Donnelley Financial (NYSE: DFIN) director now holds 57,608 shares

Rhea-AI Filing Summary

Aguilar Luis A reported acquisition or exercise transactions in this Form 4 filing.

Donnelley Financial Solutions director Luis A. Aguilar received a grant of 4,265 shares of common stock as restricted stock units (RSUs). These RSUs were issued under a Rule 16b-3 plan and are payable in common shares on the first anniversary of the grant date or when he ceases to be a director, if earlier.

Following this grant, Aguilar has beneficial ownership of 57,608 shares, including 38,878 shares held directly and 18,730 RSUs. This is a compensation-related equity award rather than an open-market purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Aguilar Luis A

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	4,265	$0.00	--

Holdings After Transaction: Common Stock — 57,608 shares (Direct, null)

Footnotes (1)

1. Company granted restricted stock units ("RSUs") issued pursuant to a Rule 16b-3 plan. The RSUs are payable in shares of common stock on the first anniversary of the grant date or when the reporting person ceases to be a director, if earlier. Additionally, the reporting person may defer payment of any vesting of shares until the date such person ceases to be a director. Includes 38,878 shares held directly and 18,730 restricted stock units.

Key Figures

RSUs granted: 4,265 shares Total shares after grant: 57,608 shares Directly held shares: 38,878 shares +2 more

5 metrics

RSUs granted 4,265 shares Restricted stock units granted to director on May 13, 2026

Total shares after grant 57,608 shares Aguilar’s beneficial ownership following the grant

Directly held shares 38,878 shares Common stock held directly by Aguilar

Existing RSUs 18,730 RSUs Restricted stock units included in total beneficial ownership

Grant price $0.00 per share Equity award granted as compensation, not purchased in market

Key Terms

restricted stock units, RSUs, Rule 16b-3 plan, beneficial ownership

4 terms

restricted stock units financial

"Company granted restricted stock units ("RSUs") issued pursuant to a Rule 16b-3 plan."

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

"Includes 38,878 shares held directly and 18,730 restricted stock units."

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.

Rule 16b-3 plan regulatory

"Company granted restricted stock units ("RSUs") issued pursuant to a Rule 16b-3 plan."

beneficial ownership financial

"Includes 38,878 shares held directly and 18,730 restricted stock units."

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

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^*

Aguilar Luis A

(Last) (First) (Middle)

C/O DONNELLEY FINANCIAL SOLUTIONS

391 STEEL WAY

(Street)

LANCASTER PENNSYLVANIA 17601

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Donnelley Financial Solutions, Inc. [ DFIN ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026

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	05/13/2026		A		4,265	A	(1)	57,608(2)	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. Company granted restricted stock units ("RSUs") issued pursuant to a Rule 16b-3 plan. The RSUs are payable in shares of common stock on the first anniversary of the grant date or when the reporting person ceases to be a director, if earlier. Additionally, the reporting person may defer payment of any vesting of shares until the date such person ceases to be a director.

2. Includes 38,878 shares held directly and 18,730 restricted stock units.

	William Zola, pursuant to power of attorney	05/15/2026
	** 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 did DFIN director Luis Aguilar receive in this Form 4 report?

Luis Aguilar received a grant of 4,265 restricted stock units (RSUs) in Donnelley Financial Solutions common stock. These equity awards are part of his director compensation, not an open-market stock purchase or sale, and will settle in shares upon vesting.

How many Donnelley Financial (DFIN) shares does Luis Aguilar now beneficially own?

After the reported grant, Luis Aguilar beneficially owns 57,608 Donnelley Financial shares. This total includes 38,878 shares held directly and 18,730 restricted stock units that will convert into common stock when vesting conditions are met.

When do Luis Aguilar’s new DFIN restricted stock units vest?

The 4,265 Donnelley Financial RSUs are payable in common stock on the first anniversary of the grant date or when Aguilar ceases to be a director, if earlier. He may also defer payment of any vesting until he leaves the board.

Are Luis Aguilar’s DFIN RSUs part of a specific compensation plan?

Yes. The restricted stock units were granted under a Rule 16b-3 plan, which is a board-approved compensation arrangement. Such plans are designed to govern equity awards to insiders like directors in a structured, pre-authorized manner.

Did Luis Aguilar buy or sell Donnelley Financial (DFIN) shares on the market?

No open-market buy or sell occurred here. The Form 4 shows a grant of 4,265 RSUs at a price of $0.00 per share, reflecting a stock-based compensation award rather than a discretionary market transaction by Aguilar.