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person · Reporting owner

Mazumdar Claire

Disclosed activity across 2 companies

Tapewire entity
24229
SEC CIK
0002034671

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Bicara Therapeutics Inc.BCAX · Entity 4673Director · Chief Executive OfficerAugust 10, 2026August 12, 2026
Relay Therapeutics, Inc.RLAY · Entity 4044DirectorJune 09, 2026June 10, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

Bicara Therapeutics Inc.

Report date August 10, 2026 · Filed August 12, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect362,152 Ending reported balance After 2026-08-10 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-08-10 · Exercise / conversion · Acquired 10,000 · Balance 372,152

F1: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

Row 2 · 2026-08-10 · Sale · Disposed 10,000 · Balance 362,152

F1: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

F2: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.58 to $28.30, 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 at which the transactions were effected.

Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $3.79 · Expires 2033-04-05Direct110,546 Reported balance After 2026-08-10 transaction · row 3 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 3 · 2026-08-10 · Exercise / conversion · Disposed 10,000 · Balance 110,546

F1: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

F3: The shares underlying this option vest in sixteen equal quarterly installments following April 5, 2023, subject to the Reporting Person's continued service on each such vesting date.

Filing footnotes · ownership attribution and instrument terms

F1: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

F2: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.58 to $28.30, 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 at which the transactions were effected.

F3: The shares underlying this option vest in sixteen equal quarterly installments following April 5, 2023, subject to the Reporting Person's continued service on each such vesting date.

Relay Therapeutics, Inc.

Report date June 09, 2026 · Filed June 10, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Stock Option (Right to Buy)SEC Table II · derivative / convertible security · Conversion / exercise price $14.09 · Expires 2036-06-08Direct32,947 Reported balance After 2026-06-09 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2026-06-09 · Grant · Acquired 32,947 · Balance 32,947

F1: This option was granted on June 9, 2026 with respect to 32,947 shares of the Issuer's common stock and vests in full on the earlier to occur of (a) the first anniversary of the grant date or (b) the date of the next annual meeting of stockholders following the grant date.

Filing footnotes · ownership attribution and instrument terms

F1: This option was granted on June 9, 2026 with respect to 32,947 shares of the Issuer's common stock and vests in full on the earlier to occur of (a) the first anniversary of the grant date or (b) the date of the next annual meeting of stockholders following the grant date.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
August 10, 2026 Filed Aug 12, 2026 20:19 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 10,000 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001470831-26-000813 · wk-form4_1786565953.xml · derivative · entry 3

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 110,546

Underlying: Common Stock · 10,000 shares

Expires 2033-04-05

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

F3 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following April 5, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
August 10, 2026 Filed Aug 12, 2026 20:19 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 10,000 $27.98 $279,750.00
Disclosure

SEC source: 0001470831-26-000813 · wk-form4_1786565953.xml · nonDerivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 362,152

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.58 to $28.30, 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 at which the transactions were effected.

Read SEC document
August 10, 2026 Filed Aug 12, 2026 20:19 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 10,000 $3.79 $37,898.00
Disclosure

SEC source: 0001470831-26-000813 · wk-form4_1786565953.xml · nonDerivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 372,152

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

Read SEC document
July 10, 2026 Filed Jul 14, 2026 20:22 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 10,000 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001470831-26-000714 · wk-form4_1784060551.xml · derivative · entry 4

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 120,546

Underlying: Common Stock · 10,000 shares

Expires 2033-04-05

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

F3 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following April 5, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
July 10, 2026 Filed Jul 14, 2026 20:22 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 28 $29.68 $831.04
Disclosure

SEC source: 0001470831-26-000714 · wk-form4_1784060551.xml · nonDerivative · entry 3

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 362,152

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

Read SEC document
July 10, 2026 Filed Jul 14, 2026 20:22 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 9,972 $28.42 $283,367.34
Disclosure

SEC source: 0001470831-26-000714 · wk-form4_1784060551.xml · nonDerivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 362,180

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.13 to $28.81, 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 at which the transactions were effected.

Read SEC document
July 10, 2026 Filed Jul 14, 2026 20:22 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 10,000 $3.79 $37,898.00
Disclosure

SEC source: 0001470831-26-000714 · wk-form4_1784060551.xml · nonDerivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 372,152

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2026.

