Mid Cap Stock Fund

LAVLX

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Daily price w/o sales charge as of 01/14/2021

$30.51

$0.20

YTD Returns w/o sales charge as of 01/14/2021

5.13%

Please click here for performance current to the most recent quarter-end and month-end.

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Summary

What is the Mid Cap Stock Fund?

The Fund seeks to deliver long-term growth of capital by investing primarily in stocks of mid-sized U.S. companies.

Fund Basicsas of 12/31/2020

Total Net Assets: $1.32 B
Inception Date: 06/28/1983
Dividend Frequency: Semi-Annually
Number of Holdings: 79
Minimum Initial Investment: $1,000+

Expense Ratioas of 12/31/2020

Fund Expense Ratio :

0.98%

	YTD	1-YR	3-YR	5-YR	10-YR	Since Inception 06/28/1983

w/o sales charge	2.73%	2.73%	2.57%	6.14%	7.59%	10.18%
Lipper Category Avg. Mid-Cap Core Funds	9.18%	9.18%	7.01%	9.83%	9.57%	-
Russell Midcap® Value Index	4.96%	4.96%	5.37%	9.73%	10.49%	-
w/ sales charge	-3.16%	-3.16%	0.57%	4.89%	6.95%	10.01%

Fund Expense Ratio :

0.98%

Fund Expense Ratio :

0.98%

	YTD	1-YR	3-YR	5-YR	10-YR	Since Inception 06/28/1983

w/o sales charge	2.73%	2.73%	2.57%	6.14%	7.59%	10.18%
Lipper Category Avg. Mid-Cap Core Funds	9.18%	9.18%	7.01%	9.83%	9.57%	-
Russell Midcap® Value Index	4.96%	4.96%	5.37%	9.73%	10.49%	-
w/ sales charge	-3.16%	-3.16%	0.57%	4.89%	6.95%	10.01%

Fund Expense Ratio :

0.98%

Returns with sales charges reflect a maximum sales charge of 5.75%.

The performance quoted represents past performance, which is no indication of future results. Current performance may be higher or lower than the performance data quoted. Returns shown include the reinvestment of all distributions. Returns shown at net asset value do not reflect the current maximum sales charge, had the sales charge been included, returns would have been lower. The investment return and principal value of an investment will fluctuate so that shares, on any given day or when redeemed, may be worth more or less than the original cost. Therefore, there can be no assurance for future results.

TEN LARGEST HOLDINGS as of 12/31/2020View Portfolio

Holding	Assets
Discover Financial Services	2.1%
Euronet Worldwide, Inc.	2.0%
Ameriprise Financial, Inc.	1.9%
Lear Corp.	1.8%
CIT Group, Inc.	1.7%
East West Bancorp, Inc.	1.7%
Hartford Financial Services Group Inc/The	1.7%
Masco Corp.	1.7%
Teradyne, Inc.	1.7%
Waters Corp.	1.6%

Aggregate holdings are updated monthly, 30 days after month end. Aggregate holdings are presented to illustrate examples of the securities that the Fund has bought and the diversity of the areas in which the Fund may invest, and may not be representative of the Fund's current or future investments. The figures presented are as of the date shown and may change at any time.

Sector Allocationas of 12/31/2020View Portfolio

Sector	Weighting

Sector	Weighting
Communication Services
Real Estate
Utilities
Consumer Discretionary
Consumer Staples
Energy
Financials
Health Care
Industrials
Information Technology
Materials

INVESTMENT TEAM

Eli Rabinowich

Portfolio Manager

16 Years of Industry Experience

Jeff Diamond, CFA

Portfolio Manager

33 Years of Industry Experience

John C. Hardy

Portfolio Manager

17 Years of Industry Experience

Supported By 34 Investment Professionals with 18 Years Avg. Industry Experience

Your Representative

To contact your representative, enter your zip code and select your channel below.

Performance

Fund Expense Ratio :

0.98%

	YTD	1-YR	3-YR	5-YR	10-YR	Since Inception 06/28/1983

w/o sales charge	2.73%	2.73%	2.57%	6.14%	7.59%	10.18%
Lipper Category Avg. Mid-Cap Core Funds	9.18%	9.18%	7.01%	9.83%	9.57%	-
Russell Midcap® Value Index	4.96%	4.96%	5.37%	9.73%	10.49%	-
w/ sales charge	-3.16%	-3.16%	0.57%	4.89%	6.95%	10.01%

Fund Expense Ratio :

0.98%

Fund Expense Ratio :

0.98%

	YTD	1-YR	3-YR	5-YR	10-YR	Since Inception 06/28/1983

w/o sales charge	2.73%	2.73%	2.57%	6.14%	7.59%	10.18%
Lipper Category Avg. Mid-Cap Core Funds	9.18%	9.18%	7.01%	9.83%	9.57%	-
Russell Midcap® Value Index	4.96%	4.96%	5.37%	9.73%	10.49%	-
w/ sales charge	-3.16%	-3.16%	0.57%	4.89%	6.95%	10.01%

Fund Expense Ratio :

0.98%

Returns with sales charges reflect a maximum sales charge of 5.75%.

