Fundraising Fox

Slingshot Biosciences

Emeryville, US · Founded 2012 · Delaware corporation · 60 employees on LinkedIn · 3 known investors

Slingshot Biosciences makes synthetic cell mimics used as standardized reference controls for flow cytometry and cell-based assays.

Also known as SLBI · Slingshot Bio · Slingshot Biosciences, Inc.

Founders & leadership

Slingshot Biosciences was founded in 2012 by Jeffrey Kim and Jeff Kim.

JK
Jeffrey KimCo-founder
JKJeff Kim
Jeff KiminFounder
AW
Adam WieschhausNamed on SEC filing
RJ
Ronald J. SilbermanNamed on SEC filing

Board

CRCorey Ritter
Corey Ritterin𝕏Board MemberPartner at ARCH Venture Partners

Investors · 3

Reported raises · per SEC filings

Form D private placements

$49.1M disclosed across 2 rounds · 2021–2023

$26.2MraisedApr 2024 · 10 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Nicolas BarthelemyDirector
  • Patrick WeissDirector
  • Corey RitterDirector
  • Andrew LeeDirector
  • Ronald J SilbermanDirector
  • Jeffrey KimExecutive Officer, Director
Offering amount
$26.2M
Amount sold
$26.2M
First sale
Jan 2023
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR ↗
$22.9MraisedJul 2021 · 17 investors · Other
Rule 506(b)
Officers, directors & promoters on the filing
  • Adam WieschhausDirector
  • Corey RitterDirector
  • Jeffrey KimExecutive Officer, Director
  • Ronald J. SilbermanDirector
Offering amount
$22.9M
Amount sold
$22.9M
First sale
May 2021
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Company profile

researched Aug 2026

Slingshot Biosciences is an Emeryville, California life sciences company that develops and manufactures synthetic cell mimics — polymer-based particles engineered to imitate human cells — for use as standardized reference materials and controls in cell-based assays [0][3][6]. The products are positioned as replacements for biologically derived reagents in flow cytometry, assay validation, instrument calibration and harmonization, and quality control across diagnostics, drug discovery, clinical trials, and cell therapy manufacturing [0][3].

The company markets a family of branded product lines including FlowCytes, TruCytes, PhenoCytes, QuantCytes, StimCytes, ViaComp, ViaComp-Ultra-Amine, and ScatterBridge, addressing applications such as spectral unmixing and compensation, immunophenotyping controls, quantitative antigen density, instrument standardization, and functional CAR-T benchmarking [1]. Products are described as printed on demand and customizable to specific biomarkers and phenotypes, including rare markers such as Ki-67 and CD3 T-cell mimics used in CAR-T validation [0][3].

Leadership includes Glenn Bilawsky (Chief Executive Officer), Nimisha Srivastava (Chief Operating Officer), Bevan Annaloro (SVP & General Counsel), Jim Snook (Sr. Global Sales), Tony Szeto (VP, Head of Finance), and Josh Haydon (Head of Marketing); the board is chaired by Nicolas Barthelemy and includes founder Jeffrey Kim, Andrew Lee, Corey Ritter, Patrick Weiss, and Chris Williams, with Keith Crandell and Philip Austin as board observers [0]. Other sources list Jeff Kim as Co-Founder, CEO and President and William (Bill) Hyun as a board member [3][6]; these leadership descriptions are inconsistent across sources.

Founding story

The company was founded in 2012 by Jeff Kim, who is described as bringing a background in material science, MEMS, and bioorthogonal chemistry to the problem of variability in biological samples used for drug development, diagnostics, and cell therapies [3]. The stated founding insight was that stable, non-biological surrogates mimicking human cells could improve assay performance and data integrity [3]. According to one account the team bootstrapped from the basement of Kim's Silicon Valley live-work condo and delivered its first large-scale batch of cell mimics within months of founding [3]. The company's own site says it was founded over 10 years ago after R&D experience revealed shortcomings of biologically derived reagents [0].

Business model

Slingshot Biosciences develops and manufactures synthetic cell mimic products sold as reference controls and reagents to laboratories, researchers, instrument makers, and manufacturers, including customized, made-to-order controls tailored to particular biomarkers and assay requirements [3]. The company describes a manufacturing approach that prints synthetic cells on demand and can flex to any volume, which it says lowers cost and shortens timelines relative to biologically derived reagents [0][3].

Sources indicate sales of catalog and custom synthetic cell control products to life science and clinical customers; no revenue figures are disclosed in the available material [3][5].

Traction

Reported traction includes $49.0M raised across two funding rounds [3], a 2025 product launch of TruCytes Potency CD20 and CD34 stem cell gating controls, collaborations with Cerba Research, Prolocor, Fred Hutch, and Cellares [3], and announced expansion into UK and EU markets in February 2026 [6]. Employee count is listed as 10,000+ by one aggregator [3], a figure that appears inconsistent with other descriptions of the company and is not corroborated elsewhere in the sources.

Latest developments

Recent items reported include the October 2025 launch of TruCytes Potency CD20 and CD34 stem cell gating controls and a partnership with Cellares around its Cell Q platform [3]; a February 4, 2026 announcement of expansion into the UK and EU markets; patent listings dated February 1, 2026 for a synthetic human cell mimic particle for cytometric or Coulter devices, engineered red blood cell mimic particles, and an apoptotic cell mimic; and the March 6, 2026 appointment of Jim Snook as Senior Vice President, Global Sales [6]. Events are scheduled through mid-2026 [1].