Read SEC document
June 09, 2026 Filed Jun 10, 2026 20:30 UTC Relay Therapeutics, Inc. RLAY · Entity 4044 GrantStock Option (Right to Buy) · Derivative 32,947 $0.00 Strike: $14.09 $0.00
Disclosure

SEC source: 0001193125-26-265913 · ownership.xml · derivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,947

Underlying: Common Stock · 32,947 shares

Expires 2036-06-08

F1 · derivative.exercise_date: This option was granted on June 9, 2026 with respect to 32,947 shares of the Issuer's common stock and vests in full on the earlier to occur of (a) the first anniversary of the grant date or (b) the date of the next annual meeting of stockholders following the grant date.

Read SEC document
May 18, 2026 Filed May 20, 2026 20:07 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 15,000 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-036885 · wk-form4_1779307664.xml · derivative · entry 4

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 146,107

Underlying: Common Stock · 15,000 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F4 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
May 18, 2026 Filed May 20, 2026 20:07 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 2,978 $20.35 $60,596.64
Disclosure

SEC source: 0001628280-26-036885 · wk-form4_1779307664.xml · nonDerivative · entry 3

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 362,152

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $20.25 to $20.63, 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 at which the transactions were effected.

Read SEC document
May 18, 2026 Filed May 20, 2026 20:07 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 12,022 $19.96 $239,981.96
Disclosure

SEC source: 0001628280-26-036885 · wk-form4_1779307664.xml · nonDerivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 365,130

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $19.52 to $20.22, 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 at which the transactions were effected.

Read SEC document
May 18, 2026 Filed May 20, 2026 20:07 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 15,000 $3.79 $56,847.00
Disclosure

SEC source: 0001628280-26-036885 · wk-form4_1779307664.xml · nonDerivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 377,152

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
April 20, 2026 Filed Apr 20, 2026 23:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 15,000 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-026089 · wk-form4_1776727626.xml · derivative · entry 9

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 161,107

Underlying: Common Stock · 15,000 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F6 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
April 20, 2026 Filed Apr 20, 2026 23:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 15,000 $23.61 $354,145.50
Disclosure

SEC source: 0001628280-26-026089 · wk-form4_1776727626.xml · nonDerivative · entry 5

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 362,152

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $23.355 to $23.81, 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 at which the transactions were effected.

Read SEC document
April 20, 2026 Filed Apr 20, 2026 23:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 15,000 $3.79 $56,847.00
Disclosure

SEC source: 0001628280-26-026089 · wk-form4_1776727626.xml · nonDerivative · entry 4

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 377,152

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
April 16, 2026 Filed Apr 20, 2026 23:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 7,080 $0.00 Strike: $5.45 $0.00
Disclosure

SEC source: 0001628280-26-026089 · wk-form4_1776727626.xml · derivative · entry 8

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 558,432

Underlying: Common Stock · 7,080 shares

Expires 2033-12-14

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following December 14, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
April 16, 2026 Filed Apr 20, 2026 23:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 7,454 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-026089 · wk-form4_1776727626.xml · derivative · entry 7

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 130,546

Underlying: Common Stock · 7,454 shares

Expires 2033-04-05

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following April 5, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
April 16, 2026 Filed Apr 20, 2026 23:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 8,226 $0.00 Strike: $4.44 $0.00
Disclosure

SEC source: 0001628280-26-026089 · wk-form4_1776727626.xml · derivative · entry 6

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 56,684

Underlying: Common Stock · 8,226 shares

Expires 2032-10-04

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following October 4, 2022, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
April 16, 2026 Filed Apr 20, 2026 23:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 7,080 $5.45 $38,612.20
Disclosure

SEC source: 0001628280-26-026089 · wk-form4_1776727626.xml · nonDerivative · entry 3

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 362,152

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
April 16, 2026 Filed Apr 20, 2026 23:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 7,454 $3.79 $28,249.17
Disclosure

SEC source: 0001628280-26-026089 · wk-form4_1776727626.xml · nonDerivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 355,072

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
April 16, 2026 Filed Apr 20, 2026 23:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 8,226 $4.44 $36,497.94
Disclosure

SEC source: 0001628280-26-026089 · wk-form4_1776727626.xml · nonDerivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 347,618

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
March 20, 2026 Filed Mar 20, 2026 21:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 1,596 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-020236 · wk-form4_1774040575.xml · derivative · entry 9

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 176,107

Underlying: Common Stock · 1,596 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F5 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
March 20, 2026 Filed Mar 20, 2026 21:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 1,596 $18.95 $30,246.27
Disclosure

SEC source: 0001628280-26-020236 · wk-form4_1774040575.xml · nonDerivative · entry 6

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 339,392

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.73 to $19.26, 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 at which the transactions were effected.

