Gensler, Jacobs, and STO Building Group head BD+C's rankings of the nation's largest office building sector architecture, engineering, and construction firms, as reported in the 2020 Giants 400 Report.
| Top 190 Office Sector Architecture and AE Firms for 2020 | ||
| FIRM | 2019 REVENUE | |
| 1 | Gensler | $868,807,631 |
| 2 | Perkins and Will | $172,726,630 |
| 3 | HOK | $165,571,000 |
| 4 | Stantec | $158,997,330 |
| 5 | Interior Architects | $145,320,509 |
| 6 | Nelson Worldwide | $109,122,000 |
| 7 | Skidmore, Owings & Merrill | $94,244,051 |
| 8 | SmithGroup | $80,060,328 |
| 9 | ZGF Architects | $64,087,622 |
| 10 | NBBJ | $60,500,000 |
| 11 | CallisonRTKL | $53,130,028 |
| 12 | HKS | $53,024,537 |
| 13 | TPG Architecture | $47,710,000 |
| 14 | Ware Malcomb | $41,292,378 |
| 15 | HGA | $41,047,749 |
| 16 | DLR Group | $40,938,000 |
| 17 | Corgan | $38,302,926 |
| 18 | HLW | $37,400,000 |
| 19 | Ted Moudis Associates | $36,000,000 |
| 20 | LPA | $35,465,043 |
| 21 | Page | $35,250,000 |
| 22 | HDR | $32,881,189 |
| 23 | RSP Architects | $32,701,000 |
| 24 | Perkins Eastman | $32,320,000 |
| 25 | Elkus Manfredi Architects | $30,586,000 |
| 26 | Kirksey Architecture | $27,587,660 |
| 27 | BHDP Architecture | $25,053,843 |
| 28 | Goettsch Partners | $24,500,000 |
| 29 | CannonDesign | $24,000,000 |
| 30 | Whitman Requardt and Associates | $23,881,726 |
| 31 | CBT | $23,257,492 |
| 32 | EYP Architecture & Engineering | $21,204,244 |
| 33 | Vocon | $19,600,000 |
| 34 | Little Diversified Architectural Consulting | $19,131,589 |
| 35 | LMN Architects | $17,970,000 |
| 36 | Quinn Evans | $15,911,436 |
| 37 | EXP | $15,304,234 |
| 38 | Clark Nexsen | $15,094,000 |
| 39 | Leo A Daly | $14,636,761 |
| 40 | Partners by Design | $14,250,000 |
| 41 | Huntsman Architectural Group | $13,901,623 |
| 42 | Solomon Cordwell Buenz (SCB) | $12,649,638 |
| 43 | LS3P | $12,637,725 |
| 44 | Cooper Carry | $12,059,200 |
| 45 | Sasaki | $11,971,104 |
| 46 | Fogarty Finger Architecture | $10,903,750 |
| 47 | RS&H | $10,400,000 |
| 48 | Flad Architects | $10,240,000 |
| 49 | Marmon Mok Architecture | $10,234,572 |
| 50 | Eppstein Uhen Architects (EUA) | $10,065,000 |
| 51 | PGAL | $9,895,000 |
| 52 | FXCollaborative | $9,684,285 |
| 53 | Cuningham Group Architecture | $9,240,014 |
| 54 | H. Hendy Associates | $9,187,183 |
| 55 | MBH Architects | $8,866,000 |
| 56 | Smallwood | $8,791,063 |
| 57 | Ennead Architects | $8,638,827 |
| 58 | Bergmann | $8,530,000 |
| 59 | Wright Heerema Architects | $8,514,977 |
| 60 | Adrian Smith + Gordon Gill Architecture | $8,398,778 |
| 61 | HED | $8,000,000 |
| 62 | Ratio Architects | $7,861,870 |
| 63 | FCA | $7,321,311 |
| 64 | REES | $7,316,178 |
| 65 | Dyer Brown Architects | $7,259,472 |
| 66 | AHL | $6,895,871 |
| 67 | Margulies Perruzzi | $6,461,535 |
| 68 | Handel Architects | $6,112,668 |
| 69 | Mithun | $5,737,410 |
| 70 | Moody Nolan | $5,589,630 |
| 71 | Baskervill | $5,454,025 |
| 72 | GBBN | $5,453,000 |
| 73 | S/L/A/M Collaborative, The | $5,447,000 |
| 74 | GFF | $5,335,306 |
| 75 | Montroy DeMarco Architecture | $5,221,000 |
| 76 | Rule Joy Trammell + Rubio | $5,200,429 |
| 77 | Wendel | $5,030,994 |
| 78 | Taylor Design | $5,026,000 |
| 79 | BWBR | $4,994,000 |
