# CosTech: Form D filing

CosTech, an investing company in San Francisco, CA, filed a Form D with the SEC in 2015. The latest, on July 9, 2015, reports $100,000 sold of a $10 million offering to 1 investor.

Find out what CosTech does, who founded it and who invested, beyond what the filing says. $10 of credit on sign-up, no card.

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## The full lists

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- [Form D filings in California](https://specstream.ai/data/form-d/state/california): 5,891 rows, by operating companies, filed since November 1, 2024, $138.91, or the new rows each week for $19 a month. Buy: https://specstream.ai/data/form-d/state/california
- [Form D filings in Investing](https://specstream.ai/data/form-d/industry/investing): 1,820 rows, by operating companies, filed since November 1, 2024, $91, or the new rows each week for $19 a month. Buy: https://specstream.ai/data/form-d/industry/investing

SpecStream is the live web data engine for teams and agents. It reads every Form D on SEC EDGAR the day it is filed, and this page is that reading. Ask for your own cut (a state, an industry, a size) and new filings arrive in your sheet, CRM, Slack or agent as they land.

## Company details from the filing

- Address: 32 TARAVAL ST, San Francisco, CA, 94116
- Phone: (213) 943-6100
- Industry: Investing
- Entity type: Limited Liability Company
- Incorporated in: California
- Year incorporated: 2015
- Revenue range: $1 - $1,000,000
- Exemptions claimed: Rule 506(c)
- SEC identifier (CIK): 1646389

## Form D filings

| Filed | Type | Offering | Sold | Remaining | Investors | First sale | Filing |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Jul 9, 2015 | New notice | $10,000,000 | $100,000 | $9,900,000 | 1 | Jul 8, 2015 | [sec.gov](https://www.sec.gov/Archives/edgar/data/1646389/000164638915000004/0001646389-15-000004-index.htm) |

## Executive officers and directors named in the filing

| Name | Role | Note in the filing |
| --- | --- | --- |
| Margaret Stack King | Executive Officer |  |
| Rafael Stack Sweet | Executive Officer |  |
| Courtney Stack Ross-Tait | Executive Officer |  |
| Tal Stack Finney | Executive Officer |  |

## Other investing companies in California that filed recently

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- [SHAC CW DEV PARTNERS LLC](https://specstream.ai/data/form-d/company/shac-cw-dev-partners-llc-2157946) $23.9 million · Nov 6, 2026
- [ARKIE FAI LLC](https://specstream.ai/data/form-d/company/arkie-fai-llc-2162830) offering · Nov 3, 2026
- [CoCatalyst Capital Holdings LLC](https://specstream.ai/data/form-d/company/cocatalyst-capital-holdings-llc-2116485) $7.5 million · Oct 28, 2026
- [CXVN, LP](https://specstream.ai/data/form-d/company/cxvn-lp-2160913) offering · Oct 21, 2026

[Every Form D from the week of Jul 6, 2015](https://specstream.ai/data/form-d/week/2015-07-06) · [All recent filings in California](https://specstream.ai/data/form-d/state/california) · [All recent Investing filings](https://specstream.ai/data/form-d/industry/investing)

Read from SEC EDGAR. Amount sold is what CosTech reported on the day it filed; on an offering that is still open, a later amendment can raise it. Free to reuse with credit to SpecStream under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).