Exhibit 99.1

Investor Contact:       Media Contact:

Lindsey Opsahl      Leslie Wojcik

SEI         SEI

+1 610-676-4052      +1 610-676-4191

lopsahl@seic.com      lwojcik@seic.com

Pages:  8

FOR IMMEDIATE RELEASE

SEI Reports Second-Quarter 2020 Financial Results

OAKS, Pa., July 22, 2020 – SEI Investments Company (NASDAQ:SEIC) today announced financial results for the second-quarter 2020. Diluted earnings per share were $0.68 in second-quarter 2020 compared to $0.82 in second-quarter 2019.

Consolidated Overview
(In thousands, except earnings per share)						For the Three Months Ended June 30,																								For the Six Months Ended June 30,
						2020						2019						%						2020						2019						%
Revenues						$400,646						$409,586						(2)%						$815,408						$810,406						1%
Net income						101,066						126,540						(20)%						210,308						240,521						(13)%
Diluted earnings per share						$0.68						$0.82						(17)%						$1.39						$1.54						(10)%

“While we and the rest of the world continue to cope with the pandemic, our employees’ health and safety remain our top priority as we move through our return-to-office plans. We are proud of our global workforce’s resilience as they manage the extended period of a remote workplace—all the while remaining totally committed to supporting and servicing our clients. We greatly appreciate the healthcare workers and others who help us deal with COVID-19’s impact on our lives,” said Alfred P. West, Jr., SEI Chairman and CEO.

“While financial markets somewhat rebounded during the quarter, we experienced headwinds that impacted our results. Our client engagement was high last quarter, resulting in positive sales activity. We continue to invest in our One SEI strategy, using this period to accelerate the necessary development work that will bring this initiative to its full potential.

“Our view of the future is not dampened by the challenges we all face in society today. Our diverse global workforce is the foundation of what will enable us to fulfill our promise of serving our clients and communities in which we work and live. Capitalizing on the opportunities in the markets we serve and the solutions we offer will lead to increased shareholder value.”

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Summary of Second-Quarter Results by Business Segment

(In thousands)						For the Three Months Ended June 30,																								For the Six Months Ended June 30,
						2020						2019						%						2020						2019						%
Private Banks:
Revenues						$107,726						$116,092						(7)%						$220,947						$234,351						(6)%
Expenses						107,723						107,790						—%						218,376						218,752						—%
Operating Profit						3						8,302						(100)%						2,571						15,599						(84)%
Operating Margin						—		%				7		%										1		%				7		%
Investment Advisors:
Revenues						93,708						100,122						(6)%						196,029						194,883						1%
Expenses						50,149						50,558						(1)%						102,581						103,060						—%
Operating Profit						43,559						49,564						(12)%						93,448						91,823						2%
Operating Margin						46		%				50		%										48		%				47		%
Institutional Investors:
Revenues						76,523						81,109						(6)%						155,726						161,222						(3)%
Expenses						36,937						39,361						(6)%						75,204						78,115						(4)%
Operating Profit						39,586						41,748						(5)%						80,522						83,107						(3)%
Operating Margin						52		%				51		%										52		%				52		%
Investment Managers:
Revenues						119,340						109,202						9%						235,969						213,851						10%
Expenses						74,668						68,371						9%						148,957						137,437						8%
Operating Profit						44,672						40,831						9%						87,012						76,414						14%
Operating Margin						37		%				37		%										37		%				36		%
Investments in New Businesses:
Revenues						3,349						3,061						9%						6,737						6,099						10%
Expenses						13,466						6,797						98%						24,376						12,737						91%
Operating Loss						(10,117)						(3,736)						NM						(17,639)						(6,638)						NM
Totals:
Revenues						$400,646						$409,586						(2)%						$815,408						$810,406						1%
Expenses						282,943						272,877						4%						569,494						550,101						4%
Corporate Overhead Expenses						17,391						16,573						5%						35,374						36,608						(3)%
Income from Operations						$100,312						$120,136						(17)%						$210,540						$223,697						(6)%

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Second-Quarter Business Highlights:

•Revenues from Asset management, administration, and distribution fees decreased primarily from lower assets under management from the carryover effect of the sharp market depreciation during March 2020, which negatively impacted our asset-based fee revenues. This decline was partially offset by increased fees from higher assets under administration from positive cash flows and sales of new business in our Investment Managers segment.