| 80 | Ballinger | $4,918,570 |
| 81 | DGA | $4,880,870 |
| 82 | Davis Brody Bond | $4,729,651 |
| 83 | Hoefer Wysocki | $4,491,000 |
| 84 | Clark Enersen Partners, The | $4,326,738 |
| 85 | Goodwyn, Mills and Cawood | $4,300,687 |
| 86 | M+A Architects | $4,269,145 |
| 87 | Wold Architects and Engineers | $4,000,000 |
| 88 | Barge Design Solutions | $3,993,154 |
| 89 | CO Architects | $3,820,600 |
| 90 | Carrier Johnson + Culture | $3,544,275 |
| 91 | RDG Planning & Design | $3,405,144 |
| 92 | WDG Architecture | $3,400,000 |
| 93 | G70 | $3,378,000 |
| 94 | HuntonBrady Architects | $3,304,349 |
| 95 | Progressive AE | $3,294,454 |
| 96 | YGH Architecture | $3,236,980 |
| 97 | Stevens & Wilkinson | $3,100,000 |
| 98 | Fentress Architects | $3,000,000 |
| 99 | EwingCole | $3,000,000 |
| 100 | Champlin Architecture | $2,950,597 |
| 101 | KGD Architecture | $2,937,873 |
| 102 | Kahler Slater | $2,905,759 |
| 103 | JRS Architect | $2,625,000 |
| 104 | Architecture, Incorporated | $2,614,500 |
| 105 | CPL | $2,487,186 |
| 106 | Alliiance | $2,472,244 |
| 107 | HNTB Corporation | $2,417,321 |
| 108 | Diamond Schmitt Architects | $2,313,619 |
| 109 | RDC / Studio One Eleven | $2,178,294 |
| 110 | Lawrence Group | $2,136,800 |
| 111 | Emersion Design | $2,136,612 |
| 112 | Ayers Saint Gross | $1,969,302 |
| 113 | DLZ Corporation | $1,938,600 |
| 114 | AE7 | $1,643,800 |
| 115 | Eckenhoff Saunders Architects | $1,520,000 |
| 116 | Weber Thompson | $1,437,252 |
| 117 | TRIA | $1,407,750 |
| 118 | JLG Architects | $1,391,173 |
| 119 | HMC Architects | $1,311,205 |
| 120 | AE Works Ltd. | $1,185,000 |
| 121 | FitzGerald | $1,145,000 |
| 122 | Populous | $1,127,938 |
| 123 | Randall-Paulson Architects | $1,049,642 |
| 124 | H2M Architects + Engineers | $1,035,437 |
| 125 | BSA LifeStructures | $1,007,212 |
| 126 | Dattner Architects | $995,686 |
| 127 | Larson Design Group | $987,285 |
| 128 | TETER | $973,396 |
| 129 | Crawford Architects | $964,100 |
| 130 | Method Architecture | $956,797 |
| 131 | Spiezle Group | $916,000 |
| 132 | WATG | $866,365 |
| 133 | Kitchen & Associates | $840,000 |
| 134 | Garmann/Miller Architects-Engineers | $835,759 |
| 135 | Hussey Gay Bell | $817,879 |
| 136 | DLA+ Architecture & Interior Design | $815,053 |
| 137 | Urbahn Architects | $752,958 |
| 138 | SWBR Architecture, Engineering & Landscape Architecture | $712,102 |
| 139 | Design 3 International (D3i) | $700,000 |
| 140 | TreanorHL | $650,000 |
| 141 | BLDD Architects | $630,000 |
| 142 | WD Partners | $600,000 |
| 143 | SHP | $600,000 |
| 144 | VLK Architects | $595,980 |
| 145 | SchenkelShultz Architecture | $568,322 |
| 146 | Shepley Bulfinch | $552,472 |
| 147 | Fugleberg Koch | $550,000 |
| 148 | Niles Bolton Associates | $506,136 |
| 149 | Fennick McCredie Architecture | $470,340 |
| 150 | Legat Architects | $463,000 |
| 151 | FGM Architects | $449,558 |
| 152 | HBG Design | $426,000 |
| 153 | Prellwitz Chilinski Associates (PCA) | $422,769 |
| 154 | BBGM | $420,000 |
| 155 | Caldwell Associates Architects | $407,554 |
| 156 | Harvard Jolly Architecture | $394,173 |
| 157 | KCCT | $354,695 |
| 158 | Architectural Design Consultants | $330,000 |
| 159 | Architecture Design Collaborative | $325,000 |
| 160 | TEG Architects | $305,835 |
