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California, USA · Private · antora.energy
Thermal batteries (heated carbon blocks) for industrial heat and power
Open roles
41
▲ 1 since 2026-10-30
Federal awards
$26M
6 grants, contracts, loans
Last private raise
$458M
Form D · 2026-07-20
SEC filings
2
latest 2026-08-04
Coming up
POLICY45Z: clean fuels
Extended through Dec 31, 2029; extra sustainable aviation fuel bonus ended after 2025. Affects POET Big Stone thermal battery.
+ THESISPOLICY45Y / 48E: all other clean power and storage
Full credit for projects beginning construction through 2033; 75% for 2034 starts, 50% for 2035, none from 2036. Affects Long-duration storage.
+ THESISHIRING41 open roles (+1 since Oct 30, 2026)
Biggest teams: Product Development 17, Commercial 8, Finance 3, Heat to Power 3.
+ THESISFUNDING · PRATT ENERGY THERMAL BATTERYEquity: Copenhagen Infrastructure Partners (lead); Grok Ventures; University Pension Plan Ontario
Closed · Third-party project equity; amount not disclosed
ess-news.com →+ THESISPROJECT · PRATT ENERGY THERMAL BATTERYAntora and Pratt Energy announce the 5.8 GWh project with CIP-led equity
Pratt Energy biorefinery, Pratt, KS
ess-news.com →+ THESISFUNDING · POET BIG STONE THERMAL BATTERYEquity: Grok Ventures (with Antora)
Closed · Project-level equity; amount not disclosed
enkiai.com →+ THESISFEDERAL AWARDDepartment of Energy grant$15M
Industrial processes require continuous heat and power that, currently, only fossil fuels can provide reliably and cost-effectively, making the industrial sector the largest source
usaspending.gov →+ THESISFEDERAL AWARDDepartment of Energy grant$2.0M
High-efficiency solid-state waste heat recovery for iron and steelmaking
usaspending.gov →+ THESISFEDERAL AWARDNational Science Foundation grant$1.2M
Sbir phase ii: research and development of production-scale high-efficiency thermal photovoltaic (tpv) cells to enable ultra-low cost energy storage.
usaspending.gov →+ THESISProof5 GWh thermal battery commissioned at POET's Big Stone biorefineryMay 15, 2026enkiai.com
NextMore industrial sites
Supply-chain security
Secured · Contracted · At risk · Unknown — rated only on public evidence; Unknown means nothing has been disclosed.
Sources: company job boards (daily), SEC EDGAR, USAspending.gov, and the reviewed technology spreadsheets. Public records only cover US entities, so foreign companies and private firms that don't file will show gaps.
How it works
Cheap electricity heats bricks or carbon blocks to well over 1,000°C. The stored heat comes back out as factory heat or steam hours later.
OPEN IN 3D →Others on this approach
Money behind this company's projects. Company-wide raises are listed but not counted in totals.
Read from SEC 8-Ks (bankruptcy, default, delisting, restatement, impairment, restructuring), cash runway in annual reports, Form D raises and the 30-day hiring trend. A prompt to look closer, not a credit rating.
2026-10-302026-11-09
Teams moving over 30 days: Product Development -1 (now 17), Commercial +1 (now 8), Finance +1 (now 3)
By team
By location
Companies file a Form D within 15 days of selling shares privately. “Sold” is the amount raised so far in that offering; amended notices (D/A) update earlier ones.
| First sale | Notice | Offered | Sold |
|---|---|---|---|
| 2026-07-20 | D · filed 2026-08-04 | $550M | $458M |
| 2025-07-25 | D · filed 2025-11-03 | $77M | $72M |
Matched recipient: ANTORA ENERGY, INC.
Critical inputs
Policy that applies
No minerals, policies or partners linked yet. Add them in the review spreadsheet.
Only Form D notices on file (shown at left).