UFP Industries (UFPI) 10-Q 5 May 21 2021 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	3 Months Ended
	Mar. 27, 2021shares
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 27, 2021
Entity File Number	0-22684
Entity Registrant Name	UFP INDUSTRIES, INC.
Entity Incorporation, State or Country Code	MI
Entity Tax Identification Number	38-1465835
Entity Address, Address Line One	2801 East Beltline NE
Entity Address, City or Town	Grand Rapids
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	49525
City Area Code	616
Local Phone Number	364-6161
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	UFPI
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)	61,838,256
Current Fiscal Year End Date	--12-25
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000912767
Amendment Flag	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020	Mar. 28, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 44,399	$ 436,507	$ 32,129
Restricted cash	629	101	724
Investments	31,439	24,308	17,778
Accounts receivable, net	808,105	470,504	460,821
Inventories:
Raw materials	438,762	316,481	263,857
Finished goods	384,652	250,813	246,824
Total inventories	823,414	567,294	510,681
Refundable income taxes		5,836	2,624
Other current assets	29,072	33,812	36,152
TOTAL CURRENT ASSETS	1,737,058	1,538,362	1,060,909
DEFERRED INCOME TAXES	2,290	2,413	2,145
RESTRICTED INVESTMENTS	17,209	17,565	16,111
RIGHT OF USE ASSETS	98,404	77,245	81,065
OTHER ASSETS	27,358	20,298	25,198
GOODWILL	314,189	252,193	246,459
INDEFINITE-LIVED INTANGIBLE ASSETS	7,401	7,401	7,288
OTHER INTANGIBLE ASSETS, NET	93,812	72,252	46,232
PROPERTY, PLANT AND EQUIPMENT:
Property, plant and equipment	1,060,893	974,497	906,171
Less accumulated depreciation and amortization	(572,526)	(557,335)	(508,596)
PROPERTY, PLANT AND EQUIPMENT, NET	488,367	417,162	397,575
TOTAL ASSETS	2,786,088	2,404,891	1,882,982
CURRENT LIABILITIES:
Cash overdraft	47,140
Accounts payable	299,398	211,518	162,039
Accrued liabilities:
Compensation and benefits	137,208	166,478	92,504
Income taxes	25,565
Other	78,560	69,104	55,760
Current portion of lease liability	23,051	16,549	16,180
Current portion of long-term debt	109	100	2,772
TOTAL CURRENT LIABILITIES	611,031	463,749	329,255
LONG-TERM DEBT	426,310	311,607	160,550
LEASE LIABILITY	76,408	61,509	64,937
DEFERRED INCOME TAXES	34,940	25,266	22,799
OTHER LIABILITIES	50,856	59,608	33,159
TOTAL LIABILITIES	1,199,545	921,739	610,700
Controlling interest shareholders' equity:
Preferred stock, no par value; shares authorized 1,000,000; issued and outstanding, none
Common stock, $1 par value; shares authorized 80,000,000; issued and outstanding, 61,838,256, 61,205,780 and 61,102,481	61,838	61,206	61,102
Additional paid-in capital	231,111	218,224	211,724
Retained earnings	1,276,722	1,182,680	998,996
Accumulated other comprehensive loss	(3,464)	(1,794)	(11,110)
Total controlling interest shareholders' equity	1,566,207	1,460,316	1,260,712
Noncontrolling interest	20,336	22,836	11,570
TOTAL SHAREHOLDERS' EQUITY	1,586,543	1,483,152	1,272,282
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 2,786,088	$ 2,404,891	$ 1,882,982

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 27, 2021	Dec. 26, 2020	Mar. 28, 2020
SHAREHOLDERS' EQUITY:
Preferred stock, no par value (in dollars per share)	$ 0	$ 0	$ 0
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0	0
Preferred stock, shares outstanding (in shares)	0	0	0
Common Stock, Par or Stated Value Per Share	$ 1	$ 1	$ 1
Common stock, shares authorized (in shares)	80,000,000	80,000,000	80,000,000
Common stock, shares issued (in shares)	61,838,256	61,205,780	61,102,481
Common stock, shares outstanding (in shares)	61,838,256	61,205,780	61,102,481

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME
NET SALES	$ 1,825,004	$ 1,032,062
COST OF GOODS SOLD	1,538,450	864,826
GROSS PROFIT	286,554	167,236
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	150,098	109,339
OTHER LOSSES (GAINS), NET	(1,031)	(735)
EARNINGS FROM OPERATIONS	137,487	58,632
INTEREST EXPENSE	3,151	1,908
INTEREST AND INVESTMENT (INCOME) LOSS	(2,296)	2,832
EQUITY IN EARNINGS OF INVESTEE	630
NET INTEREST EXPENSE	1,485	4,740
EARNINGS BEFORE INCOME TAXES	136,002	53,892
INCOME TAXES	31,751	13,322
NET EARNINGS	104,251	40,570
LESS NET EARNINGS ATTRIBUTABLE TO NONCONTROLLING INTEREST	(940)	(411)
NET EARNINGS ATTRIBUTABLE TO CONTROLLING INTEREST	$ 103,311	$ 40,159
EARNINGS PER SHARE - BASIC (USD per share)	$ 1.67	$ 0.65
EARNINGS PER SHARE - DILUTED (USD per share)	$ 1.67	$ 0.65
OTHER COMPREHENSIVE INCOME:
NET EARNINGS	$ 104,251	$ 40,570
OTHER COMPREHENSIVE GAIN (LOSS)	(2,196)	(8,556)
COMPREHENSIVE INCOME	102,055	32,014
LESS COMPREHENSIVE INCOME ATTRIBUTABLE TO NONCONTROLLING INTEREST	(414)	1,924
COMPREHENSIVE INCOME ATTRIBUTABLE TO CONTROLLING INTEREST	$ 101,641	$ 33,938

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Earnings	Noncontrolling Interest	Total
Beginning balance at Dec. 28, 2019	$ 61,409	$ 192,173	$ 995,022	$ (4,889)	$ 14,018	$ 1,257,733
Increase (Decrease) in Stockholders' Equity
Net earnings			40,159		411	40,570
Foreign currency translation adjustment				(5,951)	(2,335)	(8,286)
Unrealized loss on debt securities				(270)		(270)
Distributions to noncontrolling interest					(299)	(299)
Additional purchases of noncontrolling interest		130			(225)	(95)
Cash dividends			(7,730)			(7,730)
Issuance of shares under employee stock purchase plans	10	309				319
Net issuance of shares under stock grant programs	350	12,454	1			12,805
Issuance of shares under deferred compensation plans	89	(89)
Repurchase of shares	(756)		(28,456)			(29,212)
Expense associated with share-based compensation arrangements		1,404				1,404
Accrued expense under deferred compensation plans		5,343				5,343
Ending balance at Mar. 28, 2020	61,102	211,724	998,996	(11,110)	11,570	1,272,282
Beginning balance at Dec. 26, 2020	61,206	218,224	1,182,680	(1,794)	22,836	1,483,152
Increase (Decrease) in Stockholders' Equity
Net earnings			103,311		940	104,251
Foreign currency translation adjustment				(374)	(526)	(900)
Unrealized loss on debt securities				(1,296)		(1,296)
Distributions to noncontrolling interest					(2,914)	(2,914)
Cash dividends			(9,274)			(9,274)
Issuance of shares under employee stock purchase plans	6	357				363
Net issuance of shares under stock grant programs	537	3,888	5			4,430
Issuance of shares under deferred compensation plans	89	(89)
Expense associated with share-based compensation arrangements		2,936				2,936
Accrued expense under deferred compensation plans		5,795				5,795
Ending balance at Mar. 27, 2021	$ 61,838	$ 231,111	$ 1,276,722	$ (3,464)	$ 20,336	$ 1,586,543

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Increase (Decrease) in Stockholders' Equity
Cash dividends per share (USD per share)	$ 0.15	$ 0.125
Issuance of shares under employee stock plans (in shares)	5,816	10,549
Issuance of shares under stock grant programs (in shares)	536,970	350,124
Issuance of shares under deferred compensation plans (in shares)	89,690	89,616
Repurchase of shares (in shares)		756,397

