Morningside Venture Investments Ltd
CIK 1543112 · last filed 2026-08-05
Morningside Venture Investments Ltd is a corporate insider who has filed 35 SEC Form 4 insider transactions across 5 companies since 2017. The most recent filing, for APMD, was dated Aug 5, 2026. Across all open-market trades the lifetime net is +$59.0M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $269.5M across reported positions. The firm reports its address in Newton Centre, MA. 4 SEC filings were submitted jointly with MVIL, LLC.
"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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
APLS price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
1188 CENTRE STREET
NEWTON CENTRE, MA 02459
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| APMD | 10%+ Owner | 7,152,713 | $18.32 | $131.07M | $5.00M | 1 | 2026-08-05 |
| Kezar Life Sciences, Inc. (KZR) Delisted | 10%+ Owner | 194,799 | $7.29 | $1.42M | $9.80M | 13 | 2023-08-17 |
| AMLX | 10%+ Owner | 4,997,302 | $27.70 | $138.43M | -$17.54M | 10 | 2023-08-17 |
| GreenLight Biosciences Holdings, PBC (GRNAW) Delisted | 10%+ Owner | 1,000,000 | $0.02 | $22.0K | $12.00M | 4 | 2023-07-25 |
| Apellis Pharmaceuticals, Inc. (APLS) Delisted | 10%+ Owner | 12,806,342 | $41.03 | $525.44M | $49.70M | 6 | 2021-11-18 |
Recent Filings
35 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-08-05 | APMD | Mixed | +7,228,337 | $6.09M | EDGAR |
| 2023-08-17 | Kezar Life Sciences, Inc. (KZR) Delisted | Gift (G) | −3,500,000 | $0 | EDGAR |
| 2023-08-17 | AMLX | Gift (G) | −2,000,000 | $0 | EDGAR |
| 2023-07-25 | GreenLight Biosciences Holdings, PBC (GRNAW) Delisted | Other (J) | −16,919,155 | $0 | EDGAR |
| 2023-03-31 | AMLX | Sell (S) | −29,048 | -$884.5K | EDGAR |
| 2023-03-29 | AMLX | Sell (S) | −160,964 | -$4.90M | EDGAR |
| 2023-03-23 | AMLX | Sell (S) | −63,448 | -$2.02M | EDGAR |
| 2023-03-17 | AMLX | Sell (S) | −9,122 | -$296.9K | EDGAR |
| 2023-03-16 | AMLX | Sell (S) | −220,714 | -$7.43M | EDGAR |
| 2023-03-06 | AMLX | Sell (S) | −50,000 | -$1.69M | EDGAR |
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.