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Livermore
Livermore
ZHEN

Gagnon Advisors, LLC

SEC CIK
0001599466
Latest filing
Aug 4, 2026

The latest 13F from Gagnon Advisors, LLC covers Q2 2026 (filed Aug 4, 2026): 23 long positions worth $157.3M. The top 10 holdings make up 67.2% of the portfolio, and the largest is CareDx, Inc. (CDNA) at 9.9%. Livermore has 23 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q2 2026

Share counts compared with Q1 2026: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.

Full comparison
New
4
Est. +$16.7M
Added
5
Est. +$5.95M
Reduced
0
Sold out
3
Est. −$22.7M

Top 5 holdings

Share of this quarter's portfolio value

  1. CDNACareDx, Inc.
    9.9%$15.6MHistory
  2. AMRCAmeresco, Inc.
    8.3%$13.0MHistory
  3. EPDEnterprise Products Partners L.P.
    7.9%$12.5MHistory
  4. WGSGeneDx Holdings Corp.
    7.8%$12.2MHistory
  5. EQIXEquinix Inc
    7.1%$11.2MHistory

Biggest buys

New and added positions, by estimated amount bought

  1. 0000000000
    +$6.12MNew
  2. TMCITreace Medical Concepts, Inc.
    +$6.11MNewHistory
  3. QDELQuidelOrtho Corp
    +$4.22MNewHistory
  4. HNGEHinge Health, Inc.
    +$2.70MAddedHistory
  5. WGSGeneDx Holdings Corp.
    +$2.04MAddedHistory

Largest weight increases

New and added positions, by percentage points of the portfolio gained

  1. 0000000000
    +3.89 pp0.0% → 3.9%
  2. TMCITreace Medical Concepts, Inc.
    +3.88 pp0.0% → 3.9%History
  3. HNGEHinge Health, Inc.
    +3.69 pp2.3% → 6.0%History
  4. CDNACareDx, Inc.
    +3.11 pp6.8% → 9.9%History
  5. QDELQuidelOrtho Corp
    +2.69 pp0.0% → 2.7%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. NVGSNavigator Holdings Ltd.
    −$10.4MSold outHistory
  2. iShares Tr46436E718
    −$9.63MSold out
  3. AOSLAlpha & Omega Semiconductor Ltd
    −$2.66MSold outHistory

Largest weight decreases

Reduced and sold-out positions, by percentage points of the portfolio lost

  1. NVGSNavigator Holdings Ltd.
    −7.68 pp7.7% → 0.0%History
  2. iShares Tr46436E718
    −7.08 pp7.1% → 0.0%
  3. AOSLAlpha & Omega Semiconductor Ltd
    −1.96 pp2.0% → 0.0%History

Metrics

13F metrics for Q2 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$157.3M
+$21.3M (+15.7%) vs. prior quarter
Positions
23
+1 vs. prior quarter
Top 10 concentration
67.2%
Top 10 as share of value
Turnover
15.5%
Q2 2026, one quarter
Average holding period
15.5 quarters
Weighted by value

How these are calculated

  • Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
  • Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
  • Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
  • Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q1 2021), so positions held before then are understated.

13F filings by quarter

22 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $263.1M (Q2 2021)

Q1 2021: $242.9MQ2 2021: $263.1MQ3 2021: $252.1MQ4 2021: $251.7MQ1 2022: $217.1MQ2 2022: $165.1MQ3 2022: $154.4MQ4 2022: $148.2MQ1 2023: $149.0MQ2 2023: $149.4MQ3 2023: $119.5MQ4 2023: $114.5MQ1 2024: $115.3MQ2 2024: $131.3MQ3 2024: $154.8MQ4 2024: $156.2MQ1 2025: $141.8MQ2 2025: $148.8MQ3 2025: $162.0MQ4 2025: $157.5MQ1 2026: $135.9MQ2 2026: $157.3M
Q1 2021Q2 2026
13F filings of Gagnon Advisors, LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 4, 202623$157.3MCDNAAMRCEPDvs. Q1 2026SEC
Q1 2026Apr 22, 202622$135.9MEPDAMRCEQIXvs. Q4 2025SEC
Q4 2025Feb 13, 202623$157.5MWGSAMRCALvs. Q3 2025SEC
Q3 2025Nov 3, 202524$162.0MAMRCWGSFRSHvs. Q2 2025SEC
Q2 2025Jul 23, 202524$148.8MWGSPSIXALvs. Q1 2025SEC
Q1 2025May 12, 202528$141.8MEPDWGSALvs. Q4 2024SEC
Q4 2024Jan 24, 202526$156.2MWGSPSIXEPDvs. Q3 2024SEC
Q3 2024Nov 12, 202427$154.8MPSIXCDNAWGSvs. Q2 2024SEC
Q2 2024Aug 14, 202427$131.3MEPDCDNAALvs. Q1 2024SEC
Q1 2024May 13, 202427$115.3MALEPDNVGSvs. Q4 2023SEC
Q4 2023Feb 14, 202426$114.5MALNVGSEPDvs. Q3 2023SEC
Q3 2023Nov 14, 202328$119.5MALNVGSEPDvs. Q2 2023SEC
Q2 2023Aug 8, 202329$149.4MNVGSALETWOvs. Q1 2023SEC
Q1 2023Apr 10, 202328$149.0MNVGSALNEWRvs. Q4 2022SEC
Q4 2022Feb 7, 202329$148.2MAPENNVGSALvs. Q3 2022SEC
Q3 2022Nov 14, 202232$154.4MNVGSAMRCPCRXvs. Q2 2022SEC
Q2 2022Aug 1, 202233$165.1MPCRXNVGSALvs. Q1 2022SEC
Q1 2022May 9, 202233$217.1MPCRXAMRCALvs. Q4 2021SEC
Q4 2021Feb 8, 202234$251.7MAOSLPCRXAMRCvs. Q3 2021SEC
Q3 2021Nov 12, 202135$252.1MCDNABLAMRCvs. Q2 2021SEC
Q2 2021Jul 28, 202132$263.1MCDNAAMRCBLvs. Q1 2021SEC
Q1 2021Jul 28, 2021Amended30$242.9MCDNAAMRCAOSL–SEC