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net earnings	$ 104,251	$ 40,570
Adjustments to reconcile net earnings to net cash from operating activities:
Depreciation	18,733	15,717
Amortization of intangibles	3,998	1,571
Expense associated with share-based and grant compensation arrangements	2,981	1,444
Deferred income taxes	142	286
Unrealized (gain) loss on investments and other	(1,754)	3,173
Equity in earnings of investee	630
Net (gain) on disposition of assets	(532)	(285)
Changes in:
Accounts receivable	(253,323)	(94,253)
Inventories	(207,768)	(25,783)
Accounts payable and cash overdraft	121,892	20,047
Accrued liabilities and other	14,090	(8,648)
NET CASH USED IN OPERATING ACTIVITIES	(196,660)	(46,161)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property, plant and equipment	(34,656)	(27,286)
Proceeds from sale of property, plant and equipment	5,062	409
Acquisitions and purchases of non-controlling interest, net of cash received	(261,133)	(18,487)
Purchases of investments	(8,738)	(14,052)
Proceeds from sale of investments	3,381	11,260
Other	(414)	(54)
NET CASH USED IN INVESTING ACTIVITIES	(296,498)	(48,210)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings under revolving credit facilities	236,280	6,759
Repayments under revolving credit facilities	(121,570)	(6,498)
Contingent consideration payments and other	(627)	(3,074)
Proceeds from issuance of common stock	363	319
Dividends paid to shareholders	(9,274)	(7,730)
Distributions to noncontrolling interest	(2,914)	(299)
Repurchase of common stock		(29,212)
Other	(331)	12
NET CASH FROM (USED IN) FINANCING ACTIVITIES	101,927	(39,723)
Effect of exchange rate changes on cash	(349)	(1,719)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(391,580)	(135,813)
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF YEAR	436,608	168,666
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, END OF PERIOD	$ 45,028	$ 32,853

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - SUPPLEMENTAL (Parenthetical) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020	Mar. 28, 2020
RECONCILIATION OF CASH AND CASH EQUIVALENTS AND RESTRICTED CASH:
Cash and cash equivalents, beginning of period	$ 436,507	$ 32,129	$ 168,336
Restricted cash, beginning of period	101	724	330
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, BEGINNING OF YEAR	436,608	32,853	168,666
Cash and cash equivalents, end of period	44,399	436,507	32,129
Restricted cash, end of period	629	101	724
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH, END OF PERIOD	$ 45,028	$ 436,608	$ 32,853

CONDENSED CONSOLIDATED STATEM_6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - SUPPLEMENTAL AND NON-CASH FINANCING ACTIVITIES (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
SUPPLEMENTAL INFORMATION:
Interest paid	$ 2,694	$ 374
Income taxes paid	249	2,307
NON-CASH FINANCING ACTIVITIES:
Common stock issued under deferred compensation plans	$ 5,359	$ 4,900

BASIS OF PRESENTATION

BASIS OF PRESENTATION	3 Months Ended
	Mar. 27, 2021
BASIS OF PRESENTATION
BASIS OF PRESENTATION	A. BASIS OF PRESENTATION The accompanying unaudited interim consolidated condensed financial statements (the “Financial Statements”) include our accounts and those of our wholly-owned and majority-owned subsidiaries and partnerships, and have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, the Financial Statements do not include all the information and footnotes normally included in the annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States. All intercompany transactions and balances have been eliminated. Certain prior year amounts have been reclassified to conform to the current year presentation. In our opinion, the Financial Statements contain all material adjustments necessary to present fairly our consolidated financial position, results of operations and cash flows for the interim periods presented. All such adjustments are of a normal recurring nature. These Financial Statements should be read in conjunction with the annual consolidated financial statements, and footnotes thereto, included in our Annual Report to Shareholders on Form 10-K for the fiscal year ended December 26, 2020. Seasonality has a significant impact on our working capital from March to August, which historically results in negative or modest cash flows from operations in our first and second quarters. Conversely, we experience a substantial decrease in working capital from September to February which typically results in significant cash flow from operations in our third and fourth quarters. For comparative purposes, we have included the March 28, 2020 balances in the accompanying unaudited condensed consolidated balance sheets.

FAIR VALUE

FAIR VALUE	3 Months Ended
	Mar. 27, 2021
FAIR VALUE
FAIR VALUE	B. FAIR VALUE We apply the provisions of ASC 820, Fair Value Measurements and Disclosures ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 27, 2021 ​ March 28, 2020 ​ ​ Quoted ​ Prices with ​ ​ ​ ​ ​ ​ ​ Quoted ​ Prices with ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ Other ​ ​ Prices with ​ ​ ​ ​ Prices in ​ Other ​ ​ Prices with ​ ​ ​ ​ ​ Active ​ Observable ​ ​ Unobservable ​ ​ ​ ​ Active ​ Observable ​ ​ Unobservable ​ ​ ​ ​ ​ Markets ​ Inputs ​ ​ Inputs ​ ​ ​ ​ Markets ​ Inputs ​ ​ Inputs ​ ​ ​ ​ (Level 1) (Level 2) ​ (Level 3) ​ Total (Level 1) (Level 2) ​ (Level 3) Total Money market funds ​ $ 19 $ 1,127 ​ $ — $ 1,146 $ 29,561 $ 837 ​ $ — $ 30,398 Fixed income funds ​ 244 ​ 16,264 ​ ​ — 16,508 ​ 237 ​ 15,124 ​ ​ — 15,361 Equity securities ​ 18,496 ​ — ​ ​ — 18,496 ​ 9,089 ​ — ​ ​ — 9,089 Alternative investments ​ ​ — ​ ​ — ​ ​ 2,126 ​ ​ 2,126 ​ ​ — ​ ​ — ​ ​ 1,960 ​ ​ 1,960 Mutual funds: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic stock funds ​ 9,388 ​ — ​ ​ — 9,388 ​ 5,204 ​ — ​ ​ — 5,204 International stock funds ​ 1,395 ​ — ​ ​ — 1,395 ​ 947 ​ — ​ ​ — 947 Target funds ​ 21 ​ — ​ ​ — 21 ​ 242 ​ — ​ ​ — 242 Bond funds ​ 145 ​ — ​ ​ — 145 ​ 222 ​ — ​ ​ — 222 Alternative funds ​ ​ 496 ​ ​ — ​ ​ — ​ ​ 496 ​ ​ 921 ​ ​ — ​ ​ — ​ ​ 921 Total mutual funds ​ 11,445 ​ — ​ ​ — 11,445 ​ 7,536 ​ — ​ ​ — 7,536 Total ​ $ 30,204 ​ $ 17,391 ​ $ 2,126 ​ $ 49,721 ​ $ 46,423 ​ $ 15,961 ​ $ 1,960 ​ $ 64,344 Assets at fair value ​ $ 30,204 ​ $ 17,391 ​ $ 2,126 $ 49,721 ​ $ 46,423 ​ $ 15,961 ​ $ 1,960 $ 64,344 ​ From the assets measured at fair value as of March 27, 2021, listed in the table above, $31.4 million of mutual funds, equity securities, and alternative investments are held in Investments, $0.5 million of money market funds are held in Cash and Cash Equivalents, $0.6 million of money market and mutual funds are held in Other Assets for our deferred compensation plan, and $16.9 million of fixed income funds and $0.3 million of money markets funds are held in Restricted Investments. We maintain money market, mutual funds, bonds, and/or equity securities in our non-qualified deferred compensation plan, our wholly owned licensed captive insurance company, and assets held in financial institutions. These funds are valued at prices quoted in an active exchange market and are included in “Cash and Cash Equivalents”, “Investments”, “Other Assets”, and “Restricted Investments”. We have elected not to apply the fair value option under ASC 825, Financial Instruments, In accordance with our investment policy, our wholly-owned captive, Ardellis Insurance Ltd. (“Ardellis”), maintains an investment portfolio, totaling $47.9 million as of March 27, 2021, which has been included in the aforementioned table of total investments. This portfolio consists of domestic and international equity securities, alternative investments, and fixed income bonds. Ardellis’ available for sale investment portfolio, including funds held with the State of Michigan, consists of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 27, 2021 ​ March 28, 2020 ​ ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Cost Gain/(Loss) Fair Value Cost Gain/(Loss) Fair Value Fixed Income ​ $ 15,867 $ 642 $ 16,509 ​ $ 15,257 $ 104 $ 15,361 Equity ​ 14,664 ​ 3,832 18,496 ​ 9,690 ​ (601) 9,089 Mutual Funds ​ ​ 8,769 ​ ​ 2,049 ​ 10,818 ​ ​ 7,298 ​ ​ (569) ​ 6,729 Alternative Investments ​ ​ 1,929 ​ ​ 197 ​ 2,126 ​ ​ 1,834 ​ ​ 126 ​ 1,960 Total ​ $ 41,229 ​ $ 6,720 $ 47,949 ​ $ 34,079 ​ $ (940) $ 33,139 ​ Our fixed income investments consist of a blend of US Government and Agency bonds and investment grade corporate bonds with varying maturities. Our equity investments consist of small, mid, and large cap growth and value funds, as well as international equity. Our mutual fund investments consist of domestic and international stock. Our alternative investments consist of a private real estate income trust which is valued as a Level 3 asset. The net unrealized gain was $6.7 million. Carrying amounts above are recorded in the investments and restricted investments line items within the balance sheet as of March 27, 2021 and March 28, 2020.

