The companies which have signed the registration form for the TC39 Royalty Free Technical Committe (TC) are the following:
- Adobe*
- Agoric Systems
- Alibaba
- Apple
- Beijing Bytedance Network Technology Co., Ltd.
- Bloomberg
- Bocoup*
- Coinbase, Inc.
- Datlas, Inc.
- Deno Land Inc.
- Dojo Foundation*
- GoDaddy.com
- Huawei
- IBM
- Igalia, S.L.
- Imperial College London
- Indiana University
- Inria
- Intel
- JS Foundation
- Leiden University
- Meta (formerly Facebook)
- MetaMask*
- Meteor Development Group*
- Microsoft
- Moddable Tech, Inc.
- Mozilla Foundation
- npm, Inc.
- Oracle America, Inc.
- PayPal (ex eBay)
- Rome Tools, Inc.
- RunKit, Inc.
- SATT AI Lab
- ServiceNow Inc. (membership to be approved at the December 2022 GA)
- Sony
- Stripe, Inc.*
- Sujitech
- Tilde Inc.
- Tencent
- Turing School of Software & Design
- Twitter*
- University of Bergen
- Vrije Universiteit Brussel*
- Yahoo!*
- Zalari GmbH
* Not anymore Ecma member