CONGRESS ASSET MANAGEMENT CO — 13F Holdings & Portfolio
CIK 897378 · latest 13F-HR filed 2026-10-06
CONGRESS ASSET MANAGEMENT CO manages $15.43B in 13F-reported U.S. long-equity assets across 406 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are NVDA (3.81%), AAPL (3.44%), GOOGL (2.75%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 51 new positions and exited 21; 121 existing positions rose in reported value and 164 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
$15.43B
Long-equity book
Holdings
406
Distinct positions
Period
2026-09-30
Filed 2026-10-06
Q/Q Activity
+51 / −21 / ↑121 / ↓164
vs 2026-06-30
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q3 26NVDA3.8% · -2%AAPL3.4% · -1%GOOGL2.8% · +21%MSFT2.7% · -2%AVGO1.9% · +11%HALO1.6% · +86%ANET1.4% · -11%LGND1.3% · -0%META1.3% · -4%RGEN1.3% · +1%V1.2% · -21%AMZN1.2% · +1%COST1.2% · -4%APH1.2% · +76%MDB1.1% · -2%UFPT1.1% · -16%ETN1.1% · -5%ASML1.1% · +2%WELL1.0% · -3%MOG.A1.0% · -1%GEV1.0% · -18%IDCC1.0% · +9%TGTX0.9% · +0%LLY0.9% · +1%PH0.9% · -4%NOVT0.9% · +1%IMAX0.9% · +0%FROG0.9% · +14%HWM0.9% · -4%NPO0.9% · -0%EAT0.8% · -2%IBKR0.8% · -2%GS0.8% · -23%MU0.8% · +99%TJX0.8% · +2%SXT0.8% · +0%ECL0.8% · -4%CVLT0.8% · -15%LIVN0.7% · 0%WMB0.7% · -4%ARM0.7% · -5%MMSI0.7% · +6%SHOP0.7% · -4%SKY0.7% · +1%HLT0.7% · -5%PJT0.7% · +1%VCEL0.7% · -12%NVT0.7% · -36%MPWR0.6% · -8%KEX0.6% · +8%FSS0.6% · +23%BOOT0.6% · +1%AUB0.6% · +1%ABCB0.6% · +1%PLTR0.6% · -1%TXN0.6% · +26%CRWD0.6% · newIDXX0.6% · -8%VCYT0.6% · newMCO0.6% · -5%
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 valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q2 26 → Q3 26Estimated 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
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 21.5%Cumulative share of the portfolio held in the largest N positions.
Firm Profile & Key People
As of the firm’s regulatory filing dated Mar 17, 2026.
Assets Under Management
$14.20B
Discretionary
$14.20B
Employees
79
Accounts
8,312
Address
2 SEAPORT LANE
BOSTON, MA 02210-2001
BOSTON, MA 02210-2001
Phone
(617) 428-4300
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| FRICANO, JAMES, A. Control | CHIEF COMPLIANCE OFFICER since Oct 2023 | Less than 5% | Individual |
| LAGAN HOLDING COMPANY TRUST Control | GENERAL PARTNER since Jan 1990 | 75% or more | Domestic Entity |
| LAGAN, CHRISTOPHER, MICHAEL Control | PRESIDENT since May 2022 | Less than 5% | Individual |
| LAGAN, DANIEL, ANTHONY Control | CHIEF EXECUTIVE OFFICER AND CHIEF INVESTMENT OFFICER since Aug 2013 | Less than 5% | Individual |
| LAGAN, MATTHEW, TERENCE Control | VICE PRESIDENT & PORTFOLIO MANAGER since Jan 2003 | Less than 5% | Individual |
| LAGAN - CONGRESS, INC. | GENERAL PARTNER since Jun 2004 | Less than 5% | Domestic Entity |
| LAGAN HOLDING COMPANY TRUST Control Indirect owner via LAGAN-CONGRESS, INC | INDIRECT OWNER since Jun 2004 | 75% or more | Domestic Entity |
| LAGAN, CHRISTOPHER, MICHAEL Control Indirect owner via LAGAN HOLDING COMPANY TRUST | TRUSTEE since Jun 2004 | 25–50% | Individual |
| LAGAN, DANIEL, ANTHONY Control Indirect owner via LAGAN HOLDING COMPANY TRUST | TRUSTEE since Jun 2004 | 50–75% | Individual |
| LAGAN, MATTHEW, TERENCE Control Indirect owner via LAGAN HOLDING COMPANY TRUST | OFFICER since Jun 2013 | General partner, trustee or manager | Individual |