Year	Fund Returns	Russell Midcap® Value Index

2020	2.73%	4.96%
2019	22.91%	27.06%
2018	-14.54%	-12.29%
2017	7.03%	13.34%
2016	16.61%	20.00%
2015	-3.55%	-4.78%
2014	11.60%	14.75%
2013	30.32%	33.46%
2012	14.49%	18.51%
2011	-3.95%	-1.38%
2010	25.55%	-
2009	26.67%	-
2008	-39.44%	-
2007	0.54%	-
2006	12.36%	-
2005	8.16%	-
2004	24.10%	-
2003	24.94%	-
2002	-9.75%	-
2001	8.00%	-

Year	Q1	Q2	Q3	Q4	Yearly Returns

2021	-	-	-	-	5.13%
2020	-30.43%	20.21%	0.00%	22.84%	2.73%
2019	13.37%	1.43%	1.42%	5.39%	22.91%
2018	-1.77%	1.02%	4.09%	-17.26%	-14.54%
2017	2.54%	1.53%	0.13%	2.67%	7.03%
2016	1.90%	3.73%	4.25%	5.83%	16.61%
2015	3.52%	-1.27%	-8.31%	2.92%	-3.55%
2014	3.13%	5.08%	-3.29%	6.48%	11.60%
2013	12.26%	1.79%	4.73%	8.89%	30.32%
2012	11.48%	-7.17%	5.58%	4.79%	14.49%
2011	8.03%	0.11%	-22.38%	14.42%	-3.95%
2010	7.31%	-9.29%	12.51%	14.64%	25.55%
2009	-12.27%	14.32%	19.50%	5.70%	26.67%
2008	-13.32%	0.13%	-11.53%	-21.13%	-39.44%
2007	4.99%	6.02%	-3.76%	-6.15%	0.54%
2006	3.65%	-2.85%	2.43%	8.94%	12.36%
2005	-0.15%	2.22%	4.25%	1.65%	8.16%
2004	6.53%	2.64%	0.29%	13.16%	24.10%
2003	-7.85%	15.39%	4.55%	12.39%	24.94%
2002	5.73%	-6.16%	-14.72%	6.65%	-9.75%
2001	-2.05%	5.32%	-7.94%	13.72%	8.00%
2000	10.84%	6.77%	12.83%	14.81%	53.30%
1999	-6.31%	17.56%	-7.58%	2.40%	4.24%
1998	8.45%	0.07%	-17.30%	10.92%	-0.45%
1997	1.08%	13.81%	12.06%	2.03%	31.54%
1996	6.72%	0.43%	4.17%	8.58%	21.23%
1995	7.66%	6.63%	5.41%	4.19%	26.09%
1994	-3.01%	-0.62%	5.08%	-4.50%	-3.27%
1993	6.84%	0.59%	3.77%	2.18%	13.95%
1992	2.21%	-0.26%	1.86%	9.28%	13.46%
1991	12.05%	-0.87%	5.44%	8.75%	27.36%
1990	-1.62%	2.87%	-14.71%	10.48%	-4.64%
1989	5.02%	6.61%	6.88%	0.36%	20.10%
1988	11.00%	9.02%	-4.36%	-0.10%	15.62%
1987	13.50%	0.50%	9.33%	-23.17%	-4.18%
1986	17.62%	5.67%	-6.69%	0.32%	16.34%
1985	5.88%	9.74%	-4.39%	21.22%	34.67%
1984	-10.14%	-5.12%	11.04%	4.51%	-1.05%
1983	-	-	0.33%	2.07%	2.51%

Performance is shown for each quarter and each calendar year. Past performance is no guarantee of future results.

Growth of $10,000 as of 12/31/2020

The chart begins on the Fund's inception date of 06/28/1983.

Based on a hypothetical Class A share investment of $10,000 on 06/28/1983 without sales charge and includes the reinvestment of all distributions.