REVENUE RECOGNITION

REVENUE RECOGNITION	3 Months Ended
	Mar. 27, 2021
REVENUE RECOGNITION
REVENUE RECOGNITION	C. REVENUE RECOGNITION Within the three primary segments (Retail, Industrial, and Construction) that the Company operates, there are a variety of written agreements governing the sale of our products and services. The transaction price is stated at the purchase order level, which includes shipping and/or freight costs and any applicable governmental authority taxes. The majority of our contracts have a single performance obligation concentrated around the delivery of goods to the carrier, Free On Board (FOB) shipping point. Therefore, revenue is recognized when this performance obligation is satisfied. Generally, title and control passes at the time of shipment. In certain circumstances, the customer takes title when the shipment arrives at the destination. However, our shipping process is typically completed the same day. Certain customer products that we provide require installation by the Company or a 3 rd rd The Company utilizes rebates, credits, discounts and/or cash-based incentives with certain customers which are accounted for as variable consideration. We estimate these amounts based on the expected amount to be provided to customers and reduce revenues recognized. We believe that there will not be significant changes to our estimates of variable consideration. The allocation of these costs are applied at the invoice level and recognized in conjunction with revenue. Additionally, returns and refunds are estimated on a historical and expected basis which is a reduction of revenue recognized. Earnings on construction contracts are reflected in operations using over time accounting, under either cost to cost or units of delivery methods, depending on the nature of the business at individual operations, which is in accordance with ASC 606 as revenue is recognized when certain performance obligations are performed. Under over time accounting using the cost to cost method, revenues and related earnings on construction contracts are measured by the relationships of actual costs incurred related to the total estimated costs. Under over time accounting using the units of delivery method, revenues and related earnings on construction contracts are measured by the relationships of actual units produced related to the total number of units. Revisions in earnings estimates on the construction contracts are recorded in the accounting period in which the basis for such revisions becomes known. Projected losses on individual contracts are charged to operations in their entirety when such losses become apparent. Our construction contracts are generally entered into with a fixed price and completion of the projects can range from 6 The following table presents our net sales disaggregated by revenue source (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 27, March 28, ​ ​ ​ 2021 ​ 2020 ​ % Change FOB Shipping Point Revenue ​ $ 1,797,399 ​ $ 999,262 79.9% Construction Contract Revenue ​ 27,605 ​ ​ 32,800 (15.8)% Total Net Sales ​ $ 1,825,004 ​ $ 1,032,062 76.8% ​ The Construction segment comprises the construction contract revenue shown above. Construction contract revenue is primarily made up of site-built and framing customers. The following table presents the balances of over time accounting accounts which are included in “Other current assets” and “Accrued liabilities: Other”, respectively (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 27, ​ December 26, ​ March 28, ​ ​ 2021 2020 2020 Cost and Earnings in Excess of Billings ​ $ 3,408 $ 4,169 $ 5,744 Billings in Excess of Cost and Earnings ​ 9,396 ​ 11,530 9,920 ​ ​

EARNINGS PER SHARE

EARNINGS PER SHARE	3 Months Ended
	Mar. 27, 2021
EARNINGS PER SHARE
EARNINGS PER SHARE	D. EARNINGS PER SHARE The computation of earnings per share (“EPS”) is as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 27, March 28, ​ 2021 ​ 2020 ​ Numerator: ​ ​ Net earnings attributable to controlling interest $ 103,311 ​ $ 40,159 ​ Adjustment for earnings allocated to non-vested restricted common stock (3,175) ​ (1,059) ​ Net earnings for calculating EPS $ 100,136 ​ $ 39,100 ​ Denominator: ​ ​ Weighted average shares outstanding 61,889 ​ 61,842 ​ Adjustment for non-vested restricted common stock (1,902) ​ (1,630) ​ Shares for calculating basic EPS 59,987 ​ 60,212 ​ Effect of dilutive restricted common stock 28 ​ 18 ​ Shares for calculating diluted EPS 60,015 ​ 60,230 ​ Net earnings per share: ​ ​ Basic $ 1.67 ​ $ 0.65 ​ Diluted $ 1.67 ​ $ 0.65 ​ ​

COMMITMENTS, CONTINGENCIES, AND

COMMITMENTS, CONTINGENCIES, AND GUARANTEES	3 Months Ended
	Mar. 27, 2021
COMMITMENTS, CONTINGENCIES, AND GUARANTEES
COMMITMENTS, CONTINGENCIES, AND GUARANTEES	E. COMMITMENTS, CONTINGENCIES, AND GUARANTEES We are self-insured for environmental impairment liability, including certain liabilities which are insured through a wholly owned subsidiary, Ardellis Insurance Ltd., a licensed captive insurance company. We own and operate a number of facilities throughout the United States that chemically treat lumber products. In connection with the ownership and operation of these and other real properties, and the disposal or treatment of hazardous or toxic substances, we may, under various federal, state, and local environmental laws, ordinances, and regulations, be potentially liable for removal and remediation costs, as well as other potential costs, damages, and expenses. Environmental reserves, calculated with no discount rate, have been established to cover remediation activities at wood preservation facilities in Stockertown, PA; Elizabeth City, NC; and Auburndale, FL. In addition, a reserve was established for our facility in Thornton, CA to remove certain lead containing materials which existed on the property at the time of purchase. On a consolidated basis, we have reserved approximately $1.9 million on March 27, 2021 and $2.0 million on March 28, 2020, respectively, representing the estimated costs to complete future remediation efforts. These amounts have not been reduced by an insurance receivable. In addition, on March 27, 2021, we were parties either as plaintiff or defendant to a number of lawsuits and claims arising through the normal course of our business. In the opinion of management, our consolidated financial statements will not be materially affected by the outcome of these contingencies and claims. On March 27, 2021, we had outstanding purchase commitments on commenced capital projects of approximately $41.3 million. We provide a variety of warranties for products we manufacture. Historically, warranty claims have not been material. We also distribute products manufactured by other companies, some of which are no longer in business. While we do not warrant these products, we have received claims as a distributor of these products when the manufacturer no longer exists or has the ability to pay. Historically, these costs have not had a material effect on our consolidated financial statements. As part of our operations, we supply building materials and labor to site-built construction projects or we jointly bid on contracts with framing companies for such projects. In some instances, we are required to post payment and performance bonds to ensure the products and installation services are completed in accordance with our contractual obligations. We have agreed to indemnify the surety for claims properly made against these bonds. As of March 27, 2021, we had approximately $27.0 million outstanding payment and performance bonds for open projects. We had approximately $4.0 million in payment and performance bonds outstanding for completed projects which are still under warranty. On March 27, 2021, we had outstanding letters of credit totaling $50.9 million, primarily related to certain insurance contracts and industrial development revenue bonds described further below. In lieu of cash deposits, we provide irrevocable letters of credit in favor of our insurers to guarantee our performance under certain insurance contracts. As of March 27, 2021, we have irrevocable letters of credit outstanding totaling approximately $43.8 million for these types of insurance arrangements. We have reserves recorded on our balance sheet, in accrued liabilities, that reflect our expected future liabilities under these insurance arrangements. We are required to provide irrevocable letters of credit in favor of the bond trustees for all industrial development revenue bonds that have been issued. These letters of credit guarantee principal and interest payments to the bondholders. We currently have irrevocable letters of credit outstanding totaling approximately $7.1 million related to our outstanding industrial development revenue bonds. These letters of credit have varying terms but may be renewed at the option of the issuing banks. Certain wholly owned domestic subsidiaries have guaranteed the indebtedness of UFP Industries, Inc. in certain debt agreements, including the Series 2012, 2018 and 2020 Senior Notes and our revolving credit facility. The maximum exposure of these guarantees is limited to the indebtedness outstanding under these debt arrangements and this exposure will expire concurrent with the expiration of the debt agreements. We did not enter into any new guarantee arrangements during the first quarter of 2021 which would require us to recognize a liability on our balance sheet. ​

