HARPOON THERAPEUTICS, INC.
HARPOON THERAPEUTICS, INC. is a registered legal entity registered in United States under 3780782, and its current status with California Secretary of State — bizfile Online is active. The company was incorporated on 29 April 2015 and lists its registered address as RAHWAY, United States. 5 shareholders are on record for HARPOON THERAPEUTICS, INC., and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from California Secretary of State — bizfile Online and was last updated on 4 October 2026.
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Shareholders
5
Five shareholders are currently on record for HARPOON THERAPEUTICS, INC., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing.
The largest of these is BioImpact Capital LLC, holding 18.6% — the largest recorded stake — followed by New Leaf Venture Partners, L.L.C. at 18.3%; the remaining 3 shareholders shown hold smaller stakes.
The register reports 20 shareholders in total, though only the top 5 by holding are shown in this view.
Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| BioImpact Capital LLC | 18.6% | California Secretary of State — bizfile Online | |
| New Leaf Venture Partners, L.L.C. | 18.3% | California Secretary of State — bizfile Online | |
| MPM Asset Management, LLC | 18.2% | California Secretary of State — bizfile Online | |
| Franklin Resources, Inc. | 7.7% | California Secretary of State — bizfile Online | |
| Vanguard Group Inc | 6.7% | California Secretary of State — bizfile Online |
Officers
5
The President/chief Executive Officer of HARPOON THERAPEUTICS, INC. currently on record is GERALD MCMAHON; five officers are currently on record for HARPOON THERAPEUTICS, INC., filed with California Secretary of State — bizfile Online.
The register reports 16 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at HARPOON THERAPEUTICS, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
Group Structure
HARPOON THERAPEUTICS, INC. sits 2 levels below its ultimate parent, Merck & Co., Inc., registered in United States. The full chain up to Merck & Co., Inc. is derived by walking shareholder filings across jurisdictions; no link in it is independently corroborated by HARPOON THERAPEUTICS, INC.'s own shareholder record.
Merck & Co., Inc.
United States
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Frequently Asked Questions
Who owns HARPOON THERAPEUTICS, INC.?
Five shareholders are currently on record for HARPOON THERAPEUTICS, INC., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is BioImpact Capital LLC, holding 18.6% — the largest recorded stake — followed by New Leaf Venture Partners, L.L.C. at 18.3%; the remaining 3 shareholders shown hold smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is HARPOON THERAPEUTICS, INC.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for HARPOON THERAPEUTICS, INC. is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does HARPOON THERAPEUTICS, INC. have on record?
5 shareholders are shown on record for HARPOON THERAPEUTICS, INC.. The register reports 20 in total; only the top 5 by holding are shown here.
What is HARPOON THERAPEUTICS, INC.'s company registration number?
HARPOON THERAPEUTICS, INC.'s registration number is 3780782, filed with California Secretary of State — bizfile Online in United States. Its current status on the register is active.
Is HARPOON THERAPEUTICS, INC. still an active company?
HARPOON THERAPEUTICS, INC.'s status on California Secretary of State — bizfile Online is listed as active.
When was HARPOON THERAPEUTICS, INC. incorporated?
HARPOON THERAPEUTICS, INC. was incorporated on 29 April 2015, according to California Secretary of State — bizfile Online.
What is HARPOON THERAPEUTICS, INC.'s registered address?
The registered address on file for HARPOON THERAPEUTICS, INC. is RAHWAY, United States.
Who are the officers/directors of HARPOON THERAPEUTICS, INC.?
The President/chief Executive Officer of HARPOON THERAPEUTICS, INC. currently on record is GERALD MCMAHON; five officers are currently on record for HARPOON THERAPEUTICS, INC., filed with California Secretary of State — bizfile Online. Management authority at HARPOON THERAPEUTICS, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Does HARPOON THERAPEUTICS, INC. have a parent company or subsidiaries?
HARPOON THERAPEUTICS, INC. sits 2 levels below its ultimate parent, Merck & Co., Inc., registered in United States.
Can Zavia monitor changes to HARPOON THERAPEUTICS, INC.'s ownership over time?
This profile reflects a point-in-time snapshot from California Secretary of State — bizfile Online. Zavia's monitoring API can track changes to HARPOON THERAPEUTICS, INC.'s registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access HARPOON THERAPEUTICS, INC.'s data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United States, so records like HARPOON THERAPEUTICS, INC.'s registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from California Secretary of State — bizfile Online and was last synced on 4 October 2026.