| 161 | GSB | $302,750 |
| 162 | Huitt-Zollars, Inc. | $287,000 |
| 163 | NAC Architecture | $273,416 |
| 164 | GreenbergFarrow | $268,611 |
| 165 | BLT Architects | $267,293 |
| 166 | Premier Project Management | $250,000 |
| 167 | BKV Group | $243,563 |
| 168 | NSPJ Architects | $238,656 |
| 169 | Architectural Resources Cambridge (ARC) | $224,460 |
| 170 | CESO | $219,879 |
| 171 | WLC Architects | $213,373 |
| 172 | JN+A | $200,000 |
| 173 | Cuhaci & Peterson | $156,558 |
| 174 | 3877 Design | $150,731 |
| 175 | ATA Beilharz Architects | $150,000 |
| 176 | Bostwick Design Partnership | $145,000 |
| 177 | Humphreys & Partners Architects | $130,455 |
| 178 | Miller Dunwiddie | $121,591 |
| 179 | Ayres | $111,000 |
| 180 | 4240 Architecture | $110,000 |
| 181 | GRW | $109,361 |
| 182 | Holst Architecture | $103,065 |
| 183 | Sheehan Nagle Hartray Architects (SNHA) | $100,000 |
| 184 | RGA Architects | $89,482 |
| 185 | Core States Group | $87,910 |
| 186 | Onyx Creative | $75,000 |
| 187 | Finegold Alexander Architects | $69,383 |
| 188 | Sebree Architects | $50,000 |
| 189 | DLA Architects | $47,100 |
| 190 | Line Scale Form Architects | $45,490 |
| 191 | KTGY Architecture + Planning | $45,001 |
| 192 | 45 Architecture | $32,236 |
| 193 | Ashley McGraw Architects | $25,592 |
| 194 | Payette | $23,161 |
| Top 85 Office Sector Engineering and EA Firms for 2020 | ||
| FIRM | 2019 REVENUE | |
| 1 | Jacobs | $678,000,000 |
| 2 | AECOM | $143,500,000 |
| 3 | Burns & McDonnell | $130,906,515 |
| 4 | Thornton Tomasetti | $95,406,501 |
| 5 | WSP | $87,097,217 |
| 6 | NV5 Global | $47,429,000 |
| 7 | Dewberry | $45,519,892 |
| 8 | Syska Hennessy Group | $39,125,876 |
| 9 | Arup | $35,698,993 |
| 10 | Jaros, Baum & Bolles | $32,999,161 |
| 11 | AKF Group | $27,420,000 |
| 12 | Kimley-Horn | $24,082,352 |
| 13 | ESD | $22,807,806 |
| 14 | Bala Consulting Engineers | $21,152,000 |
| 15 | Wiley|Wilson | $19,605,200 |
| 16 | Ghafari Associates | $18,000,000 |
| 17 | BRPH Architects Engineers | $17,153,065 |
| 18 | Cushing Terrell (formerly CTA Architects Engineers) | $15,926,808 |
| 19 | IMEG Corp. | $15,297,186 |
| 20 | Salas O'Brien | $13,600,852 |
| 21 | French & Parrello Associates | $13,282,009 |
| 22 | Vanderweil Engineers | $12,943,700 |
| 23 | ME Engineers | $12,630,000 |
| 24 | KPFF Consulting Engineers | $11,800,000 |
| 25 | Shive-Hattery | $10,966,706 |
| 26 | Morrison Hershfield | $9,781,569 |
| 27 | Henderson Engineers | $8,876,124 |
| 28 | Jensen Hughes | $8,651,245 |
| 29 | Walter P Moore | $7,569,073 |
| 30 | Martin/Martin | $7,507,240 |
| 31 | Highland Associates | $7,500,000 |
| 32 | Newcomb & Boyd | $7,124,854 |
| 33 | Halff Associates | $6,722,000 |
| 34 | Affiliated Engineers | $6,205,261 |
| 35 | RTM Engineering Consultants | $5,372,148 |
| 36 | KZF Design | $5,259,585 |
| 37 | PS&S | $5,206,000 |
| 38 | TLC Engineering Solutions | $5,015,186 |
| 39 | CDM Smith | $4,949,164 |
| 40 | Bridgers & Paxton Consulting Engineers | $4,457,791 |
| 41 | RMF Engineering | $4,380,000 |
| 42 | Epstein | $3,926,000 |
| 43 | Stanley Consultants | $3,652,946 |
| 44 | H.F. Lenz | $3,525,000 |
| 45 | Dunham Associates | $3,500,000 |
| 46 | KCI Technologies | $3,500,000 |
| 47 | Pedco E & A Services | $3,315,000 |
