Bonnie L Bassler
CIK 1683607 · last filed 2026-06-08
"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
$5.84M
Companies
4
Total Filings
85
Lifetime Open-Market Net
-$22.33M
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 |
|---|---|---|---|---|---|---|---|
| RPRX | Director | 78,492 | $59.28 | $4.65M | $0 | 30 | 2026-06-08 |
| REGN | Director | 1,703 | $694.59 | $1.18M | -$22.33M | 33 | 2026-01-08 |
| Cidara Therapeutics, Inc. (CDTX) Delisted | Director | 0 | $221.38 | $0 | $0 | 8 | 2026-01-07 |
| Kaleido Biosciences, Inc. (KLDO) Delisted | Director | — | $0.29 | — | $0 | 2 | 2021-07-01 |
Recent Filings · Page 5 of 9
85 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 |
|---|---|---|---|---|---|
| 2023-08-23 | REGN | Mixed | — | -$372.8K | EDGAR |
| 2023-08-21 | REGN | Notice (144) | −853 | -$707.1K | EDGAR |
| 2023-08-11 | REGN | Mixed | — | -$338.7K | EDGAR |
| 2023-08-10 | REGN | Notice (144) | −853 | -$673.0K | EDGAR |
| 2023-06-30 | RPRX | Grant (A) | +1,208 | $37.5K | EDGAR |
| 2023-06-26 | RPRX | Grant (A) | +7,747 | $0 | EDGAR |
| 2023-06-23 | Cidara Therapeutics, Inc. (CDTX) Delisted | Grant (A) | — | $0 | EDGAR |
| 2023-03-31 | RPRX | Grant (A) | +1,049 | $37.5K | EDGAR |
| 2023-03-27 | REGN | Mixed | — | -$541.9K | EDGAR |
| 2023-02-07 | REGN | Mixed | — | -$406.4K | EDGAR |
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.