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EMERALD ADVISERS, LLC — 13F Holdings & Portfolio

CIK 1015083 · latest 13F-HR filed 2026-08-05

Backtest portfolio

EMERALD ADVISERS, LLC manages $4.25B in 13F-reported U.S. long-equity assets across 237 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are TVTX (2.14%), CDNL (1.88%), MRCY (1.84%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 28 new positions and exited 39; 135 existing positions rose in reported value and 56 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

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AUM
$4.25B

Long-equity book

Holdings
237

Distinct positions

Period
2026-06-30

Filed 2026-08-05

Q/Q Activity
+28 / −39 / ↑135 / ↓56

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
TVTX2.1% · +3%CDNL1.9% · +47%MRCY1.8% · +7%AIR1.8% · +17%VSEC1.7% · +3%KLIC1.7% · -3%AGX1.7% · -6%CECO1.6% · +41%CORT1.5% · +264%LIVN1.5% · +17%SMTC1.5% · -14%IDCC1.5% · +115%ESE1.5% · +10%ACLS1.5% · +243%PDFS1.5% · +3%PLXS1.5% · +25%COHU1.5% · +8%COGT1.5% · +1%ALGT1.3% · +41%LGN1.3% · newMIRM1.3% · +18%GH1.3% · -57%MOD1.3% · -46%AX1.2% · +8%SEI1.2% · +8%LASR1.2% · -1%SYRE1.2% · -8%ATRO1.2% · +38%UMBF1.2% · +29%BOOT1.2% · +44%RSI1.1% · +4%SXT1.1% · newBLLN1.1% · +57%AGYS1.1% · +32%TTMI1.0% · -70%COMP1.0% · +24%FRPT0.9% · +40%LTH0.9% · +48%FA0.9% · +91%TEX0.9% · newCYTK0.9% · +130%IPGP0.9% · +7%EYE0.9% · +34%DIOD0.9% · +91%HRI0.9% · newSYNA0.9% · -10%MXL0.8% · newMANE0.8% · +118%VRNS0.8% · -3%PVLA0.8% · +42%TTI0.8% · +16%AMSC0.8% · +11%MC0.8% · -3%KTOS0.8% · -17%OLLI0.8% · +28%RMBS0.8% · -49%TRVI0.8% · -2%ONTO0.8% · -26%IMAX0.8% · -2%TMDX0.8% · +43%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

3 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 17.4%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People
Assets Under Management
$3.30B
Discretionary
$3.30B
Employees
35
Accounts
43
Address
3175 OREGON PIKE
LEOLA, PA 17540
Phone
(717) 396-1116
Website
Mailing Address
P. O. BOX 10666, LANCASTER, PA, 17540
Name Title / Status Ownership Type
1251 CAPITAL GROUP HOLDINGS, LLC ControlSHAREHOLDERGeneral partnerDomestic Entity
1251 CAPITAL GROUP, INC. ControlMANAGING MEMBER75% or moreDomestic Entity
1251 FINANCING COMPANY, LLC ControlMEMBER75% or moreDomestic Entity
BRIZIUS, CHARLES, ALBERT ControlMEMBER/MANAGERGeneral partnerIndividual
DIFFRACTIVE MANAGERS GROUP PAYCO, LLC ControlMEMBER75% or moreDomestic Entity
EMERALD ASSET MANAGEMENT EMPLOYEE STOCK OWNERSHIP TRUST ControlMEMBER75% or moreDomestic Entity
EMERALD ASSET MANAGEMENT PA, LLC ControlDIRECT OWNER75% or moreDomestic Entity
EMERALD ASSET MANAGEMENT, INC. ControlMEMBER25–50%Domestic Entity
F/M MANAGERS GROUP, LLC ControlMEMBER50–75%Domestic Entity
HAILER, JOHN, THOMAS ControlMEMBER/MANAGER50–75%Individual
MERTZ, KENNETH, GEORGE ControlCHIEF EXECUTIVE OFFICER, PRESIDENT AND DIRECTORLess than 5%Individual
MOYER, DANIEL, WEBSTER ControlEXECUTIVE VICE PRESIDENTLess than 5%Individual
MOYER, DANIEL, WEBSTER ControlTRUSTEEGeneral partnerIndividual
Maguire, Christopher ControlMEMBERGeneral partnerIndividual
REHR, SCOTT, LAMBERT ControlTRUSTEEGeneral partnerIndividual
SEARS, STACEY, LYNN ControlSENIOR VICE PRESIDENT AND DIRECTORLess than 5%Individual
WARE, PAUL, WILLARD ControlTRUSTEEGeneral partnerIndividual
Wilson, Michael, Arthur Ross ControlMEMBERGeneral partnerIndividual
MEEHAN, JAMES, ANDREWCHIEF COMPLIANCE OFFICERLess than 5%Individual

