Lampert Mark N (CIK 0001233840)

Latest company ownership

Shares held
19,710,680
Last filed at
Jun 9, 2025
Confidence Score
50.0
2026Q1
Confidence Score History
2024Q4 2026Q1
RGEN - REPLIGEN CORP
Role: 10% Owner
Shares held
12,867,400
Last filed at
May 20, 2009
Confidence Score
50.0
2026Q1
Confidence Score History
2009Q3 2026Q1
Shares held
11,514,471
Last filed at
Jun 13, 2025
Confidence Score
50.0
2026Q1
Confidence Score History
2020Q4 2026Q1
Shares held
9,697,997
Last filed at
May 15, 2013
Confidence Score
50.0
2026Q1
Confidence Score History
2013Q2 2026Q1
XOMA - XOMA Royalty Corp
Role: 10% Owner
Shares held
5,003,000
Last filed at
May 20, 2025
Confidence Score
49.5
2026Q1
Confidence Score History
2018Q4 2026Q1
Shares held
2,494,521
Last filed at
Mar 3, 2014
Confidence Score
50.0
2025Q4
Confidence Score History
2014Q1 2025Q4
Shares held
1,437,492
Last filed at
Jul 1, 2025
Confidence Score
50.6
2026Q1
Confidence Score History
2021Q3 2026Q1
Shares held
890,487
Last filed at
Jul 18, 2017
Confidence Score
50.0
2025Q4
Confidence Score History
2011Q2 2025Q4
Shares held
881,666
Last filed at
Aug 21, 2015
Confidence Score
50.0
2026Q1
Confidence Score History
2012Q4 2026Q1
Shares held
548,938
Last filed at
Nov 17, 2023
Confidence Score
50.0
2026Q1
Confidence Score History
2022Q1 2026Q1
Shares held
463,244
Last filed at
Dec 11, 2020
Confidence Score
50.0
2026Q1
Confidence Score History
2020Q1 2026Q1
Shares held
300,000
Last filed at
Jan 19, 2023
Confidence Score
50.0
2026Q1
Confidence Score History
2022Q2 2026Q1
Shares held
238,000
Last filed at
Mar 29, 2018
Confidence Score
50.0
2026Q1
Confidence Score History
2017Q2 2026Q1
Shares held
233,150
Last filed at
Feb 4, 2021
Confidence Score
50.0
2026Q1
Confidence Score History
2020Q2 2026Q1
MRUS - Merus N.V.
Role: 10% Owner
Shares held
232,747
Last filed at
Oct 8, 2021
Confidence Score
50.0
2025Q4
Confidence Score History
2020Q1 2025Q4
Shares held
204,301
Last filed at
Dec 17, 2024
Confidence Score
50.0
2026Q1
Confidence Score History
2019Q3 2026Q1
EPIX - ESSA Pharma Inc.
