Telos (TLS) officer receives 13,288-share restricted stock grant

Rhea-AI Filing Summary

Terreri Donald Joseph reported acquisition or exercise transactions in this Form 4 filing.

Telos Corp executive Donald Joseph Terreri reported a new stock grant. He received 13,288 shares of common stock as a grant with a reported price of $0.00 per share, reflecting a compensation-related award rather than an open-market purchase or sale.

After this grant, Terreri directly holds 34,865 shares of Telos common stock. He also indirectly holds 923.96 shares through a 401K plan. The footnote explains these are restricted share units that are subject to forfeiture and will vest in three equal installments on May 26, 2027, May 26, 2028, and May 26, 2029, when they will be settled in Telos common stock.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Terreri Donald Joseph

Role Controller, Chief Acct Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	13,288	$0.00	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 34,865 shares (Direct, null); Common Stock — 923.96 shares (Indirect, Held in 401K)

Footnotes (1)

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Key Figures

Restricted share unit grant: 13,288 shares Grant price: $0.00 per share Direct holdings after grant: 34,865 shares +2 more

5 metrics

Restricted share unit grant 13,288 shares Common stock grant reported with code A

Grant price $0.00 per share Reported price for the 13,288-share award

Direct holdings after grant 34,865 shares Total Telos common stock directly held post-transaction

Indirect 401K holdings 923.96 shares Common stock held indirectly in a 401K plan

Vesting dates May 26, 2027/2028/2029 Three equal vesting installments for the RSU award

Key Terms

restricted share units, subject to forfeiture, vest, 401K

4 terms

restricted share units financial

"These shares of common stock represent restricted share units granted pursuant to an award agreement"

Restricted share units (RSUs) are a promise from a company to give an employee or service provider actual shares or cash equal to the shares after certain conditions are met, typically staying with the company for a set time or hitting performance targets. Think of them like a time-locked gift card that becomes usable only after you’ve earned it. For investors, RSUs matter because they align employee incentives with company performance and can increase the number of shares outstanding over time, diluting existing ownership and affecting earnings per share.

subject to forfeiture financial

"represent restricted share units granted ... and are subject to forfeiture"

vest financial

"The restricted share units awarded will vest and be settled in shares"

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.

401K financial

"nature_of_ownership": "Held in 401K""

An employer-sponsored retirement savings plan in the United States that lets workers set aside part of their paycheck into investments with tax advantages; some plans also include employer matching contributions, which is like free money added to your savings. It matters to investors because 401(k) balances represent a large pool of household retirement assets that influence personal financial security, investor behavior, and long-term demand for stocks and bonds.

Form 4 Insider Transactions: What Each Field Means →

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^*

Terreri Donald Joseph

(Last) (First) (Middle)

C/O TELOS CORPORATION

19886 ASHBURN ROAD

(Street)

ASHBURN VIRGINIA 20147

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
TELOS CORP [ TLS ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Controller, Chief Acct Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/26/2026

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	05/26/2026		A		13,288(1)	A	$0	34,865	D
Common Stock								923.96	I	Held in 401K

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. These shares of common stock represent restricted share units granted pursuant to an award agreement between the reporting person and the Issuer and are subject to forfeiture. The restricted share units awarded will vest and be settled in shares of Issuer common stock in installments as follows: (1) one-third will vest on May 26, 2027; (2) one-third will vest on May 26, 2028; and (3) one-third will vest on May 26, 2029.

Remarks:

	/s/ Helen M. Oh, attorney-in-fact	05/27/2026
	** 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)

FAQ

What insider transaction did TLS officer Donald Terreri report?

Donald Terreri reported receiving a grant of 13,288 shares of Telos common stock as compensation. These are restricted share units, not an open-market trade, and they vest over time before settling in actual shares.

How many TLS shares does Donald Terreri hold after this Form 4?

Following the reported grant, Donald Terreri directly holds 34,865 shares of Telos common stock. He also indirectly holds 923.96 shares through a 401K account, giving a fuller picture of his reported equity exposure.

Are the 13,288 TLS shares granted to Terreri fully vested?

No, the 13,288 granted shares are restricted share units subject to forfeiture. The award vests in three equal installments on May 26, 2027, May 26, 2028, and May 26, 2029, and is then settled in Telos common stock.

Is Donald Terreri buying or selling TLS stock in this filing?

This filing shows an acquisition via grant, not a market buy or sell. The Form 4 lists a compensation-related award of 13,288 restricted share units at a reported price of $0.00 per share, with no open-market transaction disclosed.

How is Donald Terreri’s TLS ownership structured in this Form 4?

The filing shows direct ownership of 34,865 Telos shares after the grant and indirect ownership of 923.96 shares held in a 401K plan. This distinguishes personal holdings from retirement-plan holdings.

What does “subject to forfeiture” mean for the TLS restricted share units?

“Subject to forfeiture” means the 13,288 restricted share units can be lost if vesting conditions are not met. The units only convert into Telos common stock as they vest on the specified future dates.