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	3 Months Ended
	Mar. 27, 2021
BUSINESS COMBINATIONS
BUSINESS COMBINATIONS	F. BUSINESS COMBINATIONS We completed the following acquisitions in 2021 and since the end of March 2020, which were accounted for using the purchase method in thousands unless otherwise noted: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net ​ Company Acquisition ​ Intangible Tangible Operating Name Date Purchase Price Assets Assets Segment ​ March 1, 2021 $4,724 $ 4,176 $ 548 Other J.C. Gilmore Pty Ltd (Gilmores) Founded in 1988 and operating from its distribution facility in Port Melbourne, Australia, Gilmores is a leading distributor in the industrial and construction industries of packaging tapes, stretch films, packaging equipment, strapping, construction protection products and other items, with 2020 sales of $15 million AUD ($10 million USD). ​ December 28, 2020 $258,770 $ 82,546 $ 176,224 Retail/Industrial PalletOne, Inc. (PalletOne) Based in Bartow, Florida, PalletOne is a leading manufacturer of new pallets in the U.S., with 17 pallet manufacturing facilities in the southern and eastern regions of the country. The company also supplies other specialized industrial packaging, including custom bins and crates, and its Sunbelt Forest Products (Sunbelt) subsidiary operates five pressure-treating facilities in the Southeastern U.S. PalletOne and its affiliates had 2019 and 2020 sales of ​ November 10, 2020 $27,274 $ 17,894 $ 9,380 Construction Atlantic Prefab, Inc.; Exterior Designs, LLC; and Patriot Building Systems, LLC Based in Wilton, New Hampshire, Atlantic Prefab produces prefabricated steel wall panels and light gauge metal trusses. The company’s steel component and prefinished wall panel lines are new, value-added product additions for UFP Construction that help shorten project timelines. Exterior Designs is a leading installer of siding and exterior cladding such as fiber cement, ACM (aluminum composite material) panels, phenolic panels, and EIFS (exterior insulation and finish systems). The company is based in Londonderry, New Hampshire, and serves commercial and multi-family clients throughout the Northeast. Also based in Londonderry, Patriot Building Systems provides commercial and multi-family framing services in the Northeast and will focus on markets not currently served by companies of UFP Industries. The companies had combined annual sales of approximately $28 million. ​ October 1, 2020 $7,936 $ 7,222 $ 714 Retail Fire Retardant Chemical Technologies, LLC (FRCT) Founded in 2014 and based in Matthews, North Carolina, FRCT’s business includes a research and development laboratory specializing in developing and testing a wide range of high-performance chemicals, including fire retardants and water repellants. The company had annual sales of approximately $6.4 million. ​ September 30, 2020 $4,465 $ 4,607 $ (142) Other Enwrap Logistic & Packaging S.r.l. (Enwrap) Enwrap is a newly formed company dedicated to the logistics and packaging business of its predecessor, Job Service S.p.A. Headquartered in Milan, Italy, Enwrap provides high-value, mixed material industrial packaging and logistics services through eight locations in Italy. These locations generated annual sales of approximately $14 million. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net ​ Company Acquisition ​ Intangible Tangible Operating Name Date Purchase Price Assets Assets Segment ​ July 14, 2020 $19,136 $ 13,098 $ 6,038 Industrial T&R Lumber Company ("T&R") A manufacturer and distributor of a range of products used primarily by nurseries, including plastic growing containers, pots and trays; wooden stakes; trellises; tree boxes; shipping racks; and other nursery supplies based in Rancho Cucamonga, California. T&R had annual sales of approximately $31 million. The acquisition of T&R will allow us to leverage their expertise using our national manufacturing capacity to grow our agricultural product offerings and customer base across the country. ​ The intangible assets for the above acquisitions have not been finalized and allocated to their respective identifiable asset and goodwill accounts. In aggregate, acquisitions completed since the end of March 2020 and not consolidated with other operations contributed approximately $242.8 million in net sales and $14.2 million in operating profits during the first quarter of 2021.

SEGMENT REPORTING

SEGMENT REPORTING	3 Months Ended
	Mar. 27, 2021
SEGMENT REPORTING
SEGMENT REPORTING	G. SEGMENT REPORTING The Company operates manufacturing, treating and distribution facilities internationally, but primarily in the United States. The business segments align with the following markets: UFP Retail Solutions, UFP Construction and UFP Industrial. The Company manages the operations of its individual locations primarily through a market-centered reporting structure under which each location is included in a business unit and business units are included in our Retail, Industrial, and Construction segments. In the case of locations which serve multiple segments, results are allocated and accounted for by segment. The exception to this market-centered reporting and management structure is the Company’s International segment, which comprises our Mexico, Canada, and Australia operations and sales and buying offices in other parts of the world. Our International segment and Ardellis (our insurance captive) have been included in the “All Other” column of the table below. The “Corporate” column includes purchasing, transportation and administrative functions that serve our operating segments. Operating results of Corporate primarily consists of over (under) allocated costs. The operating results of UFP Real Estate, Inc., which owns and leases real estate, and UFP Transportation Ltd., which owns and leases transportation equipment, are also included in the Corporate column. An inter-company lease charge is assessed to our operating segments for the use of these assets at fair market value rates. Total assets of the Corporate column include unallocated cash and cash equivalents, certain prepaid assets, certain property, equipment and other assets pertaining to the centralized activities of Corporate, UFP Real Estate, Inc., and UFP Transportation Ltd. The tables below are presented in thousands: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 27, 2021 ​ Retail Industrial Construction All Other Corporate Total Net sales to outside customers ​ $ 759,021 $ 448,874 ​ $ 559,530 ​ $ 55,577 ​ $ 2,002 ​ $ 1,825,004 Intersegment net sales ​ 47,586 ​ ​ 17,906 ​ ​ 14,461 ​ ​ 97,396 ​ ​ (177,349) ​ — Segment operating profit ​ ​ 53,545 ​ ​ 40,410 ​ ​ 33,018 ​ ​ 7,978 ​ ​ 2,536 ​ ​ 137,487 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 28, 2020 ​ Retail Industrial Construction All Other Corporate Total Net sales to outside customers ​ $ 352,161 $ 256,543 ​ $ 381,155 ​ $ 42,392 ​ $ (189) ​ $ 1,032,062 Intersegment net sales ​ 29,858 ​ ​ 11,220 ​ ​ 15,423 ​ ​ 53,167 ​ ​ (109,668) ​ — Segment operating profit ​ ​ 15,512 ​ ​ 18,074 ​ ​ 17,135 ​ ​ 4,739 ​ ​ 3,172 ​ ​ 58,632 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The following table presents goodwill by segment as of March 27, 2021, and December 26, 2020 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Retail Industrial Construction All Other Corporate Total Balance as of December 26, 2020 $ 61,943 $ 87,827 $ 90,729 $ 11,694 ​ $ — $ 252,193 2021 Acquisitions ​ 18,178 ​ ​ 43,844 ​ ​ — ​ ​ 4,176 ​ ​ — ​ 66,198 2021 Purchase Accounting Adjustments ​ ​ — ​ ​ (2,291) ​ ​ (1,653) ​ ​ (145) ​ ​ — ​ ​ (4,089) Foreign Exchange, Net ​ — ​ ​ — ​ ​ ​ ​ ​ (113) ​ ​ — ​ (113) Balance as of March 27, 2021 ​ $ 80,121 $ 129,380 ​ $ 89,076 ​ $ 15,612 ​ $ — ​ $ 314,189 ​ The following table presents total assets by segment as of March 27, 2021, and December 26, 2020 (in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Assets by Segment ​ March 27, December 26, ​ ​ Segment Classification 2021 ​ 2020 ​ % Change Retail $ 944,637 ​ $ 510,464 85.1 % Industrial 657,572 ​ 416,487 57.9 ​ Construction 535,527 ​ 510,972 4.8 ​ All Other ​ 214,815 ​ ​ 196,856 ​ 9.1 ​ Corporate ​ 433,537 ​ ​ 770,112 ​ (43.7) ​ Total Assets $ 2,786,088 ​ $ 2,404,891 15.9 % ​

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 27, 2021
INCOME TAXES
INCOME TAXES	H. INCOME TAXES Effective tax rates differ from statutory federal income tax rates, primarily due to provisions for foreign, state and local income taxes and permanent tax differences. Our effective tax rate was 23.3% in the first quarter of 2021 compared to 24.7% for same period in 2020. ​