Role: 10% Owner
Shares held
203,336
Last filed at
Aug 7, 2025
Confidence Score
50.5
2025Q4
Confidence Score History
2025Q3 2025Q4
Shares held
130,175
Last filed at
Mar 26, 2014
Confidence Score
50.0
2026Q1
Confidence Score History
2014Q1 2026Q1
Shares held
25,944
Last filed at
Jun 17, 2025
Confidence Score
50.0
2025Q4
Confidence Score History
2019Q3 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Aug 5, 2025 Aug 7, 2025 ESSA Pharma Inc. 10% Owner Sell 52.5 -156 0.00% ✗ $293
Jun 30, 2025 Jul 1, 2025 Kymera Therapeutics, Inc. Director Buy 97.5 +317,167 6.27% ✗ $14M
May 16, 2025 May 20, 2025 XOMA Royalty Corp 10% Owner Sell 15.0 -392,723 -13.17% ✗ $10.6M
Jan 24, 2025 Jan 28, 2025 XOMA Royalty Corp 10% Owner Sell 15.0 -650,717 -17.91% ✗ $17M
Oct 4, 2024 Oct 8, 2024 MoonLake Immunotherapeutics Director Sell 15.0 -2,000,000 -9.22% ✗ $100M
Nov 15, 2023 Nov 17, 2023 Repare Therapeutics Inc. 10% Owner Buy 96.3 +1,227,301 6.52% ✗ $6.2M
Nov 2, 2023 Nov 6, 2023 Kymera Therapeutics, Inc. Director Buy 93.8 +414,105 4.36% ✗ $5.3M
Nov 2, 2023 Nov 3, 2023 Repare Therapeutics Inc. 10% Owner Buy 95.0 +783,709 9.61% ✗ $2.8M
Sep 12, 2023 Sep 14, 2023 Olema Pharmaceuticals, Inc. Director Buy 100.0 +1,605,488 22.02% ✗ $14.8M
Jan 11, 2023 Jan 13, 2023 Kymera Therapeutics, Inc. Director Buy 70.0 +41,007 0.47% ✗ $1.3M
Jan 5, 2023 Jan 9, 2023 XOMA Royalty Corp Director Buy 67.5 +22,249 0.31% ✗ $420.7K
Sep 23, 2022 Sep 27, 2022 XOMA Royalty Corp Director Buy 67.5 +24,642 0.23% ✗ $409.3K
Sep 14, 2022 Sep 16, 2022 XOMA Royalty Corp Director Buy 75.0 +56,309 0.83% ✗ $990.7K
Aug 22, 2022 Aug 23, 2022 Kymera Therapeutics, Inc. Director Buy 100.0 +545,525 13.46% ✗ $14.2M
Jun 13, 2022 Jun 15, 2022 Repare Therapeutics Inc. 10% Owner Buy 87.5 +149,161 1.86% ✗ $1.9M
Jun 10, 2022 Jun 14, 2022 Olema Pharmaceuticals, Inc. Director Buy 90.0 +200,000 3.02% ✗ $806.9K
Jun 2, 2022 Jun 6, 2022 Repare Therapeutics Inc. 10% Owner Buy 97.5 +1,836,958 8.53% ✗ $21.9M
Jun 1, 2022 Jun 3, 2022 Cullinan Therapeutics, Inc. 10% Owner Buy 100.0 +751,396 11.27% ✗ $8.3M
May 26, 2022 May 31, 2022 Kymera Therapeutics, Inc. Director Buy 92.5 +289,426 3.73% ✗ $4.2M
May 20, 2022 May 24, 2022 Kymera Therapeutics, Inc. Director Buy 65.0 +10,100 0.27% ✗ $141.4K
May 18, 2022 May 20, 2022 Repare Therapeutics Inc. 10% Owner Buy 95.0 +420,000 7.30% ✗ $3.6M
