Melinda Litherland Pei
CIK: 0001703469
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (12 total)
- May 29, 2026RPID
RAPID MICRO BIOSYSTEMS, INC.
Award(A)Direct12.8K shares at avg. $1.96$25K - May 21, 2026RPID
RAPID MICRO BIOSYSTEMS, INC.
Award(A)Direct19.3K shares- - Apr 21, 2026BIO BIO.B
BIO-RAD LABORATORIES, INC.
Exercise(M)Direct407 shares- - Apr 21, 2026BIO BIO.B
BIO-RAD LABORATORIES, INC.
Award(A)DirectRestricted Stock Units
369 shares- - May 22, 2025RPID
RAPID MICRO BIOSYSTEMS, INC.
Award(A)Direct14.3K shares- - Apr 22, 2025BIO BIO.B
BIO-RAD LABORATORIES, INC.
Award(A)DirectRestricted Stock Units
407 shares- - Apr 22, 2025BIO BIO.B
BIO-RAD LABORATORIES, INC.
Exercise(M)Direct308 shares- - Dec 5, 2024RPID
RAPID MICRO BIOSYSTEMS, INC.
Purchase(P)Direct9.1K shares at avg. $1.04$9K - Dec 3, 2024RPID
RAPID MICRO BIOSYSTEMS, INC.
Purchase(P)Direct10.9K shares at avg. $1.00$11K - Nov 27, 2024RPID
RAPID MICRO BIOSYSTEMS, INC.
Purchase(P)Direct19.9K shares at avg. $1.05$21K - Nov 26, 2024RPID
RAPID MICRO BIOSYSTEMS, INC.
Purchase(P)Direct108 shares at avg. $1.04$112.32 - Sep 6, 2024BIO BIOB
BIO-RAD LABORATORIES, INC.
Award(A)DirectRestricted Stock Units
308 shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 29, 2026 |  RPID RAPID MICRO BIOSYSTEMS, INC. | Award(A) | 12,787 | $1.96 | $24,999 | Direct |
| May 21, 2026 | RPID RAPID MICRO BIOSYSTEMS, INC. | Award(A) | 19,300 | - | $0 | Direct |
| Apr 21, 2026 |  BIO BIO.B BIO-RAD LABORATORIES, INC. | Exercise(M) | 407 | - | $0 | Direct |
| Apr 21, 2026 | BIO BIO.B BIO-RAD LABORATORIES, INC. | Award(A) Restricted Stock Units | 369 | - | - | Direct |
| May 22, 2025 | RPID RAPID MICRO BIOSYSTEMS, INC. | Award(A) | 14,300 | - | - | Direct |
| Apr 22, 2025 | BIO BIO.B BIO-RAD LABORATORIES, INC. | Award(A) Restricted Stock Units | 407 | - | - | Direct |
| Apr 22, 2025 | BIO BIO.B BIO-RAD LABORATORIES, INC. | Exercise(M) | 308 | - | - | Direct |
| Dec 5, 2024 | RPID RAPID MICRO BIOSYSTEMS, INC. | Purchase(P) | 9,120 | $1.04 | $9,484 | Direct |
| Dec 3, 2024 | RPID RAPID MICRO BIOSYSTEMS, INC. | Purchase(P) | 10,880 | $1.00 | $10,880 | Direct |
| Nov 27, 2024 | RPID RAPID MICRO BIOSYSTEMS, INC. | Purchase(P) | 19,892 | $1.05 | $20,887 | Direct |
| Nov 26, 2024 | RPID RAPID MICRO BIOSYSTEMS, INC. | Purchase(P) | 108 | $1.04 | $112 | Direct |
| Sep 6, 2024 |  BIO BIOB BIO-RAD LABORATORIES, INC. | Award(A) Restricted Stock Units | 308 | - | - | Direct |
1-12 of 12 transactions
About PEI MELINDA LITHERLAND
PEI MELINDA LITHERLAND (SEC CIK 0001703469) files insider reports with the SEC as Director of RAPID MICRO BIOSYSTEMS, INC. (RPID) and Director of BIO-RAD LABORATORIES, INC. (BIO BIO.B).
Signal8 holds 8 ownership filings by PEI MELINDA LITHERLAND, all Form 4s, filed between Sep 10, 2024 and Jun 2, 2026. Those filings report 12 transactions, from Sep 6, 2024 to May 29, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on PEI MELINDA LITHERLAND's filings is in LEXINGTON, MA.
Recent filings by PEI MELINDA LITHERLAND
- May 29, 2026: Grant or award of RPID shares (Form 4, code A).
- May 21, 2026: Grant or award of RPID shares (Form 4, code A).
- Apr 21, 2026: Option exercise of BIO BIO.B shares (Form 4, code M).
- Apr 21, 2026: Grant or award of BIO BIO.B derivative securities (Form 4, code A).
- May 22, 2025: Grant or award of RPID shares (Form 4, code A).
Other insiders filing for RAPID MICRO BIOSYSTEMS, INC. (RPID)
- Kollender Richard S, Director
- Spignesi Robert G. Jr., PRESIDENT AND CEO
- LOWENSTEIN INESE, Director
- Malloy Kirk, Director
- WIRTJES SEAN M, CHIEF FINANCIAL OFFICER
- Bika Dafni, Director