13D and 13G filings

Companies where Gagnon Advisors, LLC reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

Gagnon Advisors, LLC does not currently report owning 5% or more of any company.

Latest filings

19 filings on file made by Gagnon Advisors, LLC or listing it as a reporting person, newest first.

Schedule 13D and 13G filings by Gagnon Advisors, LLC
CompanyFiled (ET)FilerFormStakeChangeEvent dateFiling
AMRCAmeresco, Inc.Aug 27, 20263:34 PM ETGagnon Securities LLCand 2 others13G5.00%1.76M shares+0.10 ppfrom 4.90%Aug 20, 2026SEC
OSUROrasure Technologies IncAug 12, 20266:06 PM ETGagnon Securities LLCand 2 others13G5.80%8.87M sharesNewAug 5, 2026SEC
CDNACareDx, Inc.Aug 7, 20265:49 PM ETGagnon Securities LLCand 2 others13G/A4.40%2.29M shares−1.50 ppfrom 5.90%Below 5%Jul 31, 2026SEC
OSUROrasure Technologies IncApr 8, 20266:34 PM ETGagnon Securities LLCand 2 others13G5.40%3.75M shares+0.50 ppfrom 4.90%Jan 8, 2026SEC
TMCITreace Medical Concepts, Inc.Feb 12, 20265:57 PM ETGagnon Securities LLCand 2 others13G/A9.60%6.14M shares+3.30 ppfrom 6.30%Dec 31, 2025SEC
OSUROrasure Technologies IncFeb 12, 20265:56 PM ETGagnon Securities LLCand 2 others13G/A4.90%3.57M shares−0.10 ppfrom 5.00%Below 5%Dec 31, 2025SEC
CNFCNFinance Holdings Ltd.Feb 12, 20265:55 PM ETGagnon Securities LLCand 2 others13G/A6.80%93.3M shares0.00 ppfrom 6.80%Dec 31, 2025SEC
CDNACareDx, Inc.Feb 12, 20265:54 PM ETGagnon Securities LLCand 2 others13G/A5.90%3.05M shares+0.70 ppfrom 5.20%Dec 31, 2025SEC
OSUROrasure Technologies IncNov 17, 20254:06 PM ETGagnon Securities LLCand 2 others13G5.00%3.59M sharesNewNov 11, 2025SEC
CNFCNFinance Holdings Ltd.Nov 14, 20253:42 PM ETGagnon Securities LLCand 2 others13G/A6.80%93.3M shares–Sep 30, 2025SEC
AMRCAmeresco, Inc.Oct 24, 20254:02 PM ETGagnon Securities LLCand 2 others13G/A4.90%1.72M shares–Below 5%Sep 30, 2025SEC
CDNACareDx, Inc.Jul 24, 20254:28 PM ETGagnon Securities LLCand 2 others13G5.20%2.89M shares–Jul 17, 2025SEC
TMCITreace Medical Concepts, Inc.May 15, 20254:30 PM ETGagnon Securities LLCand 2 others13G6.30%3.98M sharesNewMay 9, 2025SEC
CNFCNFinance Holdings Ltd.Mar 12, 20259:23 PM ETGagnon Neiland 2 others13G5.10%70.4M sharesNewFeb 27, 2025SEC
AMRCAmeresco, Inc.Mar 10, 20256:26 PM ETGagnon Neiland 2 others13G5.00%1.74M shares–Mar 3, 2025SEC
PSIXPower Solutions International, Inc.Feb 14, 20251:17 PM ETGagnon Neiland 2 others13G/A5.00%1.14M shares–Feb 5, 2025SEC
PROFProfound Medical Corp.Jan 23, 20256:38 PM ETGagnon Securities LLCand 2 others13G/A11.20%3.35M shares–Dec 31, 2024SEC
PSIXPower Solutions International, Inc.Jan 23, 20256:02 PM ETGagnon Securities LLCand 2 others13G/A7.30%1.68M shares0.00 ppfrom 7.30%Dec 31, 2024SEC
PSIXPower Solutions International, Inc.Jan 23, 20256:02 PM ETGagnon Securities LLCand 2 others13G/A7.30%1.68M shares–Dec 31, 2024SEC