TapewireFind a company

person · Reporting owner

Prokupets Elena

Disclosed activity across 1 company

Tapewire entity
135152
SEC CIK
0001824823

Export transaction history ↓

Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
C4 Therapeutics, Inc.CCCC · Entity 5503DirectorSeptember 27, 2021September 29, 2021

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.

C4 Therapeutics, Inc.

Report date September 27, 2021 · Filed September 29, 2021

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeIndirectBy Spouse31,681 Reported balance After 2021-09-27 transaction · row 1 Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source row

Row 1 · 2021-09-27 · Sale · Disposed 539 · Balance 31,681

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F2: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.09. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Common StockSEC Table I · non-derivativeIndirectBy ERP Business Holdings, LP503,126 Reported balance After 2021-09-27 transaction · row 2 Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source row

Row 2 · 2021-09-27 · Sale · Disposed 1,311 · Balance 503,126

F3: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F4: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.19. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Filing footnotes · ownership attribution and instrument terms

F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F2: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.09. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F3: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F4: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.19. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Transaction history

JSON API
Reset

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
September 27, 2021 Filed Sep 29, 2021 22:33 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 1,311 $50.04 $65,604.01
Disclosure

SEC source: 0001209191-21-058111 · doc4.xml · nonDerivative · entry 2

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 503,126

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F4 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.19. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 27, 2021 Filed Sep 29, 2021 22:33 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 539 $50.04 $26,969.03
Disclosure

SEC source: 0001209191-21-058111 · doc4.xml · nonDerivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 31,681

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.09. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 24, 2021 Filed Sep 24, 2021 20:51 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 2,115 $50.10 $105,963.62
Disclosure

SEC source: 0001209191-21-057633 · doc4.xml · nonDerivative · entry 8

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 504,437

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F4 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.34. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 24, 2021 Filed Sep 24, 2021 20:51 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 900 $50.11 $45,101.25
Disclosure

SEC source: 0001209191-21-057633 · doc4.xml · nonDerivative · entry 7

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 32,220

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F9 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.28. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 23, 2021 Filed Sep 24, 2021 20:51 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 1,007 $51.08 $51,434.74
Disclosure

SEC source: 0001209191-21-057633 · doc4.xml · nonDerivative · entry 6

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 506,552

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F8 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $51.00 to $51.16. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 23, 2021 Filed Sep 24, 2021 20:51 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 11,801 $50.35 $594,193.33
Disclosure

SEC source: 0001209191-21-057633 · doc4.xml · nonDerivative · entry 5

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 507,559

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F6 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.99. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 23, 2021 Filed Sep 24, 2021 20:51 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 446 $51.09 $22,784.40
Disclosure

SEC source: 0001209191-21-057633 · doc4.xml · nonDerivative · entry 4

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 33,120

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F7 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $51.04 to $51.16. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 23, 2021 Filed Sep 24, 2021 20:51 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 5,926 $50.35 $298,359.29
Disclosure

SEC source: 0001209191-21-057633 · doc4.xml · nonDerivative · entry 3

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 33,566

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F6 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.99. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 22, 2021 Filed Sep 24, 2021 20:51 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 7,004 $50.09 $350,860.48
Disclosure

SEC source: 0001209191-21-057633 · doc4.xml · nonDerivative · entry 2

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 519,360

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F4 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.34. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F5 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 22, 2021 Filed Sep 24, 2021 20:51 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 3,544 $50.10 $177,554.40
Disclosure

SEC source: 0001209191-21-057633 · doc4.xml · nonDerivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 39,492

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.31. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 21, 2021 Filed Sep 21, 2021 23:26 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 5,333 $50.14 $267,409.95
Disclosure

SEC source: 0001209191-21-057118 · doc4.xml · nonDerivative · entry 4

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 526,364

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F5 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.42. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 21, 2021 Filed Sep 21, 2021 23:26 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 4,988 $50.13 $250,051.43
Disclosure

SEC source: 0001209191-21-057118 · doc4.xml · nonDerivative · entry 3

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 43,036

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F5 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.42. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 17, 2021 Filed Sep 21, 2021 23:26 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 5,688 $50.05 $284,686.68
Disclosure

SEC source: 0001209191-21-057118 · doc4.xml · nonDerivative · entry 2

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 531,697

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.18. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 17, 2021 Filed Sep 21, 2021 23:26 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 5,152 $50.04 $257,808.14
Disclosure

SEC source: 0001209191-21-057118 · doc4.xml · nonDerivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 48,024

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.18. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 16, 2021 Filed Sep 16, 2021 23:31 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 346 $50.01 $17,305.05
Disclosure

SEC source: 0001209191-21-056482 · doc4.xml · nonDerivative · entry 7

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 510,385

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F9 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.045. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 16, 2021 Filed Sep 16, 2021 23:31 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 25,807 $48.62 $1,254,676.98
Disclosure

SEC source: 0001209191-21-056482 · doc4.xml · nonDerivative · entry 6

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 510,731

F8 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.50 to $49.165. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 16, 2021 Filed Sep 16, 2021 23:31 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 346 $50.01 $17,302.94
Disclosure

SEC source: 0001209191-21-056482 · doc4.xml · nonDerivative · entry 5

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 53,176

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F7 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.05. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 15, 2021 Filed Sep 16, 2021 23:31 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 24,193 $48.97 $1,184,690.08
Disclosure

SEC source: 0001209191-21-056482 · doc4.xml · nonDerivative · entry 4

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 563,538

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F6 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.80 to $49.32. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 15, 2021 Filed Sep 16, 2021 23:31 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 30,000 $48.71 $1,461,204.00
Disclosure