COMMON STOCK

COMMON STOCK	3 Months Ended
	Mar. 27, 2021
COMMON STOCK
COMMON STOCK	I. COMMON STOCK Below is a summary of common stock issuances for the first three months of 2021 and 2020 (in thousands, except average share price): ​ ​ ​ ​ ​ ​ ​ March 27, 2021 Share Issuance Activity Common Stock ​ ​ Average Share Price Shares issued under the employee stock purchase plan ​ 6 ​ $ 73.28 ​ ​ ​ ​ ​ ​ Shares issued under the employee stock gift program ​ 1 ​ ​ 79.91 Shares issued under the director retainer stock program ​ 2 ​ ​ 56.80 Shares issued under the bonus plan ​ 468 ​ ​ 53.68 Shares issued under the executive stock match grants plan ​ 77 ​ ​ 60.24 Forfeitures ​ (11) ​ ​ ​ Total shares issued under stock grant programs ​ 537 ​ $ 54.63 ​ ​ ​ ​ ​ ​ Shares issued under the deferred compensation plans ​ 89 ​ $ 59.75 ​ ​ ​ ​ ​ ​ ​ ​ ​ March 28, 2020 Share Issuance Activity Common Stock ​ ​ Average Share Price Shares issued under the employee stock purchase plan ​ 10 ​ $ 35.59 ​ ​ ​ ​ ​ ​ Shares issued under the employee stock gift program ​ 1 ​ ​ 45.22 Shares issued under the director retainer stock program ​ 1 ​ ​ 47.90 Shares issued under the bonus plan ​ 271 ​ ​ 47.51 Shares issued under the executive stock match grants plan ​ 80 ​ ​ 47.60 Forfeitures ​ (3) ​ ​ ​ Total shares issued under stock grant programs ​ 350 ​ $ 47.52 ​ ​ ​ ​ ​ ​ Shares issued under the deferred compensation plans ​ 89 ​ $ 54.68 ​ During the first three months of 2021, we did not repurchase any of our shares of common stock. ​ During the first three months of 2020, we repurchased approximately 756,000 shares of our common stock at an average share price of $38.62.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	3 Months Ended
	Mar. 27, 2021
SUBSEQUENT EVENTS
Subsequent Events	J. SUBSEQUENT EVENTS On April 12, 2021, Sunbelt Forest Products Corporation, a wholly owned subsidiary, closed on its agreement to purchase the net operating assets of Spartanburg Forest Products, Inc. and its affiliates. The purchase price for Spartanburg’s property, plant and equipment is approximately $16.5 million. Sunbelt also purchased Spartanburg’s net working capital for an amount equal to the net book value determined on the date of closing, which totaled approximately $146.5 million. Spartanburg and its affiliates are a wood treating operation in the southeastern U.S., with approximately 150 employees and operations in five states. On April 19, 2021, UFP Craft and Hobby, LLC, a wholly owned subsidiary, closed on its agreement to purchase the net operating assets of Walnut Hollow Farm, Inc., for $8.7 million. Walnut Hollow Farm, located in Wisconsin, is engaged in the business of designing, manufacturing, selling, and distributing wood products, tools, and accessories for the craft and hobby, outdoor sportsman art, personalized home décor, and hardware categories. On April 29, 2021, UFP Construction, LLC, a wholly owned subsidiary, closed on its agreement to purchase the net operating assets of Endurable Building Products, LLC for $10.5 million. Endurable Building Products, based near Minneapolis, Minnesota, is a leading manufacturer of customized structural aluminum systems and products for exterior purposes, such as deck framing, balconies, sunshades, railings and stairs.

BASIS OF PRESENTATION (Policies

BASIS OF PRESENTATION (Policies)	3 Months Ended
	Mar. 27, 2021
BASIS OF PRESENTATION
Revenue Recognition	Within the three primary segments (Retail, Industrial, and Construction) that the Company operates, there are a variety of written agreements governing the sale of our products and services. The transaction price is stated at the purchase order level, which includes shipping and/or freight costs and any applicable governmental authority taxes. The majority of our contracts have a single performance obligation concentrated around the delivery of goods to the carrier, Free On Board (FOB) shipping point. Therefore, revenue is recognized when this performance obligation is satisfied. Generally, title and control passes at the time of shipment. In certain circumstances, the customer takes title when the shipment arrives at the destination. However, our shipping process is typically completed the same day. Certain customer products that we provide require installation by the Company or a 3 rd rd The Company utilizes rebates, credits, discounts and/or cash-based incentives with certain customers which are accounted for as variable consideration. We estimate these amounts based on the expected amount to be provided to customers and reduce revenues recognized. We believe that there will not be significant changes to our estimates of variable consideration. The allocation of these costs are applied at the invoice level and recognized in conjunction with revenue. Additionally, returns and refunds are estimated on a historical and expected basis which is a reduction of revenue recognized. Earnings on construction contracts are reflected in operations using over time accounting, under either cost to cost or units of delivery methods, depending on the nature of the business at individual operations, which is in accordance with ASC 606 as revenue is recognized when certain performance obligations are performed. Under over time accounting using the cost to cost method, revenues and related earnings on construction contracts are measured by the relationships of actual costs incurred related to the total estimated costs. Under over time accounting using the units of delivery method, revenues and related earnings on construction contracts are measured by the relationships of actual units produced related to the total number of units. Revisions in earnings estimates on the construction contracts are recorded in the accounting period in which the basis for such revisions becomes known. Projected losses on individual contracts are charged to operations in their entirety when such losses become apparent. Our construction contracts are generally entered into with a fixed price and completion of the projects can range from 6

FAIR VALUE (Tables)

FAIR VALUE (Tables)	3 Months Ended
	Mar. 27, 2021
FAIR VALUE
Assets measured at fair value	Assets measured at fair value are as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 27, 2021 ​ March 28, 2020 ​ ​ Quoted ​ Prices with ​ ​ ​ ​ ​ ​ ​ Quoted ​ Prices with ​ ​ ​ ​ ​ ​ ​ ​ Prices in ​ Other ​ ​ Prices with ​ ​ ​ ​ Prices in ​ Other ​ ​ Prices with ​ ​ ​ ​ ​ Active ​ Observable ​ ​ Unobservable ​ ​ ​ ​ Active ​ Observable ​ ​ Unobservable ​ ​ ​ ​ ​ Markets ​ Inputs ​ ​ Inputs ​ ​ ​ ​ Markets ​ Inputs ​ ​ Inputs ​ ​ ​ ​ (Level 1) (Level 2) ​ (Level 3) ​ Total (Level 1) (Level 2) ​ (Level 3) Total Money market funds ​ $ 19 $ 1,127 ​ $ — $ 1,146 $ 29,561 $ 837 ​ $ — $ 30,398 Fixed income funds ​ 244 ​ 16,264 ​ ​ — 16,508 ​ 237 ​ 15,124 ​ ​ — 15,361 Equity securities ​ 18,496 ​ — ​ ​ — 18,496 ​ 9,089 ​ — ​ ​ — 9,089 Alternative investments ​ ​ — ​ ​ — ​ ​ 2,126 ​ ​ 2,126 ​ ​ — ​ ​ — ​ ​ 1,960 ​ ​ 1,960 Mutual funds: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Domestic stock funds ​ 9,388 ​ — ​ ​ — 9,388 ​ 5,204 ​ — ​ ​ — 5,204 International stock funds ​ 1,395 ​ — ​ ​ — 1,395 ​ 947 ​ — ​ ​ — 947 Target funds ​ 21 ​ — ​ ​ — 21 ​ 242 ​ — ​ ​ — 242 Bond funds ​ 145 ​ — ​ ​ — 145 ​ 222 ​ — ​ ​ — 222 Alternative funds ​ ​ 496 ​ ​ — ​ ​ — ​ ​ 496 ​ ​ 921 ​ ​ — ​ ​ — ​ ​ 921 Total mutual funds ​ 11,445 ​ — ​ ​ — 11,445 ​ 7,536 ​ — ​ ​ — 7,536 Total ​ $ 30,204 ​ $ 17,391 ​ $ 2,126 ​ $ 49,721 ​ $ 46,423 ​ $ 15,961 ​ $ 1,960 ​ $ 64,344 Assets at fair value ​ $ 30,204 ​ $ 17,391 ​ $ 2,126 $ 49,721 ​ $ 46,423 ​ $ 15,961 ​ $ 1,960 $ 64,344
Available for sale investment portfolio	Ardellis’ available for sale investment portfolio, including funds held with the State of Michigan, consists of the following (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 27, 2021 ​ March 28, 2020 ​ ​ ​ ​ ​ Unrealized ​ ​ ​ ​ ​ ​ ​ Unrealized ​ ​ ​ ​ Cost Gain/(Loss) Fair Value Cost Gain/(Loss) Fair Value Fixed Income ​ $ 15,867 $ 642 $ 16,509 ​ $ 15,257 $ 104 $ 15,361 Equity ​ 14,664 ​ 3,832 18,496 ​ 9,690 ​ (601) 9,089 Mutual Funds ​ ​ 8,769 ​ ​ 2,049 ​ 10,818 ​ ​ 7,298 ​ ​ (569) ​ 6,729 Alternative Investments ​ ​ 1,929 ​ ​ 197 ​ 2,126 ​ ​ 1,834 ​ ​ 126 ​ 1,960 Total ​ $ 41,229 ​ $ 6,720 $ 47,949 ​ $ 34,079 ​ $ (940) $ 33,139

REVENUE RECOGNITION (Tables)