May 12, 2022 May 16, 2022 Cullinan Therapeutics, Inc. 10% Owner Buy 97.5 +1,109,900 9.40% ✗ $10.1M
May 5, 2022 May 9, 2022 Kymera Therapeutics, Inc. Director Buy 92.5 +250,000 3.49% ✗ $4.9M
Apr 1, 2022 Apr 5, 2022 Cullinan Therapeutics, Inc. 10% Owner Buy 95.0 +276,000 5.55% ✗ $3M
Jan 27, 2022 Jan 31, 2022 Kymera Therapeutics, Inc. Other Buy 88.8 +130,309 2.03% ✗ $5.1M
Jan 24, 2022 Jan 26, 2022 Kymera Therapeutics, Inc. Other Buy 97.5 +272,767 9.43% ✗ $10.3M
Jan 19, 2022 Jan 21, 2022 Repare Therapeutics Inc. 10% Owner Buy 100.0 +997,961 21.00% ✗ $14.1M
Nov 30, 2021 Dec 2, 2021 Olema Pharmaceuticals, Inc. 10% Owner Buy 100.0 +739,675 11.64% ✗ $6.9M
Oct 7, 2021 Oct 8, 2021 Merus N.V. 10% Owner Sell 15.0 -1,132,714 -12.65% ✗ $31.2M
Jul 2, 2021 Jul 7, 2021 Merus N.V. 10% Owner Sell 15.0 -2,186,022 -30.54% ✗ $45.4M
Jul 1, 2021 Jul 6, 2021 Kymera Therapeutics, Inc. Other Buy 100.0 +544,166 21.28% ✗ $25.6M
Mar 31, 2021 Apr 2, 2021 XOMA Royalty Corp 10% Owner Sell 15.0 -651,700 -14.87% ✗ $25M
Mar 30, 2021 Apr 1, 2021 Merus N.V. 10% Owner Buy 93.8 +300,000 4.37% ✗ $5.9M
Mar 22, 2021 Mar 24, 2021 Merus N.V. 10% Owner Buy 87.5 +79,500 1.99% ✗ $1.8M
Mar 16, 2021 Mar 18, 2021 Merus N.V. 10% Owner Buy 93.8 +250,000 3.83% ✗ $5.7M
Feb 2, 2021 Feb 4, 2021 IDEAYA Biosciences, Inc. Other Sell 20.0 -46,409 -1.49% ✗ $835.4K
Jan 21, 2021 Jan 25, 2021 Merus N.V. 10% Owner Buy 100.0 +844,680 14.86% ✗ $20.9M
Dec 18, 2020 Dec 22, 2020 Merus N.V. 10% Owner Buy 92.5 +160,000 3.11% ✗ $2.6M
Dec 11, 2020 Dec 15, 2020 XOMA Royalty Corp 10% Owner Buy 93.8 +200,000 4.77% ✗ $5M
Dec 9, 2020 Dec 11, 2020 CYTOKINETICS INC Other Sell 16.3 -430,954 -5.77% ✗ $7.8M
Nov 19, 2020 Nov 20, 2020 Olema Pharmaceuticals, Inc. 10% Owner Buy 100.0 +1,135,334 21.76% ✗ $21.6M
Nov 4, 2020 Nov 6, 2020 CRESCENT BIOPHARMA, INC. 10% Owner Buy 100.0 +1,266,737 15.72% ✗ $3.3M
Oct 30, 2020 Nov 3, 2020 CRESCENT BIOPHARMA, INC. 10% Owner Buy 100.0 +932,612 13.09% ✗ $2.6M
Sep 21, 2020 Sep 23, 2020 XOMA Royalty Corp 10% Owner Buy 67.5 +51,368 0.45% ✗ $942K
Sep 15, 2020 Sep 17, 2020 Merus N.V. 10% Owner Buy 92.5 +146,754 2.73% ✗ $1.7M
Sep 10, 2020 Sep 14, 2020 Merus N.V. 10% Owner Buy 92.5 +189,651 3.66% ✗ $2.1M
Sep 4, 2020 Sep 10, 2020 XOMA Royalty Corp 10% Owner Buy 60.0 +7,737 0.19% ✗ $145.2K
Sep 3, 2020 Sep 8, 2020 Merus N.V. 10% Owner Buy 92.5 +201,906 4.05% ✗ $2.3M