SEC source: 0001209191-21-056482 · doc4.xml · nonDerivative · entry 3

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 53,522

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F5 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.25 to $49.00. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 14, 2021 Filed Sep 16, 2021 23:31 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 492 $50.03 $24,613.58
Disclosure

SEC source: 0001209191-21-056482 · doc4.xml · nonDerivative · entry 2

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 587,731

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.145. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 14, 2021 Filed Sep 16, 2021 23:31 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 492 $50.01 $24,603.39
Disclosure

SEC source: 0001209191-21-056482 · doc4.xml · nonDerivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 83,522

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.145. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 13, 2021 Filed Sep 14, 2021 20:10 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 3,330 $50.07 $166,743.42
Disclosure

SEC source: 0001209191-21-055886 · doc4.xml · nonDerivative · entry 4

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 588,223

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F5 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.54. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 13, 2021 Filed Sep 14, 2021 20:10 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 3,330 $50.07 $166,730.44
Disclosure

SEC source: 0001209191-21-055886 · doc4.xml · nonDerivative · entry 3

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 84,014

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F5 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.54. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
September 10, 2021 Filed Sep 14, 2021 20:10 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 1,320 $50.01 $66,009.90
Disclosure

SEC source: 0001209191-21-055886 · doc4.xml · nonDerivative · entry 2

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 591,553

F3 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.03. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

F4 · ownership.nature: Shares held by ERP Business Holdings, L.P. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
September 10, 2021 Filed Sep 14, 2021 20:10 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 1,230 $50.00 $61,500.98
Disclosure

SEC source: 0001209191-21-055886 · doc4.xml · nonDerivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 87,344

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $50.00 to $50.03. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
August 03, 2021 Filed Aug 5, 2021 23:35 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 14,407 $45.16 $650,586.98
Disclosure

SEC source: 0001209191-21-050057 · doc4.xml · nonDerivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 88,574

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.38. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
August 02, 2021 Filed Aug 2, 2021 22:47 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 4,257 $45.01 $191,606.29
Disclosure

SEC source: 0001209191-21-049118 · doc4.xml · nonDerivative · entry 2

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 102,981

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.15. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
July 29, 2021 Filed Aug 2, 2021 22:47 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 SaleCommon Stock 11,336 $45.00 $510,167.61
Disclosure

SEC source: 0001209191-21-049118 · doc4.xml · nonDerivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 107,238

F1 · kind: This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 12, 2021.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.07. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

Read SEC document
June 15, 2021 Filed Jun 17, 2021 20:16 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 GrantStock Option (Right to Buy) · Derivative 23,500 $0.00 Strike: $37.66 $0.00
Disclosure

SEC source: 0001209191-21-041426 · doc4.xml · derivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 23,500

Underlying: Common Stock · 23,500 shares

Expires 2031-06-14

F1 · derivative.exercise_date: This option shall vest and become exercisable in full upon the earlier to occur of (i) June 15, 2022 and (ii) the next annual meeting of the Issuer's stockholders.

Read SEC document
October 06, 2020 Filed Oct 7, 2020 01:23 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 ConversionSeries A Preferred Stock · Derivative 5,000,000 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-027688 · doc4.xml · derivative · entry 4

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 0

Underlying: Common Stock · 592,873 shares

Expires not disclosed

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_price: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date.

F1 · derivative.exercise_date: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date.

F1 · derivative.expiration_date: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date.

F2 · ownership.nature: Shares held by ERP Business Holdings, LP. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
October 06, 2020 Filed Oct 7, 2020 01:23 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 ConversionSeries A Preferred Stock · Derivative 1,000,000 $0.00 $0.00
Disclosure

SEC source: 0000899243-20-027688 · doc4.xml · derivative · entry 3

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 0

Underlying: Common Stock · 118,574 shares

Expires not disclosed

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_price: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date.

F1 · derivative.exercise_date: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date.

F1 · derivative.expiration_date: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date.

Read SEC document
October 06, 2020 Filed Oct 7, 2020 01:23 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 ConversionCommon Stock 592,873 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-027688 · doc4.xml · nonDerivative · entry 2

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By ERP Business Holdings, LP

Disclosed balance after: 592,873

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 · price: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date.

F2 · ownership.nature: Shares held by ERP Business Holdings, LP. The Reporting Person disclaims beneficial ownership of these shares except to the extent of her pecuniary interest therein.

Read SEC document
October 06, 2020 Filed Oct 7, 2020 01:23 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 ConversionCommon Stock 118,574 Not disclosed Not disclosed
Disclosure

SEC source: 0000899243-20-027688 · doc4.xml · nonDerivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Spouse

Disclosed balance after: 118,574

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 · price: Each share of Series A Preferred Stock automatically converted into the Issuer's Common Stock on a 8.4335-to-one basis upon the closing of the Issuer's initial public offering on October 6, 2020 and had no expiration date.

Read SEC document
October 01, 2020 Filed Oct 6, 2020 01:00 UTC C4 Therapeutics, Inc. CCCC · Entity 5503 GrantStock Option (Right to Buy) · Derivative 17,786 $0.00 Strike: $19.00 $0.00
Disclosure

SEC source: 0000899243-20-027446 · doc4.xml · derivative · entry 1

Prokupets Elena · CIK 0001824823 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,786

Underlying: Common Stock · 17,786 shares

Expires 2030-09-30

F1 · derivative.exercise_date: This option shall vest and become exercisable upon the earlier to occur of (i) October 1, 2021, and (ii) the next annual meeting of the Issuer's stockholders.

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.