•Our average assets under administration increased $49.2 billion, or 8%, to $672.8 billion in the second-quarter 2020, as compared to $623.6 billion during the second-quarter 2019 (see attached Average Asset Balances schedules for further details).

•Our average assets under management, excluding LSV, declined $1.8 billion, or 1%, to $226.8 billion in the second-quarter 2020, as compared to $228.6 billion during the second-quarter 2019 (see attached Average Asset Balances schedules for further details).

•Information processing and software servicing fees in our Private Banks segment decreased by $5.4 million during the second-quarter 2020 due primarily to previously announced client losses.

•Sales events, net of client losses, during second-quarter 2020 totaled approximately $22.1 million and are expected to generate net annualized recurring revenues of approximately $16.6 million when contract values are fully realized.

•The increase in our operational expenses was primarily due to increased consulting costs related to our continued investments in new business opportunities, such as our One SEI strategy and IT Services offering. This increase was partially offset by a decline in travel and promotional-related expenses, as our sales and client relationship personnel adapted to COVID-19 restrictions.

•Our earnings from LSV decreased by $9.5 million, or 25%, to $28.3 million in second-quarter 2020 as compared to $37.8 million in second-quarter 2019. The decrease in earnings was due to lower assets under management from negative cash flows from existing clients, the carryover effect of negative markets in March 2020, and client losses.

•We capitalized $5.6 million of software development costs in second-quarter 2020 for continued enhancements to the SEI Wealth Platform^SM (SWP). Amortization expense related to SWP was $10.9 million in second-quarter 2020.

•Our effective tax rates were 23.3% in second-quarter 2020 and 22.1% in second-quarter 2019. The increase in our effective tax rate was due to decreased tax benefits associated with a lower volume of stock option exercises and a higher effective state tax rate.

•We repurchased 1.6 million shares of our common stock for $89.5 million during the second-quarter 2020.

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Earnings Conference Call

A conference call to review earnings is scheduled for 4:30 p.m. Eastern time on July 22, 2020. Investors may listen to the call at seic.com/ir-events. Investors may also listen to a replay by telephone at (USA) 866-207-1041; (International) 402-970-0847; Access Code: 8812985.

About SEI

After 50 years in business, SEI (NASDAQ:SEIC) remains a leading global provider of investment processing, investment management, and investment operations solutions that help corporations, financial institutions, financial advisors, and ultra-high-net-worth families create and manage wealth.

As of June 30, 2020, through its subsidiaries and partnerships in which the company has a significant interest, SEI manages, advises or administers $1 trillion in hedge, private equity, mutual fund and pooled or separately managed assets, including $318 billion in assets under management and $693 billion in client assets under administration. For more information, visit seic.com.

This release contains forward-looking statements within the meaning or the rules and regulations of the Securities and Exchange Commission. In some cases you can identify forward-looking statements by terminology, such as ‘'may,’' '‘will,’' ‘'expect,’' ‘'believe’' and ‘'continue’' or ‘‘appear.’’ Our forward-looking statements include our current expectations as to:

•revenue that we believe will be generated by sales events that occurred during the quarter,

•whether our development initiatives will enable the full potential of our One SEI initiative,

•whether we will fulfill our promise of serving our clients and communities, and

•whether capitalizing on the opportunities in the markets in which we serve and the solutions we offer will lead to shareholder value.

