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Livermore
Livermore
ZHEN

Needham Investment Management LLC

SEC CIK
0001167212
Latest filing
Aug 13, 2026

The latest 13F from Needham Investment Management LLC covers Q2 2026 (filed Aug 13, 2026): 176 long positions worth $3.33B. The top 10 holdings make up 38.1% of the portfolio, and the largest is Vicor Corp (VICR) at 6.0%. Livermore has 22 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
13
Est. +$136.4M
Added
76
Est. +$319.7M
Reduced
26
Est. −$66.6M
Sold out
13
Est. −$48.2M

Top 5 holdings

Share of this quarter's portfolio value

  1. VICRVicor Corp
    6.0%$199.0MHistory
  2. AIPArteris, Inc.
    5.7%$190.8MHistory
  3. VSHVishay Intertechnology Inc
    4.9%$163.3MHistory
  4. PDFSPDF Solutions Inc
    4.4%$146.2MHistory
  5. LASRNlight, Inc.
    4.2%$138.7MHistory

Share of portfolio

Top 5 holdings and the other 171 positions, by share of portfolio value

  1. VICR6.0%
  2. AIP5.7%
  3. VSH4.9%
  4. PDFS4.4%
  5. LASR4.2%
  6. Other 171 positions74.8%

Biggest buys

New and added positions, by estimated amount bought

  1. ELMTElmet Group Co.
    +$52.1MNewHistory
  2. CECOCeco Environmental Corp
    +$51.7MAddedHistory
  3. TTITetra Technologies Inc
    +$25.8MAddedHistory
  4. LTRXLantronix Inc
    +$18.5MNewHistory
  5. BMIBadger Meter Inc
    +$17.1MAddedHistory

Largest weight increases

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

  1. VSHVishay Intertechnology Inc
    +2.22 pp2.7% → 4.9%History
  2. VICRVicor Corp
    +1.69 pp4.3% → 6.0%History
  3. ELMTElmet Group Co.
    +1.57 pp0.0% → 1.6%History
  4. CECOCeco Environmental Corp
    +1.43 pp1.2% → 2.6%History
  5. PDFSPDF Solutions Inc
    +1.01 pp3.4% → 4.4%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. THRThermon Group Holdings, Inc.
    −$31.9MSold outHistory
  2. ADTNADTRAN Holdings, Inc.
    −$10.8MReducedHistory
  3. FORMFormfactor Inc
    −$8.96MReducedHistory
  4. ASPNAspen Aerogels Inc
    −$7.98MReducedHistory
  5. HONHoneywell International Inc
    −$6.22MSold outHistory

Largest weight decreases

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

  1. THRThermon Group Holdings, Inc.
    −1.63 pp1.6% → 0.0%History
  2. PLABPhotronics Inc
    −0.68 pp1.2% → 0.6%History
  3. ADTNADTRAN Holdings, Inc.
    −0.60 pp0.8% → 0.2%History
  4. NVMINova Ltd.
    −0.60 pp2.0% → 1.4%History
  5. FORMFormfactor Inc
    −0.36 pp3.0% → 2.6%History

Metrics

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

Portfolio value
$3.33B
+$1.37B (+69.9%) vs. prior quarter
Positions
176
0 vs. prior quarter
Top 10 concentration
38.1%
Top 10 as share of value
Turnover
4.3%
Q2 2026, one quarter
Average holding period
15.2 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 $3.33B (Q2 2026)

