https://www.facebook.com/security.txt has the following security.txt contents:
Contact: https://www.facebook.com/whitehat/report/
Acknowledgments: https://www.facebook.com/whitehat/thanks/
Policy: https://www.facebook.com/whitehat/info/
Hiring: https://www.facebook.com/careers/teams/security/
==========
https://www.bbc.co.uk/security.txt has the following security.txt contents:
# British Broadcasting Corporation - reporting security vulnerabilities to the BBC

# Please report any security vulnerabilities to us via the contact method(s) below, only after reading our disclosure policy.
# Please do not include any sensitive information in your initial message, we'll provide a secure communication method in our reply to you.
Contact: mailto:security@bbc.co.uk

# Our disclosure policy. By submitting a potential security incident to us, you are implicitly accepting these terms - please read this before submitting:
Policy: https://www.bbc.com/backstage/security-disclosure-policy/

# We're continually recruiting, please visit the link below and search for "information security" if you're interested in a career with the BBC in infosec
Hiring: https://careerssearch.bbc.co.uk/jobs/search

# Please see https://securitytxt.org/ for details of the specification of this file
==========
https://www.bbc.com/security.txt has the following security.txt contents:
# British Broadcasting Corporation - reporting security vulnerabilities to the BBC

# Please report any security vulnerabilities to us via the contact method(s) below, only after reading our disclosure policy.
# Please do not include any sensitive information in your initial message, we'll provide a secure communication method in our reply to you.
Contact: mailto:security@bbc.co.uk

# Our disclosure policy. By submitting a potential security incident to us, you are implicitly accepting these terms - please read this before submitting:
Policy: https://www.bbc.com/backstage/security-disclosure-policy/

# We're continually recruiting, please visit the link below and search for "information security" if you're interested in a career with the BBC in infosec
Hiring: https://careerssearch.bbc.co.uk/jobs/search

# Please see https://securitytxt.org/ for details of the specification of this file
==========
https://www.outbrain.com/security.txt has the following security.txt contents:
Contact: security@outbrain.com
Disclosure: contact security@outbrain.com and ask to join the program

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https://www.patreon.com/security.txt has the following security.txt contents:
Contact: mailto:security@patreon.com
Encryption: https://www.patreon.com/security_pgp_key.asc
Signature: https://www.patreon.com/.well-known/security.txt.sig
Hiring: https://www.patreon.com/careers

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https://www.themeforest.net/security.txt has the following security.txt contents:
Contact: https://help.market.envato.com/hc/en-us/requests/new?ticket_form_id=38490
Policy: https://webuild.envato.com/helpful-hacker/
Acknowledgement: https://webuild.envato.com/helpful-hacker/
Encryption: https://webuild.envato.com/pgp.txt
Signature: https://webuild.envato.com/security.txt.sig

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https://www.grammarly.com/security.txt has the following security.txt contents:
Contact: security@grammarly.com
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https://www.bitly.com/security.txt has the following security.txt contents:
Contact: security@bitly.com
Encryption: https://bitly.com/security_pgp.txt
Disclosure: Partial

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https://www.svt.se/security.txt has the following security.txt contents:
Contact: https://kontakt.svt.se/guide/kontakt
==========