Ownership & leadership changes · 10 filings with changes since Mar 9, 2012
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
Oct 24, 2023 filing
- No longer listedSCHROEDER, MICHELLE, RENEE · CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Oct 2023
- AddedFRICANO, JAMES, A. · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
Oct 4, 2023 filing
- No longer listedSWANSON, ANN MARIE · CHIEF COMPLIANCE OFFICER · Less than 5% · control person · listed since Sep 2021
- AddedSCHROEDER, MICHELLE, RENEE · CHIEF COMPLIANCE OFFICER · Less than 5%
Mar 24, 2023 filing
- ChangedLAGAN, CHRISTOPHER, MICHAEL · title MANAGING DIRECTOR → PRESIDENT
- ChangedLAGAN, DANIEL, ANTHONY · title PRESIDENT → CHIEF EXECUTIVE OFFICER AND CHIEF INVESTMENT OFFICER
Sep 3, 2021 filing
- No longer listedWOFFORD, FRED · CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Dec 2014
- AddedSWANSON, ANN MARIE · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
Mar 18, 2016 filing
- ChangedLAGAN, CHRISTOPHER, MICHAEL · indirect via LAGAN HOLDING COMPANY TRUST: title OFFICER → TRUSTEE
- ChangedLAGAN, DANIEL, ANTHONY · indirect via LAGAN HOLDING COMPANY TRUST: title OFFICER → TRUSTEE
Mar 9, 2016 filing
- ChangedLAGAN, MATTHEW, TERENCE · title VICE PRESIDENT - SENIOR RESEARCH ANALYST & PORTFOLIO MANAGER → VICE PRESIDENT & PORTFOLIO MANAGER; now a control person
- ChangedWOFFORD, FRED · no longer a control person
Mar 24, 2015 filing
- No longer listedLAGAN HOLDING COMPANY · GENERAL PARTNER · 75% or more · control person · listed since Jan 1990
- No longer listedLAGAN HOLDING COMPANY · INDIRECT OWNER · 75% or more · indirect via LAGAN-CONGRESS, INC · control person · listed since Jun 2004
- No longer listedWARD, LAWRENCE, ASA · EXECUTIVE VICE PRESIDENT · Less than 5% · listed since Jan 2003
- AddedLAGAN HOLDING COMPANY TRUST · GENERAL PARTNER · 75% or more · control person
- AddedLAGAN HOLDING COMPANY TRUST · INDIRECT OWNER · 75% or more · indirect via LAGAN-CONGRESS, INC · control person
- AddedLAGAN, CHRISTOPHER, MICHAEL · OFFICER · 25–50% · indirect via LAGAN HOLDING COMPANY TRUST · control person
- AddedLAGAN, DANIEL, ANTHONY · OFFICER · 50–75% · indirect via LAGAN HOLDING COMPANY TRUST · control person
- AddedLAGAN, MATTHEW, TERENCE · OFFICER · General partner, trustee or manager · indirect via LAGAN HOLDING COMPANY TRUST · control person
- ChangedLAGAN, CHRISTOPHER, MICHAEL · now a control person
- ChangedLAGAN, DANIEL, ANTHONY · now a control person
Dec 18, 2014 filing
- No longer listedLAGAN (ESTATE), ALFRED, ALPHONSUS · CHAIRMAN · Less than 5% · control person · listed since Jan 1985
- No longer listedLAGAN (ESTATE), ALFRED, ALPHONSUS · INDIRECT OWNER · 25–50% · indirect via LAGAN HOLDING COMPANY · control person · listed since Jan 1985
- No longer listedLAGAN (ESTATE), ALFRED, ALPHONSUS · INDIRECT OWNER · 25–50% · indirect via LAGAN - CONGRESS, INC. · control person · listed since Jun 2004
- AddedLAGAN HOLDING COMPANY · INDIRECT OWNER · 75% or more · indirect via LAGAN-CONGRESS, INC · control person
- ChangedWARD, LAWRENCE, ASA · title EXECUTIVE VICE PRESIDENT, CHIEF COMPLIANCE OFFICER → EXECUTIVE VICE PRESIDENT
- ChangedWOFFORD, FRED · title COMPLIANCE OFFICER → CHIEF COMPLIANCE OFFICER
Sep 12, 2014 filing
- AddedWOFFORD, FRED · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