Full profile — market position, technology, go-to-market, geography, history, risks & controversies

Market position

Described as a supplier of standardized synthetic reference materials in a market where biological cell variability affects reproducibility in flow cytometry and cell therapy quality control [3]. One source frames its positioning against both biological cells and solid-core particles, and connects demand to growth in cell therapy manufacturing and precision diagnostics [3]. No market share or ranking data appear in the sources.

Sources cite polymer-based mimics said to provide greater stability and lot-to-lot consistency than biological cells and solid-core particles, full customizability for specific and rare biomarkers, on-demand manufacturing that scales to any volume, and reduced QC and bridging-study burden [0][3]. Named collaborations with Cerba Research, Prolocor, Fred Hutch, and Cellares are presented as validation of the approach [3]. These claims originate largely from the company and an aggregator profile rather than independent testing data.

Technology

The platform uses biochemistry and polymer chemistry to create synthetic cells (marketed as FlowCytes and TruCytes) that are printed on demand rather than derived from biological sources [0][3]. The company states the mimics offer optical, fluorescent, and biochemical performance suited to cytometry assays, lot-to-lot consistency, tunability to specific phenotypes including rare biomarkers, and semiconductor-like manufacturing scalability [3]. Patent filings referenced in press mentions cover a synthetic human cell mimic particle for cytometric or Coulter devices, engineered particles as red blood cell mimics, and an apoptotic cell mimic [6].

Go-to-market

The company sells through a global sales organization (a Senior Vice President, Global Sales was appointed in March 2026) and maintains a visible conference and trade-show presence, with in-person and webinar events scheduled for 2026 including Advanced Therapies Week, FlowTex, the NWFCS Flow Cytometry Meeting, TRCCC, SoCal Flow Summit, AACR, Advanced Therapies Xchange, ISCT, and CYTO [1][6]. It also publishes technical content such as blog comparisons of biological versus synthetic TBNK immunophenotyping reference materials [0][1], and works through partnerships and collaborations with organizations including Cerba Research, Prolocor, Fred Hutch, and Cellares [3].

Academic and core laboratories, reference and clinical labs, biopharma and CDMOs in cell and gene therapy, cell therapy manufacturers, and instrument manufacturers [1]. End applications span immunology, oncology, gene therapy, diagnostics, and cell therapy manufacturing quality control [3].

Geography

Headquartered in Emeryville, California, US [3][6]. In February 2026 the company announced expansion into the United Kingdom and European Union markets [6]. Scheduled 2026 events span US locations (Boston, Champion PA, Houston, Irvine, San Diego, Seattle, West Palm Beach) and Dublin, Ireland [1].

History

Founded in 2012 [3][6], the company spent an extended period in development before raising a $23M Series A in July 2021 and a further $26M Series A in February 2023 [3]. Product and partnership activity reported for 2025 includes the TruCytes Potency CD20 and CD34 gating control launch and integration work with the Cellares Cell Q platform [3]. In early 2026 the company announced expansion into the UK and EU and the appointment of a Senior Vice President of Global Sales, and several cell-mimic patents were listed among its press mentions [6].

Risks & controversies

No controversies, litigation, or regulatory actions are reported in the available sources. Data quality caveats exist: the aggregator profile lists an employee count of 10,000+ that is not corroborated and appears implausible for a company of this description, classifies the company under Software/AI/Data industries on one platform, and labels both the 2021 and 2023 rounds as "Series A" while a company press-release URL references a "Series A3" financing of $11 million whose details are not retrievable from the fetched page content [1][2][3][4][6]. Leadership listings also conflict between the company site (Glenn Bilawsky as CEO) and third-party profiles (Jeff Kim as CEO and President) [0][3][6]. Financial statements are not publicly disclosed [5].

Compiled by commissioned research from 7 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
EmployeesJan 202610000+
Funding rounds countFeb 2023$2
Total funding raisedFeb 2023$49M
Years in operation at time of statementJan 2026founded over 10 years ago

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Timeline · 6

launches, deals, and filings
Mar 2026
Jim Snook appointed Senior Vice President, Global Sales

Company announced the appointment of Jim Snook as Senior Vice President, Global Sales.

source ↗

Feb 2026
Expansion into United Kingdom and European Union markets

Press release announcing expansion of operations into the UK and EU markets.

source ↗

Oct 2025
TruCytes Potency CD20 & CD34 Stem Cell Gating Controls launched

Launch of TruCytes Potency CD20 and CD34 stem cell gating controls.

source ↗

Jan 2025
Partnership with Cellares for Cell Q platform integration

Collaboration with Cellares to integrate Slingshot's synthetic cell mimics with the Cell Q platform for cell therapy automation and quality control.

source ↗

Feb 2023
$26M Series A

Additional $26 million Series A financing led by ARCH Venture Partners and Northpond Ventures, with Anterra Capital participating.

$26M source ↗

Jul 2021
$23M Series A

Series A financing of $23 million led by Northpond Ventures with participation from ARCH Venture Partners and Anterra Capital.

$23M source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

Legal entities · 1

corporate structure
Slingshot BiosciencesDelaware

In the news

Research sources · 7

primary sources listed

7 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Slingshot Biosciences do?
Slingshot Biosciences makes synthetic cell mimics used as standardized reference controls for flow cytometry and cell-based assays.
Who founded Slingshot Biosciences?
Slingshot Biosciences was founded by Jeffrey Kim, Jeff Kim in 2012.
Who are Slingshot Biosciences's investors?
Slingshot Biosciences's investors include ARCH Venture Partners, Anterra Capital, Northpond Ventures.
How much funding has Slingshot Biosciences raised?
Slingshot Biosciences has disclosed $49.1M raised across 2 rounds.
Where is Slingshot Biosciences headquartered?
Slingshot Biosciences is headquartered in Emeryville, US.