META

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 16

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Advocacy

Disclosed balance after: 112,155

F19 · kind: The sales reported were effected by Chan Zuckerberg Advocacy pursuant to its Rule 10b5-1 trading plan.

F23 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.38 to $189.60 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F21 · ownership.nature: Shares held of record by Chan Zuckerberg Advocacy. The reporting person is deemed to have voting and investment power over the shares held by Chan Zuckerberg Advocacy, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 15

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Advocacy

Disclosed balance after: 112,655

F19 · kind: The sales reported were effected by Chan Zuckerberg Advocacy pursuant to its Rule 10b5-1 trading plan.

F22 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.34 to $189.33 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F21 · ownership.nature: Shares held of record by Chan Zuckerberg Advocacy. The reporting person is deemed to have voting and investment power over the shares held by Chan Zuckerberg Advocacy, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 14

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Advocacy

Disclosed balance after: 117,655

F19 · kind: The sales reported were effected by Chan Zuckerberg Advocacy pursuant to its Rule 10b5-1 trading plan.

F20 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.24 to $188.10 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F21 · ownership.nature: Shares held of record by Chan Zuckerberg Advocacy. The reporting person is deemed to have voting and investment power over the shares held by Chan Zuckerberg Advocacy, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 13

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 3 Dated 5/8/2014

Disclosed balance after: 156,059

F10 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F18 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.34 to $189.55 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F16 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 12

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 3 Dated 5/8/2014

Disclosed balance after: 156,209

F10 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F17 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.34 to $189.32 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F16 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 11

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 3 Dated 5/8/2014

Disclosed balance after: 157,709

F10 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F15 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.30 to $188.12 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F16 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 10

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 2 Dated 5/8/2014

Disclosed balance after: 121,109

F10 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F14 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.27 to $189.615 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F12 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 9

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 2 Dated 5/8/2014

Disclosed balance after: 121,379

F10 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F13 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.27 to $189.25 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F12 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 8

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 2 Dated 5/8/2014

Disclosed balance after: 122,479

F10 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F11 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.20 to $188.13 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F12 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 7

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 0

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F9 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.97 to $189.63 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F6 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 6

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 7,900

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F8 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.97 to $188.96 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F6 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 5

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 15,260

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F7 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.97 to $187.96 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F6 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 4

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 19,000

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.

F6 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 3

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Foundation

Disclosed balance after: 5,600,407

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F5 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.97 to $189.68 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by CZ Foundation. The reporting person is deemed to have voting and investment power over the shares held by CZ Foundation, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 2

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Foundation

Disclosed balance after: 5,639,406

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.97 to $188.96 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by CZ Foundation. The reporting person is deemed to have voting and investment power over the shares held by CZ Foundation, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030663 · form4.xml · nonDerivative · entry 1

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Foundation

Disclosed balance after: 5,678,291

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.97 to $187.96 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by CZ Foundation. The reporting person is deemed to have voting and investment power over the shares held by CZ Foundation, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030659 · form4.xml · derivative · entry 5

FISCHER DAVID B. · CIK 0001549078 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 14,988 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.

F4 · security: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

F4 · derivative.exercise_price: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

F6 · shares: The holder elected to convert the shares of Class B Common Stock into Class A Common Stock on a 1-for-1 basis.

F4 · derivative.exercise_date: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

F4 · derivative.expiration_date: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

SEC source: 0001127602-19-030659 · form4.xml · derivative · entry 4

FISCHER DAVID B. · CIK 0001549078 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,988

Underlying: Class A Common Stock · 14,988 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.

F4 · security: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

F4 · derivative.exercise_price: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

F4 · derivative.exercise_date: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

F4 · derivative.expiration_date: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

SEC source: 0001127602-19-030659 · form4.xml · derivative · entry 3

FISCHER DAVID B. · CIK 0001549078 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class B Common Stock · 14,988 shares

Expires 2021-03-24

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_price: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

F5 · derivative.exercise_date: The RSUs vest as to 1/16th of the total shares quarterly, beginning on January 15, 2016, subject to continued service through each vesting date.