NAV HISTORICAL PRICES

Date	Net Asset Value

Portfolio

Holding	Sector	Assets

Discover Financial Services	Financials	2.1%
Euronet Worldwide, Inc.	Information Technology	2.0%
Ameriprise Financial, Inc.	Financials	1.9%
Lear Corp.	Consumer Discretionary	1.8%
CIT Group, Inc.	Financials	1.7%
East West Bancorp, Inc.	Financials	1.7%
Hartford Financial Services Group Inc/The	Financials	1.7%
Masco Corp.	Industrials	1.7%
Teradyne, Inc.	Information Technology	1.7%
Waters Corp.	Health Care	1.6%

Holding	Sector	Assets

Discover Financial Services	Financials	2.1%
Euronet Worldwide, Inc.	Information Technology	2.0%
Teradyne, Inc.	Information Technology	1.9%
Ameriprise Financial, Inc.	Financials	1.8%
Corteva Inc	Materials	1.8%
Cummins, Inc.	Industrials	1.8%
Lear Corp.	Consumer Discretionary	1.7%
Lundin Mining Corp.	Materials	1.7%
Edison International	Utilities	1.7%
CIT Group, Inc.	Financials	1.7%
Hexcel Corp.	Industrials	1.7%
Entergy Corp.	Utilities	1.6%
Valvoline, Inc.	Materials	1.6%
Hartford Financial Services Group, Inc.	Financials	1.6%
Waters Corp.	Health Care	1.6%
EMCOR Group, Inc.	Industrials	1.6%
Avery Dennison Corp.	Materials	1.6%
Hubbell, Inc.	Industrials	1.5%
Citizens Financial Group, Inc.	Financials	1.5%
Rockwell Automation, Inc.	Industrials	1.5%
East West Bancorp, Inc.	Financials	1.5%
Wabtec Corp.	Industrials	1.5%
Brunswick Corp.	Consumer Discretionary	1.5%
Alexandria Real Estate Equities, Inc.	Real Estate	1.5%
Ross Stores, Inc.	Consumer Discretionary	1.5%
Camden Property Trust	Real Estate	1.5%
Alcon Inc	Health Care	1.5%
A.O. Smith Corp.	Industrials	1.4%
Masco Corp.	Industrials	1.4%
Quest Diagnostics, Inc.	Health Care	1.4%
Fidelity National Financial Group	Financials	1.4%
CMS Energy Corp.	Utilities	1.4%
Everest Re Group Ltd.	Financials	1.4%
Synopsys, Inc.	Information Technology	1.4%
Acuity Brands, Inc.	Industrials	1.4%
Landstar System, Inc.	Industrials	1.4%
Leggett & Platt, Inc.	Consumer Discretionary	1.4%
Harley-Davidson, Inc.	Consumer Discretionary	1.3%
Pinnacle West Capital Corp.	Utilities	1.3%
Duke Realty Corp.	Real Estate	1.3%
Delta Air Lines, Inc.	Industrials	1.3%
Eldorado Resorts, Inc.	Consumer Discretionary	1.3%
Omnicom Group, Inc.	Communication Services	1.3%
F5 Networks, Inc.	Information Technology	1.3%
eBay, Inc.	Consumer Discretionary	1.3%
Highwoods Properties, Inc.	Real Estate	1.3%
SVB Financial Group	Financials	1.3%
Torchmark Corp.	Financials	1.3%
Avnet, Inc.	Information Technology	1.2%
Axalta Coating Systems Ltd.	Materials	1.2%
AmerisourceBergen Corp.	Health Care	1.2%
Healthcare Trust of America, Inc.	Real Estate	1.2%
KKR & Co Inc	Financials	1.2%
Carlsberg A/S	Consumer Staples	1.2%
Fox Corp	Communication Services	1.2%
Weingarten Realty Investors	Real Estate	1.2%
NuVasive, Inc.	Health Care	1.1%
Williams-Sonoma, Inc.	Consumer Discretionary	1.1%
J.M. Smucker Co.	Consumer Staples	1.1%
Parsley Energy, Inc.	Energy	1.1%
NetApp, Inc.	Information Technology	1.0%
Xilinx, Inc.	Information Technology	1.0%
Spectrum Brands Holdings Inc	Consumer Staples	1.0%
Choice Hotels International, Inc.	Consumer Discretionary	1.0%
Reynolds Consumer Products Inc	Consumer Staples	0.9%
ONEOK, Inc.	Energy	0.8%
Marathon Petroleum Corp.	Energy	0.8%
CoreSite Realty Corp.	Real Estate	0.8%
Cabot Oil & Gas Corp.	Energy	0.7%
Host Hotels & Resorts, Inc.	Real Estate	0.7%
Nexstar Broadcasting Group, Inc.	Communication Services	0.7%
American Water Works Co., Inc.	Utilities	0.7%
Domino's Pizza, Inc.	Consumer Discretionary	0.6%
National Oilwell Varco, Inc.	Energy	0.6%
Exelixis, Inc.	Health Care	0.5%
Evergy Inc	Utilities	0.4%
Ares Capital Corp.	Financials	0.1%

