (price as of 2026-10-02) |
| May 2, 2012 | MRK | A | 234,004 | · | · | 234,004 Direct | · | Acquired | (price as of 2026-10-02) |
| May 2, 2012 | MRK | A | 16,289 | · | · | 16,289 Direct | · | Acquired | (price as of 2026-10-02) |
| April 24, 2012 | MRK | M | 17,550 | $38.27 | $671,638 | 0 Direct | -100.00% | Disposed | 295.2% (price as of 2026-10-02) |
| April 24, 2012 | MRK | F | 8,135 | $38.27 | $311,326 | 76,483 Direct | -9.61% | Disposed | 295.2% (price as of 2026-10-02) |
| April 24, 2012 | MRK | M | 17,550 | · | · | 84,618 Direct | +26.17% | Acquired | (price as of 2026-10-02) |
| Feb. 28, 2012 | MRK | A | 13,069 | $38.38 | $501,588 | 67,068 Direct | +24.20% | Acquired | 294.0% (price as of 2026-10-02) |
| Aug. 12, 2011 | MRK | P | 200 | $31.80 | $6,360 | 53,999 Direct | +0.37% | Acquired | 375.6% (price as of 2026-10-02) |
| Aug. 12, 2011 | MRK | P | 1,635 | $31.77 | $51,944 | 53,799 Direct | +3.13% | Acquired | 376.0% (price as of 2026-10-02) |
| Aug. 12, 2011 | MRK | P | 4,000 | $31.80 | $127,200 | 52,164 Direct | +8.30% | Acquired | 375.6% (price as of 2026-10-02) |
| Aug. 12, 2011 | MRK | P | 4,155 | $31.78 | $132,046 | 48,164 Direct | +9.44% | Acquired | 375.9% (price as of 2026-10-02) |
| Aug. 12, 2011 | MRK | P | 5,810 | $31.81 | $184,816 | 44,009 Direct | +15.21% | Acquired | 375.4% (price as of 2026-10-02) |
| May 4, 2011 | MRK | A | 238,806 | · | · | 238,806 Direct | · | Acquired | (price as of 2026-10-02) |
| May 4, 2011 | MRK | A | 17,505 | · | · | 17,505 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 28, 2011 | MRK | M | 11,700 | $32.19 | $376,623 | 0 Direct | -100.00% | Disposed | 369.8% (price as of 2026-10-02) |
| Feb. 28, 2011 | MRK | F | 4,253 | $32.19 | $136,904 | 38,199 Direct | -10.02% | Disposed | 369.8% (price as of 2026-10-02) |
| Feb. 28, 2011 | MRK | M | 11,700 | · | · | 42,452 Direct | +38.05% | Acquired | (price as of 2026-10-02) |
| Feb. 22, 2011 | MRK | A | 9,083 | $32.34 | $293,744 | 30,752 Direct | +41.92% | Acquired | 367.6% (price as of 2026-10-02) |
| Nov. 13, 2010 | MRK | M | 40,000 | $34.71 | $1,388,400 | 40,000 Direct | -50.00% | Disposed | 335.7% (price as of 2026-10-02) |
| Nov. 13, 2010 | MRK | F | 18,540 | $34.71 | $643,523 | 21,460 Direct | -46.35% | Disposed | 335.7% (price as of 2026-10-02) |
| Nov. 13, 2010 | MRK | M | 40,000 | · | · | 40,000 Direct | · | Acquired | (price as of 2026-10-02) |
| May 7, 2010 | MRK | A | 210,084 | · | · | 210,084 Direct | · | Acquired | (price as of 2026-10-02) |
| May 7, 2010 | MRK | A | 37,325 | · | · | 37,325 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 3, 2009 | MRK | A | 93,600 | · | · | 0 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 3, 2009 | MRK | A | 62,400 | · | · | 0 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 3, 2009 | MRK | A | 175,000 | · | · | 0 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 3, 2009 | MRK | A | 17,550 | · | · | 0 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 3, 2009 | MRK | A | 11,700 | · | · | 0 Direct | · | Acquired | (price as of 2026-10-02) |
