STLN · Starling Oncology, Inc. · Insider Trading

Represents a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.37 to $6.75 per share. Upon request by the SEC, the Issuer or a stockholder of the Issuer, complete information regarding the number of shares sold at each price within the range will be provided.

The sale of these call options is a matchable transaction subject to Section 16(b) of the Securities Exchange Act of 1934. The reporting person has calculated a short-swing profit in connection with such matchable transactions, which the reporting person intends to disgorge to the Issuer.

Represents grant of restricted stock units (RSUs), each of which entitle the Reporting Person to receive one share of the Issuer's common stock upon settlement. The RSUs vest in full on the date of the Issuer's 2027 annual meeting of stockholders, subject to the Reporting Person's continued service with the Issuer on the vesting date.

Represents grant of restricted stock units (RSUs), each of which entitle the Reporting Person to receive one share of the Issuer's common stock upon settlement. The RSUs vest in full on the date of the Issuer's 2027 annual meeting of stockholders, subject to the Reporting Person's continued service with the Issuer on the vesting date.

Represents grant of restricted stock units (RSUs), each of which entitle the Reporting Person to receive one share of the Issuer's common stock upon settlement. The RSUs vest in full on the date of the Issuer's 2027 annual meeting of stockholders, subject to the Reporting Person's continued service with the Issuer on the vesting date.

Represents grant of restricted stock units (RSUs), each of which entitle the Reporting Person to receive one share of the Issuer's common stock upon settlement. The RSUs vest in full on the date of the Issuer's 2027 annual meeting of stockholders, subject to the Reporting Person's continued service with the Issuer on the vesting date.

Represents grant of restricted stock units (RSUs), each of which entitle the Reporting Person to receive one share of the Issuer's common stock upon settlement. The RSUs vest in full on the date of the Issuer's 2027 annual meeting of stockholders, subject to the Reporting Person's continued service with the Issuer on the vesting date.

Represents grant of restricted stock units (RSUs), each of which entitle the Reporting Person to receive one share of the Issuer's common stock upon settlement. The RSUs vest in full on the date of the Issuer's 2027 annual meeting of stockholders, subject to the Reporting Person's continued service with the Issuer on the vesting date.

Represents grant of restricted stock units (RSUs), each of which entitle the Reporting Person to receive one share of the Issuer's common stock upon settlement. The RSUs vest in full on the date of the Issuer's 2027 annual meeting of stockholders, subject to the Reporting Person's continued service with the Issuer on the vesting date.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $5.27 to $5.28, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.

The sale transactions were effected pursuant to a Rule 10(b) 5-1 trading plan adopted by the Reporting Person on 08/26/2025.

The sales reported in Table I reflect shares acquired upon exercise of the options identified in Table II, sold on the same day pursuant to the 10(b) 5-1 plan referenced in Footnote 1.

The stock options described above were originally granted on 11/17/2022 and 05/21/2024, respectively, and vested in accordance with their respective terms.

The sale transactions were effected pursuant to a Rule 10(b) 5-1 trading plan adopted by the Reporting Person on 08/26/2025.

The sales reported in Table I reflect shares acquired upon exercise of the options identified in Table II, sold on the same day pursuant to the 10(b) 5-1 plan referenced in Footnote 1.

The stock options described above were originally granted on 11/17/2022 and 05/21/2024, respectively, and vested in accordance with their respective terms.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $5.82 to $5.90, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.

Represents RSU award that was fully vested upon grant

Represents RSU award that was fully vested upon grant.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $5.02 to $5.04, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.

Price is the volume weighted average selling price of all sales on behalf of the Reporting Person on June 8, 2028 within a one-dollar range. Actual prices ranged from $5.35 to $5.42. The Reporting Person hereby undertakes to provide upon request of the Commission staff full information regarding the number of shares sold at each separate price.

Sales were made on behalf of the Reporting Person pursuant to the Rule 10b5-1(c) plan that was adopted on 08/26/2025.