F4 · derivative.underlying: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

SEC source: 0001127602-19-030659 · form4.xml · nonDerivative · entry 2

FISCHER DAVID B. · CIK 0001549078 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,526

F3 · shares: Represents the number of shares of Class A Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of the RSUs and does not represent a sale by the reporting person.

SEC source: 0001127602-19-030659 · form4.xml · nonDerivative · entry 1

FISCHER DAVID B. · CIK 0001549078 · Chief Revenue Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,958

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 · shares: Represents the number of shares that were acquired upon conversion of Class B Common Stock to Class A Common Stock in connection with the settlement of the Restricted Stock Units ("RSUs") listed in Table II.

F2 · balance_after: Since the date of the reporting person's last ownership report, he transferred 659 shares of the Issuer's Class A common stock pursuant to a domestic relations order. The reporting person no longer reports as beneficially owned any securities owned by his former spouse.

SEC source: 0001127602-19-030662 · form4.xml · nonDerivative · entry 6

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Advocacy

Disclosed balance after: 119,655

F1 · kind: The sales reported were effected by Chan Zuckerberg Advocacy pursuant to its Rule 10b5-1 trading plan.

F8 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.925 to $189.97 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by Chan Zuckerberg Advocacy. The reporting person is deemed to have voting and investment power over the shares held by Chan Zuckerberg Advocacy, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030662 · form4.xml · nonDerivative · entry 5

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Advocacy

Disclosed balance after: 120,331

F1 · kind: The sales reported were effected by Chan Zuckerberg Advocacy pursuant to its Rule 10b5-1 trading plan.

F7 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.90 to $189.835 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by Chan Zuckerberg Advocacy. The reporting person is deemed to have voting and investment power over the shares held by Chan Zuckerberg Advocacy, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030662 · form4.xml · nonDerivative · entry 4

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Advocacy

Disclosed balance after: 124,383

F1 · kind: The sales reported were effected by Chan Zuckerberg Advocacy pursuant to its Rule 10b5-1 trading plan.

F6 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.71 to $188.70 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by Chan Zuckerberg Advocacy. The reporting person is deemed to have voting and investment power over the shares held by Chan Zuckerberg Advocacy, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030662 · form4.xml · nonDerivative · entry 3

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Advocacy

Disclosed balance after: 125,241

F1 · kind: The sales reported were effected by Chan Zuckerberg Advocacy pursuant to its Rule 10b5-1 trading plan.

F5 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.405 to $187.14 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by Chan Zuckerberg Advocacy. The reporting person is deemed to have voting and investment power over the shares held by Chan Zuckerberg Advocacy, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030662 · form4.xml · nonDerivative · entry 2

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Advocacy

Disclosed balance after: 125,941

F1 · kind: The sales reported were effected by Chan Zuckerberg Advocacy pursuant to its Rule 10b5-1 trading plan.

F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.00 to $185.675 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by Chan Zuckerberg Advocacy. The reporting person is deemed to have voting and investment power over the shares held by Chan Zuckerberg Advocacy, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030662 · form4.xml · nonDerivative · entry 1

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Advocacy

Disclosed balance after: 126,888

F1 · kind: The sales reported were effected by Chan Zuckerberg Advocacy pursuant to its Rule 10b5-1 trading plan.

F2 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.80 to $184.355 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by Chan Zuckerberg Advocacy. The reporting person is deemed to have voting and investment power over the shares held by Chan Zuckerberg Advocacy, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030661 · form4.xml · derivative · entry 26

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 356,734,531

Underlying: Class A Common Stock · 19,000 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.

F29 · security: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares and has no expiration date.

F29 · derivative.exercise_price: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares and has no expiration date.

F29 · derivative.exercise_date: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares and has no expiration date.

F29 · derivative.expiration_date: The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares and has no expiration date.

