Otter Tail CFO receives 800 restricted stock units

Otter Tail Corp VP and CFO Tyler J. Nelson received a grant of 800 restricted stock units on Common Stock on 2026-04-13 as compensation.

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Form Type

Rhea-AI Filing Summary

Otter Tail Corp VP and CFO Tyler J. Nelson received a grant of 800 restricted stock units on Common Stock on 2026-04-13 as compensation. The award has a zero exercise price and each unit represents a contingent right to receive one share of Otter Tail Corporation stock.

According to the filing, these restricted stock units vest in four equal annual installments beginning 2027-02-06 and four years from the dates shown for certain prior awards. After the reported transactions, Nelson holds 4,355 shares of Common Stock directly, including shares acquired through the Employee Stock Purchase Plan and restricted stock unit distributions, as well as multiple outstanding restricted stock unit awards.

Insider Trade Summary

Grant/Award: 800 shares

Grant/Award 6 txns

Insider Nelson Tyler J

Role VP, Chief Financial Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	800	$0.00	$0.00
holding	Restricted Stock Units	--	--	--
holding	Restricted Stock Units	--	--	--
holding	Restricted Stock Units	--	--	--
holding	Restricted Stock Units	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 3,900 contracts for 3,100 underlying shares (Direct); Common Stock — 4,355 shares (Direct)

Footnotes (4)

F1. Total direct holdings include shares acquired through the Employee Stock Purchase Plan and shares acquired pursuant to restricted stock unit distributions
F2. Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation stock.
F3. The restricted stock units vest in four equal annual installments beginning the date shown above.
F4. Restricted stock units vest four years from date shown above

Key Figures

RSU grant size: 800 restricted stock units Exercise price of RSUs: $0.00 per unit Common shares held: 4,355 shares +4 more

7 metrics

RSU grant size 800 restricted stock units Grant to VP, Chief Financial Officer on 2026-04-13

Exercise price of RSUs $0.00 per unit Restricted stock unit grant on 2026-04-13

Common shares held 4,355 shares Direct Common Stock holdings following reported transactions

2023 RSU underlying shares 600 shares Restricted stock units with exercise date 2023-04-08

2024 RSU underlying shares (grant 1) 1,400 shares Restricted stock units with exercise date 2024-04-08

2024 RSU underlying shares (grant 2) 550 shares Restricted stock units with exercise date 2024-04-08

2025 RSU underlying shares 550 shares Restricted stock units with exercise date 2025-04-08

Key Terms

Restricted Stock Units, contingent right, Employee Stock Purchase Plan, vest in four equal annual installments, +1 more

5 terms

Restricted Stock Units financial

"security_title: "Restricted Stock Units" and footnote explaining each unit is a contingent right"

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.

contingent right financial

"Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation stock."

Employee Stock Purchase Plan financial

"Total direct holdings include shares acquired through the Employee Stock Purchase Plan and shares acquired pursuant to restricted stock unit distributions"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

vest in four equal annual installments financial

"The restricted stock units vest in four equal annual installments beginning the date shown above."

direct ownership financial

"total_shares_following_transaction: "4355.0000" with ownership_type: "direct" and ownership_code: "D""

FAQ

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What insider transaction did Otter Tail Corp (OTTR) report for its CFO?

Otter Tail Corp reported that VP and Chief Financial Officer Tyler J. Nelson received a grant of 800 restricted stock units. These units are a form of equity compensation that convert into Common Stock over time, aligning his interests with long-term shareholder value.

How many restricted stock units did the Otter Tail (OTTR) CFO receive and on what terms?

The CFO received 800 restricted stock units tied to Otter Tail Common Stock at an exercise price of $0.00. Each restricted stock unit represents a contingent right to receive one share of stock, delivering full share value without any cash payment on vesting.

What is the vesting schedule for the Otter Tail (OTTR) CFO’s new restricted stock units?

The 800 restricted stock units vest in four equal annual installments beginning 2027-02-06. This multi-year vesting schedule encourages continued service, as Nelson must remain with the company over time to receive the full number of underlying Common Stock shares.

How many Otter Tail (OTTR) common shares does the CFO hold after this Form 4 filing?

After the reported transactions, the CFO holds 4,355 shares of Otter Tail Common Stock directly. Footnotes state these direct holdings include shares acquired through the Employee Stock Purchase Plan and from previous restricted stock unit distributions, reflecting accumulated long-term equity participation.

What ongoing equity awards does the Otter Tail (OTTR) CFO have in addition to the new grant?

Beyond the new 800-unit award, the filing lists multiple restricted stock unit positions with underlying shares of 600, 1,400, 550 and 550. These positions, all with a zero exercise price, represent additional future Common Stock that may be delivered as vesting conditions are satisfied.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 04/15/2026 - 11:19 AM EDT

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^*

Nelson Tyler J

(Last)

(First)

(Middle)

215 SOUTH CASCADE STREET

(Street)

FERGUS FALLS

MINNESOTA

56537

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Otter Tail Corp [ OTTR ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/13/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock								4,355⁽¹⁾	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽²⁾	04/13/2026		A		800		02/06/2027⁽³⁾	⁽³⁾	Common Stock	800	$0	800	D
Restricted Stock Units	⁽²⁾							04/08/2023⁽⁴⁾	⁽⁴⁾	Common Stock	600		600	D
Restricted Stock Units	⁽²⁾							04/08/2024⁽⁴⁾	⁽⁴⁾	Common Stock	1,400		1,400	D
Restricted Stock Units	⁽²⁾							04/08/2024⁽⁴⁾	⁽⁴⁾	Common Stock	550		550	D
Restricted Stock Units	⁽²⁾							04/08/2025⁽⁴⁾	⁽⁴⁾	Common Stock	550		550	D

Explanation of Responses:

1. Total direct holdings include shares acquired through the Employee Stock Purchase Plan and shares acquired pursuant to restricted stock unit distributions

2. Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation stock.

3. The restricted stock units vest in four equal annual installments beginning the date shown above.

4. Restricted stock units vest four years from date shown above

Remarks:

	/s/ Tyler J. Nelson by James A VerSteeg, Attorney-in-Fact	04/15/2026
	** 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)

Source: View Original Filing on SEC EDGAR