You should not place undue reliance on our forward-looking statements, as they are based on the current beliefs and expectations of our management and subject to significant risks and uncertainties, many of which are beyond our control or are subject to change. Although we believe the assumptions upon which we base our forward-looking statements are reasonable, they could be inaccurate. Some of the risks and important factors that could cause actual results to differ from those described in our forward-looking statements can be found in the “Risk Factors” section of our Annual Report on Form 10-K for the year ended Dec. 31, 2019, filed with the Securities and Exchange Commission.

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SEI INVESTMENTS COMPANY

CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share data)

(Unaudited)

						For the Three Months Ended June 30,																		For the Six Months Ended June 30,
						2020						2019						2020						2019
Asset management, admin. and distribution fees						$320,577						$324,925						$652,430						$638,869
Information processing and software servicing fees						80,069						84,661						162,978						171,537
Total revenues						400,646						409,586						815,408						810,406
Subadvisory, distribution and other asset mgmt. costs						44,182						46,177						89,519						89,982
Software royalties and other information processing costs						7,389						7,393						14,836						15,521
Compensation, benefits and other personnel						125,331						125,999						256,812						256,334
Stock-based compensation						7,062						5,064						13,991						10,102
Consulting, outsourcing and professional fees						57,111						45,330						110,401						95,536
Data processing and computer related						24,506						22,184						47,210						43,176
Facilities, supplies and other costs						13,973						17,100						30,769						35,845
Amortization						13,140						12,781						26,217						25,460
Depreciation						7,640						7,422						15,113						14,753
Total expenses						300,334						289,450						604,868						586,709
Income from operations						100,312						120,136						210,540						223,697
Net gain (loss) on investments						1,903						231						(2,086)						1,510
Interest and dividend income						1,370						4,313						4,573						8,570
Interest expense						(151)						(166)						(303)						(323)
Equity in earnings of unconsolidated affiliate						28,276						37,832						58,183						75,149
Income before income taxes						131,710						162,346						270,907						308,603
Income taxes						30,644						35,806						60,599						68,082
Net income						$101,066						$126,540						$210,308						$240,521
Basic earnings per common share						$0.69						$0.83						$1.42						$1.58
Shares used to calculate basic earnings per share						147,478						151,863						148,473						152,587
Diluted earnings per common share						$0.68						$0.82						$1.39						$1.54
Shares used to calculate diluted earnings per share						149,598						155,165						150,983						155,853
Dividends declared per common share						$0.35						$0.33						$0.35						$0.33

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SEI INVESTMENTS COMPANY

CONSOLIDATED BALANCE SHEETS

(In thousands)

(Unaudited)

						June 30,						December 31,
						2020						2019
Assets
Current Assets:
Cash and cash equivalents						$758,276						$841,446
Restricted cash						3,101						3,101
Receivables from investment products						49,873						54,165
Receivables, net of allowance for doubtful accounts of $1,079 and $1,201						351,614						340,358
Securities owned						35,030						33,486
Other current assets						35,005						32,289
Total Current Assets						1,232,899						1,304,845
Property and Equipment, net of accumulated depreciation of $367,677 and $353,453						182,273						160,859
Operating Lease Right-of-Use Assets						39,076						42,789
Capitalized Software, net of accumulated amortization of $466,937 and $442,677						284,341						296,068
Available for Sale and Equity Securities						105,361						116,917
Investments in Affiliated Funds, at fair value						4,749						5,988
Investment in Unconsolidated Affiliate						41,094						67,413
Goodwill						64,489						64,489
Intangible Assets, net of accumulated amortization of $10,615 and $8,773						26,145						27,987
Deferred Contract Costs						33,108						30,991
Deferred Income Taxes						2,343						2,822
Other Assets, net						37,722						30,202
Total Assets						$2,053,600						$2,151,370
Liabilities and Equity
Current Liabilities:
Accounts payable						$10,780						$4,423
Accrued liabilities						210,711						272,801
Current portion of long-term operating lease liabilities						8,285						9,156
Deferred revenue						6,349						7,185
Total Current Liabilities						236,125						293,565
Long-term Income Taxes Payable						803						803
Deferred Income Taxes						50,219						55,722
Long-term Operating Lease Liabilities						35,224						38,450
Other Long-term Liabilities						22,604						24,052
Total Liabilities						344,975						412,592
Shareholders' Equity:
Common stock, $0.01 par value, 750,000 shares authorized; 146,445 and 149,745 shares issued and outstanding						1,464						1,497
Capital in excess of par value						1,174,411						1,158,900
Retained earnings						566,929						601,885
Accumulated other comprehensive loss, net						(34,179)						(23,504)
Total Shareholders' Equity						1,708,625						1,738,778
Total Liabilities and Shareholders' Equity						$2,053,600						$2,151,370