Q1 2021: $732.0MQ2 2021: $683.9MQ3 2021: $749.2MQ4 2021: $796.7MQ1 2022: $690.9MQ2 2022: $535.0MQ3 2022: $510.4MQ4 2022: $552.6MQ1 2023: $579.8MQ2 2023: $607.0MQ3 2023: $588.0MQ4 2023: $792.1MQ1 2024: $1.08BQ2 2024: $1.22BQ3 2024: $1.30BQ4 2024: $1.30BQ1 2025: $1.07BQ2 2025: $1.25BQ3 2025: $1.43BQ4 2025: $1.58BQ1 2026: $1.96BQ2 2026: $3.33B
Q1 2021Q2 2026
13F filings of Needham Investment Management LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 13, 2026176$3.33BVICRAIPVSHvs. Q1 2026SEC
Q1 2026May 15, 2026176$1.96BLASRVICRVRTvs. Q4 2025SEC
Q4 2025Feb 17, 2026162$1.58BLASRVICRPDFSvs. Q3 2025SEC
Q3 2025Nov 14, 2025161$1.43BSMCITDUPLASRvs. Q2 2025SEC
Q2 2025Aug 14, 2025150$1.25BSMCITDUPPDFSvs. Q1 2025SEC
Q1 2025May 15, 2025150$1.07BSMCIVICRPDFSvs. Q4 2024SEC
Q4 2024Feb 14, 2025150$1.30BPDFSSMCIVICRvs. Q3 2024SEC
Q3 2024Nov 14, 2024146$1.30BASPNPDFSSMCIvs. Q2 2024SEC
Q2 2024Aug 14, 2024141$1.22BSMCIASPNPDFSvs. Q1 2024SEC
Q1 2024May 15, 2024131$1.08BSMCIASPNPDFSvs. Q4 2023SEC
Q4 2023Feb 14, 2024130$792.1MSMCIASPNENTGvs. Q3 2023SEC
Q3 2023Nov 14, 2023120$588.0MSMCIVICRPDFSvs. Q2 2023SEC
Q2 2023Aug 14, 2023120$607.0MSMCIPDFSENTGvs. Q1 2023SEC
Q1 2023May 15, 2023121$579.8MPDFSSMCIENTGvs. Q4 2022SEC
Q4 2022Feb 14, 2023117$552.6MSMCIPLABPDFSvs. Q3 2022SEC
Q3 2022Nov 14, 2022118$510.4MENTGPDFSPLABvs. Q2 2022SEC
Q2 2022Aug 12, 2022121$535.0MENTGFORMTMOvs. Q1 2022SEC
Q1 2022May 16, 2022124$690.9MENTGFORMPDFSvs. Q4 2021SEC
Q4 2021Feb 14, 2022119$796.7MENTGASPNPDFSvs. Q3 2021SEC
Q3 2021Nov 15, 2021122$749.2MASPNENTGVICRvs. Q2 2021SEC
Q2 2021Aug 16, 2021121$683.9MENTGASPNPDFSvs. Q1 2021SEC
Q1 2021May 17, 2021118$732.0MENTGPLABPDFS–SEC

13D and 13G filings

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

Current stakes of 5% or more

11 companies, largest stake first.

Companies where Needham Investment Management LLC owns 5% or more
CompanyLatest formStakeChangeFirst filedLatest filingFiling
POCIPrecision Optics Corporation, Inc.13G/A15.30%1.67M shares+6.20 ppfrom 9.10%May 17, 20244 filingsMay 14, 2026SEC
ELMTElmet Group Co.13G/A8.80%2.64M shares+1.50 ppfrom 7.30%May 4, 20262 filingsAug 13, 2026SEC
TDUPThredUp Inc.13G/A8.70%9.28M shares+2.60 ppfrom 6.10%Mar 14, 20244 filingsMay 14, 2026SEC
NTICNorthern Technologies International Corp13G/A8.10%765.0K shares+1.30 ppfrom 6.80%Aug 2, 20243 filingsMay 14, 2026SEC
AIPArteris, Inc.13G/A7.80%3.33M shares–Jun 27, 20242 filingsNov 13, 2025SEC
LTRXLantronix Inc13G7.10%3.15M sharesNewJul 2, 20261 filingJul 2, 2026SEC
UISUnisys Corp13G/A6.80%4.81M shares−1.20 ppfrom 8.00%May 30, 20243 filingsFeb 13, 2026SEC
APTAlpha Pro Tech Ltd13G/A6.20%642.5K shares–May 30, 20242 filingsFeb 13, 2026SEC
ODCOil-Dri Corp of America13G/A6.10%635.0K shares–Aug 14, 20242 filingsFeb 13, 2026SEC
MTRXMatrix Service Co13G5.15%1.42M shares–Sep 13, 20242 filingsFeb 13, 2025SEC
PDFSPDF Solutions Inc13G5.10%2.02M shares+0.20 ppfrom 4.90%Nov 13, 20253 filingsMay 14, 2026SEC

Latest filings

69 filings on file made by Needham Investment Management LLC or listing it as a reporting person; the latest 20 are shown.