Read SEC document
March 20, 2026 Filed Mar 20, 2026 21:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 1,596 $3.79 $6,048.52
Disclosure

SEC source: 0001628280-26-020236 · wk-form4_1774040575.xml · nonDerivative · entry 5

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 340,988

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
March 19, 2026 Filed Mar 20, 2026 21:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 6,905 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-020236 · wk-form4_1774040575.xml · derivative · entry 8

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 177,703

Underlying: Common Stock · 6,905 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F5 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
March 19, 2026 Filed Mar 20, 2026 21:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 6,905 $18.78 $129,704.90
Disclosure

SEC source: 0001628280-26-020236 · wk-form4_1774040575.xml · nonDerivative · entry 4

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 339,392

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.73 to $18.92, 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 at which the transactions were effected.

Read SEC document
March 19, 2026 Filed Mar 20, 2026 21:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 6,905 $3.79 $26,168.57
Disclosure

SEC source: 0001628280-26-020236 · wk-form4_1774040575.xml · nonDerivative · entry 3

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 346,297

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
March 18, 2026 Filed Mar 20, 2026 21:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 6,499 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-020236 · wk-form4_1774040575.xml · derivative · entry 7

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 184,608

Underlying: Common Stock · 6,499 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F5 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
March 18, 2026 Filed Mar 20, 2026 21:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 6,499 $18.84 $122,414.51
Disclosure

SEC source: 0001628280-26-020236 · wk-form4_1774040575.xml · nonDerivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 339,392

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.73 to $19.19, 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 at which the transactions were effected.

Read SEC document
March 18, 2026 Filed Mar 20, 2026 21:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 6,499 $3.79 $24,629.91
Disclosure

SEC source: 0001628280-26-020236 · wk-form4_1774040575.xml · nonDerivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 345,891

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
March 09, 2026 Filed Mar 11, 2026 20:47 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 36,766 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-016874 · wk-form4_1773262035.xml · derivative · entry 3

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 191,107

Underlying: Common Stock · 36,766 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F3 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
March 09, 2026 Filed Mar 11, 2026 20:47 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 36,766 $19.17 $704,657.16
Disclosure

SEC source: 0001628280-26-016874 · wk-form4_1773262035.xml · nonDerivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 339,392

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.73 to $19.64, 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 at which the transactions were effected.

Read SEC document
March 09, 2026 Filed Mar 11, 2026 20:47 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 36,766 $3.79 $139,335.79
Disclosure

SEC source: 0001628280-26-016874 · wk-form4_1773262035.xml · nonDerivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 376,158

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
March 06, 2026 Filed Mar 7, 2026 00:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 3,817 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-015778 · wk-form4_1772843254.xml · derivative · entry 9

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 227,873

Underlying: Common Stock · 3,817 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F5 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
March 06, 2026 Filed Mar 7, 2026 00:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 3,817 $18.75 $71,571.80
Disclosure

SEC source: 0001628280-26-015778 · wk-form4_1772843254.xml · nonDerivative · entry 6

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 339,392

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F4 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.73 to $18.92, 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 at which the transactions were effected.

Read SEC document
March 06, 2026 Filed Mar 7, 2026 00:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 3,817 $3.79 $14,465.67
Disclosure

SEC source: 0001628280-26-015778 · wk-form4_1772843254.xml · nonDerivative · entry 5

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 343,209

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
March 05, 2026 Filed Mar 7, 2026 00:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 1,786 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-015778 · wk-form4_1772843254.xml · derivative · entry 8

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 231,690

Underlying: Common Stock · 1,786 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F5 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
March 05, 2026 Filed Mar 7, 2026 00:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 1,786 $18.74 $33,464.10
Disclosure

SEC source: 0001628280-26-015778 · wk-form4_1772843254.xml · nonDerivative · entry 4

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 339,392

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.73 to $18.795, 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 at which the transactions were effected.

