InsiderDirector
P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert Insider Trading Activity
Every SEC Form 4 transaction reported by P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert, sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud Research Team · SEC Form 4 & insider trading data analysts
Last updated:
Quick Answer
Is P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert buying or selling?
P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert reported 93 open-market buys ($391.6M) and 23 sells ($981.8M) across 116 Form 4 filings at 23 companies — a net selling position of $590.2M.
Source: SEC EDGAR Form 4
Key Statistics (as of Jun 26, 2026)
Total Form 4 filings
116
SEC EDGAR
Companies
23
Buys (93)
$391.6M
Sells (23)
$981.8M
Insider sentiment
Net sellingNet insider flow of $590.2M in net selling, filed between Jun 1, 2018 – Jun 26, 2026.
Companies P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert files for
| # | Company | Form 4 filings |
|---|---|---|
| 1 | XOMAXOMA Corp | 25 |
| 2 | MRUSMerus N.V. | 14 |
| 3 | FPRXFIVE PRIME THERAPEUTICS, INC. | 12 |
| 4 | KYMRKymera Therapeutics, Inc. | 11 |
| 5 | INFIINFINITY PHARMACEUTICALS, INC. | 7 |
| 6 | RAINRain Therapeutics Inc. | 7 |
| 7 | RPTXRepare Therapeutics Inc. | 6 |
| 8 | CALACalithera Biosciences, Inc. | 4 |
| 9 | OLMAOlema Pharmaceuticals, Inc. | 4 |
| 10 | CBIOGLYCOMIMETICS INC | 3 |
Recent P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert transactions
| Date | Ticker | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| Jun 26, 2026 | KYMR | Director | Sale | 1.6M | $173.7M |
| Apr 2, 2026 | MLTX | Director, 10% Owner | Sale | 3.8M | $63.0M |
| Aug 7, 2025 | EPIX | 10% Owner | Sale | 156 | $292.95 |
| Jul 1, 2025 | KYMR | Director | Purchase | 317.2K | $14.0M |
| May 20, 2025 | XOMA | 10% Owner | Sale | 392.7K | $10.6M |
| Jan 28, 2025 | XOMA | 10% Owner | Sale | 650.7K | $17.0M |
| Oct 31, 2024 | THRD | Other | Sale | 1.0M | $14.3M |
| Oct 8, 2024 | MLTX | Director, 10% Owner | Sale | 2.0M | $100.0M |
| May 13, 2024 | ELDN | 10% Owner | Purchase | 1.9M | $0 |
| Dec 20, 2023 | PNT | Other | Sale | 17.2M | $213.7M |
| Nov 17, 2023 | RPTX | 10% Owner | Purchase | 1.2M | $6.2M |
| Nov 6, 2023 | KYMR | Director | Purchase | 414.1K | $5.3M |
| Nov 3, 2023 | RPTX | 10% Owner | Purchase | 783.7K | $2.8M |
| Sep 14, 2023 | OLMA | Director, 10% Owner | Purchase | 1.5M | $14.8M |
| May 10, 2023 | ELDN | 10% Owner | Purchase | 2.0M | $0 |
| Jan 13, 2023 | KYMR | Director | Purchase | 41.0K | $1.3M |
| Jan 9, 2023 | XOMA | Director, 10% Owner | Purchase | 22.2K | $420.7K |
| Dec 22, 2022 | THRD | 10% Owner | Purchase | 214.1K | $879.5K |
| Nov 10, 2022 | RAIN | Director, 10% Owner | Purchase | 1.7M | $10.0M |
| Sep 27, 2022 | XOMA | Director, 10% Owner | Purchase | 24.6K | $409.3K |
| Sep 16, 2022 | XOMA | Director, 10% Owner | Purchase | 56.3K | $990.7K |
| Aug 23, 2022 | KYMR | Director | Purchase | 545.5K | $14.2M |
| Aug 11, 2022 | CTIC | Director, 10% Owner | Sale | 8.5M | $52.0M |
| Jun 15, 2022 | RPTX | 10% Owner | Purchase | 149.2K | $1.9M |
| Jun 14, 2022 | OLMA | Director, 10% Owner | Purchase | 200.0K | $806.9K |
Showing the 25 most recent filings of 116. Screen every filing.
P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert insider trading FAQ
Is P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert buying or selling?
Across 116 SEC Form 4 filings, P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert reported 93 open-market purchases totaling $391.6M and 23 sales totaling $981.8M — a net selling position of $590.2M.
Which companies does P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert file Form 4s for?
P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert has reported insider transactions at 23 companies, most often XOMA Corp (XOMA), Merus N.V. (MRUS), FIVE PRIME THERAPEUTICS, INC. (FPRX), Kymera Therapeutics, Inc. (KYMR), INFINITY PHARMACEUTICALS, INC. (INFI).
How far back does P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert's filing history go?
Trabud holds P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert's SEC Form 4 filings from Jun 1, 2018 – Jun 26, 2026, sourced directly from SEC EDGAR.
Where does Trabud get P/Il L Bvf Partners / BIOTECHNOLOGY VALUE FUND L P / BVF I GP LLC / BIOTECHNOLOGY VALUE FUND II LP / BVF II GP LLC / Biotechnology Value Trading Fund OS LP / BVF Partners OS Ltd. / BVF GP HOLDINGS LLC / BVF INC/IL / Mark N Lampert's insider trading data?
Directly from SEC EDGAR Form 4 filings. Every transaction on this page is a real filing accepted by the SEC, updated as new filings arrive.
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