Schedule 13D and 13G filings by Needham Investment Management LLC
CompanyFiled (ET)FormStakeChangeEvent dateFiling
ASPNAspen Aerogels IncAug 13, 20265:36 PM ET13G/A3.90%3.26M shares−1.40 ppfrom 5.30%Below 5%Jun 30, 2026SEC
ELMTElmet Group Co.Aug 13, 20265:35 PM ET13G/A8.80%2.64M shares+1.50 ppfrom 7.30%Jun 30, 2026SEC
LTRXLantronix IncJul 2, 20265:18 PM ET13G7.10%3.15M sharesNewJun 18, 2026SEC
TDUPThredUp Inc.May 14, 20266:55 PM ET13G/A8.70%9.28M shares+2.60 ppfrom 6.10%Mar 31, 2026SEC
PDFSPDF Solutions IncMay 14, 20266:39 PM ET13G5.10%2.02M shares+0.20 ppfrom 4.90%Mar 31, 2026SEC
POCIPrecision Optics Corporation, Inc.May 14, 20266:24 PM ET13G/A15.30%1.67M shares+6.20 ppfrom 9.10%Mar 31, 2026SEC
NTICNorthern Technologies International CorpMay 14, 20266:08 PM ET13G/A8.10%765.0K shares+1.30 ppfrom 6.80%Mar 31, 2026SEC
ELMTElmet Group Co.May 4, 20267:45 PM ET13G7.30%2.21M sharesNewApr 27, 2026SEC
APTAlpha Pro Tech LtdFeb 13, 20266:11 PM ET13G/A6.20%642.5K shares–Dec 31, 2025SEC
UISUnisys CorpFeb 13, 20266:05 PM ET13G/A6.80%4.81M shares−1.20 ppfrom 8.00%Dec 31, 2025SEC
CMTLComtech Telecommunications CorpFeb 13, 20265:55 PM ET13G/A4.00%1.17M shares−2.11 ppfrom 6.11%Below 5%Dec 31, 2025SEC
ODCOil-Dri Corp of AmericaFeb 13, 20265:52 PM ET13G/A6.10%635.0K shares–Dec 31, 2025SEC
PDFSPDF Solutions IncFeb 13, 20265:48 PM ET13G/A4.90%1.97M shares−0.20 ppfrom 5.10%Below 5%Dec 31, 2025SEC
ASPNAspen Aerogels IncFeb 13, 20265:44 PM ET13G5.30%4.35M sharesNewDec 31, 2025SEC
PDFSPDF Solutions IncNov 13, 20255:48 PM ET13G5.10%2.02M sharesNewSep 30, 2025SEC
NTICNorthern Technologies International CorpNov 13, 20255:42 PM ET13G/A6.80%640.0K shares–Sep 30, 2025SEC
AIPArteris, Inc.Nov 13, 20255:36 PM ET13G/A7.80%3.33M shares–Sep 30, 2025SEC
LASRNlight, Inc.Aug 13, 20256:30 PM ET13G/A3.70%1.84M shares−1.78 ppfrom 5.48%Below 5%Jun 30, 2025SEC
TDUPThredUp Inc.Aug 13, 20256:21 PM ET13G/A6.10%5.88M shares–Jun 30, 2025SEC
KVHIKVH Industries IncAug 13, 20256:10 PM ET13G/A4.20%814.1K shares–Below 5%Jun 30, 2025SEC