Grayscale's fourth Zcash amendment puts a privacy coin in front of the SEC

Grayscale filed a fourth amendment to the Form S-3 for its Zcash Trust on August 18, setting up a spot exchange-traded product that would trade on NYSE Arca under the ticker ZCSH ^[1]. If it clears, it would be the first US ETF tracking a privacy coin, which matters less as a product launch than as a test of what the SEC will let onto a national exchange ^[2].

The mechanical changes are the interesting part. The amendment restates creation and redemption so that both run mainly through cash orders, with authorized participants still able to create shares in-kind by delivering ZEC, while in-kind redemptions are not permitted as of the filing date ^[3]. That asymmetry is a one-way door: coins can go in, but they come out only as dollars, which means the trust itself has to sell ZEC into the market to meet outflows. For an asset whose distinguishing feature is shielded transfers, a cash-out-only design is the compromise that makes the plumbing acceptable to intermediaries.

The rest of the structure is conventional. It is a Delaware statutory trust sponsored by Grayscale Investments Sponsors, LLC ^[4], with Coinbase as prime broker, Coinbase Custody Trust Company holding the ZEC, and Bank of New York Mellon as transfer agent and administrator ^[5]. Grayscale says it will rename the trust once registration takes effect and shares begin trading ^[6].

Seeding is where the related-party question sits. The filing discloses non-binding talks under which DCG International Investments Ltd, an indirect subsidiary of Grayscale's parent Digital Currency Group, could buy shares through an authorized participant by delivering 200,000 ZEC ^[7]. ZEC rose more than 9% in the 24 hours after the filing was disclosed, to around $555 on CoinMarketCap data ^[8], which values that contribution at roughly $111 million ^[1]. In other words, the anchor investor would be the sponsor's own corporate family, paying in coin rather than cash.

Demand for the existing vehicle was already building: ZCSH averaged roughly $1.7 million in daily volume in April, more than double March's level ^[9], implying a March figure below about $850,000 ^[5]. On-chain, the share of ZEC in shielded balances reached nearly 30% of circulating supply, a record ^[10], and the Orchard pool grew from 1.92 million to 4.55 million ZEC over twelve months, according to data from The Block ^[11] - a gain of about 137% ^[2].

That same pool is the reason to read the risk language carefully. Security researcher Taylor Hornby disclosed a flaw in the Orchard shielded pool that could have allowed an attacker to mint counterfeit ZEC ^[12]; the token fell from $602 to near $299 when the news broke in June ^[13], a drawdown of about 50% ^[3]. Developers patched it within days, said they found no sign of exploitation, and followed with the Ironwood upgrade to detect counterfeit coins ^[14]. At $555, ZEC is still roughly 8% below where it traded before the disclosure ^[4].

Two things to watch. First, whether the SEC lets the in-kind creation window stand for an asset built on zero-knowledge shielding ^[15][3], given that regulated products have historically avoided privacy tokens ^[16]. Second, whether the DCG seed converts from non-binding talk into a delivered 200,000 ZEC, and what the first month of cash-only redemptions does to ZEC liquidity ^[7][3].