All editions

Edition 12 · Jun 21–Jun 28, 2026 · Signal Log

Nine Triangle rounds surface, led by DG Matrix and Slate

The week's fresh news was a regulatory filing, a pivot, an accelerator award, and a demo day. Alongside it, nine Triangle rounds from December through May, totaling $239 million, led by DG Matrix's $60M for data-center power and Slate Medicines' $130M migraine-therapy launch. Pendo also surfaced, shipping its Novus AI product agent and landing on Fast Company's 2026 Most Innovative list. Every date below is the real announcement date.

15

signals

$239.2M

capital

9 rounds

4

new companies

discovered

$239M

Capital reported

Nine Triangle rounds from December to May

Standout of the week

D

DG Matrix

Morrisville maker of solid-state power transformers for AI data centers

Closed a $60M Series A led by Engine Ventures.

DG Matrix builds solid-state power transformers, its Interport platform, aimed at the electrical load of AI data centers. It is the largest disclosed Triangle figure here, announced February 18. SEC filings record about $30M sold against the offering so far. The full investor list differs across outlets and needs reconciling before any database attachment; Engine Ventures is the confirmed lead.

Haroon InamSubhashish Bhattacharya
Yahoo Finance·Feb 18

Deep dives

Capital

9 rounds

$239 million across nine rounds, spanning Cycle Labs in December to ReFiBuy in May. The weight is in deeptech and biotech: DG Matrix's $60M for data-center power, Slate Medicines' $130M migraine-therapy launch, and Ten63's strategic financing that brought its total past $45M. Ten63's new increment was not disclosed, so it is not in the total. Several investor lists still need reconciling before any are attached in the database.

D

Series A

DG Matrix

$60M

of $60M

This tranche: 100% of total round

Lead: Engine Ventures

With: ABB, Mitsubishi Heavy Industries, Sabanci Climate Ventures, Helios Climate Ventures, Fine Structure Ventures, MCJ

Morrisville. Solid-state transformers for AI data centers. SEC Form D records about $30M sold. Engine Ventures led; investor list reconciled in the edition-8 review pass.

Feb 18
S

Series A

Slate Medicines

$130M

of $130M

This tranche: 100% of total round

Lead: RA Capital Management, Forbion, Foresite Capital

Raleigh. Anti-PACAP antibody for migraine; asset licensed from DartsBio. CEO Gregory Oakes. Co-led by RA Capital, Forbion, and Foresite. A launched-with-financing biotech; the review pass confirmed the Raleigh headquarters in the financing release.

Feb 24
T

Venture

Ten63 Therapeutics

of $45M

This tranche: 0% of total round

Lead: Chugai Venture Fund

With: Gates Foundation, RYSE, K5 Global, Duke Capital Partners, Cape Fear BioCapital, SF Holdings, Black Opal Ventures, Panorama

RTP. Duke and TTIC spinout; AI drug discovery. New increment undisclosed; total funding now past $45M. Gates grant funds an HPV and cervical-cancer program. Mike Dial of Chugai joins the board.

Feb 19
R

Seed

ReFiBuy.ai

$13.6M

of $13.6M

This tranche: 100% of total round

Lead: NewRoad Capital Partners

With: Ridge Ventures, Silicon Road Ventures, Commerce Ventures, Incubate Fund, VELA Partners, G20 Ventures, Knoll Ventures

Raleigh. Agentic commerce, founded by four ChannelAdvisor alumni including Scot Wingo. Oversubscribed.

May 5
S

Series A

SonoVascular

$6M

Lead: Harbright Ventures

Chapel Hill. First close of a Series A, not a completed round. SonoThrombectomy for venous thromboembolism; a first-in-human study reported 100% clot reduction across 10 DVT patients. Harbright is a Cary, NC fund; Robert Ross joins the board.

Feb 3
I

Series B

Incyclix Bio

$5M

of $46.3M

This tranche: 11% of total round

Lead: Hatteras Venture Partners

With: Boxer Capital, RA Capital, Eli Lilly, Cape Fear BioCapital, Eshelman Ventures, Pharmacosmos

RTP. A $5M extension to the Series B, bringing the total to $46.25M. INX-315, a CDK2 inhibitor. Kseniya Simpson of Hatteras joins the board.

Apr 8
C

Series B

Cycle Labs

$9.7M

Lead: First Analysis

With: Cofounders Capital, North Coast Ventures

Raleigh. Enterprise test automation. A Series B-1. SEC Form D records $5.7M sold of a $9.5M offering; reconcile against the $9.7M release figure.

Dec 2

Infrastructure

Two program and product items from this week.