Telos (TLS) insider has 1,382 shares withheld for taxes

Rhea-AI Filing Summary

At Telos Corp, officer Donald Joseph Terreri reported a tax-related share disposition. On 2026-08-14, the company withheld 1,382 shares of common stock at $4.54 per share to satisfy his tax withholding obligation arising from the vesting of performance stock units. No shares were sold to any third party as part of this event. After the transaction, he held 33,483 shares directly and 923.96 shares indirectly through a 401K account.

Insider Trade Summary

Net Seller: 1,382 shares

Net Sell 2 txns

Insider Terreri Donald Joseph

Role Controller, Chief Acct Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	1,382	$4.54	$6K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 33,483 shares (Direct); Common Stock — 923.96 shares (Indirect, Held in 401K)

Footnotes (1)

1. F1. Telos withheld 1,382 shares of its common stock to satisfy the reporting person's tax withholding obligation resulting from the vesting of the performance stock units. The reporting person did not sell any shares of Telos stock to a third party as part of this transaction.

Key Figures

Shares withheld for taxes: 1,382 shares Withholding price per share: $4.54 per share Direct holdings after transaction: 33,483 shares +1 more

4 metrics

Shares withheld for taxes 1,382 shares Common stock withheld on 2026-08-14 to satisfy tax withholding obligation

Withholding price per share $4.54 per share Implied value used for the 1,382 withheld common shares

Direct holdings after transaction 33,483 shares Direct Telos common stock held by Donald Terreri following the transaction

Indirect 401K holdings after transaction 923.96 shares Indirect Telos common stock held in a 401K account after the transaction

Key Terms

performance stock units, tax withholding obligation, indirect, 401K

4 terms

performance stock units financial

"resulting from the vesting of the performance stock units."

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

tax withholding obligation financial

"to satisfy the reporting person's tax withholding obligation"

indirect financial

"Indirect ownership marked as Held in 401K"

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.

FAQ

What insider transaction did TLS officer Donald Terreri report on this Form 4?

Donald Terreri reported that 1,382 shares of Telos common stock were withheld on 2026-08-14 to cover his tax withholding obligation from vesting performance stock units, rather than being sold in the open market.

Did Telos Corp (TLS) insider Donald Terreri sell any shares to third parties?

No. The filing states that the 1,382 shares were withheld by Telos to satisfy tax withholding obligations, and that the reporting person did not sell any shares of Telos stock to a third party in this transaction.

How many Telos (TLS) shares does Donald Terreri hold after the reported transaction?

Following the tax-withholding transaction, Donald Terreri directly held 33,483 Telos common shares and indirectly held 923.96 shares in a 401K account, according to the ownership figures reported in the Form 4.

What was the implied price used for the Telos (TLS) tax-withholding shares?

The tax-withholding transaction used a price of $4.54 per share for the 1,382 shares of Telos common stock withheld to satisfy the reporting person’s tax withholding obligation associated with vesting performance stock units.

Is the Telos (TLS) Form 4 transaction related to option exercise or performance stock units?

The Form 4 links the tax-withholding to vesting of performance stock units. Telos withheld 1,382 shares of common stock to cover the insider’s tax withholding obligation arising from that vesting event.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/17/2026 - 04:19 PM Accepted by SEC EDGAR 08/17/2026 - 04:18 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^*

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)
08/14/2026

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	08/14/2026		F		1,382	D	$4.54(1)	33,483	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. Telos withheld 1,382 shares of its common stock to satisfy the reporting person's tax withholding obligation resulting from the vesting of the performance stock units. The reporting person did not sell any shares of Telos stock to a third party as part of this transaction.

Remarks:

	/s/ Helen M. Oh, attorney-in-fact	08/17/2026
	** 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)