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The whole lifecycle, verified against the filings.
Rumor → LOI → definitive → approved
Summed over 4 of 5 filed.
More equity than the headline, over 3 of 5 measured.
A definitive agreement is signed and the vote is still ahead, so the redemption right survives to it.
| SPAC | Target | Segment | Value | Announced | Vote | SPAC price | Status | ARS | Delivers | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| IRHOIron Horse Acquisition II Corp. | Electra Vehicles, Inc. | Battery | — | Aug 4, 2026 | H2 2026 | $10.06 | +0.9% | Definitive (DA signed) | 71 |
The list is grouped by lifecycle stage and the sort orders rows inside a stage: a vote that has already passed and one still ahead are not the same list. An announced deal is not a closed deal — 0 of the combinations in our record were terminated. A premium to trust is a selling point, not a buying point — and once a vote has passed there is no redemption right left to price against. Every stage, target and figure here is read from the SEC filing that stated it; where a figure is missing it is missing from our record, and the page says so rather than estimating one.
4 of 5 deals in this view carry a dated vote or a stated close period. Where the Vote column is empty, the filings we hold state neither — that is a gap in our record, not a claim that the parties have no timetable.
Sorted inside each stage.
Electra Vehicles, Inc., founded in 2015 by CEO Fabrizio Martini and headquartered in Boston, is a B2B AI-driven cleantech software company focused on unlocking the full potential of battery technology. The company develops cloud-based and onboard software platforms—most notably its flagship EVE-Ai 360 Adaptive Controls and EnPower battery selection and simulation tools—that use artificial intelligence to monitor, manage, and optimize battery systems across a wide range of applications. Electra's data models are built upon an extensive dataset of over 300 battery and capacitor chemistries, enabling its software to dynamically manage battery packs based on individual driver and vehicle conditions, thereby increasing lifetime and range while reducing warranty expenses for suppliers and OEMs. While its initial focus was the eMobility market—passenger and commercial electric vehicles—the company has expanded its technology into adjacent sectors including Battery Energy Storage Systems (BESS), robotics, eVTOLs, aerospace, and grid applications, positioning its software as essential infrastructure for the broader electrification economy. Electra's customer strategy centers on major Tier 1 automotive suppliers and OEMs, with the company establishing a strategic branch in Italy's Piedmont Region to be near leading European automakers such as Porsche, Ferrari, and Lamborghini. BlackBerry Limited became a strategic investor through its BlackBerry IVY Innovation Fund, with the BlackBerry IVY platform—built in partnership with AWS—providing edge computing capabilities to enable Electra's responsive battery management. The company raised a total of $24.6 million across three funding rounds, beginning with a grant from MassChallenge in 2016, a $3more ▾less ▴ |
| RENEFCartesian Growth II | InoBat | Battery | $575M | Jul 27, 2026 | — | Definitive (DA signed) | — | extended to Aug 2027; $32.5M redeemed |
| SPKLSpark I Acquisition Corp | ZincFive, Inc. | Battery | $600M | Jun 11, 2026 | Sep 25, 2026 · 14d | $11.58 | -15.2% | Definitive (DA signed) | 50Premium risk50Premium risk |
| TDACTranslational DevelopmentNo date ahead | ProLogium | Battery | $3.8B | May 27, 2026 | H2 2026 | $10.90 | -1.6% | Definitive (DA signed) | 6767 | Taiwan/France |
| PLMKPlum IVNo date ahead | Controlled Thermal Resources | Battery | $3.1B | Mar 8, 2026 | H2 2026 | $10.65 | +0.4% | Definitive (DA signed) | 6767 | Controlled Thermal Resources Holdings, Inc. (CTR) is a U.S.-based developer of integrated geothermal power and critical minerals projects, headquartered in Imperial County, California, with additional offices in Brisbane, Australia, and Houston, Texas. Founded in 2013 and originally Australian-rooted before redomiciling to the United States in 2022, the company is focused on its flagship Hell's Kitchen Project in California's Imperial Valley, situated within the Salton Sea Geothermal Field. CTR operates through two wholly owned subsidiaries, American Data Power and American Critical Resources, pursuing a vertically integrated engineering model that generates renewable baseload geothermal electricity while simultaneously extracting and refining battery-grade lithium and other critical minerals from the same geothermal brine resource. The project is designed at full scale to deliver up to 650 megawatts of clean power and approximately 100,000 metric tons per year of lithium carbonate, along with additional U.S.-designated critical minerals including potash, zinc, manganese, rubidium, cesium, boron, and strontium. CTR's direct lithium extraction process uses a closed-loop system powered entirely by renewable energy, avoiding the environmental footprint of evaporation ponds or open-pit mining and requiring no offshore processing. The company is led by CEO Rod Colwell, who also serves on California's Lithium Valley Commission, alongside President Jim Turner, CFO Eric Thayer, Chief of Staff Nicole Colwell, and Chief Communications Officer Lauren Rose, with a board that includes directors David Jackson, Nicholas Cavanagh, and Kemsley Cross, and former Australian Foreign Minister Julie Bishop as a special advisor. The leadership team brings over three decades of experience developing and operating large-scale geothermal energy projects in the Salton Sea region. CTR has raised more than $285 million in private capital to date, with investors including Stellantis, the California Energy Commission, and angel investors, according to PitchBook data. The company has secured a 25-year power purchase agreement with Imperial Irrigation District and has a supply contract with General Motors for battery-grade lithium. Technical and engineering partnerships include Baker Hughes, which completed a comprehensive Field Development Plan and a Definitive Feasibility Study compliant with SEC SK1300 standards, as well as Aquatech for integrated brine processing and Hatch Ltd for engineering. CTR has demonstrated its direct lithium extraction process on live geothermal brine at a 1/15 commercial-scale integrated facility and has invested approximately $185 million in long-lead equipment staged for construction. In March 2026, CTR announced a definitive business combination agreement with Plum Acquisition Corp. IV (Nasdaq: PLMK), a special purpose acquisition company, at a pro forma enterprise value of approximately $4.7 billion and a pro forma equity value of roughly $5.0 billion. The transaction, unanimously approved by both boards, will result in CTR becoming a publicly traded company on the Nasdaq under the ticker symbol "CTRH," with CTR shareholders rolling over 100% of their equity and expected to own approximately 90.6% of the combined company. The deal includes an earnout provision of up to 100 million shares over ten years tied to share price milestones, a domestication to Delaware, lock-up agreements, and an amended registration rights framework. The merger is expected to close in the second half of 2026, subject to shareholder approvals, SEC registration effectiveness, HSR Act clearance, and other customary conditions. Hall Chadwick served as CTR's exclusive corporate, financial, and lead capital markets advisor, while Cohen & Company Capital Markets advised Plum IV. CTR is going public via SPAC to accelerate its development timeline and fund the commencement of Stage 1 construction at Hell's Kitchen, which is anticipated to include a 50 MW |