SECTOR ALLOCATIONas of 12/31/2020

Sector	Weighting	Fund Change from Previous Quarter

Sector	Weighting	Fund Change from Previous Quarter
Communication Services		0.3%
Real Estate		0.6%
Utilities		2.0%
Consumer Discretionary		1.1%
Consumer Staples		0.3%
Energy		0.4%
Financials		0.5%
Health Care		0.2%
Industrials		0.4%
Information Technology		1.0%
Materials		0.3%

Portfolio Positioning as of 06/30/2020

The Fund employs a fundamental, bottom-up individual stock selection strategy that focuses on quality companies with compelling valuations over a long term horizon.
Given our longer-term orientation and the focus we place on normalized free cash flow, we believe we have a unique ability to look through some of the shorter-term impacts on companies due to the global pandemic, and we continue to look for opportunities amid the volatility. As a result, we have been able to methodically upgrade the portfolio in areas that have been particularly impacted by adhering to our process.
We also initiated a position in shares of Masco Corp. (1.7%), an architectural coatings and plumbing fixtures manufacturer for the residential market. In our view, the company is well managed, has a strong financial profile and is wellpositioned to benefit from the continued growth in U.S. housing demand. As a result of market volatility, we had the opportunity to invest in Masco at what we believe to be very attractive valuations.
We also initiated a position in Rockwell Automation, Inc., a North American automation supplier for discrete manufacturing applications. We view the company as a high quality industrial company with unique scarcity value and attractive long-term secular growth characteristics driven in part by the potential for re-shoring of manufacturing back to the United States. As a result of market volatility, we had the opportunity to invest in a company at what we believe to be very attractive valuations.
We eliminated the portfolio’s position in Zimmer Biomet Holdings, Inc., a musculoskeletal health care services provider, and Consolidated Edison, Inc., a utilities company, which was consistent with our normalized free cash flow methodology.

PORTFOLIO DETAILS as of 12/31/2020

Total Net Assets: $1.32 B
Number of Holdings: 79
Weighted Average Market Cap.: 14.8 B
P/B Ratio: 2.5x
Portfolio Turnover Ratio as of 12/31/2019: 69.3%
P/E Ratio: 23.5x

To view definitions for the above Portfolio Details, Click here.

Market Capitalization Breakdown - Morningstar separates stock portfolio holdings into five market-capitalization groups: Giant, Large, Mid, Small, and Micro. Of the 5000 largest domestic stocks in their equities database, the top 1% are categorized as Giant, the next 4% are Large, the next 15% are Mid, the next 30% are Small, and the remaining 50% are Micro. Stocks outside of the largest 5000 are also classified as Micro.

Weighted Average Market Cap - The average market capitalization of all companies held in the portfolio with each company weighted according to its percent held in the portfolio. The result is based upon a weighted average of the securities held in the fund.

P/B Ratio - A ratio that helps determine whether a stock is undervalued or overvalued. It is calculated by dividing a stock's price per share by its book value per share. The result is based upon a weighted average of the securities held in the fund.

P/E Ratio - Is the weighted average of each holding's P/E ratio (price of a stock divided by its earnings per share). The result is based upon a weighted average of the securities held in the fund.

Portfolio Turnover - This is a measure of the Fund’s trading activity which is computed by taking the lesser of purchases or sales divided by average monthly market value, excluding short-term investments. The resulting percentage represents the percentage of the portfolio’s holdings that have changed over the past year.

Contributors & Detractors as of 12/31/2020

Contributors

Holding	Contribution
Discover Financial Services	1.0%
Euronet Worldwide, Inc.	0.9%
Lundin Mining Corp.	0.8%
CIT Group, Inc.	0.8%
Teradyne, Inc.	0.8%

Detractors

Holding	Contribution
Exelixis, Inc.	-0.1%
Harley-Davidson, Inc.	-0.1%
Columbia Sportswear Co.	-0.1%
Apollo Global Mgmt Inc	-0.1%
Domino's Pizza, Inc.	-0.1%

% Contribution reflects the effect of the individual stock's performance on the Fund's overall performance for the period. Individual holdings and their effect on Fund performance may change significantly over time. Investors should consider the overall performance of the Fund before making a decision on whether or not to invest in the Fund.