- ChangedWARD, LAWRENCE, ASA · title CHIEF COMPLIANCE OFFICER → EXECUTIVE VICE PRESIDENT
- ChangedWARD, LAWRENCE, ASA · title EXECUTIVE VICE PRESIDENT → EXECUTIVE VICE PRESIDENT, CHIEF COMPLIANCE OFFICER
- ChangedWOFFORD, FRED · title CHIEF COMPLIANCE OFFICER → COMPLIANCE OFFICER
Mar 5, 2014 filing
- ChangedLAGAN, CHRISTOPHER, MICHAEL · title SENIOR VICE PRESIDENT → MANAGING DIRECTOR
- ChangedLAGAN, MATTHEW, TERENCE · title SENIOR RESEARCH ANALYST → VICE PRESIDENT - SENIOR RESEARCH ANALYST & PORTFOLIO MANAGER
Older changes (1 more filing)
Mar 9, 2012 filing (earliest on record)
- ListedLAGAN (ESTATE), ALFRED, ALPHONSUS · CHAIRMAN · Less than 5% · control person
- ListedLAGAN (ESTATE), ALFRED, ALPHONSUS · INDIRECT OWNER · 25–50% · indirect via LAGAN HOLDING COMPANY · control person
- ListedLAGAN (ESTATE), ALFRED, ALPHONSUS · INDIRECT OWNER · 25–50% · indirect via LAGAN - CONGRESS, INC. · control person
- ListedLAGAN - CONGRESS, INC. · GENERAL PARTNER · Less than 5%
- ListedLAGAN HOLDING COMPANY · GENERAL PARTNER · 75% or more · control person
- ListedLAGAN, CHRISTOPHER, MICHAEL · SENIOR VICE PRESIDENT · Less than 5%
- ListedLAGAN, DANIEL, ANTHONY · PRESIDENT · Less than 5%
- ListedLAGAN, MATTHEW, TERENCE · SENIOR RESEARCH ANALYST · Less than 5%
- ListedWARD, LAWRENCE, ASA · CHIEF COMPLIANCE OFFICER · Less than 5%
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- Halozyme Therapeutics Inc$155.7M +161.8%
- Microsoft Corp.$106.8M +35.1%
- Tesla Inc$72.5M +11020.7%
- Apple Inc.$65.1M +14.0%
- NVIDIA Corp.$61.4M +11.7%
Top Trims
- Modine Manufacturing Co.-$167.0M -99.4%
- Sterling Infrastructure Inc-$160.3M -82.9%
- TKO Group Holdings Inc.-$113.3M -79.7%
- O'Reilly Automotive Inc.-$112.2M -82.9%
- Intuitive Surgical Inc.-$106.2M -88.8%
New Positions
- Crowdstrike Holdings Inc$93.0M
- Veracyte Inc$90.0M
- Clear Secure Inc$78.8M
- Medtronic PLC$76.2M
- Lumentum Holdings Inc.$69.1M
Exited Positions
- Universal Technical Institute, Inc.$128.3M
- Kulicke and Soffa Industries, Inc.$117.4M
- Alnylam Pharmaceuticals Inc.$80.0M
- D.R. Horton, Inc.$37.8M
- Celsius Holdings Inc.$13.9M
CONGRESS ASSET MANAGEMENT CO Holdings (2026-09-30)
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 | NVIDIA Corp. | NVDA | 67066G104 | $587.3M | 3.81% | 2,571,429 | SH |
| 2 | Apple Inc. | AAPL | 037833100 | $530.9M | 3.44% | 1,594,177 | SH |
| 3 | Alphabet Inc. | GOOGL | 02079K305 | $425.0M | 2.75% | 1,235,195 | SH |
| 4 | Microsoft Corp. | MSFT | 594918104 | $411.0M | 2.66% | 801,234 | SH |
| 5 | Broadcom Inc | AVGO | 11135F101 | $288.3M | 1.87% | 821,013 | SH |
| 6 | Halozyme Therapeutics Inc | HALO | 40637H109 | $251.9M | 1.63% | 2,281,615 | SH |
| 7 | Arista Networks Inc | ANET | 040413205 | $213.7M | 1.38% | 1,049,467 | SH |
| 8 | Ligand Pharmaceuticals Incorporated | LGND | 53220K504 | $205.7M | 1.33% | 658,556 | SH |
| 9 | Meta Platforms Inc | META | 30303M102 | $203.7M | 1.32% | 280,895 | SH |
| 10 | Repligen Corporation | RGEN | 759916109 | $196.2M | 1.27% | 1,020,907 | SH |
| 11 | Visa Inc | V | 92826C839 | $187.6M | 1.22% | 522,219 | SH |
| 12 | Amazon.com, Inc. | AMZN | 023135106 | $184.6M | 1.20% | 741,049 | SH |
| 13 | Costco Wholesale Corporation | COST | 22160K105 | $183.0M | 1.19% | 201,044 | SH |
| 14 | Amphenol Corporation | APH | 032095101 | $181.0M | 1.17% | 2,147,483 | SH |
| 15 | MongoDB Inc. | MDB | 60937P106 | $175.1M | 1.13% | 502,346 | SH |
