Palomar CEO sells 3,500 shares in plan trade

Rhea-AI Filing Summary

Palomar Holdings, Inc. (PLMR) director and CEO Mac Armstrong reported the sale of a total of 3,500 shares of common stock on September 21, 2026, in open-market transactions by the Armstrong Family Trust at weighted average prices of $134.5956 and $135.5670, under a Rule 10b5-1 trading plan. After these transactions, Armstrong reports 160,166 shares of Palomar common stock held directly, which include 2,852 shares acquired through the 2019 Employee Stock Purchase Plan.

Insider Trade Summary 10b5-1

Net Seller: 3,500 shares

Net Sell 3 txns

Insider Armstrong Mac

Role CEO and Chairman

Sold 3,500 shs ($472K)

Type	Security	Shares	Price	Value
Sale	Common Stock F2	2,100	$134.5956	$283K
Sale	Common Stock F2	1,400	$135.567	$190K
holding	Common Stock F1	--	--	--

Holdings After Transaction: Common Stock — 318,888 shares (Indirect, By Armstrong Family Trust); Common Stock — 160,166 shares (Direct)

Footnotes (2)

1. F1. Includes 2,852 shares purchased pursuant to the Palomar Holdings, Inc. 2019 Employee Stock Purchase Plan (ESPP).
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $134.1100 to $135.0800 (weighted average of $134.5956), inclusive; $135.1800 to $135.9800 (weighted average of $135.5670). The Reporting Person undertakes to provide to Palomar Holdings, Inc., any security holder of Palomar Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.

Key Figures

Shares sold (first block): 2,100 shares Weighted average sale price (first block): $134.5956 per share Shares sold (second block): 1,400 shares +4 more

7 metrics

Shares sold (first block) 2,100 shares Common stock sold on September 21, 2026 by Armstrong Family Trust

Weighted average sale price (first block) $134.5956 per share Weighted average price for 2,100 shares sold in multiple trades

Shares sold (second block) 1,400 shares Common stock sold on September 21, 2026 by Armstrong Family Trust

Weighted average sale price (second block) $135.5670 per share Weighted average price for 1,400 shares sold in multiple trades

Total shares sold 3,500 shares Aggregate of both sale transactions reported for September 21, 2026

Shares held directly after transactions 160,166 shares Direct common stock holdings reported after the September 21, 2026 trades

ESPP shares included in holdings 2,852 shares Portion of direct holdings purchased under the 2019 Employee Stock Purchase Plan

Key Terms

Rule 10b5-1, weighted average price, Employee Stock Purchase Plan (ESPP), indirect ownership

4 terms

Rule 10b5-1 regulatory

"The Form 4 indicates the transactions were made under a Rule 10b5-1 trading plan"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Employee Stock Purchase Plan (ESPP) financial

"Includes 2,852 shares purchased pursuant to the Palomar Holdings, Inc. 2019 Employee Stock Purchase Plan (ESPP)"

indirect ownership financial

"Ownership type for the sold shares is reported as indirect by Armstrong Family Trust"

FAQ

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

What insider transaction did PLMR CEO Mac Armstrong report?

Mac Armstrong reported selling 3,500 shares of Palomar Holdings, Inc. common stock on September 21, 2026, in open-market transactions executed by the Armstrong Family Trust at weighted average prices of $134.5956 and $135.5670, pursuant to a Rule 10b5-1 trading plan.

At what prices were the PLMR shares sold in this Form 4?

The filing reports weighted average sale prices of $134.5956 for 2,100 shares and $135.5670 for 1,400 shares. The footnote states these resulted from multiple trades in ranges of $134.11–$135.08 and $135.18–$135.98, respectively.

How many PLMR shares does Mac Armstrong hold after these transactions?

After the reported transactions, Mac Armstrong reports holding 160,166 shares of Palomar common stock directly. A footnote explains this includes 2,852 shares purchased through the Palomar Holdings, Inc. 2019 Employee Stock Purchase Plan.

Were the September 21, 2026 PLMR stock sales under a Rule 10b5-1 plan?

Yes. The Form 4 indicates that the transactions were made under a Rule 10b5-1 trading plan, as reflected by the affirmative Rule 10b5-1 checkbox. This means the trades were executed pursuant to a pre-established trading arrangement.

Who executed the PLMR share sales reported in this Form 4?

The 3,500 PLMR shares were sold indirectly by the Armstrong Family Trust. The Form 4 lists Mac Armstrong’s ownership of those sold shares as indirect with the nature of ownership described as “By Armstrong Family Trust.”

What portion of Mac Armstrong’s PLMR holdings came from the ESPP?

A footnote states that his reported direct holdings of 160,166 shares include 2,852 shares purchased under the Palomar Holdings, Inc. 2019 Employee Stock Purchase Plan (ESPP).

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

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Available on EDGAR 09/22/2026 - 04:16 PM Accepted by SEC EDGAR 09/22/2026 - 04:15 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).

X

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^*

Armstrong Mac

(Last) (First) (Middle)

7979 IVANHOE AVENUE, SUITE 500

(Street)

LA JOLLA CALIFORNIA 92037

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Palomar Holdings, Inc. [ PLMR ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/21/2026

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								160,166(1)	D
Common Stock	09/21/2026		S		2,100	D	$134.5956(2)	320,288	I	By Armstrong Family Trust
Common Stock	09/21/2026		S		1,400	D	$135.567(2)	318,888	I	By Armstrong Family Trust

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. Includes 2,852 shares purchased pursuant to the Palomar Holdings, Inc. 2019 Employee Stock Purchase Plan (ESPP).

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $134.1100 to $135.0800 (weighted average of $134.5956), inclusive; $135.1800 to $135.9800 (weighted average of $135.5670). The Reporting Person undertakes to provide to Palomar Holdings, Inc., any security holder of Palomar Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.

Remarks:

	/s/ Angela Grant, Attorney-in-Fact	09/22/2026
	** 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)