Attribution Analysis

for

Mid Cap Stock Fund			Benchmark		Variance
Sector	Avg. Weight	Base Return	Avg. Weight	Base Return	Stock Selection	Group Weight	Total

The total base return displayed for the Fund does not capture daily cash flow and trading activity and therefore is subject to reasonable variance from the Fund's actual return. Please refer to Lord Abbett Growth Opportunities Fund Performance Results for the Fund's longer-term returns. The Fund is actively managed and portfolio characteristics, such as individual holdings and sector weightings, may change significantly over time.

Please see "About Wilshire Attribution" of the performance attribution displayed above by Click here.

About Wilshire Attribution

The Wilshire Atlas Variance Analysis tool provides a methodology for explaining the difference in performance between a portfolio and its benchmark, based on the decomposition of returns. The user specifies the portfolio, index, link frequency, sector and weighting. The weighting can be shown as beginning, average or end weights and is used for display purposes only.

Average Weight (Portfolio): This is the average weight of each group in the portfolio. Alternatively, the weight at the end of the reporting period, or on average across the reporting period, may be selected.

Base Return (Portfolio): This is the weighted average holding period return for the securities in each group. This weighted average is calculated for each link period using beginning weights and then the resulting values are linked together to calculate the displayed value.

Average Weight (Benchmark): This is the average weight of each group in the benchmark. Alternatively, the weight at the end of the reporting period, or on average across the reporting period, may be selected.

Base Return (Benchmark): This is the weighted average holding period return for the benchmark securities in each group. This weighted average is calculated for each link period using beginning weights, then the resulting values are linked together to calculate the displayed value.

Stock Selection Variance: This is the success of selection decisions within each group versus the benchmark. It is calculated for each link period using the following equation: Stock Selection Variance = WP,G * (RP,G - RB,G), where WP,G = Weight of the group in the portfolio, RP,G = Return of the group in the portfolio, RB,G = Return of the group in the benchmark.

Group Weighting Variance: This is the result of weighting decisions in each group versus the benchmark. It is calculated for each link period using the following equation: Group Weighting Variance = (WP,G – WB,G) * (RB,G – RB,T), where WP,G = Weight of the group in the portfolio, WB,G = Weight of the group in the benchmark, RB,G = Return of the group in the benchmark, RB,T = Overall return of the benchmark.

Total Variance: This is the sum of group weighting and stock selection variances. This represents the amount of total variance that is explained by the selection and allocation decisions for each group.

Wilshire generated returns are calculated gross of fees based on end of day prices and do not capture intraday cash flow, price changes or trading activity, and therefore are subject to some variance from Lord Abbett returns. In addition, Wilshire and Lord Abbett may use different pricing sources and methodologies.

Not Classified securities represent those securities which have not been assigned an official GICS Direct classification. GICS Direct, a joint product of Standard & Poor’s and MSCI, provides industry classifications for more than 40,000 companies and over 45,000 securities. Not Classified securities may include, but are not limited to: Exchange-Traded Funds (ETFs), pink sheet-listed issues, pre-IPO placements, private placements, secondary issues, open-end funds, closed-end funds, and non-operating establishments.

Under certain circumstances, Lord Abbett may elect to have Wilshire map an ETF holding to the relevant characteristics represented by that ETF’s underlying index in order to reflect the exposure and performance contributed by the ETF to the overall portfolio. When this option is selected, Wilshire will remove the ETF from the Not Classified category and instead allocate the ETF’s exposures across the relevant attributes based on the composition of the ETF’s underlying index.

Source: Wilshire Attribution Software. GICS sector classification; non-GICS securities classified by Lord Abbett. Sectors may include many industries.

Dividends & Cap Gains

Dividend Payments

For

YTD Dividends Paidas of 01/14/2021: $0
Dividend Frequency: Semi-Annually

Record Date	Ex-Dividend Date	Reinvest & Payable Date	Dividend	Reinvest Price
12/17/2020	12/18/2020	12/18/2020	$0.34670	$28.66

Upcoming Dividend Payment Dates

This section lists all anticipated income and Capital Gain distribution dates and any actual distributions are subject to adequacy of earnings and must be approved by the Board of Directors/Trustees. Please note that dates are subject to change.

Record Date	Ex-Dividend Date	Reinvest & Payable Date
07/28/2021	07/29/2021	07/29/2021
12/16/2021	12/17/2021	12/17/2021

Capital Gains Distributions

For

Record Date	Reinvest & Payable Date	Long-term	Short-term *	Total	Reinvest Price
12/17/2019	12/18/2019	$0.6596	-	$0.6596	$28.36

Taxed as ordinary income

Lord Abbett does not provide tax advice. It is strongly recommended that you discuss the impact of dividends and distributions with your tax advisor.