Read SEC document
March 05, 2026 Filed Mar 7, 2026 00:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 1,786 $3.79 $6,768.58
Disclosure

SEC source: 0001628280-26-015778 · wk-form4_1772843254.xml · nonDerivative · entry 3

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 341,178

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
March 04, 2026 Filed Mar 7, 2026 00:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 2,631 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0001628280-26-015778 · wk-form4_1772843254.xml · derivative · entry 7

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 233,476

Underlying: Common Stock · 2,631 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F5 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
March 04, 2026 Filed Mar 7, 2026 00:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 2,631 $18.73 $49,288.63
Disclosure

SEC source: 0001628280-26-015778 · wk-form4_1772843254.xml · nonDerivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 339,392

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.73 to $18.77, 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 at which the transactions were effected.

Read SEC document
March 04, 2026 Filed Mar 7, 2026 00:27 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 2,631 $3.79 $9,970.96
Disclosure

SEC source: 0001628280-26-015778 · wk-form4_1772843254.xml · nonDerivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 342,023

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
February 02, 2026 Filed Feb 4, 2026 21:37 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 GrantStock Option (Right to Buy) · Derivative 450,000 $0.00 Strike: $16.76 $0.00
Disclosure

SEC source: 0001628280-26-005484 · wk-form4_1770241022.xml · derivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 450,000

Underlying: Common Stock · 450,000 shares

Expires 2036-02-02

F1 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following February 2, 2026, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
December 16, 2025 Filed Dec 18, 2025 23:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 29,500 $0.00 Strike: $5.45 $0.00
Disclosure

SEC source: 0002034671-25-000012 · wk-form4_1766098974.xml · derivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 565,512

Underlying: Common Stock · 29,500 shares

Expires 2033-12-14

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following December 14, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
December 16, 2025 Filed Dec 18, 2025 23:02 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 29,500 $5.45 $160,884.15
Disclosure

SEC source: 0002034671-25-000012 · wk-form4_1766098974.xml · nonDerivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 339,392

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

Read SEC document
November 24, 2025 Filed Nov 25, 2025 23:40 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 41,163 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0002034671-25-000009 · wk-form4_1764114037.xml · derivative · entry 3

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 236,107

Underlying: Common Stock · 41,163 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F3 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
November 24, 2025 Filed Nov 25, 2025 23:40 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 41,163 $18.86 $776,428.85
Disclosure

SEC source: 0002034671-25-000009 · wk-form4_1764114037.xml · nonDerivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 309,892

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.73 to $18.98, 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 at which the transactions were effected.

Read SEC document
November 24, 2025 Filed Nov 25, 2025 23:40 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionCommon Stock 41,163 $3.79 $155,999.54
Disclosure

SEC source: 0002034671-25-000009 · wk-form4_1764114037.xml · nonDerivative · entry 1

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 351,055

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

Read SEC document
October 16, 2025 Filed Oct 20, 2025 20:11 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 Exercise / conversionStock Option (Right to Buy) · Derivative 24,103 $0.00 Strike: $3.79 $0.00
Disclosure

SEC source: 0002034671-25-000006 · wk-form4_1760991057.xml · derivative · entry 3

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 277,270

Underlying: Common Stock · 24,103 shares

Expires 2033-08-08

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F3 · derivative.exercise_date: The shares underlying this option vest in sixteen equal quarterly installments following August 8, 2023, subject to the Reporting Person's continued service on each such vesting date.

Read SEC document
October 16, 2025 Filed Oct 20, 2025 20:11 UTC Bicara Therapeutics Inc. BCAX · Entity 4673 SaleCommon Stock 24,103 $18.83 $453,760.67
Disclosure

SEC source: 0002034671-25-000006 · wk-form4_1760991057.xml · nonDerivative · entry 2

Mazumdar Claire · CIK 0002034671 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 309,892

F1 · kind: This transaction was executed pursuant to a Rule 10b5-1 trading plan adopted on February 12, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $18.73 to $19.17, 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 at which the transactions were effected.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.