OKLO · Oklo Inc.

The stock option vested as to 20% of the underlying shares on August 1, 2024 and continues to vest thereafter in 48 substantially equal monthly installments.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.51-$53.08 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities held by the Reporting Person's spouse.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $53.49-$54.30 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities beneficially owned by the Reporting Person's spouse.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $51.52- $52.51 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

This sale reported herein was effected pursuant to a Rule 10b5-1 plan adopted on September 22, 2025.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.51- $53.08 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $51.52- $52.51 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities held by the Reporting Person's spouse.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The stock option vested as to 20% of the underlying shares on August 1, 2024 and continues to vest thereafter in 48 substantially equal monthly installments.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $53.49- $54.30 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $53.08- $53.49 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $53.08- $53.49 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities beneficially owned by the Reporting Person's spouse.

Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

The restricted stock units vest in full on June 3, 2027.

Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

The restricted stock units vest in full on June 3, 2027.

Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

The restricted stock units vest in full on June 3, 2027.

Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

The restricted stock units vest in full on June 3, 2027.

Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

The restricted stock units vest in full on June 3, 2027.

Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

The restricted stock units vest in full on June 3, 2027.

Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

The restricted stock units vest in full on June 3, 2027.

Each restricted stock unit represents a contingent right to receive one share of the Issuer's Class A Common Stock.

The restricted stock units vest in full on June 3, 2027.

The stock option vested as to 20% of the underlying shares on August 1, 2024 and continues to vest thereafter in 48 substantially equal monthly installments.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.57 - $65.46 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities held by the Reporting Person's spouse.

The stock option vested as to 20% of the underlying shares on August 1, 2024 and continues to vest thereafter in 48 substantially equal monthly installments.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.94- $68.74 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities held by the Reporting Person's spouse.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.74- $69.35 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities beneficially owned by the Reporting Person's spouse.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.94- $68.74 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

This sale reported herein was effected pursuant to a Rule 10b5-1 plan adopted on September 22, 2025.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.57- $65.46 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The stock option vested as to 20% of the underlying shares on August 1, 2024 and continues to vest thereafter in 48 substantially equal monthly installments.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.74- $69.35 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.62- $67.62 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.38- $70.56 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities beneficially owned by the Reporting Person's spouse.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.62- $67.62 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities held by the Reporting Person's spouse.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.30- $69.34 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.60- $66.60 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities held by the Reporting Person's spouse.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.63- $67.94 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.35- $69.55 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.63- $67.94 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities held by the Reporting Person's spouse.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.38- $70.56 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.60- $66.60 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.35- $70.35 inclusive. The Reporting Person's spouse undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person's spouse, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents securities beneficially owned by the Reporting Person's spouse.

The sales reported herein were effected pursuant to a Rule 10b5-1 plan adopted on March 31, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.35- $70.35 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer 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 herein.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents shares donated as a gift by the Reporting Person to a donor-advised fund. After donation, the Reporting Person will have no control over, and will not be able to direct the disposition of, the donated shares by such donor-advised fund.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of the RSUs listed in Table II. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Class A Common Stock. On May 19, 2026, 20,686 RSUs were released to the Reporting Person.

On August 12, 2024, the Reporting Person was granted 248,227 RSUs, vesting as to one-third of the underlying shares on August 12, 2025 and thereafter in eight substantially equal quarterly installments.

Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Class A Common Stock. On May 19, 2026, 20,686 RSUs were released to the Reporting Person.

For more information about the equity of the Issuer held by the Reporting Person, please see the Issuer's most recent definitive proxy statement filed with the Securities and Exchange Commission.