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Livermore
Livermore
ZHEN

Advisory Research Inc

SEC CIK
0000902584
Latest filing
Aug 13, 2026

The latest 13F from Advisory Research Inc covers Q2 2026 (filed Aug 13, 2026): 136 long positions worth $1.00B. The top 10 holdings make up 41.4% of the portfolio, and the largest is Myers Industries Inc (MYE) at 6.5%. 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
3
Est. +$5.05M
Added
76
Est. +$68.2M
Reduced
47
Est. −$15.6M
Sold out
4
Est. −$11.9M

Top 5 holdings

Share of this quarter's portfolio value

  1. MYEMyers Industries Inc
    6.5%$65.6MHistory
  2. OPLNOPENLANE, Inc.
    6.3%$63.2MHistory
  3. TRSTrimas Corp
    5.4%$54.6MHistory
  4. TSMTaiwan Semiconductor Manufacturing Co Ltd
    4.0%$40.3MHistory
  5. BELFBBel Fuse Inc
    3.9%$39.3MHistory

Share of portfolio

Top 5 holdings and the other 131 positions, by share of portfolio value

  1. MYE6.5%
  2. OPLN6.3%
  3. TRS5.4%
  4. TSM4.0%
  5. BELFB3.9%
  6. Other 131 positions73.8%

Biggest buys

New and added positions, by estimated amount bought

  1. MYEMyers Industries Inc
    +$11.7MAddedHistory
  2. OPLNOPENLANE, Inc.
    +$10.4MAddedHistory
  3. LTMLatam Airlines Group S.A.
    +$10.2MAddedHistory
  4. JBTMJBT Marel Corp
    +$7.12MAddedHistory
  5. MFPMidera Food Processing, Inc.
    +$4.43MNewHistory

Largest weight increases

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

  1. MYEMyers Industries Inc
    +2.57 pp4.0% → 6.5%History
  2. OPLNOPENLANE, Inc.
    +1.72 pp4.6% → 6.3%History
  3. LTMLatam Airlines Group S.A.
    +0.99 pp0.6% → 1.6%History
  4. TSMTaiwan Semiconductor Manufacturing Co Ltd
    +0.63 pp3.4% → 4.0%History
  5. JBTMJBT Marel Corp
    +0.53 pp2.2% → 2.7%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. EEXEmerald Holding, Inc.
    −$8.42MSold outHistory
  2. ACVAACV Auctions Inc.
    −$3.71MReducedHistory
  3. APAAPA Corp
    −$3.65MReducedHistory
  4. MTDRMatador Resources Co
    −$2.88MReducedHistory
  5. PHINPhinia Inc.
    −$2.55MSold outHistory

Largest weight decreases

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

  1. APAAPA Corp
    −1.10 pp1.9% → 0.8%History
  2. EEXEmerald Holding, Inc.
    −1.04 pp1.0% → 0.0%History
  3. MTDRMatador Resources Co
    −0.97 pp1.9% → 0.9%History
  4. PHINPhinia Inc.
    −0.31 pp0.3% → 0.0%History
  5. WBSWebster Financial Corp
    −0.17 pp0.3% → 0.1%History

Metrics

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

Portfolio value
$1.00B
+$188.9M (+23.2%) vs. prior quarter
Positions
136
−1 vs. prior quarter
Top 10 concentration
41.4%
Top 10 as share of value
Turnover
3.0%
Q2 2026, one quarter
Average holding period
11.8 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 $1.56B (Q3 2021)

Q1 2021: $1.42BQ2 2021: $1.52BQ3 2021: $1.56BQ4 2021: $1.27BQ1 2022: $1.25BQ2 2022: $1.02BQ3 2022: $1.02BQ4 2022: $1.06BQ1 2023: $608.5MQ2 2023: $779.8MQ3 2023: $720.2MQ4 2023: $648.3MQ1 2024: $502.9MQ2 2024: $531.6MQ3 2024: $562.9MQ4 2024: $601.7MQ1 2025: $567.3MQ2 2025: $650.9MQ3 2025: $761.4MQ4 2025: $795.7MQ1 2026: $813.5MQ2 2026: $1.00B
Q1 2021Q2 2026
13F filings of Advisory Research Inc by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 13, 2026136$1.00BMYEOPLNTRSvs. Q1 2026SEC
Q1 2026May 14, 2026137$813.5MTRSOPLNMYEvs. Q4 2025SEC
Q4 2025Feb 13, 2026143$795.7MTRSOPLNTSMvs. Q3 2025SEC
Q3 2025Nov 13, 2025149$761.4MTSMOPLNTRSvs. Q2 2025SEC
Q2 2025Aug 13, 2025142$650.9MBELFBTRSPMvs. Q1 2025SEC
Q1 2025May 14, 2025148$567.3MBELFBJBTMTRSvs. Q4 2024SEC
Q4 2024Feb 13, 2025152$601.7MBELFBJBTMAVGOvs. Q3 2024SEC
Q3 2024Nov 14, 2024156$562.9MMLRBELFBPHINvs. Q2 2024SEC
Q2 2024Aug 13, 2024160$531.6MMLRMSFTESGRvs. Q1 2024SEC
Q1 2024May 14, 2024157$502.9MMSFTMLRESGRvs. Q4 2023SEC
Q4 2023Feb 13, 2024331$648.3MMSFTESGRMLRvs. Q3 2023SEC
Q3 2023Nov 13, 2023424$720.2MMSFTMLRESGRvs. Q2 2023SEC
Q2 2023Aug 14, 2023436$779.8MMSFTRSAAPLvs. Q1 2023SEC
Q1 2023May 12, 2023348$608.5MMSFTRSPFGCvs. Q4 2022SEC
Q4 2022Feb 13, 2023364$1.06BFANGOVVEnerplus Corpvs. Q3 2022SEC
Q3 2022Nov 15, 2022354$1.02BDENSMOVVvs. Q2 2022SEC
Q2 2022Aug 17, 2022Amended370$1.02BDENSMOVVvs. Q1 2022SEC
Q1 2022May 16, 2022400$1.25BDENSMARvs. Q4 2021SEC
Q4 2021Feb 11, 2022351$1.27BDENEQTSMvs. Q3 2021SEC
Q3 2021Nov 12, 2021355$1.56BDENEQTDVNvs. Q2 2021SEC
Q2 2021Aug 16, 2021353$1.52BDENFANGDVNvs. Q1 2021SEC
Q1 2021May 12, 2021338$1.42BFANGDENDVN–SEC

13D and 13G filings

Companies where Advisory Research Inc reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

Advisory Research Inc does not currently report owning 5% or more of any company.

Latest filings

3 filings on file made by Advisory Research Inc or listing it as a reporting person, newest first.

Schedule 13D and 13G filings by Advisory Research Inc
CompanyFiled (ET)FormStakeChangeEvent dateFiling
EPSNEpsilon Energy Ltd.Feb 7, 202313G/AOld format–––SEC
EPSNEpsilon Energy Ltd.Feb 7, 202213G/AOld format–––SEC
EPSNEpsilon Energy Ltd.Feb 16, 202113G/AOld format–––SEC