Aug 28, 2020 Sep 1, 2020 XOMA Royalty Corp 10% Owner Buy 67.5 +35,621 0.31% ✗ $666.5K
Aug 21, 2020 Aug 25, 2020 XOMA Royalty Corp 10% Owner Buy 67.5 +28,175 0.25% ✗ $546.7K
Aug 18, 2020 Aug 20, 2020 XOMA Royalty Corp 10% Owner Buy 65.0 +6,163 0.28% ✗ $120K
Aug 12, 2020 Aug 14, 2020 XOMA Royalty Corp 10% Owner Buy 85.0 +27,022 1.25% ✗ $498.7K
Jun 30, 2020 Jul 2, 2020 IDEAYA Biosciences, Inc. 10% Owner Buy 56.3 +2,531 0.08% ✗ $33.7K
Jun 19, 2020 Jun 22, 2020 IDEAYA Biosciences, Inc. 10% Owner Buy 87.5 +117,996 1.94% ✗ $1.7M
Jun 8, 2020 Jun 10, 2020 Merus N.V. 10% Owner Buy 87.5 +87,254 1.78% ✗ $1.3M
Jun 1, 2020 Jun 3, 2020 Merus N.V. 10% Owner Buy 100.0 +1,462,510 42.57% ✗ $20.5M
Mar 25, 2020 Mar 27, 2020 XOMA Royalty Corp 10% Owner Buy 72.5 +8,264 0.55% ✗ $142.1K
Mar 18, 2020 Mar 20, 2020 XOMA Royalty Corp 10% Owner Buy 65.0 +4,439 0.30% ✗ $64.5K
Mar 13, 2020 Mar 17, 2020 XOMA Royalty Corp 10% Owner Buy 95.0 +118,277 8.57% ✗ $2.1M
Feb 13, 2020 Feb 18, 2020 CYTOKINETICS INC 10% Owner Sell 15.0 -1,072,030 -15.36% ✗ $16.9M
Jan 16, 2020 Jan 21, 2020 Merus N.V. 10% Owner Buy 95.0 +278,730 8.83% ✗ $4.5M
Jan 13, 2020 Jan 15, 2020 Merus N.V. 10% Owner Buy 92.5 +83,962 2.73% ✗ $1.3M
Dec 18, 2019 Dec 20, 2019 XOMA Royalty Corp 10% Owner Buy 100.0 +373,195 17.69% ✗ $8.2M
Sep 6, 2019 Sep 10, 2019 PALVELLA THERAPEUTICS, INC. 10% Owner Sell 22.5 -50,000 -1.00% ✗ $225K
Sep 5, 2019 Sep 9, 2019 CRESCENT BIOPHARMA, INC. 10% Owner Buy 100.0 +1,668,746 30.59% ✗ $5.3M
May 10, 2019 May 14, 2019 XOMA Royalty Corp 10% Owner Buy 90.0 +27,913 2.94% ✗ $408.2K
Dec 17, 2018 Dec 19, 2018 XOMA Royalty Corp 10% Owner Buy 90.0 +25,000 2.70% ✗ $354.8K
Dec 11, 2018 Dec 13, 2018 XOMA Royalty Corp 10% Owner Buy 90.0 +36,463 4.10% ✗ $527.2K
Dec 6, 2018 Dec 10, 2018 XOMA Royalty Corp 10% Owner Buy 92.5 +61,023 7.37% ✗ $897.4K
Nov 30, 2018 Dec 4, 2018 XOMA Royalty Corp 10% Owner Buy 82.5 +9,800 1.20% ✗ $146.1K
Nov 27, 2018 Nov 29, 2018 XOMA Royalty Corp 10% Owner Buy 90.0 +29,700 3.77% ✗ $448.5K
Nov 19, 2018 Nov 21, 2018 XOMA Royalty Corp 10% Owner Buy 100.0 +72,253 10.09% ✗ $1M
Nov 15, 2018 Nov 19, 2018 XOMA Royalty Corp 10% Owner Buy 90.0 +31,990 4.68% ✗ $431.3K
Aug 14, 2017 Aug 16, 2017 Xenon Pharmaceuticals Inc. 10% Owner Buy 82.5 +60,202 1.11% ✗ $157.3K
Jul 14, 2017 Jul 18, 2017 Capstone Holding Corp. Other Sell 20.0 -4,341,586 -65.68% ✗ $260.5K