| Nov. 3, 2009 | MRK | A | 80,000 | · | · | 0 Direct | · | Acquired | (price as of 2026-10-02) |
| March 20, 2007 | BIIB | S 10b5-1 | 7,252 | $44.48 | $322,569 | 18,966 Direct | -27.66% | Disposed | 394.3% (price as of 2026-10-02) |
| March 14, 2007 | BIIB | F | 5,198 | $44.11 | $229,284 | 26,218 Direct | -16.55% | Disposed | 398.5% (price as of 2026-10-02) |
| March 14, 2007 | BIIB | A | 12,450 | · | · | 31,416 Direct | +65.64% | Acquired | (price as of 2026-10-02) |
| Feb. 13, 2007 | BIIB | S 10b5-1 | 10,202 | $49.22 | $502,142 | 18,966 Direct | -34.98% | Disposed | 346.7% (price as of 2026-10-02) |
| Feb. 12, 2007 | BIIB | A | 29,800 | · | · | 29,800 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 12, 2007 | BIIB | A | 11,500 | · | · | 29,168 Direct | +65.09% | Acquired | (price as of 2026-10-02) |
| Feb. 6, 2007 | BIIB | D | 8,534 | · | · | 17,066 Direct | -33.34% | Disposed | (price as of 2026-10-02) |
| Feb. 6, 2007 | BIIB | F | 7,953 | $48.94 | $389,220 | 17,668 Direct | -31.04% | Disposed | 349.3% (price as of 2026-10-02) |
| Feb. 6, 2007 | BIIB | M | 8,534 | · | · | 25,621 Direct | +49.94% | Acquired | (price as of 2026-10-02) |
| Sept. 19, 2006 | BIIB | S 10b5-1 | 1,421 | $42.70 | $60,677 | 17,087 Direct | -7.68% | Disposed | 414.9% (price as of 2026-10-02) |
| Sept. 19, 2006 | BIIB | S 10b5-1 | 2,061 | $42.72 | $88,046 | 18,508 Direct | -10.02% | Disposed | 414.7% (price as of 2026-10-02) |
| Sept. 19, 2006 | BIIB | S 10b5-1 | 4,638 | $42.75 | $198,274 | 20,569 Direct | -18.40% | Disposed | 414.3% (price as of 2026-10-02) |
| Sept. 19, 2006 | BIIB | S 10b5-1 | 4,638 | $42.77 | $198,367 | 25,207 Direct | -15.54% | Disposed | 414.1% (price as of 2026-10-02) |
| Sept. 19, 2006 | BIIB | S 10b5-1 | 4,638 | $42.80 | $198,506 | 29,845 Direct | -13.45% | Disposed | 413.7% (price as of 2026-10-02) |
| Sept. 19, 2006 | BIIB | S 10b5-1 | 4,638 | $42.84 | $198,692 | 34,482 Direct | -11.86% | Disposed | 413.3% (price as of 2026-10-02) |
| Sept. 14, 2006 | BIIB | F | 12,967 | $43.39 | $562,638 | 39,120 Direct | -24.89% | Disposed | 406.8% (price as of 2026-10-02) |
| Sept. 14, 2006 | BIIB | A | 35,000 | · | · | 52,087 Direct | +204.83% | Acquired | (price as of 2026-10-02) |
| Feb. 6, 2006 | BIIB | A | 25,600 | · | · | 25,600 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 6, 2006 | BIIB | A | 64,100 | · | · | 64,100 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 17, 2005 | BIIB | A | 75,000 | · | · | 75,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 6, 2004 | BIIB | A | 45,000 | · | · | 45,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 6, 2004 | BIIB | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-02) |
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 20, 2026 | ALNY | Stock Option (Right to Buy) | Common Stock | $298.48 | May 20, 2036 | 1,441 | Acquired |
