| $1–2 million | SCIENCE INTERACTIVE GROUP LLC | YULEE, FL | Byline Bank |
| $150,000–350,000 | SCORPION GRAPHICS, INC. | CHICAGO, IL | Byline Bank |
| $1–2 million | SCOTT BYRON & COMPANY INC. | Lake Bluff, IL | Byline Bank |
| $350,000–1 million | SCOTT'S SEAFOOD ROUNDHOUSE | Folsom, CA | Byline Bank |
| $150,000–350,000 | SCOTT'S SEAFOOD ROUNDHOUSE | SACRAMENTO, CA | Byline Bank |
| $150,000–350,000 | SDS DINING CORP. DBA SAPPHIRE CUISINES OF INDIA | New York, NY | Byline Bank |
| $150,000–350,000 | SDS DINING CORP. DBA SAPPHIRE, CUISINES OF INDIA | New York, NY | Byline Bank |
| $150,000–350,000 | SEAL OF EXCELLENCE ACADEMY LLC | Bolingbrook, IL | Byline Bank |
| $150,000–350,000 | SEAL OF EXCELLENCE ACADEMY LLC | BOLINGBROOK, IL | Byline Bank |
| $350,000–1 million | SEED HOSPITALITY, LLC | NASHVILLE, TN | Byline Bank |
| $150,000–350,000 | SEM INITIATIVES LLC | SUSSEX, WI | Byline Bank |
| $150,000–350,000 | SEM INITIATIVES LLC | Sussex, WI | Byline Bank |
| $350,000–1 million | SERENITY HOME HEALTH CARE SERVICES, LLC | COLUMBUS, OH | Byline Bank |
| $1–2 million | SHAKOU LLC | Libertyville, IL | Byline Bank |
| $1–2 million | SHAKOU LLC | LIBERTYVILLE, IL | Byline Bank |
| $150,000–350,000 | SHAKOU NAPERVILLE LLC | LIBERTYVILLE, IL | Byline Bank |
| $350,000–1 million | SHEET METAL SUPPLY LTD. | Grayslake, IL | Byline Bank |
| $350,000–1 million | SHEET METAL SUPPLY, LTD. | GRAYSLAKE, IL | Byline Bank |
| $350,000–1 million | SHEFFIELD'S BEER & WINE GARDEN INC. | Chicago, IL | Byline Bank |
| $150,000–350,000 | SHEFFIELD'S BEER & WINE GARDEN INC. | Chicago, IL | Byline Bank |
| $1–2 million | SHIELDS BUSINESS SOLUTIONS, INC. | MOORESTOWN, NJ | Byline Bank |
| $350,000–1 million | SHORE COMMUNITY SERVICES INC | Skokie, IL | Byline Bank |
| $350,000–1 million | SHORE COMMUNITY SERVICES, INC | Skokie, IL | Byline Bank |
| $350,000–1 million | SHUR-WAY MOVING & CARTAGE CO | Libertyville, IL | Byline Bank |
| $150,000–350,000 | SID KAMP TRUCKING, INC. | MOKENA, IL | Byline Bank |
| $150,000–350,000 | SILK SCREEN EXPRESS INC. | Tinley Park, IL | Byline Bank |
| $350,000–1 million | SILLIMAN GROUP, LLC | Englewood, NJ | Byline Bank |
| $350,000–1 million | SILVER LAKE AUTO & TIRE CENTERS, LLC | OCONOMOWOC, WI | Byline Bank |
| $150,000–350,000 | SILVER-LAND INC. | Forest Park, IL | Byline Bank |
| $150,000–350,000 | SINGER SAFETY COMPANY | Chicago, IL | Byline Bank |
| $1–2 million | SINY CORP | JANESVILLE, WI | Byline Bank |
| $350,000–1 million | SLEVIN AUTOMOTIVE GROUP LLC | CATHEDRAL CITY, CA | Byline Bank |
| $350,000–1 million | SLOAN INDUSTRIES INC | Wood Dale, IL | Byline Bank |
| $350,000–1 million | SLOAN INDUSTRIES INC | Wood Dale, IL | Byline Bank |
