SEEQC remains privately held. Its merger with Allegro Merger Corp was mutually terminated effective August 25, 2026, so the planned Nasdaq listing under "SEQC" is not active.
Pre-IPO quantum computing company profile · Founded 2019 · Elmsford, New York, USA
Company Facts
IPO Status
Allegro SPAC merger terminated
SEEQC shares are not available on public exchanges. See below for listed alternatives with similar technology.
SEEQC remains privately held. Its proposed merger with Allegro Merger Corp was mutually terminated effective August 25, 2026.
The former plan to list SEEQC on Nasdaq under "SEQC" is no longer active. Allegro's traded SPAC shell is not a current proxy for SEEQC ownership.
SEEQC (Scalable Energy-Efficient Quantum Computing) spun out of superconducting-electronics maker Hypres in 2019. Its differentiator is Single Flux Quantum (SFQ) digital chip technology: putting qubit control, readout and error-correction logic on cryogenic chips co-located with the qubits, replacing racks of room-temperature electronics and the wiring bottleneck that limits scaling. It runs its own multi-layer superconducting chip fab in New York.
SEEQC has raised over $125M from investors including Merck, Samsung and Leonardo, plus a $30M extension in January 2025. It announced a merger with Allegro Merger Corp in January 2026, but the parties mutually terminated the agreement effective August 25, 2026. SEEQC remains private and no Nasdaq "SEQC" listing is active. In June 2026 it joined the CHIPS Act-funded NORDTECH program for high-coherence qubit manufacturing.
| Round | Amount | Date | Key Investors | Valuation |
|---|---|---|---|---|
| SPAC merger (terminated) | — | Jan–Aug 2026 | Allegro Merger Corp | ~$1B proposed valuation |
| Series A extension | $30M | Jan 2025 | Booz Allen Ventures, NordicNinja, Merck (M Ventures) | — |
| Earlier rounds | ~$95M | 2019–2023 | M Ventures (Merck), Samsung Catalyst, Leonardo, BlueYard | — |
Rigetti (RGTI) also fabs its own superconducting chips; SEEQC's model is closer to a picks-and-shovels supplier to every superconducting platform.
Related company roadmaps: Official Rigetti quantum roadmap · Official IonQ quantum roadmap
Can you buy SEEQC stock?
No. SEEQC remains privately held after its proposed merger with Allegro Merger Corp was mutually terminated effective August 25, 2026. The former Nasdaq listing plan under "SEQC" is no longer active.
What is SEEQC's ticker symbol?
SEEQC has no active public ticker. The former plan to list it on Nasdaq under "SEQC" ended when SEEQC and Allegro mutually terminated their merger agreement effective August 25, 2026.
What makes SEEQC different from other superconducting companies?
It builds cryogenic digital control chips (SFQ) that sit next to the qubits, replacing room-temperature control racks — a scaling technology it can sell to every superconducting quantum vendor, not just its own systems.
Who has invested in SEEQC?
Merck (M Ventures), Samsung Catalyst, Leonardo, BlueYard, Booz Allen Ventures and NordicNinja, among others — over $125M in total private funding.
More pre-IPO quantum companies
Static profile, updated manually · Last updated 2026-09-04 · Sources: SEEQC ↗ · SEEQC / Allegro Merger Corp registration statement (SEC) ↗ · SEEQC / Allegro merger termination (SEC) ↗