Exhibit 99.1

(as corrected)

10 Cabot Place, Stoughton, MA 02072

News Release

RANDOLPH BANCORP, INC. ANNOUNCES FIRST QUARTER 2018 FINANCIAL RESULTS

STOUGHTON, Massachusetts, April 24, 2018 – Randolph Bancorp, Inc. (the “Company”) (NASDAQ Global Market: RNDB), the holding company for Envision Bank (the “Bank”), today announced a net loss of $707,000, or $0.13 per share, for the first quarter of 2018 compared to a net loss of $447,000, or $0.08 per share, for the first quarter of 2017. Included in the net loss for the 2017 period were merger and integration costs of $167,000 associated with the Company’s 2016 acquisition of First Eastern Bankshares Corporation. Excluding this non-recurring item, the net loss for the first quarter of 2017 would have been $280,000.

James P. McDonough, President and Chief Executive Officer, stated, “We continue to take actions necessary to improve the operating results of our mortgage banking business. We are especially focused on efficiencies in the loan origination process, from application through closing, to ensure our customers a great experience. In addition, we are dedicated to growing our team of loan originators to increase our market share of home purchase loans during the current period of declining home refinancing activity. Since year-end, eight new loan originators have joined our team and we look forward to their contributions to our success in this important segment of our company.”

Mr. McDonough added, “We are very excited with last month’s launch of the Envision Bank brand. Our new name also comes with a new tagline: See the difference. Our style of community banking, one that consistently values both people and technology, defines us. We believe that our customers need ready access to bankers who can help them with complex matters as well as access to technologies that simplify the completion of everyday transactions. Our investments in online banking and bill pay, and mobile banking, as well as the continuing investment in our branch network demonstrate our commitment to delivering a differentiating experience to our customers. Our new Braintree branch office, which opened earlier this month, gives ready access to the Envision Bank brand to this community.”

First Quarter Operating Results

Net interest income increased by $498,000, or 14.3%, to $3,982,000 for the three months ended March 31, 2018 compared to the same period in the prior year. This increase was due to an increase in average interest-earning assets between periods of $61.4 million, or 14.0%, as the Company continued to leverage the capital raised in its 2016 initial public offering The net interest margin decreased slightly in the first quarter of 2018 to 3.20% from 3.22% in the first quarter of 2017, due primarily to the increased utilization of Federal Home Loan Bank of Boston (“FHLBB”) advances to fund asset growth.

The Company recognized a provision for loan losses of $95,000 for the three months ended March 31, 2018 compared to $235,000 for the three months ended March 31, 2017. Classified and nonaccrual loan balances were stable during the quarter while regional and local economic data, including housing prices, continued their positive trend in the first quarter of 2018. The provision during the first quarter of 2018 primarily reflected portfolio growth in the residential and commercial real estate loan portfolios. The allowance for loan losses was 0.93% of total loans at March 31, 2018 compared to 0.92% at December 31, 2017 and was 171.99% of non-performing loans at March 31, 2018 compared to 165.94% at December 31, 2017.

Non-interest income decreased $1,002,000 from $3,410,000 for the three months ended March 31, 2017 to $2,408,000 for the three months ended March 31, 2018. This decrease was primarily due to our mortgage banking business as gains on the sale of mortgage loans decreased $491,000, or 24%, to $1,547,000 and net mortgage servicing fees decreased $326,000, or 49%, to $334,000. Loan sale gains during the first quarter of 2018 were adversely affected by a lower margin caused by rising rates and competitive factors, a lower percentage of loan production being sold, and lower overall production as the inventory of homes listed for sale in our market area continued to be tight during the first quarter. The decrease in mortgage servicing fees was due to two factors, namely 1) a decrease in servicing fees caused by the sale of $379 million in serviced loans during the third quarter of 2017, and 2) a $280,000 partial reversal of the valuation allowance for mortgage servicing rights in the 2017 period compared to a partial reversal of $57,000 in 2018.

Non-interest expenses decreased $131,000, or 1.8%, from $7,129,000 for the three months ended March 31, 2017 to $6,998,000 for the three months ended March 31, 2018. Included in non-interest expenses in the 2017 period were $167,000 of merger and integration costs. Excluding this non-recurring item, non-interest expenses increased $36,000, or less than 1%, in the first quarter of 2018. Expenses in the 2018 period included stock-based compensation of $207,000 and increased marketing costs, largely associated with the re-branding to Envision Bank, of $155,000. These increases fully offset savings in salaries and benefits of $240,000, or 5.1%, due to a fourth quarter 2017 reduction in workforce, and lower professional fees of $50,000.

