Gagnon Advisors, LLC 13F Portfolio

CIK 1599466 Filing since Q1 2014 Q2 2026 filed Aug 4, 2026
Holdings as of Jun 30, 2026, from the 13F filed Aug 4, 2026.

Portfolio Snapshot

20 positions · Q2 2026

Gagnon Advisors, LLC reported 20 positions worth $137.00M for the quarter ended Jun 30, 2026, up 19.3% on the prior quarter. It opened 3 new positions, added to 5, trimmed 0 and exited 2. Its largest holding is CareDx, Inc. at 11.4% of the portfolio.

Portfolio Value
$137.00M
+19.3% QoQ · +12.7% YoY
Positions
20
3 new · 2 sold out
Top 10 Concentration
75.9%
of portfolio value
Largest Position
CDNA 11.4%
CareDx, Inc.
Net Buying
+$3.47M
$16.57M bought · $13.10M sold
Turnover
10.4%
of the portfolio traded
Top Sector
Healthcare
45.2% of value
Track Record
50
quarters on file since Q1 2014

Portfolio Value & Positions

Value Positions

Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.

Sector Allocation

7 sectors
45.16%
Healthcare
Healthcare45.16%
Technology33.17%
Industrials9.53%
Energy9.12%
Consumer Discretionary2.6%
Financial Services0.218%
Consumer Staples0.213%

Quarterly Buying & Selling

Bought Sold

Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.

Position Changes

How many positions were opened, added to, trimmed or closed each quarter.

Sector Allocation Over Time

Share of reported value in each sector at every quarter end.

HealthcareTechnologyIndustrialsEnergyConsumer DiscretionaryFinancial ServicesConsumer StaplesOtherBasic Materials

Largest Buys

Q2 2026
Holding Change Change % Trade Value Weight
TMCI Treace Medical Concepts, Inc. +1.53M – $6.11M 4.46%
QDEL QuidelOrtho Corp +241.1K – $4.22M 3.08%
HNGE Hinge Health, Inc. +32.5K +40.3% $2.70M 6.86%
WGS GeneDx Holdings Corp. +29.6K +20.0% $2.04M 8.91%
VERX Vertex, Inc. +64.6K +21.7% $741.28K 3.03%
CDNA CareDx, Inc. +14.0K +2.6% $399.03K 11.38%
BYND Beyond Meat, Inc. +13.0K – $291.66K 0.213%
CNF CNFinance Holdings Ltd. +27.7K +34.4% $76.61K 0.218%

Largest Sells

Q2 2026
Holding Change Change % Trade Value Weight
NVGS Navigator Holdings Ltd. -539.9K -100.0% $10.44M Exited
AOSL ALPHA & OMEGA SEMICONDUCTOR Ltd -120.2K -100.0% $2.66M Exited

New Positions

Q2 2026
Holding Shares Trade Value Weight
TMCI Treace Medical Concepts, Inc. +1.53M $6.11M 4.46%
QDEL QuidelOrtho Corp +241.1K $4.22M 3.08%
BYND Beyond Meat, Inc. +13.0K $291.66K 0.213%

Closed Positions

Q2 2026
Holding Shares Sold Trade Value Prior Weight
NVGS Navigator Holdings Ltd. -539.9K $10.44M 9.09%
AOSL ALPHA & OMEGA SEMICONDUCTOR Ltd -120.2K $2.66M 2.32%
Holdings · Q2 2026

20 Positions

As ofJun 30, 2026
Value$137.00M
Top 1075.9%
Avg position$6.85M
# Activity
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Showing 1–15 of 20 positions 13F filings on SEC EDGAR

Tip. Select a row to see that position’s full history at Gagnon Advisors.

About Gagnon Advisors, LLC’s 13F Portfolio

What are Gagnon Advisors, LLC’s largest holdings?

As of its Q2 2026 13F filing, Gagnon Advisors, LLC’s five largest positions were CareDx, Inc. (CDNA) at 11.4%, Ameresco, Inc. (AMRC) at 9.5%, Enterprise Products Partners L.P. (EPD) at 9.1%, GeneDx Holdings Corp. (WGS) at 8.9%, Equinix Inc (EQIX) at 8.2% of the reported portfolio.

How much is Gagnon Advisors, LLC’s portfolio worth?

Gagnon Advisors, LLC reported a 13F portfolio worth $137.00M across 20 positions for Q2 2026. That is up 19.3% from the previous quarter.

What did Gagnon Advisors, LLC buy in Q2 2026?

Its largest purchases by value were Treace Medical Concepts, Inc. ($6.11M), QuidelOrtho Corp ($4.22M), Hinge Health, Inc. ($2.70M). It opened 3 new positions.

What did Gagnon Advisors, LLC sell in Q2 2026?

Its largest sales by value were Navigator Holdings Ltd. ($10.44M), ALPHA & OMEGA SEMICONDUCTOR Ltd ($2.66M). It exited 2 positions entirely.

Where does this data come from?

From the Form 13F-HR reports Gagnon Advisors, LLC files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.

Similar-Sized Institutions

by reported 13F value

13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.