Sling Therapeutics Funding, Investors & Competitors

Sling Therapeutics has raised $158M across 2 funding rounds, most recently a $123M Series C in September 2026.

Last Sling Therapeutics funding round

$123M

Series C · Sep 2026

Cumulative funding Sling Therapeutics raised

$158M

across 2 funding rounds

Key investors in Sling Therapeutics

  • TPG
  • Forbion Capital Partners
  • The Rise Fund
  • Sectoral Asset Management

Sling Therapeutics Overview

About Sling Therapeutics

Austin-based Sling Therapeutics is a clinical-stage biopharmaceutical company advancing teprotumumab for thyroid eye disease treatment. Its Phase 3 trials demonstrate reduced proptosis and diplopia in patients, with BLA submission planned to FDA. The therapy targets IGF-1R pathway in orbital fibroblasts.


Founded

2020

HQ

United StatesAnn Arbor, MI

Status

Privately held

Customer focus

B2C

Revenue model

Product sales

Sling Therapeutics Funding History

Sling Therapeutics has raised a total of $158M across 2 funding rounds.

Sling Therapeutics' first fundraising round was a $35M Series A in June 2022. The most recent completed round was a $123M Series C in September 2026.

Sling Therapeutics funding rounds

Sling Therapeutics funding rounds
DateStageInvestorsRaisedDeal Summary
Sep 2026Series CForbion Capital Partners (lead); Sectoral Asset Management; TPG$123MForbion Capital Partners led Sling Therapeutics’ $123 million Series C financing in September 2026, with participation from TPG Life Sciences Innovations and Sectoral Asset Management. The round was announced and closed on September 16, 2026. Proceeds will advance the global Phase 3 ORBIT trial of linsitinib, an oral IGF-1R inhibitor for thyroid eye disease, toward commercialization. Sling Therapeutics is an Ann Arbor, Michigan-based clinical-stage biopharmaceutical company.
Jun 2022Series AThe Rise Fund (lead)$35MSling Therapeutics, Inc., a biopharmaceutical company based in Ann Arbor, Michigan, launched on June 13, 2022, with a $35 million Series A financing led by TPG’s The Rise Fund to advance its oral small molecule linsitinib for thyroid eye disease (TED). The company had received FDA IND clearance for linsitinib, an investigational IGF-1R inhibitor, and planned to initiate a Phase 2b clinical trial to evaluate its efficacy in reducing treatment burden compared to existing therapies. The funding supports late-stage development of linsitinib, positioned as the first oral therapy entering late-stage trials for TED, based on extensive preclinical and prior clinical data. Peter Bojo from TPG Life Sciences Innovation and Lucian Iancovici, M.D., joined the board on behalf of The Rise Fund. Sling assembled a management team with deep experience in drug development and operations. The Rise Fund, a private equity investor focused on impact, participated as the sole investor noted.

Who has invested in Sling Therapeutics?

4 investors have backed Sling Therapeutics across its funding rounds, including TPG, Forbion Capital Partners, The Rise Fund and Sectoral Asset Management.

Lead investors include Forbion Capital Partners and The Rise Fund.


Sling Therapeutics Investors

Investors in Sling Therapeutics by funding rounds participated
InvestorHQRoundsRoleFirst check
Sectoral Asset ManagementCanadaMontreal1ParticipantSep 2026
TPGUnited StatesSan Francisco, CA1ParticipantSep 2026

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Sling Therapeutics Competitors

Sling Therapeutics competitors include listed companies like Eli Lilly, Johnson & Johnson, AbbVie and Merck, and private ones like Biosplice Therapeutics and Biocon Biologics.

Public and private companies comparable to Sling Therapeutics
CompanyHQStatusRevenueEBITDAValuationRevenue Multiple
Eli LillyUnited StatesUnited StatesPublicly listed$65B$28B$1.0T13.0x
Johnson & JohnsonUnited StatesUnited StatesPublicly listed$94B$40B$649B6.8x
AbbVieUnited StatesUnited StatesPublicly listed$61B$17B$468B8.1x
MerckUnited StatesUnited StatesPublicly listed$65B$28B$365B6.2x
Biosplice TherapeuticsUnited StatesSan Diego, CAPrivate--$12B-
Biocon BiologicsIndiaBangalorePrivate$1.1B-$4.5B4.2x

Sling Therapeutics Public Comps

Sling Therapeutics is still privately-owned, but its public comps include Eli Lilly, Johnson & Johnson, AbbVie, Merck, Roche, Novartis, AstraZeneca, Amgen, Gilead Sciences and Novo Nordisk.

Last FYEV/RevenueEV/EBITDA
RevenueEBITDALast FYLTM2027ELast FYLTM2027E
Eli Lilly$65B$28B16.4x13.0x38.7x26.8x
Johnson & Johnson$94B$40B7.2x6.8x16.9x18.2x
AbbVie$61B$17B8.7x8.1x30.7x17.6x
Merck$65B$28B6.3x6.2x14.8x21.4x
Roche$77B$26B5.0x5.0x14.7x12.5x
Novartis$57B$22B5.5x5.5x14.3x13.5x
AstraZeneca$59B$19B4.9x4.7x15.1x13.1x
Amgen$37B$17B7.2x6.9x15.7x15.2x

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Common questions about Sling Therapeutics

When was Sling Therapeutics founded?Sling Therapeutics was founded in 2020.
Where is Sling Therapeutics headquartered?Sling Therapeutics is headquartered in Ann Arbor, MI, United States.
Is Sling Therapeutics publicly listed?No, Sling Therapeutics is a private, VC-backed company.
How much funding has Sling Therapeutics raised?Sling Therapeutics has raised $158M across 2 funding rounds.
What was Sling Therapeutics' last funding round?Sling Therapeutics' last funding round was a $123M Series C in September 2026, led by Forbion Capital Partners.
Who are Sling Therapeutics' investors?Sling Therapeutics' investors include Sectoral Asset Management, TPG, The Rise Fund and Forbion Capital Partners.
Which companies are comparable to Sling Therapeutics?Companies comparable to Sling Therapeutics include Eli Lilly, Johnson & Johnson, AbbVie, Merck, Biosplice Therapeutics and Biocon Biologics.

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