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Melinda Litherland Pei bought $20k of RPID

director at RAPID MICRO BIOSYSTEMS, INC.. 20,000 shares at an average of $1.02, traded Dec 3, 2024, filed Dec 5, 2024.

Conviction score
30
Value
$20k
20,000 shares
Holdings after
54,300
+58% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    Director
    +15
  • Trade size
    $20k at market
    0
  • Relative to holdings
    Holdings up 58%
    +10
  • Price context
    No price history yet
    0
  • Cluster
    No other insider buying within 14 days
    0
  • Repeat buying
    2 buys in 90 days
    +5
  • Track record
    Too few past buys to judge (0 with prices)
    0

What happened after comparable buys

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m 0.0%, 3m +154.4%, 6m +243.7%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

RPIDOct 12, 2026 · close 0.88
Since filing Dec 5, 2024: -14.7%SPY +31.2% · excess -45.9%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0001380106-24-000210, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 3, 2024POpen-market purchase
Class A Common Stock
+10,880$1.00$11k45,180Dec 5, 2024
Dec 5, 2024POpen-market purchase
Class A Common Stock
+9,120$1.04$9,48454,300Dec 5, 2024

Related signals

Other insiders at RAPID MICRO BIOSYSTEMS, INC. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
42Moderate
RPIDsell 3
RAPID MICRO BIOSYSTEMS, INC.
Sean M Wirtjes
CHIEF FINANCIAL OFFICER
$32k
7,480 shares
-1%
48Moderate
RPIDsell 3
RAPID MICRO BIOSYSTEMS, INC.
Robert G. Spignesi Jr.
PRESIDENT AND CEO
$74k
17,922 shares
-2%
41Moderate
RPIDsell 3
RAPID MICRO BIOSYSTEMS, INC.
John J. Addington Wilson
CHIEF OPERATING OFFICER
$41k
9,603 shares
-3%
45Moderate
RPIDsell 3
RAPID MICRO BIOSYSTEMS, INC.
Sean M Wirtjes
CHIEF FINANCIAL OFFICER
$68k
17,254 shares
-3%
51Moderate
RPIDsell 3
RAPID MICRO BIOSYSTEMS, INC.
Robert G. Spignesi Jr.
PRESIDENT AND CEO
$149k
38,327 shares
-3%
35Weak
RPIDsell 3
RAPID MICRO BIOSYSTEMS, INC.
John J. Addington Wilson
CHIEF OPERATING OFFICER
$21k
5,403 shares
-2%
37Weak
RPIDsell 4
RAPID MICRO BIOSYSTEMS, INC.
Sean M Wirtjes
CHIEF FINANCIAL OFFICER
$23k
6,027 shares
-1%
47Moderate
RPIDsell 4
RAPID MICRO BIOSYSTEMS, INC.
Robert G. Spignesi Jr.
PRESIDENT AND CEO
$49k
12,840 shares
-1%
35Weak
RPIDsell 4
RAPID MICRO BIOSYSTEMS, INC.
John J. Addington Wilson
CHIEF OPERATING OFFICER
$17k
4,610 shares
-2%
59Moderate
RPIDsell 4
RAPID MICRO BIOSYSTEMS, INC.
Longitude Capital Partners II, LLC
owner
$190k
49,000 shares
-100%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Melinda Litherland Pei bought $20k of RPID | InsiderTell