Frequently Asked Questions About MIGHX

What are the top holdings of MIGHX?

A machine-readable holdings disclosure for Massachusetts Investors Growth Stock Fund Class R3 (MIGHX) is not available from our data sources. Fund families sometimes register portfolio filings under a sibling share class or outside the SEC's structured datasets. Rather than estimate, we leave the section blank; the issuer's website carries the authoritative portfolio list.

What sectors does MIGHX invest in?

Massachusetts Investors Growth Stock Fund Class R3 (MIGHX) allocates across the sectors shown above. The largest exposure tops the list; the rest follow in descending weight order.

What sector is MIGHX most exposed to?

MIGHX's full sector breakdown is on the Sectors tab. The largest sector weight is shown there along with the rest of the allocation.

Is MIGHX a US-only fund?

The country allocation card on this page shows MIGHX's geographic exposure. Funds with > 95% US weight are effectively US-only; international or global funds will show meaningful weights across multiple countries.

What does MIGHX invest in?

This fund typically commits at least 80% of its total net assets to equity investments. Such investments cover common shares and various other securities that grant an ownership stake or the potential to obtain one in a company or other issuing entity. The advisor's primary investment approach involves targeting companies believed to possess earnings growth prospects that surpass those of the average company, commonly known as growth companies.

MIGHX

Massachusetts Investors Growth Stock Fund Class R3

NASDAQ·Asset Management · Financial Services

$40.42$0.44−1.08%

Market closed·Oct 16 4:00 PM EDT

Portfolio as of February 28, 2026, from the fund's SEC Form N-PORT filing. Funds disclose holdings quarterly, with a ~60-day publication delay. Sector breakdowns aren't part of this filing, so none is shown.

Top Holdings

holdings

594918104
Microsoft Corp.
11.60%
67066G104
NVIDIA Corp.
10.99%
037833100
Apple, Inc.
4.58%
874039100
Taiwan Semiconductor Manufacturing Co. Ltd.
4.49%
02079K305
Alphabet, Inc.
3.91%
032095101
Amphenol Corp.
3.83%
92826C839
Visa, Inc.
3.51%
IE00B4BNMY34
Accenture plc
2.72%
IE00BLP1HW54
Aon plc
2.67%
89400J107
TransUnion
2.45%
Other
46 more holdings
50.17%

Top 10 holdings

50.75%

Top 25 holdings

79.06%

Concentration index

0.0428

Effective holdings

Chart tools

Open Top Holdings in Chart Builder to fine-tune colors, labels, and timeframe, then download a high-res PNG.

All Holdings (57)

#	TickerHolding	Name	Weight	Shares	Market Value
1	594918104594918104Microsoft Corp.	Microsoft Corp.	11.60%	2.92M	$1.15B
2	67066G10467066G104NVIDIA Corp.	NVIDIA Corp.	10.99%	6.12M	$1.08B
3	037833100037833100Apple, Inc.	Apple, Inc.	4.58%	1.71M	$451.79M
4	874039100874039100Taiwan Semiconductor Manufacturing Co. Ltd.	Taiwan Semiconductor Manufacturing Co. Ltd.	4.49%	1.18M	$442.98M
5	02079K30502079K305Alphabet, Inc.	Alphabet, Inc.	3.91%	1.24M	$386.12M
6	032095101032095101Amphenol Corp.	Amphenol Corp.	3.83%	2.59M	$378.47M
7	92826C83992826C839Visa, Inc.	Visa, Inc.	3.51%	1.08M	$346.47M
8	IE00B4BNMY34IE00B4BNMY34Accenture plc	Accenture plc	2.72%	1.29M	$268.55M
9	IE00BLP1HW54IE00BLP1HW54Aon plc	Aon plc	2.67%	785.00K	$263.34M
10	89400J10789400J107TransUnion	TransUnion	2.45%	3.08M	$241.79M
11	443510607443510607Hubbell, Inc.	Hubbell, Inc.	2.38%	459.74K	$235.22M
12	171340102171340102Church & Dwight Co., Inc.	Church & Dwight Co., Inc.	2.29%	2.15M	$225.69M
13	125896100125896100CMS Energy Corp.	CMS Energy Corp.	2.21%	2.79M	$217.79M
14	57636Q10457636Q104Mastercard, Inc.	Mastercard, Inc.	2.16%	413.07K	$213.65M
15	IE00B8KQN827IE00B8KQN827Eaton Corp. plc	Eaton Corp. plc	2.01%	528.94K	$198.84M
16	023135106023135106Amazon.com, Inc.	Amazon.com, Inc.	1.95%	916.10K	$192.38M
17	43300A20343300A203Hilton Worldwide Holdings, Inc.	Hilton Worldwide Holdings, Inc.	1.90%	600.69K	$187.28M
18	00846U10100846U101Agilent Technologies, Inc.	Agilent Technologies, Inc.	1.86%	1.51M	$183.65M
19	615369105615369105Moody's Corp.	Moody's Corp.	1.85%	383.00K	$182.92M
20	KYG875721634KYG875721634Tencent Holdings Ltd.	Tencent Holdings Ltd.	1.72%	2.57M	$21.76M

