Changes in Beneficial Ownership · 4
Standard Nuclear, Inc.
STDNNYSEEQUITYCurrent
Changes in Beneficial Ownership
Structured filing — 4
wk-form4_1792410373.xml
Filing details
- Report period
- 2026-10-17
- Issuer
- Standard Nuclear, Inc.
- Issuer CIK
- 0002086716
- Trading symbol
- STDN
Reporting owner 1
- Name
- HARRILL KEVIN J
- Reporting owner CIK
- 0001920896
- Relationship
- Officer
- Officer title
- Chief Financial Officer
- Address
- C/O STANDARD NUCLEAR, INC., 200 EUROPIA AVE, OAK RIDGE, TN, 37830
Non-derivative transactions
| Security | Transaction date | Code | Amount | A / D | Price (USD) | Owned after | Ownership |
|---|---|---|---|---|---|---|---|
| Class A common stock | 2026-10-17 | F · Form 4[F1] | 32,715 | D | 12.17 | 1,555,444 | D |
Table key
- F · Form 4
- Securities delivered or withheld for exercise price or tax liability under Rule 16b-3
- D
- Direct
Footnotes
- F1
- Shares surrendered to the Company to satisfy tax withholding upon vesting of restricted stock units. Price is the closing price of the Class A common stock on the vesting date.↩ 1
Remarks
Exhibit 24 - Power of Attorney. The Reporting Person's Power of Attorney dated July 15, 2026 was previously submitted as a graphic with the Reporting Person's Form 3 filed July 15, 2026 and is filed herewith in text format.
Signature 1
- Signed
- /s/ Shahram Ghasemian, Attorney-in-fact for Kevin J. Harrill
- Date
- 2026-10-19
Filed exhibits
- EX-24 ↗standardnuclear-poakevin.htm
Company context
Standard Nuclear is a leading independent advanced nuclear fuel company and the only company in the United States with industrial-scale TRISO manufacturing facilities to date, based on our commercialized manufacturing capability supported by production-grade equipment, established processes, and facility infrastructure designed for sustained, high-throughput output and scalable expansion. We design, engineer, and manufacture advanced nuclear fuels with a primary focus on TRISO fuel that is utilized by advanced nuclear reactors, including some SMRs and microreactors, designed to be safer, more efficient, and more flexible than traditional nuclear reactors (“Advanced Reactors”), and we believe we are the only participant in the market that is currently positioned to be able to work with and develop fuel for any developer of Advanced Reactors which use TRISO fuel. As of the date of this prospectus, we operate the only dedicated, privately funded, industrial scale TRISO production line in the United States and are currently producing and shipping fuel for Advanced Reactor demonstrations scheduled for 2026, with additional TRISO production facilities expected to come online in the second half of 2026.