Charles Cherington
CIK 1448698 · last filed 2026-02-17
Charles Cherington is a corporate insider who has filed 20 SEC Form 4 insider transactions across 4 companies since 2021. The most recent filing shows the insider bought $2.0M of ERNAW on Feb 17, 2026. Across all open-market trades the lifetime net is +$1.7M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $2.9M 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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
BTX 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
CAMBRIDGE, MA 02138
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ERNAW | 10%+ Owner | 6,779,440 | $0.03 | $175.6K | $2.00M | 1 | 2026-02-17 |
| ERNA | 10%+ Owner | 111,093 | $1.94 | $215.3K | $3.47M | 7 | 2025-06-11 |
| Comera Life Sciences Holdings, Inc. (CMRAW) Delisted | 10%+ Owner | 7,082,411 | $0.02 | $136.7K | $2.54M | 8 | 2023-09-11 |
| BTX | Director | 294,710 | $8.52 | $2.51M | -$6.30M | 3 | 2022-08-03 |
Recent Filings
20 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-02-17 | ERNAW | Buy (P) | +4,000,000 | $2.00M | EDGAR |
| 2025-06-11 | ERNA | Buy (P) | +21,241,163 | $2.22M | EDGAR |
| 2025-05-07 | ERNA | Mixed | +13,252,112 | $0 | EDGAR |
| 2025-04-04 | ERNA | Buy (P) | +3,768,397 | $394.2K | EDGAR |
| 2024-11-05 | ERNA | Mixed | +16,071,658 | $1.41M | EDGAR |
| 2024-01-03 | — | Buy (P) | — | $0 | |
| 2023-12-20 | ERNA | Mixed | — | $0 | EDGAR |
| 2023-09-11 | Comera Life Sciences Holdings, Inc. (CMRAW) Delisted | Buy (P) | +2,053,789 | $1.05M | EDGAR |
| 2023-08-25 | Comera Life Sciences Holdings, Inc. (CMRAW) Delisted | Buy (P) | +880,195 | $450.0K | EDGAR |
| 2023-08-25 | ERNA | Buy (P) | — | $0 | 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.