Upcoming Capital Gain Distribution

Record Date	Ex-Dividend Date
07/28/2021	07/29/2021

Fees & Expenses

Sales Charge Schedule as of 01/14/2021

	Sales Charge	Dealer's Concession	Prices at Breakpoint
Less than $50,000	5.75%	5.00%	$32.37
$50,000 to $99,999	4.75%	4.00%	$32.03
$100,000 to $249,999	3.95%	3.25%	$31.76
$250,000 to $499,999	2.75%	2.25%	$31.37
$500,000 to $999,999	1.95%	1.75%	$31.12
$1,000,000 to $5,000,000	0.00%	1.00%	$30.51

The 12b-1 trail commission is 0.15% (accrues immediately) for all fixed-income and municipal income funds.

Class A shares purchased without a sales charge (commissionable NAV) will be subject to a CDSC of 1% if they are redeemed before the first day of the month in which the one-year anniversary of the purchase falls.

For Sales Charge Reductions and Waivers Click here.

SALES CHARGE REDUCTIONS AND WAIVERS

Please inform the fund company or your financial intermediary at the time of your purchase of fund shares if you believe you qualify for a reduced front-end sales charge.

Reducing Your Class A Share Front-End Sales Charge
You may purchase Class A shares at a discount if you qualify under the circumstances outlined below. To receive a reduced front-end sales charge, you must let the fund or your financial intermediary know at the time of your purchase of fund shares that you believe you qualify for a discount. If you or a related party have holdings of eligible funds (as defined below) in other accounts with your financial intermediary or with other financial intermediaries that may be combined with your current purchases in determining the sales charge as described below, you must inform a fund or your financial intermediary. You may be asked to provide supporting account statements or other information to allow us or your financial intermediary to verify your eligibility for a discount. If you or your financial intermediary do not notify a fund or provide the requested information, you may not receive the reduced sales charge for which you otherwise qualify. Class A shares may be purchased at a discount if you qualify under either of the following conditions:

Rights of Accumulation - A Purchaser (as defined below) may combine thevalue of Class A, A1, C, F, and P shares of any Eligible Fund currentlyowned with a new purchase of Class A shares of any Eligible Fund in orderto reduce the sales charge on the new purchase. Class F3, I, R2, R3, R4, R5,and R6 share holdings may not be combined for these purposes.To the extent that your financial intermediary is able to do so, the value ofClass A, A1, C, F, and P shares of Eligible Funds determined for the purposeof reducing the sales charge of a new purchase under the Rights ofAccumulation will be calculated at the higher of: (1) the aggregate currentmaximum offering price of your existing Class A, A1, C, F, and P shares ofEligible Funds; or (2) the aggregate amount you invested in such shares(including dividend reinvestments but excluding capital appreciation) less anyredemptions. You should retain any information and account recordsnecessary to substantiate the historical amounts you and any relatedPurchasers have invested in Eligible Funds. You must inform the Fund and/or your financial intermediary at the time of purchase if you believe yourpurchase qualifies for a reduced sales charge and you may be requested toprovide documentation of your holdings in order to verify your eligibility. Ifyou do not do so, you may not receive all sales charge reductions for whichyou are eligible.
Letter of Intention — In order to reduce your Class A front-end salescharge, a Purchaser may combine purchases of Class A, A1, C, F, and Pshares of any Eligible Fund the Purchaser intends to make over the next13 months in determining the applicable sales charge. The 13-month Letterof Intention period commences on the day that the Letter of Intention isreceived by the Fund, and the Purchaser must tell the Fund that laterpurchases are subject to the Letter of Intention. Purchases submitted prior tothe date the Letter of Intention is received by the Fund are not countedtoward the sales charge reduction. Current holdings under Rights ofAccumulation may be included in a Letter of Intention in order to reduce thesales charge for purchases during the 13-month period covered by the Letterof Intention. Shares purchased through reinvestment of dividends ordistributions are not included. Class F3, I, R2, R3, R4, R5, and R6 shareholdings may not be combined for these purposes. Class A and A1 shares valued at up to 5% of the amount of intended purchases are escrowed andmay be redeemed to cover the additional sales charges payable if the intendedpurchases under the Letter of Intention are not completed. The Letter ofIntention is neither a binding obligation on you to buy, nor on the Fund tosell, any or all of the intended purchase amount.

