STOCK TITAN

[Form 4] BLACK HILLS CORP /SD/ Insider Trading Activity

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

BLACK HILLS CORP director Robert P. Otto reported an open-market sale of 4,109 shares of common stock at $74.2199 per share. After this transaction, he directly holds 10,885.9672 common shares.

The filing also shows an indirect holding of Phantom Stock Units held by a trust, representing 9,764.9995 underlying common shares on a 1-for-1 conversion ratio. These derivative securities are exercisable upon retirement and expire upon retirement under the terms of the agreement.

Positive

  • None.

Negative

  • None.
Insider Otto Robert P
Role Director
Sold 4,109 shs ($305K)
Type Security Shares Price Value
Sale Common Stock 4,109 $74.2199 $305K
holding Phantom Stock Unit -- -- --
Holdings After Transaction: Common Stock — 10,885.967 shares (Direct); Phantom Stock Unit — 9,765 shares (Indirect, By Trust)
Footnotes (1)
  1. 1 for 1 conversion ratio Derivative security is exercisable upon retirement under terms of the agreement. Derivative security expires upon retirement under terms of the agreement.
Shares sold 4,109 shares Open-market sale of common stock
Sale price $74.2199 per share Price for sold common shares
Direct holdings after sale 10,885.9672 shares Common stock directly owned post-transaction
Phantom units underlying shares 9,764.9995 shares Underlying common shares for phantom stock units
Conversion ratio 1-for-1 Phantom stock units to common stock
Exercise condition Upon retirement Phantom stock units exercisable and expiring at retirement
Phantom Stock Unit financial
"security_title: "Phantom Stock Unit""
open-market sale financial
"transaction_action: "open-market sale""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
conversion ratio financial
"footnote: "1 for 1 conversion ratio""
The conversion ratio is the number of common shares an investor receives when a convertible security (like a bond or preferred share) or an exchangeable instrument is turned into ordinary stock. It matters because it tells investors how much ownership or dilution will occur — similar to knowing how many slices you get when you trade in a coupon — and directly affects the value you get from the convertible and the company’s future share count.
derivative security financial
"footnote: "Derivative security is exercisable upon retirement""
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
indirect financial
"ownership_type: "indirect" for Phantom Stock Unit"
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SEC Form 4
FORM 4UNITED 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*
Otto Robert P

(Last)(First)(Middle)
PO BOX 1400

(Street)
RAPID CITY SOUTH DAKOTA 57709

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
BLACK HILLS CORP /SD/ [ BKH ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/27/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/27/2026S4,109D$74.219910,885.9672D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Phantom Stock Unit(1) (2) (3)Common Stock9,764.99959,764.9995IBy Trust
Explanation of Responses:
1. 1 for 1 conversion ratio
2. Derivative security is exercisable upon retirement under terms of the agreement.
3. Derivative security expires upon retirement under terms of the agreement.
Remarks:
/s/Travis Frederickson05/28/2026
** Signature of Reporting PersonDate
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)