F10 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 25

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 3 Dated 5/8/2014

Disclosed balance after: 158,309

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F28 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.19 to $190.16 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F24 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 24

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 3 Dated 5/8/2014

Disclosed balance after: 159,289

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F27 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.10 to $189.055 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F24 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 23

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 3 Dated 5/8/2014

Disclosed balance after: 160,014

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F26 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.39 to $187.105 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F24 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 22

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 3 Dated 5/8/2014

Disclosed balance after: 160,272

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F25 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.00 to $185.39 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F24 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 21

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 3 Dated 5/8/2014

Disclosed balance after: 160,539

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F24 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 20

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 2 Dated 5/8/2014

Disclosed balance after: 122,959

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F23 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.985 to $190.16 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F18 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 19

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 2 Dated 5/8/2014

Disclosed balance after: 123,190

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F22 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.96 to $189.64 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F18 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 18

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 2 Dated 5/8/2014

Disclosed balance after: 123,917

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F21 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.955 to $188.90 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F18 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 17

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 2 Dated 5/8/2014

Disclosed balance after: 124,373

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F20 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.64 to $186.865 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F18 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 16

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 2 Dated 5/8/2014

Disclosed balance after: 124,539

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F19 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.00 to $185.425 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F18 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 15

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Mark Zuckerberg, Trustee Of The Mark Zuckerberg 2014 GRAT No. 2 Dated 5/8/2014

Disclosed balance after: 124,793

F17 · kind: The sales reported were effected by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014 and Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 3, dated 5/8/2014, as applicable, pursuant to their Rule 10b5-1 trading plans.

F18 · ownership.nature: Shares held of record by Mark Zuckerberg, Trustee of The Mark Zuckerberg 2014 GRAT No. 2, dated 5/8/2014.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 14

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 0

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F16 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.895 to $190.275 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F10 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 13

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 1,171

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F15 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.85 to $189.835 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F10 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 12

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 12,462

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F14 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.73 to $188.70 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F10 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 11

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 15,028

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F13 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.23 to $187.12 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F10 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 10

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 16,940

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F12 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $185.045 to $186.03 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F10 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 9

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 18,378

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F11 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $183.78 to $184.33 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F10 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 8

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By CZI Holdings, LLC

Disclosed balance after: 19,000

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.

F10 · ownership.nature: Shares held of record by CZI. Mark Zuckerberg, Trustee of The Mark Zuckerberg Trust dated July 7, 2006 ("2006 Trust") is the sole member of CZI. Mr. Zuckerberg is the sole trustee of the 2006 Trust and, therefore, is deemed to have sole voting and investment power over the securities held by CZI.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 7

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Foundation

Disclosed balance after: 5,695,407

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F9 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $189.89 to $190.29 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by CZ Foundation. The reporting person is deemed to have voting and investment power over the shares held by CZ Foundation, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 6

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Foundation

Disclosed balance after: 5,701,546

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F8 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $188.89 to $189.875 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by CZ Foundation. The reporting person is deemed to have voting and investment power over the shares held by CZ Foundation, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 5

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Foundation

Disclosed balance after: 5,755,708

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F7 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $187.89 to $188.88 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by CZ Foundation. The reporting person is deemed to have voting and investment power over the shares held by CZ Foundation, but has no pecuniary interest in these shares.

SEC source: 0001127602-19-030661 · form4.xml · nonDerivative · entry 4

Zuckerberg Mark · CIK 0001548760 · Director · COB and CEO · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Chan Zuckerberg Foundation

Disclosed balance after: 5,768,123

F1 · kind: The sales reported were effected by Mark Zuckerberg, Trustee and Settlor of the Chan Zuckerberg Foundation ("CZ Foundation") and CZI Holdings, LLC ("CZI"), as applicable, pursuant to their Rule 10b5-1 trading plans.

F6 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $186.885 to $187.87 per share, inclusive. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

F3 · ownership.nature: Shares held of record by CZ Foundation. The reporting person is deemed to have voting and investment power over the shares held by CZ Foundation, but has no pecuniary interest in these shares.