Insider sale activity reported at PLAB (NASDAQ: PLAB)

Rhea-AI Filing Summary

Frank K. Lee reported multiple proposed sales of Common Stock via Fidelity Brokerage Services LLC under a Form 144 notice. The filing lists restricted stock vesting of 10,000 shares on 01/03/2024 and several proposed or executed dispositions, including a 10,000-share sale at $451,000 on 04/15/2026 and earlier trades in 2026 with individual proceeds shown.

Insights

Compliance & Insider Transactions Analyst

Form 144 lists multiple proposed or reported sales by an affiliate, with per-trade proceeds disclosed.

The filing shows a sequence of dispositions by Frank K. Lee, with individual trade sizes and proceeds recorded (for example, 10,000 shares for $451,000 on 04/15/2026). These entries are consistent with scheduled or reported affiliate sales tied to vested restricted stock.

Trade timing, brokerage (Fidelity), and per-trade proceeds are provided; cash‑flow recipients are the selling affiliate. Timing and broader ownership context are not included in the excerpt.

Key Figures

Restricted stock vesting: 10,000 shares Sale on 04/15/2026: 10,000 shares Sale on 01/16/2026: 10,000 shares +1 more

4 metrics

Restricted stock vesting 10,000 shares vesting date 01/03/2024, listed as Compensation

Sale on 04/15/2026 10,000 shares proceeds $451,000 reported for Frank K. Lee

Sale on 01/16/2026 10,000 shares proceeds $345,090.55 reported for Frank K. Lee

Sale on 03/23/2026 10,000 shares proceeds $390,000.00 reported for Frank K. Lee

Key Terms

Form 144, Restricted Stock Vesting, Compensation

3 terms

Form 144 regulatory

"Filer Information | ... | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Vesting financial

"Common | 01/03/2024 | Restricted Stock Vesting"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Compensation financial

"10000 | 01/03/2024 | Compensation"

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 04/16/2026 - 03:48 PM Learn about SEC filing dates

FAQ

What does the PLAB Form 144 disclose about insider sales?

The Form 144 shows multiple proposed or reported sales by an affiliate, with per-trade proceeds listed. It lists specific transactions by Frank K. Lee, including share counts and proceeds for each dated trade in 2026.

How many shares vested under the restricted stock entry in the PLAB filing?

The filing lists a restricted stock vesting of 10,000 shares on 01/03/2024. That vesting is identified as compensation-related in the excerpt.

Which brokerage handled the reported PLAB transactions?

The trades were handled through Fidelity Brokerage Services LLC. The excerpt lists Fidelity's address and indicates the broker for the reported share sales.

What is an example transaction and proceeds shown in the PLAB filing?

An example shown is a sale of 10,000 shares with proceeds of $451,000 on 04/15/2026. The filing lists multiple similar entries with dates, share counts, and proceeds.

Does the Form 144 show who receives the sale proceeds for PLAB trades?

The proceeds appear tied to the selling affiliate, Frank K. Lee, via Fidelity Brokerage Services LLC. The excerpt lists per-trade proceeds but does not state additional use-of-proceeds details.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	10000	458000.00	58966394	04/16/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	01/03/2024	Restricted Stock Vesting	Issuer			10000	01/03/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	01/16/2026	10000	345090.55
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	03/19/2026	10000	358024.17
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	03/23/2026	10000	390000.00
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	03/26/2026	5000	204000.00
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	04/01/2026	5000	210000.00
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	04/06/2026	5000	202650.00
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	04/08/2026	5000	216350.00
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	04/09/2026	5000	220000.00
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	04/13/2026	5000	225000.00
Frank K. Lee 15 Secor Road Brookfield CT 06804	Common	04/15/2026	10000	451000.00

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)