Purchaser — A Purchaser includes: (1) an individual; (2) an individual, his or her spouse, domestic partner, and childrenunder the age of 21; (3) retirement and benefit plansincluding a 401(k) plan, profit-sharing plan, moneypurchase plan, defined benefit plan, and 457(b) plan sponsored by a governmental entity, non-profitorganization, school district or church to which employer contributions are made, as well as SIMPLE IRAplans and SEP-IRA plans; or (4) a trustee or other fiduciary purchasing shares for a single trust, estate orsingle fiduciary account or a trust established by the individual as grantor. An individual may include underitem (1) his or her holdings in Eligible Funds as described below in IRAs, as a sole participant of aretirement and benefit plan sponsored by the individual’s business, and as a participant in a 403(b) plan towhich only pre-tax salary deferrals are made. An individual, his or her spouse, and domestic partner mayinclude under item (2) their holdings in IRAs, and as the sole participants in retirement and benefit planssponsored by a business owned by either or both of them. A retirement and benefit plan under item (3)includes all qualified retirement and benefit plans of a single employer and its consolidated subsidiaries,and all qualified retirement and benefit plans of multiple employers registered in the name of a singlebank trustee.

Eligible fund — An eligible fund is any Lord Abbett-sponsored fund except for (1) each portfolio of Lord Abbett Series Fund, Inc., (2) Lord Abbett U.S. Government & Government Sponsored Enterprises Money Market Fund, Inc. ("Money Market Fund") (except for holdings in Money Market Fund, which are attributable to any shares exchanged from the Lord Abbett-sponsored funds), and (3) any other fund the shares of which are not available to the investor at the time of the transaction due to a limitation on the offering of a fund's shares.

Front-end Sales Charge Waivers
Class A shares may be purchased without a front-end sales charge under any of the following conditions:

purchases of $1 million or more (may be subject to a CDSC);
purchases by retirement and benefit plans with at least 100 eligible employees (may be subject to a CDSC);
purchases for retirement and benefit plans made through financial intermediaries that perform participant recordkeeping or other administrative services for the plans and that have entered into special arrangements with a fund and/or Lord Abbett Distributor specifically for such purchases (may be subject to a CDSC);
purchases made by or on behalf of financial intermediaries for clients that pay the financial intermediaries fees in connection with fee-based advisory program, provided that the financial intermediaries or their trading agents have entered into special arrangements with a fund and/or Lord Abbett Distributor specifically for such purchases; and
certain other types of investors may qualify to purchase Class A share without a front-end sales charge as described in the Statement of Additional Information (SAI).

EXPENSE RATIOas of 12/31/2020

Fund Documents

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n/a	Portfolio Holdings 1Q Publish Date:11/03/2015
n/a	Portfolio Holdings 3Q Publish Date:11/03/2015
	Summary Prospectus Publish Date:11/03/2015
n/a	Statutory Prospectus Publish Date:11/03/2015
n/a	Prospectus (XBRL) Publish Date:11/03/2015
	SAI Publish Date:11/03/2015
	Annual Report Publish Date:11/03/2015
	Semi-Annual Report Publish Date:11/03/2015
	Fact Sheet Publish Date:11/03/2015
	Commentary Publish Date:11/03/2015

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Minimum initial investment varies depending on the class of shares you buy and the type of account. IRAs, SIMPLEs, and SEP accounts with payroll deductions have no minimums. Please see Fund prospectuses for additional information.

IMPORTANT INFORMATION

A Note about Risk: The value of investments in equity securities will fluctuate in response to general economic conditions and to changes in the prospects of particular companies, including market, liquidity, currency, and political risks. Mid cap company stocks tend to be more volatile and may be less liquid than large cap company stocks. Mid cap companies typically experience a higher risk of failure than large cap companies. Investments in value companies can continue to be undervalued for long periods of time and be more volatile than the stock market in general. These factors can adversely affect Fund performance.

Performance data quoted is historical. Past performance is not indicative of future results. Current performance may be higher or lower than the performance quoted. The investment return and principal value of an investment in the Fund will fluctuate so that shares, on any given day or when redeemed, may be worth more or less than their original cost. To obtain performance data current to the most recent quarter-end, go to quarter ending performance on our Website or call Lord Abbett at (888) 522-2388.

CUSIP identifiers have been provided by CUSIP Global Services, managed on behalf of the American Bankers Association by Standard & Poor’s Financial Services, LLC, and are not for use or dissemination in a manner that would serve as a substitute for any CUSIP service. The CUSIP Database, © 2011 American Bankers Association. “CUSIP” is a registered trademark of the American Bankers Association.