| 16 | UFP Technologies Inc. | UFPT | 902673102 | $171.8M | 1.11% | 578,770 | SH |
| 17 | Eaton Corporation PLC | ETN | G29183103 | $169.3M | 1.10% | 393,986 | SH |
| 18 | ASML Holding N.V. | ASML | N07059210 | $162.2M | 1.05% | 89,548 | SH |
| 19 | Welltower Inc. | WELL | 95040Q104 | $160.4M | 1.04% | 696,783 | SH |
| 20 | Moog Inc. | MOG.A | 615394202 | $154.0M | 1.00% | 403,781 | SH |
| 21 | GE Vernova Inc. | GEV | 36828A101 | $150.5M | 0.98% | 158,328 | SH |
| 22 | InterDigital, Inc. | IDCC | 45867G101 | $149.4M | 0.97% | 458,053 | SH |
| 23 | TG Therapeutics Inc | TGTX | 88322Q108 | $145.4M | 0.94% | 2,606,516 | SH |
| 24 | Eli Lilly & Co. | LLY | 532457108 | $144.1M | 0.93% | 124,514 | SH |
| 25 | Parker-Hannifin Corp. | PH | 701094104 | $139.6M | 0.90% | 146,145 | SH |
| 26 | Novanta Inc | NOVT | 67000B104 | $139.3M | 0.90% | 979,842 | SH |
| 27 | IMAX Corporation | IMAX | 45245E109 | $139.3M | 0.90% | 2,541,756 | SH |
| 28 | JFrog Ltd | FROG | M6191J100 | $137.8M | 0.89% | 1,420,301 | SH |
| 29 | Howmet Aerospace Inc | HWM | 443201108 | $134.9M | 0.87% | 596,554 | SH |
| 30 | Enpro Inc | NPO | 29355X107 | $132.0M | 0.86% | 430,984 | SH |
| 31 | Brinker International, Inc. | EAT | 109641100 | $130.0M | 0.84% | 671,777 | SH |
| 32 | Interactive Brokers Group Inc | IBKR | 45841N107 | $128.3M | 0.83% | 1,502,435 | SH |
| 33 | Goldman Sachs Group, Inc. | GS | 38141G104 | $126.7M | 0.82% | 140,701 | SH |
| 34 | Micron Technology Inc. | MU | 595112103 | $126.2M | 0.82% | 118,460 | SH |
| 35 | The TJX Companies Inc. | TJX | 872540109 | $124.8M | 0.81% | 943,136 | SH |
| 36 | Sensient Technologies Corp | SXT | 81725T100 | $121.8M | 0.79% | 932,079 | SH |
| 37 | Ecolab Inc. | ECL | 278865100 | $119.4M | 0.77% | 434,723 | SH |
| 38 | Commvault Systems Inc. | CVLT | 204166102 | $117.5M | 0.76% | 783,667 | SH |
| 39 | LivaNova PLC | LIVN | G5509L101 | $115.0M | 0.75% | 1,502,802 | SH |
| 40 | Williams Companies Inc. (The) | WMB | 969457100 | $114.1M | 0.74% | 1,678,477 | SH |
| 41 | Arm Holdings PLC | ARM | 042068205 | $112.7M | 0.73% | 389,126 | SH |
| 42 | Merit Medical Systems Inc. | MMSI | 589889104 | $108.7M | 0.70% | 1,260,675 | SH |
| 43 | Shopify Inc | SHOP | 82509L107 | $108.4M | 0.70% | 730,843 | SH |
| 44 | Champion Homes Inc. | SKY | 830830105 | $104.8M | 0.68% | 1,222,557 | SH |
| 45 | Hilton Worldwide Holdings Inc | HLT | 43300A203 | $104.6M | 0.68% | 328,708 | SH |
| 46 | PJT Partners Inc. | PJT | 69343T107 | $104.0M | 0.67% | 728,580 | SH |
| 47 | Vericel Corporation | VCEL | 92346J108 | $102.4M | 0.66% | 2,552,066 | SH |
| 48 | NVent Electric PLC | NVT | G6700G107 | $100.4M | 0.65% | 626,243 | SH |
| 49 | Monolithic Power Systems Inc. | MPWR | 609839105 | $100.2M | 0.65% | 74,381 | SH |
| 50 | Kirby Corp | KEX | 497266106 | $99.9M | 0.65% | 761,099 | SH |
Filing History
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-09-30 | 2026-10-06 | $15.43B | 406 | 0000897378-26-000015 |
| 2026-06-30 | 2026-07-07 | $16.25B | 376 | 0000897378-26-000010 |
| 2026-03-31 | 2026-04-14 | $13.95B | 417 | 0000897378-26-000005 |
| 2025-12-31 | 2026-01-09 | $14.21B | 381 | 0000897378-26-000002 |
Filer Information
Address
2 SEAPORT LN5TH FLOOR
BOSTON, MA 02210
Phone
(617) 737-1566
Filing Manager
CONGRESS ASSET MANAGEMENT CO
BOSTON, MA
Signatory
Athena Konstantinidis
Compliance Associate