REVENUE RECOGNITION (Tables)	3 Months Ended
	Mar. 27, 2021
REVENUE RECOGNITION
Schedule of Disaggregation of revenue	The following table presents our net sales disaggregated by revenue source (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 27, March 28, ​ ​ ​ 2021 ​ 2020 ​ % Change FOB Shipping Point Revenue ​ $ 1,797,399 ​ $ 999,262 79.9% Construction Contract Revenue ​ 27,605 ​ ​ 32,800 (15.8)% Total Net Sales ​ $ 1,825,004 ​ $ 1,032,062 76.8%
Schedule of percentage-of-completion balances	The following table presents the balances of over time accounting accounts which are included in “Other current assets” and “Accrued liabilities: Other”, respectively (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ March 27, ​ December 26, ​ March 28, ​ ​ 2021 2020 2020 Cost and Earnings in Excess of Billings ​ $ 3,408 $ 4,169 $ 5,744 Billings in Excess of Cost and Earnings ​ 9,396 ​ 11,530 9,920 ​

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	3 Months Ended
	Mar. 27, 2021
EARNINGS PER SHARE
Schedule of Computation of earnings per share	The computation of earnings per share (“EPS”) is as follows (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ March 27, March 28, ​ 2021 ​ 2020 ​ Numerator: ​ ​ Net earnings attributable to controlling interest $ 103,311 ​ $ 40,159 ​ Adjustment for earnings allocated to non-vested restricted common stock (3,175) ​ (1,059) ​ Net earnings for calculating EPS $ 100,136 ​ $ 39,100 ​ Denominator: ​ ​ Weighted average shares outstanding 61,889 ​ 61,842 ​ Adjustment for non-vested restricted common stock (1,902) ​ (1,630) ​ Shares for calculating basic EPS 59,987 ​ 60,212 ​ Effect of dilutive restricted common stock 28 ​ 18 ​ Shares for calculating diluted EPS 60,015 ​ 60,230 ​ Net earnings per share: ​ ​ Basic $ 1.67 ​ $ 0.65 ​ Diluted $ 1.67 ​ $ 0.65 ​

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	3 Months Ended
	Mar. 27, 2021
BUSINESS COMBINATIONS
Business Acquisitions Accounted for Using Purchase Method	We completed the following acquisitions in 2021 and since the end of March 2020, which were accounted for using the purchase method in thousands unless otherwise noted: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net ​ Company Acquisition ​ Intangible Tangible Operating Name Date Purchase Price Assets Assets Segment ​ March 1, 2021 $4,724 $ 4,176 $ 548 Other J.C. Gilmore Pty Ltd (Gilmores) Founded in 1988 and operating from its distribution facility in Port Melbourne, Australia, Gilmores is a leading distributor in the industrial and construction industries of packaging tapes, stretch films, packaging equipment, strapping, construction protection products and other items, with 2020 sales of $15 million AUD ($10 million USD). ​ December 28, 2020 $258,770 $ 82,546 $ 176,224 Retail/Industrial PalletOne, Inc. (PalletOne) Based in Bartow, Florida, PalletOne is a leading manufacturer of new pallets in the U.S., with 17 pallet manufacturing facilities in the southern and eastern regions of the country. The company also supplies other specialized industrial packaging, including custom bins and crates, and its Sunbelt Forest Products (Sunbelt) subsidiary operates five pressure-treating facilities in the Southeastern U.S. PalletOne and its affiliates had 2019 and 2020 sales of ​ November 10, 2020 $27,274 $ 17,894 $ 9,380 Construction Atlantic Prefab, Inc.; Exterior Designs, LLC; and Patriot Building Systems, LLC Based in Wilton, New Hampshire, Atlantic Prefab produces prefabricated steel wall panels and light gauge metal trusses. The company’s steel component and prefinished wall panel lines are new, value-added product additions for UFP Construction that help shorten project timelines. Exterior Designs is a leading installer of siding and exterior cladding such as fiber cement, ACM (aluminum composite material) panels, phenolic panels, and EIFS (exterior insulation and finish systems). The company is based in Londonderry, New Hampshire, and serves commercial and multi-family clients throughout the Northeast. Also based in Londonderry, Patriot Building Systems provides commercial and multi-family framing services in the Northeast and will focus on markets not currently served by companies of UFP Industries. The companies had combined annual sales of approximately $28 million. ​ October 1, 2020 $7,936 $ 7,222 $ 714 Retail Fire Retardant Chemical Technologies, LLC (FRCT) Founded in 2014 and based in Matthews, North Carolina, FRCT’s business includes a research and development laboratory specializing in developing and testing a wide range of high-performance chemicals, including fire retardants and water repellants. The company had annual sales of approximately $6.4 million. ​ September 30, 2020 $4,465 $ 4,607 $ (142) Other Enwrap Logistic & Packaging S.r.l. (Enwrap) Enwrap is a newly formed company dedicated to the logistics and packaging business of its predecessor, Job Service S.p.A. Headquartered in Milan, Italy, Enwrap provides high-value, mixed material industrial packaging and logistics services through eight locations in Italy. These locations generated annual sales of approximately $14 million. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Net ​ Company Acquisition ​ Intangible Tangible Operating Name Date Purchase Price Assets Assets Segment ​ July 14, 2020 $19,136 $ 13,098 $ 6,038 Industrial T&R Lumber Company ("T&R") A manufacturer and distributor of a range of products used primarily by nurseries, including plastic growing containers, pots and trays; wooden stakes; trellises; tree boxes; shipping racks; and other nursery supplies based in Rancho Cucamonga, California. T&R had annual sales of approximately $31 million. The acquisition of T&R will allow us to leverage their expertise using our national manufacturing capacity to grow our agricultural product offerings and customer base across the country.

SEGMENT REPORTING (Tables)

SEGMENT REPORTING (Tables)	3 Months Ended
	Mar. 27, 2021
SEGMENT REPORTING
Segment Reporting	The tables below are presented in thousands: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 27, 2021 ​ Retail Industrial Construction All Other Corporate Total Net sales to outside customers ​ $ 759,021 $ 448,874 ​ $ 559,530 ​ $ 55,577 ​ $ 2,002 ​ $ 1,825,004 Intersegment net sales ​ 47,586 ​ ​ 17,906 ​ ​ 14,461 ​ ​ 97,396 ​ ​ (177,349) ​ — Segment operating profit ​ ​ 53,545 ​ ​ 40,410 ​ ​ 33,018 ​ ​ 7,978 ​ ​ 2,536 ​ ​ 137,487 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended March 28, 2020 ​ Retail Industrial Construction All Other Corporate Total Net sales to outside customers ​ $ 352,161 $ 256,543 ​ $ 381,155 ​ $ 42,392 ​ $ (189) ​ $ 1,032,062 Intersegment net sales ​ 29,858 ​ ​ 11,220 ​ ​ 15,423 ​ ​ 53,167 ​ ​ (109,668) ​ — Segment operating profit ​ ​ 15,512 ​ ​ 18,074 ​ ​ 17,135 ​ ​ 4,739 ​ ​ 3,172 ​ ​ 58,632 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
Schedule of Goodwill by Segment	The following table presents goodwill by segment as of March 27, 2021, and December 26, 2020 (in thousands): ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Retail Industrial Construction All Other Corporate Total Balance as of December 26, 2020 $ 61,943 $ 87,827 $ 90,729 $ 11,694 ​ $ — $ 252,193 2021 Acquisitions ​ 18,178 ​ ​ 43,844 ​ ​ — ​ ​ 4,176 ​ ​ — ​ 66,198 2021 Purchase Accounting Adjustments ​ ​ — ​ ​ (2,291) ​ ​ (1,653) ​ ​ (145) ​ ​ — ​ ​ (4,089) Foreign Exchange, Net ​ — ​ ​ — ​ ​ ​ ​ ​ (113) ​ ​ — ​ (113) Balance as of March 27, 2021 ​ $ 80,121 $ 129,380 ​ $ 89,076 ​ $ 15,612 ​ $ — ​ $ 314,189
Schedule of assets by segment	The following table presents total assets by segment as of March 27, 2021, and December 26, 2020 (in thousands). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Total Assets by Segment ​ March 27, December 26, ​ ​ Segment Classification 2021 ​ 2020 ​ % Change Retail $ 944,637 ​ $ 510,464 85.1 % Industrial 657,572 ​ 416,487 57.9 ​ Construction 535,527 ​ 510,972 4.8 ​ All Other ​ 214,815 ​ ​ 196,856 ​ 9.1 ​ Corporate ​ 433,537 ​ ​ 770,112 ​ (43.7) ​ Total Assets $ 2,786,088 ​ $ 2,404,891 15.9 %

COMMON STOCK (Tables)