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ENDING ASSET BALANCES

(In millions) (Unaudited)

						Jun. 30,						Sept. 30,						Dec. 31,						Mar. 31,						Jun. 30,
						2019						2019						2019						2020						2020
Private Banks:
Equity and fixed-income programs						$22,563						$22,580						$23,851						$21,160						$22,974
Collective trust fund programs						4						4						4						5						5
Liquidity funds						3,322						3,695						3,405						4,143						4,291
Total assets under management						$25,889						$26,279						$27,260						$25,308						$27,270
Client assets under administration						23,387						23,985						25,801						21,497						23,903
Total assets						$49,276						$50,264						$53,061						$46,805						$51,173
Investment Advisors:
Equity and fixed-income programs						$64,591						$65,059						$67,895						$54,856						$59,958
Collective trust fund programs						6						4						4						2						3
Liquidity funds						2,618						2,673						2,887						5,969						6,648
Total assets under management						$67,215						$67,736						$70,786						$60,827						$66,609
Institutional Investors:
Equity and fixed-income programs						$82,335						$82,659						$84,291						$72,399						$80,257
Collective trust fund programs						78						81						83						94						103
Liquidity funds						2,173						2,290						1,746						3,672						1,924
Total assets under management						$84,586						$85,030						$86,120						$76,165						$82,284
Client assets under advisement						3,598						4,467						3,948						3,406						3,326
Total assets						$88,184						$89,497						$90,068						$79,571						$85,610
Investment Managers:
Collective trust fund programs						51,838						53,169						58,070						48,226						58,178
Liquidity funds						472						477						479						392						664
Total assets under management						$52,310						$53,646						$58,549						$48,618						$58,842
Client assets under administration (A)						607,086						637,986						657,541						610,794						668,611
Total assets						$659,396						$691,632						$716,090						$659,412						$727,453
Investments in New Businesses:
Equity and fixed-income programs						$1,566						$1,621						$1,688						$1,484						$1,498
Liquidity funds						141						132						158						152						194
Total assets under management						$1,707						$1,753						$1,846						$1,636						$1,692
Client assets under advisement						887						825						1,343						1,056						1,193
Total assets						$2,594						$2,578						$3,189						$2,692						$2,885
LSV Asset Management:
Equity and fixed-income programs (B)						$103,575						$100,295						$107,476						$70,851						$81,134
Total:
Equity and fixed-income programs (C)						$274,630						$272,214						$285,201						$220,750						$245,821
Collective trust fund programs						51,926						53,258						58,161						48,327						58,289
Liquidity funds						8,726						9,267						8,675						14,328						13,721
Total assets under management						$335,282						$334,739						$352,037						$283,405						$317,831
Client assets under advisement						4,485						5,292						5,291						4,462						4,519
Client assets under administration (D)						630,473						661,971						683,342						632,291						692,514
Total assets						$970,240						$1,002,002						$1,040,670						$920,158						$1,014,864

(A)Client assets under administration in the Investment Managers segment include $49.6 billion of assets that are at fee levels below our normal full-service assets (as of June 30, 2020).