Jun 27, 2017 Jun 30, 2017 Xenon Pharmaceuticals Inc. 10% Owner Buy 90.0 +85,461 2.94% ✗ $259.5K
Jun 27, 2017 Jun 29, 2017 Xenon Pharmaceuticals Inc. 10% Owner Buy 90.0 +85,461 2.94% ✗ $341.8K
Jun 21, 2017 Jun 23, 2017 Xenon Pharmaceuticals Inc. 10% Owner Buy 65.0 +20,411 0.35% ✗ $81.6K
Jun 15, 2017 Jun 19, 2017 Xenon Pharmaceuticals Inc. 10% Owner Buy 65.0 +26,408 0.31% ✗ $101.5K
Jun 6, 2017 Jun 8, 2017 Xenon Pharmaceuticals Inc. 10% Owner Buy 95.0 +358,698 6.97% ✗ $1.4M
Jul 1, 2014 Jul 3, 2014 Capstone Holding Corp. 10% Owner Sell 22.5 -616,563 -8.53% ✗ $185K
Mar 24, 2014 Mar 26, 2014 LIGAND PHARMACEUTICALS INC Other Sell 16.3 -78,226 -17.84% ✗ $5.5M
Feb 27, 2014 Mar 3, 2014 PALATIN TECHNOLOGIES INC 10% Owner Sell 20.0 -293,825 -7.35% ✗ $320.3K
Feb 24, 2014 Feb 26, 2014 PALATIN TECHNOLOGIES INC 10% Owner Sell 20.0 -540,181 -11.90% ✗ $615.9K
Feb 18, 2014 Feb 20, 2014 LIGAND PHARMACEUTICALS INC 10% Owner Sell 15.0 -422,900 -16.10% ✗ $31.2M
Feb 14, 2014 Feb 19, 2014 PALATIN TECHNOLOGIES INC 10% Owner Sell 20.0 -305,966 -6.31% ✗ $357.1K
Nov 19, 2013 Nov 20, 2013 RIGEL PHARMACEUTICALS INC 10% Owner Sell 17.5 -484,622 -21.49% ✗ $1.3M
Jun 7, 2013 Jun 11, 2013 RIGEL PHARMACEUTICALS INC 10% Owner Buy 82.5 +32,700 1.47% ✗ $113.4K
Nov 16, 2012 Nov 20, 2012 GYRE THERAPEUTICS, INC. 10% Owner Buy 100.0 +595,000 14.52% ✗ $2.4M
Nov 14, 2012 Nov 19, 2012 GYRE THERAPEUTICS, INC. 10% Owner Buy 100.0 +1,290,212 18.49% ✗ $5.2M
Nov 7, 2012 Nov 9, 2012 GYRE THERAPEUTICS, INC. 10% Owner Buy 85.0 +72,429 1.28% ✗ $291.9K
Oct 31, 2012 Nov 2, 2012 GYRE THERAPEUTICS, INC. 10% Owner Buy 85.0 +139,700 1.72% ✗ $566.2K
Sep 6, 2011 Sep 8, 2011 Capstone Holding Corp. 10% Owner Buy 87.5 +312,900 4.53% ✗ $81K
Aug 18, 2011 Aug 22, 2011 Capstone Holding Corp. 10% Owner Buy 61.3 +78,900 0.44% ✗ $20.5K
Jul 28, 2011 Aug 1, 2011 Capstone Holding Corp. 10% Owner Buy 90.0 +954,250 8.71% ✗ $238.6K
Jul 26, 2011 Jul 28, 2011 Capstone Holding Corp. 10% Owner Buy 60.0 +18,400 0.37% ✗ $4.6K
Jul 20, 2011 Jul 22, 2011 Capstone Holding Corp. 10% Owner Buy 90.0 +252,600 5.28% ✗ $63.1K
Jul 14, 2011 Jul 18, 2011 Capstone Holding Corp. 10% Owner Buy 87.5 +358,600 4.70% ✗ $89.3K
Jul 11, 2011 Jul 13, 2011 Capstone Holding Corp. 10% Owner Buy 60.0 +9,000 0.28% ✗ $2.3K
Jun 30, 2011 Jul 5, 2011 Capstone Holding Corp. 10% Owner Buy 55.0 +4,700 0.09% ✗ $1.2K