| $150,000–350,000 | SMALL WORLD LEARNING CENTER INC. | Franklin Park, IL | Byline Bank |
| $150,000–350,000 | SMALL WORLD LEARNING CENTER, INC. | Franklin Park, IL | Byline Bank |
| $150,000–350,000 | SML LLC | Roselle, IL | Byline Bank |
| $150,000–350,000 | SML, LLC | ROSELLE, IL | Byline Bank |
| $350,000–1 million | SMP HOLDINGS LLC | Glenview, IL | Byline Bank |
| $350,000–1 million | SMP HOLDINGS LLC | Glenview, IL | Byline Bank |
| $150,000–350,000 | SNELLVILLE URBAN AIR LLC | Tomball,, TX | Byline Bank |
| $350,000–1 million | SOCIOS HOLDINGS INC | Detroit, MI | Byline Bank |
| $150,000–350,000 | SOCIOS HOLDINGS, INC | DETROIT, MI | Byline Bank |
| $1–2 million | SOLIANT CONSULTING INC | Chicago, IL | Byline Bank |
| $350,000–1 million | SOLUTIONS SERVICE SYSTEMS, INC. | Burr Ridge, IL | Byline Bank |
| $350,000–1 million | SOUND BUILDING SUPPLY INC | RENTON, WA | Byline Bank |
| $2–5 million | SOURCE ONE STAFFING INC | WEST CHICAGO, IL | Byline Bank |
| $150,000–350,000 | SOUTH LOOP CLUB INC. | Chicago, IL | Byline Bank |
| $350,000–1 million | SOUTHEASTERN MECHANICAL, INC. | Union Grove, WI | Byline Bank |
| $150,000–350,000 | SOUTHERN BELLES BARRINGTON LLC | Barrington, IL | Byline Bank |
| $150,000–350,000 | SOUTHERN CAFE ROSELLE, INC. | Roselle, IL | Byline Bank |
| $350,000–1 million | SOUTHPORT GRILL LLC | Chicago, IL | Byline Bank |
| $350,000–1 million | SOUTHPORT GRILL, LLC | CHICAGO, IL | Byline Bank |
| $150,000–350,000 | SOUTHPORT SALON CONCEPTS LLC | Chicago, IL | Byline Bank |
| $150,000–350,000 | SOUTHPORT SALON CONCEPTS, LLC | CHICAGO, IL | Byline Bank |
| $350,000–1 million | SPADERMA INC. | Chicago, IL | Byline Bank |
| $350,000–1 million | SPADERMA INC. | Chicago, IL | Byline Bank |
| $150,000–350,000 | SPADERMA WEST LOOP, INC. | Chicago, IL | Byline Bank |
| $150,000–350,000 | SPADERMA WEST LOOP, INC. | Chicago, IL | Byline Bank |
| $150,000–350,000 | SPANTREE TECHNOLOGY GROUP LLC | CHICAGO, IL | Byline Bank |
| $1–2 million | SPAULDING CLINICAL RESEARCH LLC | WEST BEND, WI | Byline Bank |
| $1–2 million | SPECIALTIES BINDING CORPORATION | Elk Grove Village, IL | Byline Bank |
| $1–2 million | SPECIALTIES BINDING CORPORATION | Elk Grove Village, IL | Byline Bank |
| $150,000–350,000 | SPECIALTY BUILDERS INC. | Chicago, IL | Byline Bank |
| $350,000–1 million | SPECIALTY BUILDERS, INC. | CHICAGO, IL | Byline Bank |
| $1–2 million | SPECIALTY CHEESE COMPANY, INC. | REESEVILLE, WI | Byline Bank |
| $150,000–350,000 | SRW INDUSTRIES LLC | Lake Zurich, IL | Byline Bank |
| $150,000–350,000 | ST MARIA GORETTI CHURCH | SCHILLER PARK, IL | Byline Bank |