| May 8, 2025 | ALNY | Stock Option (right to buy) | Common Stock | $258.35 | May 8, 2035 | 1,558 | Acquired |
| May 16, 2024 | ALNY | Stock Option (right to buy) | Common Stock | $151.22 | May 16, 2034 | 5,228 | Acquired |
| March 7, 2023 | ALNY | Stock Option (right to buy) | Common Stock | $194.34 | March 7, 2033 | 4,948 | Acquired |
| Nov. 13, 2013 | MRK | Restricted Stock Unit | Common Stock | · | Nov. 13, 2013 | 40,000 | Disposed |
| May 7, 2013 | MRK | Restricted Stock Unit | Common Stock | · | May 7, 2013 | 37,325 | Disposed |
| May 6, 2013 | MRK | Stock Option (right to buy) | Common Stock | $44.98 | May 5, 2023 | 206,119 | Acquired |
| May 2, 2012 | MRK | Stock Option (right to buy) | Common Stock | $39.29 | May 1, 2022 | 234,004 | Acquired |
| May 2, 2012 | MRK | Restricted Stock Unit | Common Stock | · | May 2, 2015 | 16,289 | Acquired |
| April 24, 2012 | MRK | Restricted Stock Unit | Common Stock | · | April 24, 2012 | 17,550 | Disposed |
| May 4, 2011 | MRK | Stock Option (right to buy) | Common Stock | $36.56 | May 3, 2021 | 238,806 | Acquired |
| May 4, 2011 | MRK | Restricted Stock Unit | Common Stock | · | May 4, 2014 | 17,505 | Acquired |
| Feb. 28, 2011 | MRK | Restricted Stock Unit | Common Stock | · | Feb. 28, 2011 | 11,700 | Disposed |
| Nov. 13, 2010 | MRK | Restricted Stock Unit | Common Stock | · | Nov. 13, 2013 | 40,000 | Disposed |
| May 7, 2010 | MRK | Stock Option (right to buy) | Common Stock | $33.49 | May 6, 2020 | 210,084 | Acquired |
| May 7, 2010 | MRK | Restricted Stock Unit | Common Stock | · | May 7, 2013 | 37,325 | Acquired |
| Nov. 3, 2009 | MRK | Stock Option (right to buy) | Common Stock | $23.45 | April 23, 2019 | 93,600 | Acquired |
| Nov. 3, 2009 | MRK | Stock Option (right to buy) | Common Stock | $44.30 | Feb. 28, 2018 | 62,400 | Acquired |
| Nov. 3, 2009 | MRK | Stock Option (right to buy) | Common Stock | $57.49 | Nov. 12, 2017 | 175,000 | Acquired |
| Nov. 3, 2009 | MRK | Restricted Stock Unit | Common Stock | · | April 24, 2012 | 17,550 | Acquired |
| Nov. 3, 2009 | MRK | Restricted Stock Unit | Common Stock | · | Feb. 28, 2011 | 11,700 | Acquired |
| Nov. 3, 2009 | MRK | Restricted Stock Unit | Common Stock | · | Nov. 13, 2013 | 80,000 | Acquired |
| Feb. 12, 2007 | BIIB | Stock Option (right-to-buy) [F2] | Common Stock | $49.31 | Feb. 11, 2017 | 29,800 | Acquired |
| Feb. 6, 2007 | BIIB | Restricted Stock Unit | Common Stock | · | Feb. 6, 2007 | 8,534 | Disposed |
| Feb. 6, 2006 | BIIB | Restrcited Stock Units | Common Stock | · | · | 25,600 | Acquired |
| Feb. 6, 2006 | BIIB | Stock option (right-to-buy) [F2] | Common Stock | $44.24 | Feb. 5, 2016 | 64,100 | Acquired |
| Feb. 17, 2005 | BIIB | Stock Option (right-to-buy) [F1] | Common Stock | $67.57 | Feb. 17, 2015 | 75,000 | Acquired |
| Feb. 6, 2004 | BIIB | NQ Stock Option (right to buy) | Common Stock | $43.50 | Feb. 6, 2014 | 45,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).