Class A Except as noted below, returns with sales charges reflect a maximum sales charge of 5.75% for equity funds, 2.25% for all tax-free income funds, fixed income funds and multi-asset class funds. There are also ongoing 12b-1 service fees (and, in certain cases, distribution fees).

Class A Shares purchased subject to a front-end sales charge have no contingent deferred sales charge (CDSC). However, certain purchases of Class A shares made without a front-end sales charge may be subject to a CDSC of 1% if the shares are redeemed before the first day of the month in which the one year anniversary of the purchase falls. The CDSC is not reflected in the performance with maximum sales charge.

With Sales Charge - Returns with sales charges reflect applicable fees and expenses and include all distributions reinvested.

Without Sales Charge - Returns shown are without sales charges and have all distributions reinvested. If a sales charge had been deducted, the results would have been lower.

Returns shown at less than a year reflect aggregate total returns.

Double-Digit Returns - instances of high double-digit returns were achieved primarily during favorable market conditions and may not be sustainable over time.

The Russell Midcap® Value Index measures the performance of those Russell Midcap companies with lower price-to-book ratios and lower forecasted growth values. The stocks are also members of the Russell 1000 Value index.

Indexes reflect total return, unless otherwise specified, with all dividends reinvested. Indexes are unmanaged, do not reflect the deduction of fees or expenses, and are not available for direct investment.

Lipper Category Average - Peer group averages are based on universes of funds with the same investment objectives. The average return for the peer group is based on the returns of each individual fund within the group for the period shown. This average assumes reinvestment of dividends.

Fund Expense Ratio Detail: Reflects expenses for the Fund's fiscal year-end and is subject to change. Fund expenses may fluctuate with market volatility. A substantial reduction in Fund assets (since its most recently completed fiscal year), whether caused by market conditions or significant redemptions or both, will likely cause total operating expenses (as a percentage of Fund assets) to become higher than those shown.

Lipper Category Average Expense Ratio reflects the average net expenses of Class A shares of all funds with in the peer group based on Lipper data available.

The Fund's portfolio is actively managed and portfolio characteristics, such as individual holdings and sector weightings may change significantly over time. The portfolio data is for information only. It does not constitute a recommendation or an offer for a particular security or fund, nor should it be taken as a solicitation or recommendation to buy or sell securities or other investments.

Dividends and Capital Gains: The information presented in this section is intended for general information and is not intended to be relied upon and should not be relied upon, as financial, legal or tax advice for any particular investor. We strongly recommend that you contact your financial, legal or tax advisor regarding your particular tax situation.

The information presented in this section is not written or intended to be used, and cannot be used, for the purpose of avoiding any tax liabilities or penalties.

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Securing a sustainable future forour clients, our people, and our world. Inspired by our mission, we are committed to creating long-term financial security for our clients, empowering our people, advancing our communities, and ensuring a vibrant future for our planet.

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Summary

Summary

What is the Mid Cap Stock Fund?

The Fund seeks to deliver long-term growth of capital by investing primarily in stocks of mid-sized U.S. companies.

Fund Basicsas of 12/31/2020

Expense Ratioas of 12/31/2020

Fund Expense Ratio :

0.98%

Fund Expense Ratio :

0.98%

Fund Expense Ratio :

0.98%

Fund Expense Ratio :

0.98%

TEN LARGEST HOLDINGS as of 12/31/2020View Portfolio

Sector Allocationas of 12/31/2020View Portfolio

INVESTMENT TEAM

Your Representative

Performance

Performance

Fund Expense Ratio :

0.98%

Fund Expense Ratio :

0.98%

Fund Expense Ratio :

0.98%

Fund Expense Ratio :

0.98%

Growth of $10,000 as of 12/31/2020

NAV HISTORICAL PRICES

Portfolio

Portfolio

SECTOR ALLOCATIONas of 12/31/2020

Portfolio Positioning as of 06/30/2020

PORTFOLIO DETAILS as of 12/31/2020

Contributors & Detractors as of 12/31/2020

Contributors

Detractors

Attribution Analysis

Dividends & Cap Gains

Dividends & Cap Gains

Dividend Payments

Upcoming Dividend Payment Dates

Capital Gains Distributions

Upcoming Capital Gain Distribution

Fees & Expenses

Fees & Expenses

Sales Charge Schedule as of 01/14/2021

EXPENSE RATIOas of 12/31/2020

Fund Documents

Securing a sustainable future for
our clients, our people, and our world.

Inspired by our mission, we are committed to creating long-term financial security for our clients, empowering our people, advancing our communities, and ensuring a vibrant future for our planet.