The Issuer executed the sale to cover the tax liabilities arising from the vesting of an RSU award made on May 21, 2024.

The Issuer executed the sale to cover the tax liabilities arising from the vesting of an RSU award made on May 21, 2024.

The Issuer executed the sale to cover the tax liabilities arising from the vesting of an RSU award made on May 21, 2024.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $4.05 to $4.10, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.

Represents shares sold pursuant to a Rule 10b5-1 plan adopted by the reporting person on December 16, 2025.

Price of $3.5005 was the volume weighted average selling price of all sales by the reporting person on April 16, 2026 within a one-dollar range. Actual prices ranged from $3.5000 to $3.5050. The reporting person hereby undertakes to provide upon request of the Commission staff full information regarding the number of shares sold at each separate price.

Represents shares sold pursuant to a Rule 10b5-1 plan adopted by the reporting person on December 16, 2025.

Price of $3.5017 was the volume weighted average selling price of all sales by the reporting person on April 14, 2026 within a one-dollar range. Actual prices ranged from $3.5000 to $3.5300. The reporting person hereby undertakes to provide upon request of the Commission staff full information regarding the number of shares sold at each separate price.

Represents RSU awards with 1/4 of the RSUs vesting on the first anniversary of the Vesting Commencement Date, with the remaining RSUs vesting in three equal annual installments beginning on the first anniversary of the Vesting Commencement Date, with all RSUs becoming vested on the fourth anniversary of the Vesting Commencement Date, subject to continued service with the Company through such vesting dates

The Issuer executed the sale to cover the tax liabilities arising from the vesting of an RSU award on March 31, 2026

The Issuer executed the sale to cover the tax liabilities arising from the vesting of an RSU award on March 31, 2026.

Represents RSU awards with 1/4 of the RSUs vesting on the first anniversary of the Vesting Commencement Date, with the remaining RSUs vesting in three equal annual installments beginning on the first anniversary of the Vesting Commencement Date, with all RSUs becoming vested on the fourth anniversary of the Vesting Commencement Date, subject to continued service with the Company through such vesting dates.

The Issuer executed the sale to cover the tax liabilities arising from the vesting of an RSU award on March 31, 2026.

Represents RSU awards with 1/4 of the RSUs vesting on the first anniversary of the Vesting Commencement Date, with the remaining RSUs vesting in three equal annual installments beginning on the first anniversary of the Vesting Commencement Date, with all RSUs becoming vested on the fourth anniversary of the Vesting Commencement Date, subject to continued service with the Company through such vesting dates.

Represents RSU awards with 1/4 of the RSUs vesting on the first anniversary of the Vesting Commencement Date, with the remaining RSUs vesting in three equal annual installments beginning on the first anniversary of the Vesting Commencement Date, with all RSUs becoming vested on the fourth anniversary of the Vesting Commencement Date, subject to continued service with the Company through such vesting dates.

Represents RSU awards with 1/4 of the RSUs vesting on the first anniversary of the Vesting Commencement Date, with the remaining RSUs vesting in three equal annual installments beginning on the first anniversary of the Vesting Commencement Date, with all RSUs becoming vested on the fourth anniversary of the Vesting Commencement Date, subject to continued service with the Company through such vesting dates.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $3.11 to $3.19, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $3.04 to $3.15, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $3.33 to $3.35, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.

The Issuer executed the sale to cover the tax liabilities arising from the vesting of an RSU award on March 17, 2026.

The Issuer executed the sale to cover the tax liabilities arising from the vesting of an RSU award on March 17, 2026.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $3.39 to $3.49, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.

The Issuer executed the sale to cover the tax liabilities arising from the vesting of an RSU award on March 17, 2026.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $3.25 to $3.43, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.

The price reported in Column 4 is a weighted average price, rounded to the nearest cent. These shares were purchased in multiple transactions at prices ranging from $2.77 to $3.34, rounded to the nearest cent, inclusive. Mr. Chernett undertakes to provide the Issuer and any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price such shares were purchased.