Day One Biopharmaceuticals, Inc.

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Day One Biopharmaceuticals, Inc.

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Trade Date Insider Title Buy or Sell Quantity Security Type Price Proceeds Transaction Conviction Position Quantity Position Value Positon Conviction SEC Link Nature of Ownership
2021-06-01Daniel J. Becker-Buy5,000Common Stock$16.00-$80,000.00  0.83     [ High ]5,000$80,000.00  0.83     [Very Low]Form 4-
2021-06-01John A. Josey-Buy7,000Common Stock$16.00-$112,000.00  1.16     [ High ]72,292$1,156,672.00  11.96    [Average]Form 4-
2021-06-01Papanek Julie Grant-Buy7,328,497Common Stock$0.00$0.00  -10,574,366$0.00  1,749.88 [Very High]Form 4By Canaan XI, L.P.
2021-06-01Papanek Julie Grant-Buy148,279Common Stock$0.00$0.00  -10,722,645$0.00  1,774.42 [Very High]Form 4By Canaan XI, L.P.
2021-06-01Papanek Julie Grant-Buy13,000Common Stock$16.00-$208,000.00  2.15     [ High ]10,735,645$171,770,320.00  1,776.57 [Very High]Form 4By Canaan XI, L.P.
2021-06-01Atlas Venture Fund Xi, L.p.-Buy7,761,380Common Stock$0.00$0.00  -7,761,380$0.00  1,284.38 [Very High]Form 4See Footnote
2021-06-01Atlas Venture Fund Xi, L.p.-Buy741,396Common Stock$0.00$0.00  -741,396$0.00  122.69   [Very High]Form 4See Footnote
2021-06-01Atlas Venture Fund Xi, L.p.-Buy250,000Common Stock$16.00-$4,000,000.00  41.37    [ Very High ]250,000$4,000,000.00  41.37    [High]Form 4See Footnote
2021-06-01Atlas Venture Fund Xi, L.p.-Buy250,000Common Stock$16.00-$4,000,000.00  41.37    [ Very High ]250,000$4,000,000.00  41.37    [High]Form 4See Footnote
2021-06-01Xi L.p. Canaan-Buy7,328,497Common Stock$0.00$0.00  -10,574,366$0.00  1,749.88 [Very High]Form 4-
2021-06-01Xi L.p. Canaan-Buy148,279Common Stock$0.00$0.00  -10,722,645$0.00  1,774.42 [Very High]Form 4-
2021-06-01Xi L.p. Canaan-Buy13,000Common Stock$16.00-$208,000.00  2.15     [ High ]10,735,645$171,770,320.00  1,776.57 [Very High]Form 4-
2021-06-01Ai Day 1 Llc-Buy8,502,776Common Stock$0.00$0.00  -8,502,776$0.00  1,407.07 [Very High]Form 4-
2021-06-01Ai Day 1 Llc-Buy875,000Common Stock$16.00-$14,000,000.00  144.80   [ Very High ]9,377,776$150,044,416.00  1,551.87 [Very High]Form 4-
2021-11-24Takeda Pharmaceutical Co Ltd-Buy57,224Common Stock$0.00$0.00  -6,527,606$0.00  1,054.05 [Very High]Form 4See Explanation of Responses
2021-11-24Atlas Venture Fund Xi, L.p.-Sell801,138Common Stock$0.00$0.00  -7,210,242$0.00  1,164.28 [Very High]Form 4-
2021-12-03Takeda Pharmaceutical Co Ltd-Sell12,517Common Stock$18.47$231,188.99  2.02     [ High ]6,515,089$120,333,693.83  1,052.03 [Very High]Form 4See Explanation of Responses
2021-12-06Takeda Pharmaceutical Co Ltd-Sell97,692Common Stock$18.05$1,763,340.60  15.77    [ Very High ]6,417,397$115,834,015.85  1,036.25 [Very High]Form 4See Explanation of Responses
2021-12-07Takeda Pharmaceutical Co Ltd-Sell128,745Common Stock$18.43$2,372,770.35  20.79    [ Very High ]6,288,652$115,899,856.36  1,015.46 [Very High]Form 4See Explanation of Responses
2021-12-07Takeda Pharmaceutical Co Ltd-Sell58,190Common Stock$19.50$1,134,705.00  9.40     [ Very High ]6,230,462$121,494,009.00  1,006.07 [Very High]Form 4See Explanation of Responses
2021-12-08Takeda Pharmaceutical Co Ltd-Sell110,338Common Stock$18.03$1,989,394.14  17.82    [ Very High ]6,120,124$110,345,835.72  988.25   [Very High]Form 4See Explanation of Responses
2021-12-08Xi L.p. Canaan-Sell536,000Common Stock$0.00$0.00  -10,199,645$0.00  1,646.99 [Very High]Form 4-
2021-12-21Xi L.p. Canaan-Sell536,000Common Stock$0.00$0.00  -9,663,645$0.00  1,560.44 [Very High]Form 4-
2022-01-03Samuel C. BlackmanChief Medical OfficerSell6,672Common Stock$16.95$113,090.40  1.08     [ High ]1,370,046$23,222,279.70  221.23   [Very High]Form 4-
2022-01-03Samuel C. BlackmanChief Medical OfficerSell3,328Common Stock$17.41$57,940.48  0.54     [ Average ]1,366,718$23,794,560.38  220.69   [Very High]Form 4-
2022-01-18Day1 Llc Ai-Buy43,429Common Stock$14.26-$619,297.54  7.01     [ Very High ]9,421,205$134,346,383.30  1,521.29 [Very High]Form 4-
2022-01-19Day1 Llc Ai-Buy58,818Common Stock$14.70-$864,624.60  9.50     [ Very High ]9,480,023$139,356,338.10  1,530.79 [Very High]Form 4-
2022-01-20Day1 Llc Ai-Buy4,615Common Stock$14.73-$67,978.95  0.75     [ Average ]9,484,638$139,708,717.74  1,531.53 [Very High]Form 4-
2022-06-15Samuel C. BlackmanChief Medical OfficerSell50,000Common Stock$16.26$813,000.00  8.08     [ Very High ]1,316,718$21,409,834.68  212.68   [Very High]Form 4-
2022-06-17Day1 Llc Ai-Buy1,200,000Common Stock$15.00-$18,000,000.00  193.82   [ Very High ]10,684,638$160,269,570.00  1,725.78 [Very High]Form 4-
2022-06-17Atlas Venture Opportunity Fund Ii, L.p.-Buy766,667Common Stock$15.00-$11,500,005.00  106.61   [ Very High ]766,667$11,500,005.00  106.61   [Very High]Form 4-
2022-06-17Michael Gladstone-Buy766,667Common Stock$15.00-$11,500,005.00  106.61   [ Very High ]766,667$11,500,005.00  106.61   [Very High]Form 4See Footnote