FiEE CFO Yu Cao awarded 143,561 RSUs

Yu Cao reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Yu Cao reported acquisition or exercise transactions in this Form 4 filing.

FiEE, Inc. director and Chief Financial Officer Yu Cao received an equity grant of 143,561 restricted stock units (RSUs), each representing one future share of common stock. The award is compensation with no cash paid by Cao.

The RSUs vest over three years, with 30% vesting on the first anniversary of the May 12, 2026 grant date, another 30% on the second anniversary, and the remaining 40% on the third anniversary, conditioned on continued employment. Following this grant, Cao holds 1,728,927 shares of FiEE common stock directly.

Insider Trade Summary

Grant/Award: 143,561 shares

Grant/Award 1 txn

Insider Yu Cao

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	143,561	$0.00	$0.00

Holdings After Transaction: Common Stock — 1,728,927 shares (Direct)

Footnotes (1)

1. F1. Represents an award of restricted stock units (collectively, the "RSUs" and each, an "RSU"). Each RSU represents a contingent right to receive one share of the Issuer's common stock. These RSUs vest as follows: 30% on the first anniversary of the grant date, 30% on the second anniversary of the grant date, and the remaining 40% on the third anniversary of the grant date, subject to the Reporting Person's continued employment through each applicable vesting date.

Key Figures

RSUs granted: 143,561 units Grant price: $0.00 per unit Shares held after grant: 1,728,927 shares +3 more

6 metrics

RSUs granted 143,561 units Restricted stock unit award to Yu Cao on May 12, 2026

Grant price $0.00 per unit Equity compensation award, no cash paid by insider

Shares held after grant 1,728,927 shares Yu Cao’s direct FiEE common stock holdings following the RSU grant

First-year vesting portion 30% of 143,561 RSUs Vests on first anniversary of May 12, 2026 grant date

Second-year vesting portion 30% of 143,561 RSUs Vests on second anniversary of May 12, 2026 grant date

Third-year vesting portion 40% of 143,561 RSUs Vests on third anniversary of May 12, 2026 grant date

Key Terms

restricted stock units, RSUs, contingent right, vest, +1 more

5 terms

restricted stock units financial

"Represents an award of restricted stock units (collectively, the "RSUs" and each, an "RSU")."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

RSUs financial

"Each RSU represents a contingent right to receive one share of the Issuer's common stock."

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

contingent right financial

"Each RSU represents a contingent right to receive one share of the Issuer's common stock."

vest financial

"These RSUs vest as follows: 30% on the first anniversary of the grant date, 30% on the second anniversary of the grant date, and the remaining 40% on the third anniversary of the grant date"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

continued employment financial

"subject to the Reporting Person's continued employment through each applicable vesting date."

Continued employment means that an individual remains in their current job without interruption. For investors, it signals stability and ongoing work that can affect company performance and future prospects. Like a steady heartbeat for a business, sustained employment helps ensure consistent operations and financial health.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did FiEE (FIEE) report for Yu Cao?

FiEE reported that Chief Financial Officer Yu Cao received a grant of 143,561 restricted stock units. Each RSU represents a contingent right to one share of common stock as part of his equity compensation package, with vesting spread over three years.

How many FiEE (FIEE) shares does Yu Cao hold after this grant?

After the RSU award, Yu Cao directly holds 1,728,927 shares of FiEE common stock. This figure includes the effect of the 143,561 restricted stock units granted on May 12, 2026, which will convert into shares as they vest over time.

What is the vesting schedule for Yu Cao’s new FiEE (FIEE) RSUs?

Yu Cao’s 143,561 FiEE RSUs vest 30% on the first anniversary of the May 12, 2026 grant date, 30% on the second anniversary, and 40% on the third anniversary. Vesting requires his continued employment on each applicable vesting date.

Did Yu Cao pay anything for the newly granted FiEE (FIEE) RSUs?

No cash payment was made for the new RSUs, which were granted at a reported price of $0.00 per unit. These restricted stock units are an equity-based compensation award, providing future shares if vesting conditions are satisfied.

What does each restricted stock unit (RSU) in FiEE (FIEE) represent?

Each FiEE restricted stock unit for Yu Cao represents a contingent right to receive one share of the company’s common stock. Shares are delivered only as the RSUs vest over the three-year schedule, assuming continued employment through each vesting date.

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

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Accepted by SEC EDGAR 05/14/2026 - 05:54 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Yu Cao

(Last) (First) (Middle)

C/O FIEE, INC.

3-33, 2-CHOME UTAJIMA, NISHIYODOGAWA DST

(Street)

OSAKA

(City) (State) (Zip)

JAPAN

(Country)

2. Issuer Name and Ticker or Trading Symbol
FiEE, Inc. [ FIEE ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/12/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/12/2026		A(1)		143,561(1)	A	$0	1,728,927	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents an award of restricted stock units (collectively, the "RSUs" and each, an "RSU"). Each RSU represents a contingent right to receive one share of the Issuer's common stock. These RSUs vest as follows: 30% on the first anniversary of the grant date, 30% on the second anniversary of the grant date, and the remaining 40% on the third anniversary of the grant date, subject to the Reporting Person's continued employment through each applicable vesting date.

	/s/ Cao Yu	05/14/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)