A federal tax benefit of $26,000 was recognized for the three months ended March 31, 2017 while no benefit for federal income taxes was recognized for the three months ended March 31, 2018. State income taxes of $4,000 and $3,000 were provided during the three months ended March 31, 2018 and 2017, respectively. The Company has a net operating loss carryforward (“NOL”) of $10.3 million. Since 2014, the NOL as well as other deferred tax assets have been subject to a full valuation allowance, which totaled $3.3 million at March 31, 2018. We evaluate this position on a quarterly basis. Based on recent operating results, we concluded that the valuation allowance should be maintained at March 31, 2018.

Balance Sheet

Total assets were $533.5 million at March 31, 2018 compared to $531.9 million at December 31, 2017, an increase of $1.6 million. The increase in net loans of $6.9 million during the first quarter of 2018 was largely offset by decreases in loans held for sale ($3.3 million) and securities available for sale ($2.0 million).    

Net loans totaled $407.3 million at March 31, 2018, an increase of $6.9 million from December 31, 2017. This growth occurred in residential and commercial real estate loans which increased $4.3 million and $5.4 million, respectively, in both cases due to organic growth. Consumer loans and commercial and industrial loans, which consist primarily of loan participations and purchased loans, decreased by a total of $2.6 million during the first quarter of 2018. The Company did not participate in or purchase any new loans during the quarter.

Deposits increased $28.8 million, or 7.8%, to $395.6 million at March 31, 2018 from $366.8 million at December 31, 2017. Included in this increase was $23.0 million of brokered deposits. Deposit growth was primarily used to repay FHLBB advances which decreased $25.0 million, or 33.0%, during the first quarter of 2018.

Total stockholders’ equity was $79.9 million at March 31, 2018 compared to $81.5 million at December 31, 2017. The decrease of $1.6 million during the first quarter of 2018 was due to the net loss of $707,000 and a reduction in the fair value of available-for-sale securities of $1.1 million, partially offset by equity adjustments of $254,000 related to the stock benefit plan and employee stock ownership plan. The Company’s tier one capital to average assets was 15.5% at March 31, 2018 compared to 16.0% at December 31, 2017. The Company and the Bank exceeded their regulatory capital requirements at March 31, 2018.

About Randolph Bancorp, Inc.

Randolph Bancorp, Inc. is the holding company for Envision Bank and its Envision Mortgage Division. Envision Bank is a full-service community bank with six retail branch locations, four loan production offices and loan operations centers in Stoughton, North Attleboro and Andover, Massachusetts.

877-963-2100  •  www.envisionbank.com		2		Member FDIC  •  Member DIF

Forward Looking Statements

Certain statements contained in this press release that are not historical facts may constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and are intended to be covered by the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve risks and uncertainties. The Company’s actual results could differ materially from those projected in the forward-looking statements as a result of, among others, the risk factors described in the Company’s Annual Report on Form 10-K and Quarterly Reports on Form 10-Q as filed with the Securities and Exchange Commission. The Company does not undertake any obligation to update any forward-looking statement to reflect circumstances or events that occur after the date the forward-looking statements are made.

Non-GAAP Financial Measures

The Company uses certain non-GAAP financial measures, such as return on average assets, return on average equity, non-interest income to total income and the efficiency ratio, and, where applicable, as adjusted for non-recurring items. These non-GAAP financial measures provide information for investors to effectively analyze financial trends of on-going business activities, and to enhance comparability with peers across the financial services sector. A table reconciling the Company’s GAAP to non-GAAP net loss is presented herein.

877-963-2100  •  www.envisionbank.com		3		Member FDIC  •  Member DIF

Randolph Bancorp, Inc.

Consolidated Balance Sheets

(Dollars in thousands)

(Unaudited)

877-963-2100  •  www.envisionbank.com		4		Member FDIC  •  Member DIF

Randolph Bancorp, Inc.

Consolidated Statements of Operations

(Dollars in thousands except per share amounts)

(Unaudited)

877-963-2100  •  www.envisionbank.com		5		Member FDIC  •  Member DIF

Randolph Bancorp, Inc.

Reconciliation of GAAP to Non-GAAP Net Loss

(In thousands)

(Unaudited)

The Company’s management believes that the presentation of net loss on a non-GAAP basis excluding non-recurring items provides useful information for evaluating operating results and any related trends that may be affecting the Company’s business. These disclosures should not be viewed as a substitute for operating results determined in accordance with GAAP.

877-963-2100  •  www.envisionbank.com		6		Member FDIC  •  Member DIF

Randolph Bancorp, Inc.

Selected Financial Highlights

(Unaudited)

877-963-2100  •  www.envisionbank.com		7		Member FDIC  •  Member DIF