| 48 | HEAPY | $2,765,137 |
| 49 | ThermalTech Engineering | $2,500,000 |
| 50 | Hixson Architecture, Engineering, Interiors | $2,500,000 |
| 51 | SSOE Group | $2,496,623 |
| 52 | Allen & Shariff | $2,435,230 |
| 53 | DeSimone Consulting Engineers | $2,423,123 |
| 54 | Osborn Engineering | $2,210,000 |
| 55 | Peter Basso Associates | $2,050,000 |
| 56 | Bernhard | $2,000,000 |
| 57 | OLA Consulting Engineers | $1,950,000 |
| 58 | GRAEF | $1,931,155 |
| 59 | EAPC Architects Engineers | $1,851,622 |
| 60 | Kohler Ronan | $1,828,055 |
| 61 | Sherlock, Smith & Adams | $1,700,000 |
| 62 | Paradigm Structural Engineers | $1,621,779 |
| 63 | Wick Fisher White | $1,620,000 |
| 64 | M/E Engineering | $1,436,365 |
| 65 | Wallace Engineering | $1,400,000 |
| 66 | JQ Engineering | $1,316,344 |
| 67 | LaBella Associates | $1,275,138 |
| 68 | Milhouse Engineering and Construction | $1,267,560 |
| 69 | Primera Engineers | $1,155,913 |
| 70 | KCL Engineering | $1,102,005 |
| 71 | Karpinski Engineering | $989,440 |
| 72 | KLH Engineers | $964,778 |
| 73 | Tec Inc. Engineering & Design | $796,653 |
| 74 | LBYD Engineers | $788,124 |
| 75 | Spectrum Engineers | $762,318 |
| 76 | Architectural Engineers Inc. | $746,656 |
| 77 | Schaefer | $703,733 |
| 78 | SSC Engineering | $626,375 |
| 79 | Smith Seckman Reid | $618,672 |
| 80 | Apogee Consulting Group | $600,000 |
| 81 | P2S | $546,621 |
| 82 | PBS Engineers | $464,000 |
| 83 | Woolpert | $433,822 |
| 84 | Arora Engineers | $416,266 |
| 85 | Davis, Bowen & Friedel | $392,998 |
| 86 | RMH Group, The | $298,303 |
| 87 | RWB Consulting Engineers | $135,000 |
| 88 | Marque Engineering | $108,975 |
| Top 105 Office Sector Contractors and CM Firms for 2020 | ||
| FIRM | 2019 REVENUE | |
| 1 | STO Building Group | $3,526,000,000 |
| 2 | Turner Construction Company | $3,513,982,346 |
| 3 | AECOM | $2,127,500,000 |
| 4 | DPR Construction | $1,550,217,000 |
| 5 | Hathaway Dinwiddie Construction | $1,465,823,000 |
| 6 | Gilbane Building Company | $1,453,351,000 |
| 7 | Clark Group | $1,320,248,708 |
| 8 | Clayco | $1,203,000,000 |
| 9 | Balfour Beatty US | $1,144,504,247 |
| 10 | Whiting-Turner Contracting Company, The | $1,059,214,111 |
| 11 | Clune Construction | $980,723,825 |
| 12 | Hensel Phelps | $900,226,210 |
| 13 | J.T. Magen and Company | $855,382,915 |
| 14 | James G. Davis Construction | $734,569,011 |
| 15 | Swinerton | $729,000,000 |
| 16 | Brasfield & Gorrie | $659,107,031 |
| 17 | Level 10 Construction | $644,598,587 |
| 18 | PCL Construction Enterprises | $625,234,697 |
| 19 | Webcor | $585,517,601 |
| 20 | JE Dunn Construction | $582,295,220 |
| 21 | Skanska USA | $562,573,964 |
| 22 | Holder Construction | $559,000,000 |
| 23 | Austin Industries | $467,099,463 |
| 24 | Mortenson | $430,361,000 |
| 25 | Jacobs | $352,023,000 |
| 26 | Choate Construction | $334,110,892 |
| 27 | Executive Construction | $324,000,000 |
| 28 | Ryan Companies US | $310,940,560 |
| 29 | Skender | $243,235,078 |
| 30 | Shawmut Design and Construction | $214,083,373 |
| 31 | McCarthy Holdings | $209,060,557 |
| 32 | Manhattan Construction Group | $192,238,409 |
| 33 | Columbia | $191,000,000 |
| 34 | Power Construction | $182,000,000 |
| 35 | Adolfson & Peterson Construction | $178,343,247 |
