374Water, Inc. (SCWO) Ownership
SCWO ownership summary
as of October 18, 2026- Institutions
- 10.3% of shares outstanding
- Insiders
- 42.98% of shares outstanding
- Shares outstanding
- 17.7M
- Float
- 10.2M shares available to trade
- Short interest
- 1.59% 182K shares short
- Days to cover
- 3.19 short interest down 18.3% vs prior month
- Institutions 10.29%
- Insiders 42.98%
- Other investors 46.73%
SCWO top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard Capital Management, LLC | 1.82% | 323K | $784,375 | — | June 30, 2026 |
| 2 | CapTrust Financial Advisors | 1.17% | 207K | $502,373 | — | June 30, 2026 |
| 3 | Hamilton Lane Advisors LLC | 0.90% | 160K | $389,354 | — | June 30, 2026 |
| 4 | Davidson D A & Co | 0.84% | 148K | $360,075 | +12,697 (+9.4%) | June 30, 2026 |
| 5 | BlackRock Inc | 0.67% | 120K | $290,431 | +40,227 (+50.7%) | June 30, 2026 |
| 6 | Icon Wealth Advisors LLC | 0.61% | 108K | $263,317 | — | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 0.61% | 108K | $261,859 | −11,593 (−9.7%) | June 30, 2026 |
| 8 | Vanguard Fiduciary Trust Co | 0.40% | 70K | $170,353 | +21,646 (+44.7%) | June 30, 2026 |
| 9 | Sigma Planning Corp | 0.31% | 56K | $134,994 | +3,200 (+6.1%) | June 30, 2026 |
| 10 | Advisor Group Holdings, Inc. | 0.28% | 50K | $122,358 | −13,000 (−20.5%) | June 30, 2026 |
| 11 | Millennium Management LLC | 0.27% | 48K | $117,755 | −15,216 (−23.9%) | June 30, 2026 |
| 12 | Sentinel Trust CO Lba | 0.23% | 40K | $97,516 | — | June 30, 2026 |
| 13 | UBS Group AG | 0.21% | 38K | $92,544 | +4,240 (+12.5%) | June 30, 2026 |
| 14 | Northern Trust Corp | 0.15% | 26K | $62,990 | −2,263 (−8.0%) | June 30, 2026 |
| 15 | State Street Corp | 0.13% | 23K | $56,318 | — | June 30, 2026 |
| 16 | Trinity Legacy Partners LLC | 0.13% | 23K | $56,284 | — | June 30, 2026 |
| 17 | Susquehanna International Group, LLP | 0.13% | 23K | $55,783 | −14,072 (−38.0%) | June 30, 2026 |
| 18 | Mariner Wealth Advisors LLC | 0.11% | 19K | $46,352 | +1,000 (+5.5%) | June 30, 2026 |
| 19 | Uncommon Cents Investing LLC | 0.10% | 18K | $44,226 | — | June 30, 2026 |
| 20 | Prospera Financial Services Inc | 0.10% | 18K | $42,525 | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 6 holders added 83K shares and 5 cut 56K.
