PERCEPTIVE LIFE SCIENCES MASTER FUND LTD
CIK 1249675 · last filed 2026-07-13
PERCEPTIVE LIFE SCIENCES MASTER FUND LTD is a corporate insider who has filed 62 SEC Form 4 insider transactions across 28 companies since 2007. The most recent filing, for KARD, was dated Jul 13, 2026. Across all open-market trades the lifetime net is +$1.13B, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $625.5M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$625.51M
Companies
28
Total Filings
62
Lifetime Open-Market Net
$1.13B
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| KARD | Director | 20,706 | — | — | $0 | 1 | 2026-07-13 |
| MGTX | Director | 10,786,658 | $11.86 | $127.93M | $62.28M | 4 | 2026-04-23 |
| OBIO | 10%+ Owner | 5,292,556 | $3.85 | $20.40M | $5.78M | 1 | 2025-08-05 |
| SLDB | Director | 449,987 | $8.00 | $3.60M | $89.01M | 4 | 2025-06-13 |
| LianBio (LIAN) Delisted | Director | 4,330,675 | $0.32 | $1.38M | $335.01M | 4 | 2024-02-20 |
| LeonaBio, Inc. (ATHA) Delisted | Director | 4,829,412 | $6.92 | $33.42M | $40.39M | 4 | 2023-12-29 |
| SOLENO THERAPEUTICS INC (SLNO) Delisted | 10%+ Owner | 2,207,753 | $53.01 | $117.03M | $2.56M | 1 | 2023-06-06 |
| Cerevel Therapeutics Holdings, Inc. (CERE) Delisted | Director | 6,511,727 | $44.96 | $292.77M | $149.62M | 1 | 2022-08-18 |
| ALDX | 10%+ Owner | 10,023,271 | $1.57 | $15.79M | $1.79M | 1 | 2022-08-01 |
| VRCA | 10%+ Owner | 503,898 | $5.49 | $2.76M | $9.00M | 1 | 2022-07-05 |
| NAUT | 10%+ Owner | 9,111,151 | $1.20 | $10.93M | $3.22M | 1 | 2021-12-10 |
| ADMA | 10%+ Owner | 15,705,710 | $8.73 | $137.11M | $41.00M | 2 | 2021-08-19 |
| Cerevel Therapeutics Holdings, Inc. (CEREW) Delisted | Director | 3,157,295 | $18.07 | $57.05M | $90.00M | 1 | 2020-10-29 |
| Quotient Ltd (QTNT) Delisted | 10%+ Owner | 405,020 | $0.38 | $153.9K | $37.12M | 1 | 2020-09-16 |
| ALBIREO PHARMA, INC. (ALBO) Delisted | 10%+ Owner | 2,360,139 | $44.15 | $104.20M | $75.22M | 2 | 2020-09-15 |
| VYNE Therapeutics Inc. (MNLO) Delisted | 10%+ Owner | 22,876,410 | — | — | $15.00M | 1 | 2020-06-11 |
| Lyra Therapeutics, Inc. (LYRA) Delisted | 10%+ Owner | 25,769 | $0.70 | $18.0K | $40.00M | 1 | 2020-05-29 |
| AGILE THERAPEUTICS INC (AGRX) Delisted | 10%+ Owner | 7,460 | $1.51 | $11.3K | $27.00M | 1 | 2020-02-25 |
| LA JOLLA PHARMACEUTICAL CO (LJPC) Delisted | 10%+ Owner | 3,563,611 | $6.22 | $22.17M | -$35.15M | 1 | 2019-01-09 |
| CRNX | Director | 2,187,953 | $83.85 | $183.46M | $60.46M | 2 | 2018-08-27 |
| ZOGENIX, INC. (ZGNX) Delisted | 10%+ Owner | 3,970,357 | $26.68 | $105.93M | $33.75M | 1 | 2017-10-03 |
| TALPHERA, INC. (ACRX) Delisted | 10%+ Owner | 285,942 | $0.86 | $245.9K | $28.54M | 3 | 2016-09-16 |
| AMICUS THERAPEUTICS, INC. (FOLD) Delisted | 10%+ Owner | 15,239,444 | $14.49 | $220.82M | $940.5K | 1 | 2015-10-08 |
| REPROS THERAPEUTICS INC. (RPRX.Z) Delisted | 10%+ Owner | 812,560 | — | — | $0 | 8 | 2013-03-20 |
| Aegerion Pharmaceuticals, Inc. (AEGR) Delisted | 10%+ Owner | 3,248,426 | — | — | $13.57M | 4 | 2013-03-06 |
| REPROS THERAPEUTICS INC. (RPRXZ) Delisted | 10%+ Owner | 1,558,060 | — | — | $3.94M | 6 | 2011-08-12 |
| PENWEST PHARMACEUTICALS CO (PPCO) Delisted | 10%+ Owner | 6,476,446 | — | — | $72.0K | 2 | 2010-09-27 |
| IDEV | 10%+ Owner | 1,380,650 | $89.47 | $123.52M | $0 | 1 | 2007-01-12 |
Recent Filings
62 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-07-13 | KARD | Grant (A) | +82,824 | $0 | EDGAR |
| 2026-04-23 | MGTX | Mixed | +1,666,665 | $15.00M | EDGAR |
| 2026-01-02 | MGTX | Disp (D) | −6,900,000 | -$54.58M | EDGAR |
| 2025-08-05 | OBIO | Buy (P) | +2,100,000 | $5.78M | EDGAR |
| 2025-06-13 | SLDB | Grant (A) | — | $0 | EDGAR |
| 2024-06-07 | MGTX | Grant (A) | — | $0 | EDGAR |
| 2024-02-20 | LianBio (LIAN) Delisted | Mixed | +102,492 | -$10 | EDGAR |
| 2023-12-29 | LeonaBio, Inc. (ATHA) Delisted | Buy (P) | +1,817,058 | $4.39M | EDGAR |
| 2023-06-06 | SOLENO THERAPEUTICS INC (SLNO) Delisted | Buy (P) | +429,894 | $2.56M | EDGAR |
| 2022-12-15 | SLDB | Grant (A) | — | $0 | EDGAR |
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.