(B)Equity and fixed-income programs include $1.6 billion of assets managed by LSV in which fees are based on performance only (as of June 30, 2020).

(C)Equity and fixed-income programs include $7.4 billion of assets invested in various asset allocation funds at June 30, 2020.

(D)In addition to the numbers presented, SEI also administers an additional $11.3 billion in Funds of Funds assets (as of

June 30, 2020) on which SEI does not earn an administration fee.

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AVERAGE ASSET BALANCES

(In millions) (Unaudited)

						2nd Qtr.						3rd Qtr.						4th Qtr.						1st Qtr.						2nd Qtr.
						2019						2019						2019						2020						2020
Private Banks:
Equity and fixed-income programs						$22,088						$22,432						$23,106						$24,657						$22,229
Collective trust fund programs						4						4						4						4						5
Liquidity funds						3,388						3,625						3,581						3,581						4,366
Total assets under management						$25,480						$26,061						$26,691						$28,242						$26,600
Client assets under administration						23,124						23,717						24,930						24,840						23,819
Total assets						$48,604						$49,778						$51,621						$53,082						$50,419
Investment Advisors:
Equity and fixed-income programs						$62,419						$64,761						$66,371						$64,933						$57,429
Collective trust fund programs						6						5						4						3						3
Liquidity funds						3,465						2,580						2,673						3,284						6,923
Total assets under management						$65,890						$67,346						$69,048						$68,220						$64,355
Institutional Investors:
Equity and fixed-income programs						$82,597						$82,398						$83,304						$79,926						$77,037
Collective trust fund programs						78						80						82						86						100
Liquidity funds						2,342						2,287						2,106						2,342						2,476
Total assets under management						$85,017						$84,765						$85,492						$82,354						$79,613
Client assets under advisement						3,641						3,797						4,106						3,760						3,362
Total assets						$88,658						$88,562						$89,598						$86,114						$82,975
Investment Managers:
Collective trust fund programs						50,108						52,587						55,499						55,952						54,061
Liquidity funds						497						460						642						617						482
Total assets under management						$50,605						$53,047						$56,141						$56,569						$54,543
Client assets under administration (A)						600,509						630,328						646,592						654,386						649,012
Total assets						$651,114						$683,375						$702,733						$710,955						$703,555
Investments in New Businesses:
Equity and fixed-income programs						$1,436						$1,609						$1,649						$1,663						$1,468
Liquidity funds						178						142						145						168						182
Total assets under management						$1,614						$1,751						$1,794						$1,831						$1,650
Client assets under advisement						917						842						1,044						1,222						1,148
Total assets						$2,531						$2,593						$2,838						$3,053						$2,798
LSV Asset Management:
Equity and fixed-income programs (B)						$102,919						$100,094						$104,814						$88,059						$80,395
Total:
Equity and fixed-income programs (C)						$271,459						$271,294						$279,244						$259,238						$238,558
Collective trust fund programs						50,196						52,676						55,589						56,045						54,169
Liquidity funds						9,870						9,094						9,147						9,992						14,429
Total assets under management						$331,525						$333,064						$343,980						$325,275						$307,156
Client assets under advisement						4,558						4,639						5,150						4,982						4,510
Client assets under administration (D)						623,633						654,045						671,522						679,226						672,831
Total assets						$959,716						$991,748						$1,020,652						$1,009,483						$984,497

(A) Average client assets under administration in the Investment Managers segment during second-quarter 2020 include $50.1 billion that are at fee levels below our normal full-service assets.

(B) Equity and fixed-income programs include $1.4 billion of average assets managed by LSV in which fees are based on performance only during second-quarter 2020.

(C) Equity and fixed-income programs include $7.4 billion of average assets invested in various asset allocation funds during second-quarter 2020.

(D) In addition to the numbers presented, SEI also administers an additional $11.3 billion of average assets in Funds of Funds assets during second-quarter 2020 on which SEI does not earn an administration fee.

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