374Water SCWO Insider Ownership

Updated Oct 11, 2026

Across the past 12 months, open-market trades by 374Water insiders totaled $108,395 in purchases and $1.02 million in sales.

• By number of insiders, 374Water saw 2 insiders buy and one insider sell on the open market over the past 12 months.
• Among 374Water's insiders, the largest open-market purchases in the past 12 months were by Stephen J. Jones (Interim CEO), totaling $103,995, most recently on December 16, 2025.
• On the sell side, Yaacov Nagar (10% owner) led open-market sales of 374Water stock over the past 12 months with $1.02 million, most recently on October 23, 2025.
• According to Business Quant data, insiders at 374Water reported 5.22Mn shares in total in their latest Form 4 filings, or 29.47% of the 17.72Mn shares outstanding; that total is unchanged from 5.22Mn shares at the end of Q2 2026 and down 24.45% from 6.91Mn shares (split-adjusted) at the end of Q3 2025.
• Indirect holdings, through trusts, partnerships, family members and other entities, make up 14.62% (763.11K shares) of 374Water's insider total, with the other 85.38% (4.46Mn shares) held directly.
• The insider holdings in 374Water belong to 14 insiders who have reported on Form 4 within the past two years.
• SCWO's three largest insider shareholders, per their latest Form 4 filings, are Marc Deshusses (Director and 10% owner, 2.27Mn shares), Yaacov Nagar (10% owner, 1.77Mn shares) and Terry Merrell (Director, 609.06K shares).
• Marc Deshusses alone accounts for 43.39% of the shares held by 374Water insiders.
• Over the past 12 months, 6 insiders reported transactions in 374Water stock in 11 Form 4 filings.
• The insider data for SCWO reflects Form 4 filings through July 8, 2026.