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
$5.83M
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 | $59.18 | $4.65M | $0 | 30 | 2026-06-08 |
| REGN | Director | 1,703 | $695.42 | $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 8 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 |
|---|---|---|---|---|---|
| 2021-06-24 | Cidara Therapeutics, Inc. (CDTX) Delisted | Grant (A) | — | $0 | EDGAR |
| 2021-04-02 | RPRX | Grant (A) | +816 | $37.5K | EDGAR |
| 2021-01-25 | Cidara Therapeutics, Inc. (CDTX) Delisted | Grant (A) | — | $0 | EDGAR |
| 2021-01-05 | REGN | Grant (A) | +248 | $0 | EDGAR |
| 2021-01-04 | RPRX | Grant (A) | +820 | $37.5K | EDGAR |
| 2020-10-02 | RPRX | Grant (A) | +910 | $37.5K | EDGAR |
| 2020-09-23 | RPRX | Grant (A) | +12,637 | $6.6K | EDGAR |
| 2020-07-01 | Kaleido Biosciences, Inc. (KLDO) Delisted | Grant (A) | — | $0 | EDGAR |
| 2020-06-22 | REGN | Mixed | — | -$609.3K | EDGAR |
| 2020-06-05 | REGN | Mixed | — | -$532.5K | 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.