SCWO top mutual fund and ETF holders
9 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 1.21% | 214K | $520,372 | — | August 31, 2026 |
| 2 | Fidelity Extended Market Index | 0.30% | 53K | $129,293 | −286 (−0.5%) | August 31, 2026 |
| 3 | iShares Micro-Cap ETF | 0.20% | 36K | $87,536 | −248 (−0.7%) | September 30, 2026 |
| 4 | Fidelity Series Total Market Index | 0.08% | 15K | $35,383 | — | August 31, 2026 |
| 5 | Fidelity Total Market Index | 0.08% | 14K | $34,236 | +1,138 (+8.8%) | August 31, 2026 |
| 6 | Fidelity Nasdaq Composite Index | 0.03% | 4,791 | $11,642 | — | August 31, 2026 |
| 7 | 1290 VT Micro Cap K | 0.01% | 2,468 | $5,997 | — | August 31, 2026 |
| 8 | Vanguard U.S. Eq Idx £ Acc | 0.01% | 1,970 | $4,787 | — | August 31, 2026 |
| 9 | Knights of Columbus U.S. All Cap Idx I | <0.01% | 57 | $139 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
SCWO insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-12-16 | Stephen J Jones | Buy | $2.30 | 45,000 | $103,500 |
| 2025-12-16 | Kline Russell | Buy | $2.20 | 2,000 | $4,400 |
| 2025-10-23 | Yaacov Nagar | Sell | $4.30 | 47,321 | $203,480 |
| 2025-10-22 | Yaacov Nagar | Sell | $4.20 | 3,279 | $13,772 |
| 2025-10-22 | Yaacov Nagar | Sell | $4.20 | 6,100 | $25,620 |
| 2025-10-21 | Yaacov Nagar | Sell | $4.20 | 28,439 | $119,444 |
| 2025-10-20 | Yaacov Nagar | Sell | $4.20 | 1,333 | $5,599 |
| 2025-10-17 | Yaacov Nagar | Sell | $4.20 | 13,168 | $55,306 |
| 2025-10-16 | Yaacov Nagar | Sell | $5.10 | 8,541 | $43,559 |
| 2025-10-15 | Yaacov Nagar | Sell | $5.20 | 36,386 | $189,207 |
| 2025-10-14 | Yaacov Nagar | Sell | $5.20 | 70,000 | $364,000 |
| 2025-10-08 | Yaacov Nagar | Sell | $4.60 | 149,900 | $689,540 |
| 2025-10-07 | Yaacov Nagar | Sell | $3.90 | 100 | $390 |
| 2025-09-08 | Yaacov Nagar | Sell | $4.00 | 5,485 | $21,940 |
| 2025-09-05 | Yaacov Nagar | Sell | $3.90 | 12,243 | $47,748 |
| 2025-08-29 | Yaacov Nagar | Sell | $3.90 | 2,271 | $8,857 |
| 2025-08-20 | Kline Russell | Buy | $2.40 | 2,000 | $4,800 |
| 2025-06-27 | Yaacov Nagar | Sell | $4.20 | 2,339 | $9,824 |
| 2025-06-26 | Yaacov Nagar | Sell | $4.20 | 10,337 | $43,415 |
| 2025-06-24 | Yaacov Nagar | Sell | $4.20 | 5,994 | $25,175 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
SCWO shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns SCWO
Institutional investors own 10.3% of 374Water's shares and insiders 42.98%. The largest holder is Vanguard Capital Management, LLC with 1.82% of the shares (323K), as of June 30, 2026. Among the top 20 institutions, 6 added shares and 5 reduced their stake in the latest filings. Short interest is 1.59% of the float, or 3.19 days of average trading volume. The share count rose 388.1% since 2014.
Related: SCWO key metrics. See the SCWO stock overview for the latest quote and news.
SCWO ownership FAQ
Who owns the most 374Water stock?
The largest shareholders of 374Water are Vanguard Capital Management, LLC (1.82%), CapTrust Financial Advisors (1.17%), Hamilton Lane Advisors LLC (0.90%), Davidson D A & Co (0.84%), BlackRock Inc (0.67%).
What percentage of 374Water is owned by institutions?
Institutions hold 10.3% of 374Water's shares outstanding; insiders hold 42.98%.
Which funds own 374Water?
The largest fund holders of 374Water are Vanguard MStar Total Stk Mkt Idx Invest (1.21%), Fidelity Extended Market Index (0.30%), iShares Micro-Cap ETF (0.20%), Fidelity Series Total Market Index (0.08%), Fidelity Total Market Index (0.08%).
What is 374Water's short interest?
182K shares of 374Water were sold short, 1.59% of the float; at the average daily volume it would take 3.19 days to cover.
Are insiders buying or selling 374Water?
Of the latest 20 reported insider transactions in 374Water (since June 24, 2025), 3 were purchases and 17 were sales.
How many shares of 374Water are outstanding?
374Water has 17.7M shares outstanding, of which 10.2M are in the public float.