| $150,000–350,000 | ST ALBERT THE GREAT CHUCRCH | BURBANK, IL | Byline Bank |
| $150,000–350,000 | ST ALBERT THE GREAT CHUCRCH | Burbank, IL | Byline Bank |
| $150,000–350,000 | ST ATHANASIUS PARISH/THE CATHOLIC BISHOP OF CHICAGO | EVANSTON, IL | Byline Bank |
| $150,000–350,000 | ST BRUNO SCHOOL | CHICAGO, IL | Byline Bank |
| $150,000–350,000 | ST GABRIEL SCHOOL/THE CATHOLIC BISHOP OF CHICAGO | CHICAGO, IL | Byline Bank |
| $150,000–350,000 | ST GALL CHURCH | CHICAGO, IL | Byline Bank |
| $150,000–350,000 | ST GALL CHURCH | Chicago, IL | Byline Bank |
| $150,000–350,000 | ST LEONARD PARISH/ THE CATHOLIC BISHOP OF CHICAGO | Berwyn, IL | Byline Bank |
| $150,000–350,000 | ST LEONARD PARISH/ THE CATHOLIC BISHOP OF CHICAGO | Berwyn, IL | Byline Bank |
| $150,000–350,000 | ST RICHARDS CHURCH | CHICAGO, IL | Byline Bank |
| $150,000–350,000 | ST RICHARDS CHURCH | Chicago, IL | Byline Bank |
| $150,000–350,000 | ST ROBERT BELLARMINE SCHOOL/ CATHOLIC BISHOP OF CHICAGO | CHICAGO, IL | Byline Bank |
| $150,000–350,000 | ST. AGNES SCHOOL | CHICAGO, IL | Byline Bank |
| $150,000–350,000 | ST. AGNES SCHOOL | Chicago, IL | Byline Bank |
| $350,000–1 million | ST. DANIEL THE PROPHET PARISH & SCHOOL/ THE CATHOLIC BISHOP | CHICAGO, IL | Byline Bank |
| $350,000–1 million | ST. DANIEL THE PROPHET PARISH & SCHOOL/ THE CATHOLIC BISHOP | Chicago, IL | Byline Bank |
| $350,000–1 million | ST. GILES PARISH/THE CATHOLIC BISHOP OF CHICAGO | Oak Park, IL | Byline Bank |
| $150,000–350,000 | ST. STANISLAUS KOSTKA | Chicago, IL | Byline Bank |
| $150,000–350,000 | ST. STANISLAUS KOSTKA | Chicago, IL | Byline Bank |
| $150,000–350,000 | ST. VINCENT FERRER CHURCH CATHOLIC BISHOP OF CHICAGO | River Forest, IL | Byline Bank |
| $2–5 million | STAFFING NETWORK HOLDINGS LLC | VILLA PARK, IL | Byline Bank |
| $350,000–1 million | STAHL COWEN CROWLEY ADDIS LLC | Chicago, IL | Byline Bank |
| $350,000–1 million | STANDARD HEAT TREATING BUILDINGS LLC | Cicero, IL | Byline Bank |
| $350,000–1 million | STANDARD HEAT TREATING BUILDINGS LLC | CICERO, IL | Byline Bank |
| $350,000–1 million | STANLEY SPRING & STAMPING CORP. | Chicago, IL | Byline Bank |
| $150,000–350,000 | STANRON CORP. | Ft Lauderdale, FL | Byline Bank |
| $150,000–350,000 | STANRON CORP. | Ft Lauderdale, FL | Byline Bank |
| $150,000–350,000 | STANSBURY MANUFACTURING INCORPORATED | Edmond, OK | Byline Bank |
| $150,000–350,000 | STATE DISPOSAL SERVICES LLC | MILWAUKEE, WI | Byline Bank |
| $150,000–350,000 | STEAMGARD, LLC | Vernon Hills, IL | Byline Bank |
| $150,000–350,000 | STEPHENS DENTISTRY LTD. | Evanston, IL | Byline Bank |
| $150,000–350,000 | STEPHENS DENTISTRY, LTD. | Evanston, IL | Byline Bank |