COMMON STOCK (Tables)	3 Months Ended
	Mar. 27, 2021
COMMON STOCK
Schedule of common stock issuances	Below is a summary of common stock issuances for the first three months of 2021 and 2020 (in thousands, except average share price): ​ ​ ​ ​ ​ ​ ​ March 27, 2021 Share Issuance Activity Common Stock ​ ​ Average Share Price Shares issued under the employee stock purchase plan ​ 6 ​ $ 73.28 ​ ​ ​ ​ ​ ​ Shares issued under the employee stock gift program ​ 1 ​ ​ 79.91 Shares issued under the director retainer stock program ​ 2 ​ ​ 56.80 Shares issued under the bonus plan ​ 468 ​ ​ 53.68 Shares issued under the executive stock match grants plan ​ 77 ​ ​ 60.24 Forfeitures ​ (11) ​ ​ ​ Total shares issued under stock grant programs ​ 537 ​ $ 54.63 ​ ​ ​ ​ ​ ​ Shares issued under the deferred compensation plans ​ 89 ​ $ 59.75 ​ ​ ​ ​ ​ ​ ​ ​ March 28, 2020 Share Issuance Activity Common Stock ​ ​ Average Share Price Shares issued under the employee stock purchase plan ​ 10 ​ $ 35.59 ​ ​ ​ ​ ​ ​ Shares issued under the employee stock gift program ​ 1 ​ ​ 45.22 Shares issued under the director retainer stock program ​ 1 ​ ​ 47.90 Shares issued under the bonus plan ​ 271 ​ ​ 47.51 Shares issued under the executive stock match grants plan ​ 80 ​ ​ 47.60 Forfeitures ​ (3) ​ ​ ​ Total shares issued under stock grant programs ​ 350 ​ $ 47.52 ​ ​ ​ ​ ​ ​ Shares issued under the deferred compensation plans ​ 89 ​ $ 54.68

FAIR VALUE - Asset Measured at

FAIR VALUE - Asset Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Mar. 28, 2020
Money market funds | Cash and Cash Equivalents
Fair Value
Investments at fair value	$ 500
Money market funds | Restricted Investments
Fair Value
Investments at fair value	300
Fixed Income | Restricted Investments
Fair Value
Investments at fair value	16,900
Mutual funds, equity and alternative investments | Investments
Fair Value
Investments at fair value	31,400
Money market and mutual funds | Other Assets
Fair Value
Investments at fair value	600
Ardellis Insurance Ltd.
Fair Value
Total Fair Value	47,949	$ 33,139
Estimate of Fair Value Measurement | Recurring
Fair Value
Investments at fair value	49,721	64,344
Assets at fair value	49,721	64,344
Estimate of Fair Value Measurement | Recurring | Money market funds
Fair Value
Investments at fair value	1,146	30,398
Estimate of Fair Value Measurement | Recurring | Fixed Income
Fair Value
Investments at fair value	16,508	15,361
Estimate of Fair Value Measurement | Recurring | Equity
Fair Value
Investments at fair value	18,496	9,089
Estimate of Fair Value Measurement | Recurring | Alternative Investments
Fair Value
Investments at fair value	2,126	1,960
Estimate of Fair Value Measurement | Recurring | Mutual Fund
Fair Value
Investments at fair value	11,445	7,536
Estimate of Fair Value Measurement | Recurring | Domestic stock
Fair Value
Investments at fair value	9,388	5,204
Estimate of Fair Value Measurement | Recurring | International stock funds
Fair Value
Investments at fair value	1,395	947
Estimate of Fair Value Measurement | Recurring | Target funds
Fair Value
Investments at fair value	21	242
Estimate of Fair Value Measurement | Recurring | Bond funds
Fair Value
Investments at fair value	145	222
Estimate of Fair Value Measurement | Recurring | Alternative funds
Fair Value
Investments at fair value	496	921
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1)
Fair Value
Investments at fair value	30,204	46,423
Assets at fair value	30,204	46,423
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Money market funds
Fair Value
Investments at fair value	19	29,561
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Fixed Income
Fair Value
Investments at fair value	244	237
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Equity
Fair Value
Investments at fair value	18,496	9,089
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Mutual Fund
Fair Value
Investments at fair value	11,445	7,536
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Domestic stock
Fair Value
Investments at fair value	9,388	5,204
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | International stock funds
Fair Value
Investments at fair value	1,395	947
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Target funds
Fair Value
Investments at fair value	21	242
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Bond funds
Fair Value
Investments at fair value	145	222
Estimate of Fair Value Measurement | Recurring | Quoted Prices in Active Markets (Level 1) | Alternative funds
Fair Value
Investments at fair value	496	921
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2)
Fair Value
Investments at fair value	17,391	15,961
Assets at fair value	17,391	15,961
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Money market funds
Fair Value
Investments at fair value	1,127	837
Estimate of Fair Value Measurement | Recurring | Prices with Other Observable Inputs (Level 2) | Fixed Income
Fair Value
Investments at fair value	16,264	15,124
Estimate of Fair Value Measurement | Recurring | Prices with Unobservable Inputs (Level 3)
Fair Value
Investments at fair value	2,126	1,960
Assets at fair value	2,126	1,960
Estimate of Fair Value Measurement | Recurring | Prices with Unobservable Inputs (Level 3) | Alternative Investments
Fair Value
Investments at fair value	$ 2,126	$ 1,960

FAIR VALUE - Available for Sale

FAIR VALUE - Available for Sale Investment Portfolio (Details) - Ardellis Insurance Ltd. - USD ($) $ in Thousands	Mar. 27, 2021	Mar. 28, 2020
Available-for-sale securities
Total Securities Cost	$ 41,229	$ 34,079
Unrealized Gain (Loss)	6,720	(940)
Total Fair Value	47,949	33,139
Fixed Income
Available-for-sale securities
Debt Securities Cost	15,867	15,257
Debt Securities Unrealized Gain/(Loss)	642	104
Debt Securities Fair Value	16,509	15,361
Equity
Available-for-sale securities
Equity Securities Cost	14,664	9,690
Equity Securities Unrealized Gain/(Loss)	3,832	(601)
Equity Securities Fair Value	18,496	9,089
Mutual Fund
Available-for-sale securities
Debt Securities Cost	8,769	7,298
Debt Securities Unrealized Gain/(Loss)		(569)
Debt Securities Unrealized Gain/(Loss)	2,049
Debt Securities Fair Value	10,818	6,729
Alternative Investments
Available-for-sale securities
Debt Securities Cost	1,929	1,834
Debt Securities Unrealized Gain/(Loss)	197	126
Debt Securities Fair Value	$ 2,126	$ 1,960

REVENUE RECOGNITION - Disaggreg

REVENUE RECOGNITION - Disaggregated revenue (Details) $ in Thousands	3 Months Ended
	Mar. 27, 2021USD ($)item	Mar. 28, 2020USD ($)
Revenue Recognition
Number of markets in which the entity operates (in markets) | item	3
NET SALES	$ 1,825,004	$ 1,032,062
Change %	76.80%
FOB Shipping Point Revenue
Revenue Recognition
NET SALES	$ 1,797,399	999,262
Change %	79.90%
Construction Contract Revenue
Revenue Recognition
NET SALES	$ 27,605	$ 32,800
Change %	(15.80%)
Minimum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-28 | Construction Contract Revenue
Revenue Recognition
Number of months to complete contract projects	6 months
Maximum | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-03-28 | Construction Contract Revenue
Revenue Recognition
Number of months to complete contract projects	18 months

REVENUE RECOGNITION - Percentag

REVENUE RECOGNITION - Percentage of completion (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020	Mar. 28, 2020
REVENUE RECOGNITION
Cost and Earnings in Excess of Billings	$ 3,408	$ 4,169	$ 5,744
Billings in Excess of Cost and Earnings	$ 9,396	$ 11,530	$ 9,920

EARNINGS PER SHARE (Details)

EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Numerator:
Net earnings attributable to controlling interest	$ 103,311	$ 40,159
Adjustment for earnings allocated to non-vested restricted common stock	(3,175)	(1,059)
Net earnings for calculating EPS	$ 100,136	$ 39,100
Denominator:
Weighted average shares outstanding (in shares)	61,889	61,842
Adjustment for non-vested restricted common stock (in shares)	(1,902)	(1,630)
Shares for calculating basic EPS (in shares)	59,987	60,212
Effect of dilutive restricted common stock (in shares)	28	18
Shares for calculating diluted EPS (in shares)	60,015	60,230
Net earnings per share
Basic (USD per share)	$ 1.67	$ 0.65
Diluted (USD per share)	$ 1.67	$ 0.65