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

EMERALD ADVISERS, LLC Holdings (2026-06-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 TRAVERE THERAPEUTICS INC TVTX 89422G107 $90.9M 2.14% 1,600,886 SH
2 CARDINAL INFRASTRUCTURE GROUP CDNL 14154A102 $79.9M 1.88% 847,969 SH
3 MERCURY SYSTEMS INC MRCY 589378108 $78.1M 1.84% 638,682 SH
4 AAR CORPORATION AIR 000361105 $74.6M 1.76% 521,919 SH
5 VSE CORPORATION VSEC 918284100 $73.8M 1.74% 323,152 SH
6 KULICKE AND SOFFA INDUSTRIES KLIC 501242101 $73.8M 1.74% 551,535 SH
7 ARGAN INC AGX 04010E109 $71.3M 1.68% 89,296 SH
8 CECO ENVIRONMENTAL CORP CECO 125141101 $66.9M 1.57% 736,784 SH
9 CORCEPT THERAPEUTICS INC CORT 218352102 $65.1M 1.53% 748,325 SH
10 LIVANOVA PLC LIVN G5509L101 $64.7M 1.52% 787,101 SH
11 SEMTECH CORP SMTC 816850101 $63.6M 1.50% 393,030 SH
12 INTERDIGITAL INC PA COM IDCC 45867G101 $63.3M 1.49% 223,517 SH
13 ESCO TECHNOLOGIES INC ESE 296315104 $62.9M 1.48% 179,798 SH
14 AXCELIS TECHNOLOGIES INC ACLS 054540208 $62.6M 1.47% 330,469 SH
15 PDF SOLUTIONS INC PDFS 693282105 $62.6M 1.47% 884,294 SH
16 PLEXUS CORP PLXS 729132100 $62.5M 1.47% 207,712 SH
17 COHU INC COHU 192576106 $62.4M 1.47% 843,627 SH
18 COGENT BIOSCIENCES INC COGT 19240Q201 $62.0M 1.46% 1,603,319 SH
19 ALLEGIANT TRAVEL CO ALGT 01748X102 $55.9M 1.32% 475,112 SH
20 LEGENCE CORP LGN 52476L109 $55.7M 1.31% 653,788 SH
21 MIRUM PHARMACEUTICALS INC MIRM 604749101 $54.8M 1.29% 468,295 SH
22 GUARDANT HEALTH INC GH 40131M109 $54.6M 1.29% 364,022 SH
23 MODINE MANUFACTURING CO MOD 607828100 $54.1M 1.27% 202,754 SH
24 AXOS FINANCIAL INC AX 05465C100 $52.2M 1.23% 536,162 SH
25 SOLARIS ENERGY INFRASTRUCTURE INC SEI 83418M103 $51.5M 1.21% 640,616 SH
26 NLIGHT INC LASR 65487K100 $51.3M 1.21% 736,848 SH
27 SPYRE THERAPEUTICS SYRE 00773J202 $50.4M 1.19% 567,430 SH
28 UMB FINANCIAL CORP UMBF 902788108 $49.4M 1.16% 345,687 SH
29 BOOT BARN HOLDINGS INC BOOT 099406100 $49.3M 1.16% 300,226 SH
30 RUSH STREET INTERACTIVE INC RSI 782011100 $48.8M 1.15% 1,639,592 SH
31 SENSIENT TECHNOLOGIES CORP SXT 81725T100 $48.7M 1.15% 394,927 SH
32 BILLIONTOONE INC BLLN 090168105 $45.1M 1.06% 375,858 SH
33 AGILYSYS INC AGYS 00847J105 $44.7M 1.05% 427,845 SH
34 ASTRONICS CORP ATRO 046433108 $41.8M 0.98% 513,984 SH
35 TTM TECHNOLOGIES INC TTMI 87305R109 $41.4M 0.98% 221,627 SH
36 COMPASS INC COMP 20464U100 $40.6M 0.96% 3,296,616 SH
37 FRESHPET INC FRPT 358039105 $39.8M 0.94% 673,730 SH
38 LIFETIME GROUP HOLDINGS INC LTH 53190C102 $39.7M 0.93% 971,490 SH
39 FIRST ADVANTAGE CORP FA 31846B108 $39.5M 0.93% 2,188,875 SH
40 TEREX CORP NEW TEX 880779103 $39.5M 0.93% 545,046 SH
41 CYTOKENETICS INC CYTK 23282W605 $39.0M 0.92% 457,956 SH
42 IPG PHOTONICS CORP IPGP 44980X109 $38.3M 0.90% 326,701 SH
43 NATIONAL VISION HOLDINGS EYE 63845R107 $38.1M 0.90% 2,006,691 SH
44 DIODES INCORPORATED DIOD 254543101 $37.8M 0.89% 345,473 SH
45 HERC HOLDINGS INC HRI 42704L104 $37.4M 0.88% 261,155 SH
46 SYNAPTICS INC SYNA 87157D109 $37.1M 0.87% 298,552 SH
47 MAXLINEAR INC CLASS A MXL 57776J100 $35.9M 0.84% 280,350 SH
48 VERADERMICS INC MANE 922967104 $35.5M 0.83% 288,370 SH
49 VARONIS SYSTEMS INC VRNS 922280102 $35.3M 0.83% 841,193 SH
50 PALVELLA THERAPEUTICS INC PVLA 697947109 $35.1M 0.83% 229,486 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-05 $4.25B 237 0001104659-26-090959
2026-03-31 2026-05-04 $3.16B 248 0001104659-26-054901
2025-12-31 2026-02-09 $3.25B 246 0001104659-26-011928
Filer Information
Address
3175 OREGON PIKE
LEOLA, PA 17540
Phone
(717) 556-8900
Filing Manager
EMERALD ADVISERS, LLC
LEOLA, PA
Signatory
Kenneth G. Mertz II
President