| 36 | Pepper Construction | $170,170,593 |
| 37 | Walbridge | $168,568,377 |
| 38 | Sundt Construction | $167,671,276 |
| 39 | Lendlease | $163,984,753 |
| 40 | Barton Malow | $146,500,000 |
| 41 | Suffolk Construction | $142,082,063 |
| 42 | Hunter Roberts Construction | $141,000,000 |
| 43 | Crossland Construction | $131,547,552 |
| 44 | JLL | $129,958,880 |
| 45 | Hoffman Construction | $129,735,048 |
| 46 | New South Construction | $128,741,000 |
| 47 | Walsh Group, The | $121,864,925 |
| 48 | Nabholz Corporation | $119,025,185 |
| 49 | Rogers-O'Brien Construction | $117,837,464 |
| 50 | Burns & McDonnell | $104,667,925 |
| 51 | Andersen Construction | $94,800,000 |
| 52 | C.W. Driver Companies | $89,884,883 |
| 53 | Haskell | $88,121,904 |
| 54 | Hill & Wilkinson General Contractors | $87,643,759 |
| 55 | Joeris General Contractors | $81,800,279 |
| 56 | DeAngelis Diamond | $81,289,136 |
| 57 | Messer Construction | $74,523,805 |
| 58 | Yates Companies, The | $74,452,000 |
| 59 | McCownGordon Construction, LLC | $72,655,071 |
| 60 | Paric Holdings | $67,000,000 |
| 61 | Clancy & Theys Construction | $63,872,523 |
| 62 | Batson-Cook Construction | $61,647,414 |
| 63 | CORE Construction Group | $56,093,504 |
| 64 | Hoar Construction | $55,071,000 |
| 65 | Millie and Severson General Contractors | $53,396,093 |
| 66 | Kaufman Lynn Construction | $52,829,079 |
| 67 | LeChase Construction Services | $50,339,400 |
| 68 | Russell Construction | $49,000,000 |
| 69 | Schimenti Construction Company | $49,000,000 |
| 70 | BL Harbert International | $48,205,756 |
| 71 | W. M. Jordan Company | $46,268,941 |
| 72 | McShane Companies, The | $46,159,719 |
| 73 | Wohlsen Construction | $36,786,000 |
| 74 | Haselden Construction | $36,560,175 |
| 75 | Fortis Construction | $34,409,154 |
| 76 | W.E. O'Neil Construction | $34,174,807 |
| 77 | Elford | $30,000,000 |
| 78 | CG Schmidt | $28,300,000 |
| 79 | Bette Companies, The | $26,775,310 |
| 80 | Robins & Morton | $20,989,859 |
| 81 | Cumming | $20,063,000 |
| 82 | Kraus-Anderson Construction | $19,000,000 |
| 83 | Donohoe Construction | $18,042,552 |
| 84 | Harkins Builders | $18,000,000 |
| 85 | Boldt Company, The | $16,558,000 |
| 86 | Sachse Construction | $15,000,000 |
| 87 | BlueScope Construction | $10,875,850 |
| 88 | KBE Building Corporation | $9,912,292 |
| 89 | S. M. Wilson | $8,122,762 |
| 90 | Hill International | $6,196,131 |
| 91 | UrbanBuilt | $5,836,965 |
| 92 | Hagerman Group, The | $5,000,000 |
| 93 | Weis Builders | $3,974,236 |
| 94 | Lawrence Group | $3,447,600 |
| 95 | Juneau Construction Company | $3,200,000 |
| 96 | VJS Construction Services | $2,531,856 |
| 97 | Benchmark Construction | $2,377,816 |
| 98 | CSI Construction | $2,000,000 |
| 99 | Progressive AE | $1,987,128 |
| 100 | JLG Architects | $1,695,382 |
| 101 | KCI Technologies | $1,500,000 |
| 102 | Graycor | $1,273,968 |
| 103 | STV | $1,192,172 |
| 104 | BRPH Architects Engineers | $906,483 |
| 105 | Montroy DeMarco Architecture | $875,000 |
| 106 | Henderson Engineers | $662,241 |
| 107 | S/L/A/M Collaborative, The | $595,000 |
| 108 | Cotter Consulting | $335,763 |
| 109 | Premier Project Management | $250,000 |
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