COMMITMENTS, CONTINGENCIES, A_2

COMMITMENTS, CONTINGENCIES, AND GUARANTEES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Remediation reserves
Environmental reserves, discount rate (as a percent)	0.00%
Estimated costs to complete future remediation efforts	$ 1.9	$ 2
Long-term commitment
Outstanding purchase commitments on capital projects	41.3
Surety Bonds and Letters of Credit
Outstanding letters of credit	50.9
Open Projects
Surety Bonds and Letters of Credit
Payment and performance bonds outstanding	27
Completed Projects
Surety Bonds and Letters of Credit
Payment and performance bonds outstanding	4
Insurance Contracts
Surety Bonds and Letters of Credit
Outstanding letters of credit	43.8
Revenue Bonds
Surety Bonds and Letters of Credit
Outstanding letters of credit	$ 7.1

BUSINESS COMBINATIONS (Details)

BUSINESS COMBINATIONS (Details) $ in Thousands, $ in Millions	Mar. 01, 2021USD ($)	Mar. 01, 2021AUD ($)	Dec. 28, 2020USD ($)facility	Nov. 10, 2020USD ($)	Oct. 01, 2020USD ($)	Sep. 30, 2020USD ($)location	Jul. 14, 2020USD ($)	Mar. 27, 2021USD ($)
Business Acquisition
Aggregate acquisitions' net sales								$ 242,800
Aggregate acquisitions' operating profit								$ 14,200
J. C. Gilmore Pty Ltd | All Other
Business Acquisition
Purchase Price	$ 4,724
Percentage of assets purchased (as a percent)	100.00%
Intangible Assets	$ 4,176
Net Tangible Assets	548
Acquired entity, prior year sales	$ 10,000	$ 15
PalletOne | Industrial
Business Acquisition
Purchase Price			$ 258,770
Percentage of stock purchase (as a percent)			100.00%
Intangible Assets			$ 82,546
Net Tangible Assets			176,224
Acquired entity, prior year sales			525,000
Acquired entity, trailing 12-months sales			$ 698,000
Number of pallet manufacturing facilities | facility			17
Number of pressure-treating facilities | facility			5
Atlantic Prefab, Inc., Exterior Designs, LLC and Patriot Building Systems, LLC | Construction
Business Acquisition
Purchase Price				$ 27,274
Percentage of assets purchased (as a percent)				100.00%
Intangible Assets				$ 17,894
Net Tangible Assets				9,380
Acquired entity, prior year sales				$ 28,000
FRCT | Retail
Business Acquisition
Purchase Price					$ 7,936
Percentage of assets purchased (as a percent)					100.00%
Intangible Assets					$ 7,222
Net Tangible Assets					714
Acquired entity, prior year sales					$ 6,400
Enwrap | All Other
Business Acquisition
Purchase Price						$ 4,465
Percentage of stock purchase (as a percent)						50.00%
Number of plant locations | location						8
Intangible Assets						$ 4,607
Net Tangible Assets						(142)
Acquired entity, prior year sales						$ 14,000
T&R Lumber Company | Industrial
Business Acquisition
Purchase Price							$ 19,136
Percentage of assets purchased (as a percent)							100.00%
Intangible Assets							$ 13,098
Net Tangible Assets							6,038
Acquired entity, prior year sales							$ 31,000

SEGMENT REPORTING (Details)

SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Dec. 26, 2020
Segment Reporting
Net sales	$ 1,825,004	$ 1,032,062
Segment operating profit	137,487	58,632
Segment total assets	2,786,088	1,882,982	$ 2,404,891
Intersegment net sales
Segment Reporting
Net sales	(177,349)	(109,668)
Corporate
Segment Reporting
Net sales	2,002	(189)
Segment operating profit	2,536	3,172
Segment total assets	433,537		770,112
Retail
Segment Reporting
Net sales	759,021	352,161
Segment operating profit	53,545	15,512
Segment total assets	944,637		510,464
Retail | Intersegment net sales
Segment Reporting
Net sales	47,586	29,858
Industrial
Segment Reporting
Net sales	448,874	256,543
Segment operating profit	40,410	18,074
Segment total assets	657,572		416,487
Industrial | Intersegment net sales
Segment Reporting
Net sales	17,906	11,220
Construction
Segment Reporting
Net sales	559,530	381,155
Segment operating profit	33,018	17,135
Segment total assets	535,527		510,972
Construction | Intersegment net sales
Segment Reporting
Net sales	14,461	15,423
All Other
Segment Reporting
Net sales	55,577	42,392
Segment operating profit	7,978	4,739
Segment total assets	214,815		$ 196,856
All Other | Intersegment net sales
Segment Reporting
Net sales	$ 97,396	$ 53,167

SEGMENT REPORTING - Goodwill (D

SEGMENT REPORTING - Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 27, 2021USD ($)
Goodwill
Goodwill, Beginning Balance	$ 252,193
Acquisitions	66,198
Purchase Accounting Adjustments	(4,089)
Foreign Exchange, Net	(113)
Goodwill, Ending Balance	314,189
Retail
Goodwill
Goodwill, Beginning Balance	61,943
Acquisitions	18,178
Goodwill, Ending Balance	80,121
Construction
Goodwill
Goodwill, Beginning Balance	90,729
Purchase Accounting Adjustments	(1,653)
Goodwill, Ending Balance	89,076
Industrial
Goodwill
Goodwill, Beginning Balance	87,827
Acquisitions	43,844
Purchase Accounting Adjustments	(2,291)
Goodwill, Ending Balance	129,380
All Other
Goodwill
Goodwill, Beginning Balance	11,694
Acquisitions	4,176
Purchase Accounting Adjustments	(145)
Foreign Exchange, Net	(113)
Goodwill, Ending Balance	$ 15,612

SEGMENT REPORTING - Assets (Det

SEGMENT REPORTING - Assets (Details) - USD ($) $ in Thousands	Mar. 27, 2021	Dec. 26, 2020	Mar. 28, 2020
Segment Reporting
Segment assets	$ 2,786,088	$ 2,404,891	$ 1,882,982
Change in assets (as a percent)	15.90%
Corporate
Segment Reporting
Segment assets	$ 433,537	770,112
Change in assets (as a percent)	(43.70%)
Retail
Segment Reporting
Segment assets	$ 944,637	510,464
Change in assets (as a percent)	85.10%
Construction
Segment Reporting
Segment assets	$ 535,527	510,972
Change in assets (as a percent)	4.80%
Industrial
Segment Reporting
Segment assets	$ 657,572	416,487
Change in assets (as a percent)	57.90%
All Other
Segment Reporting
Segment assets	$ 214,815	$ 196,856
Change in assets (as a percent)	9.10%

INCOME TAXES (Details)

INCOME TAXES (Details)	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
INCOME TAXES
Effective income tax rate	23.30%	24.70%

COMMON STOCK - Common Stock Iss

COMMON STOCK - Common Stock Issuances (Details) - $ / shares	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Common Stock
Repurchase of common stock		756,397
Average Share Price
Repurchase of common stock (dollars per share)		$ 38.62
Stock Purchase Plan
Common Stock
Common stock issued	6,000	10,000
Average Share Price
Common stock issued (dollars per share)	$ 73.28	$ 35.59
Stock Gift Program
Common Stock
Common stock issued	1,000	1,000
Average Share Price
Common stock issued (dollars per share)	$ 79.91	$ 45.22
Stock Retainer Plan
Common Stock
Common stock issued	2,000	1,000
Average Share Price
Common stock issued (dollars per share)	$ 56.80	$ 47.90
LTSIP
Common Stock
Common stock issued	468,000	271,000
Average Share Price
Common stock issued (dollars per share)	$ 53.68	$ 47.51
Executive Stock Match Grants
Common Stock
Common stock issued	77,000	80,000
Average Share Price
Common stock issued (dollars per share)	$ 60.24	$ 47.60
Deferred Compensation Plans
Common Stock
Common stock issued	89,000	89,000
Average Share Price
Common stock issued (dollars per share)	$ 59.75	$ 54.68
Stock grant programs
Common Stock
Common stock issued	537,000	350,000
Forfeitures	(11,000)	(3,000)
Average Share Price
Common stock issued (dollars per share)	$ 54.63	$ 47.52

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - Subsequent Event $ in Millions	Apr. 29, 2021USD ($)	Apr. 19, 2021USD ($)	Apr. 12, 2021USD ($)employeestate
Spartanburg Forest Products, Inc and its Affiliates
Subsequent Event
Property, plant and equipment			$ 16.5
Net working capital			$ 146.5
Number of Employees | employee			150
Number of states in which the entity operates | state			5
Walnut Hollow Farm, Inc.
Subsequent Event
Purchase Price		$ 8.7
Endurable Building Products
Subsequent Event
Purchase Price	$ 10.5