CONGRESS ASSET MANAGEMENT CO

New 13F: Q3 2026

CONGRESS ASSET MANAGEMENT CO filed its 13F for the quarter ended Sep 30, 2026 on Oct 6, 2026: $5.6B in AI and semiconductor stocks; $451.1M bought and $806.2M sold against its previous quarter, at the quarter's prices.

• sold out of Kulicke & Soffa (KLIC): -$117.4M at the quarter's price
• trimmed Modine (MOD): -$116.8M at the quarter's price
• opened a position in CrowdStrike (CRWD): +$93.0M at the quarter's price
• trimmed Sterling Infrastructure (STRL): -$80.2M at the quarter's price
• added to Alphabet (GOOGL): +$78.2M at the quarter's price
• opened a position in Lumentum (LITE): +$69.1M at the quarter's price
• trimmed Credo (CRDO): -$64.2M at the quarter's price
• added to Micron (MU): +$62.8M at the quarter's price
• trimmed nVent (NVT): -$57.4M at the quarter's price
• added to Plexus (PLXS): +$55.2M at the quarter's price

CONGRESS ASSET MANAGEMENT CO declares $6.1B in 76 of the 230 AI and semiconductor companies tracked on Silicon Floor, as of Jun 30, 2026 (Form 13F): 37.4% of its $16.3B 13F portfolio. Largest positions: NVIDIA (0.01% of the company) and Apple (0.01% of the company). Over time: $6.1B in 76 of these companies for Q2 2026, against $1.8B in 43 for Q4 2019 (13F values as filed). From Mar 31, 2026 to Jun 30, 2026, it bought $920.0M and sold $989.6M of these stocks, at the quarter's prices: a net sale of $69.6M; 8 new positions and 5 sold out.

Performance of its AI picks

The AI-stock portfolio CONGRESS ASSET MANAGEMENT CO declared for Q2 2026 (Form 13F), held unchanged, returned -2.2% in Q3 2026 (SMH -7.1%), ranked 1426 of 1,785 active managers. Over the last 12 months, quarter after quarter: +22.8% (SMH +87.2%), ranked 1061 of 1,360 active managers. Over three years, quarter after quarter: +133.7% (SMH +325.8%), ranked 531 of 784 active managers. Over five years, quarter after quarter: +127.7% (SMH +389.8%), ranked 422 of 535 active managers. Trades made during a quarter are not visible in 13F filings: this measures its declared picks, not the return of its funds.

Largest positions

1. NVIDIA (NVDA): $525.8M, 2.6M shares, 0.01% of the company, 3.2% of its portfolio (added this quarter); held since Q2 2021
2. Apple (AAPL): $465.8M, 1.6M shares, 0.01% of the company, 2.9% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
3. Alphabet (GOOGL): $386.9M, 1.1M shares, 0.01% of the company, 2.4% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
4. Microsoft (MSFT): $304.1M, 815,323 shares, 0.01% of the company, 1.9% of its portfolio (added this quarter); held since Q4 2019 or earlier
5. Broadcom (AVGO): $278.9M, 738,306 shares, 0.02% of the company, 1.7% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
6. GE Vernova (GEV): $226.4M, 192,672 shares, 0.07% of the company, 1.4% of its portfolio (trimmed this quarter); held since Q4 2025
7. Amphenol (APH): $215.3M, 2.4M shares, 0.10% of the company, 1.3% of its portfolio (added this quarter); held since Q4 2019 or earlier
8. Arista Networks (ANET): $199.9M, 1.2M shares, 0.09% of the company, 1.2% of its portfolio (trimmed this quarter); held since Q2 2023
9. Sterling Infrastructure (STRL): $193.4M, 230,412 shares, 0.76% of the company, 1.2% of its portfolio (trimmed this quarter); held since Q2 2023
10. Eaton (ETN): $176.0M, 413,077 shares, 0.11% of the company, 1.1% of its portfolio (trimmed this quarter); held since Q4 2020
11. ASML (ASML): $175.6M, 88,265 shares, 0.02% of the company, 1.1% of its portfolio (added this quarter); held since Q4 2022
12. Amazon (AMZN): $174.9M, 733,843 shares, 0.01% of the company, 1.1% of its portfolio (trimmed this quarter); held since Q4 2019 or earlier
13. MongoDB (MDB): $171.7M, 511,227 shares, 0.63% of the company, 1.1% of its portfolio (added this quarter); held since Q4 2025
14. Modine (MOD): $168.0M, 629,268 shares, 1.2% of the company, 1.0% of its portfolio (trimmed this quarter); held since Q2 2023
15. nVent (NVT): $166.9M, 983,875 shares, 0.61% of the company, 1.0% of its portfolio (trimmed this quarter); held since Q3 2023

By sector

• Cloud & AI giants: $1.5B, 25% of its AI holdings, 5 companies
• Power, electrical & cooling: $1.3B, 22% of its AI holdings, 18 companies
• Chips & compute: $1.3B, 21% of its AI holdings, 10 companies
• Interconnect: $688.3M, 11% of its AI holdings, 7 companies
• Equipment & test: $649.2M, 11% of its AI holdings, 12 companies
• AI software: $398.5M, 7% of its AI holdings, 14 companies
• Servers & systems: $89.7M, 1% of its AI holdings, 4 companies
• Optics: $75.9M, 1% of its AI holdings, 2 companies
• Memory & storage: $68.7M, 1% of its AI holdings, 1 company
• Neoclouds & data centers: $33.8M, 1% of its AI holdings, 3 companies

Biggest changes this quarter

• trimmed Sterling Infrastructure (STRL): -$223.8M at the quarter's price
• opened a position in Arm Holdings (ARM): +$145.0M at the quarter's price
• opened a position in Kulicke & Soffa (KLIC): +$117.4M at the quarter's price
• trimmed Arista Networks (ANET): -$94.5M at the quarter's price
• trimmed Primoris Services (PRIM): -$80.5M at the quarter's price
• trimmed ServiceNow (NOW): -$79.1M at the quarter's price
• opened a position in Power Integrations (POWI): +$77.9M at the quarter's price
• added to Texas Instruments (TXN): +$77.7M at the quarter's price
• added to Coherent (COHR): +$74.8M at the quarter's price
• added to MongoDB (MDB): +$70.3M at the quarter's price

Other holders of this size

• Empowered Funds, LLC: $6.1B in 164 of these companies
• Vident Advisory, LLC: $6.1B in 197 of these companies
• Clal Insurance Enterprises Holdings Ltd: $6.1B in 51 of these companies
• Pathstone Holdings, LLC: $6.1B in 182 of these companies
• PINEBRIDGE INVESTMENTS LLC: $6.0B in 113 of these companies
• POLEN CAPITAL MANAGEMENT LLC: $6.1B in 50 of these companies
• &PARTNERS: $5.9B in 160 of these companies
• QRG CAPITAL MANAGEMENT, INC.: $6.1B in 141 of these companies

Follow CONGRESS ASSET MANAGEMENT CO's SEC filings (Atom feed)

All holders · Who owns each AI company · All tracked companies · The AI market