Showing 20 of 57

Sectors

The fund issuer's factsheet may carry this breakdown directly.

Countries

countries

United States
79.81%
Ireland
10.11%
Taiwan
4.49%
France
3.93%
Cayman Islands
1.72%
Canada
0.85%

Top 3 countries

94.41%

Top 5 countries

100.06%

Concentration index

0.6394

Effective countries

Chart tools

Open Country Allocation in Chart Builder to fine-tune colors, labels, and timeframe, then download a high-res PNG.

Asset Classes

Primary asset class

Equity

Strategy

Thematic

Income strategy

No income focus

Frequently Asked Questions About MIGHX

What are the top holdings of MIGHX?: A machine-readable holdings disclosure for Massachusetts Investors Growth Stock Fund Class R3 (MIGHX) is not available from our data sources. Fund families sometimes register portfolio filings under a sibling share class or outside the SEC's structured datasets. Rather than estimate, we leave the section blank; the issuer's website carries the authoritative portfolio list.
What sectors does MIGHX invest in?: Massachusetts Investors Growth Stock Fund Class R3 (MIGHX) allocates across the sectors shown above. The largest exposure tops the list; the rest follow in descending weight order.
What sector is MIGHX most exposed to?: MIGHX's full sector breakdown is on the Sectors tab. The largest sector weight is shown there along with the rest of the allocation.
Is MIGHX a US-only fund?: The country allocation card on this page shows MIGHX's geographic exposure. Funds with > 95% US weight are effectively US-only; international or global funds will show meaningful weights across multiple countries.
What does MIGHX invest in?: This fund typically commits at least 80% of its total net assets to equity investments. Such investments cover common shares and various other securities that grant an ownership stake or the potential to obtain one in a company or other issuing entity. The advisor's primary investment approach involves targeting companies believed to possess earnings growth prospects that surpass those of the average company, commonly known as growth companies.

TickerHolding

Name

Weight

Market Value

594918104594918104Microsoft Corp.

Microsoft Corp.

11.60%

2.92M

$1.15B

67066G10467066G104NVIDIA Corp.

NVIDIA Corp.

10.99%

6.12M

$1.08B

037833100037833100Apple, Inc.

Apple, Inc.

4.58%

1.71M

$451.79M

874039100874039100Taiwan Semiconductor Manufacturing Co. Ltd.

Taiwan Semiconductor Manufacturing Co. Ltd.

4.49%

1.18M

$442.98M

02079K30502079K305Alphabet, Inc.

Alphabet, Inc.

3.91%

1.24M

$386.12M

032095101032095101Amphenol Corp.

Amphenol Corp.

3.83%

2.59M

$378.47M

92826C83992826C839Visa, Inc.

Visa, Inc.

3.51%

1.08M

$346.47M

IE00B4BNMY34IE00B4BNMY34Accenture plc

Accenture plc

2.72%

1.29M

$268.55M

IE00BLP1HW54IE00BLP1HW54Aon plc

Aon plc

2.67%

785.00K

$263.34M

89400J10789400J107TransUnion

TransUnion

2.45%

3.08M

$241.79M

443510607443510607Hubbell, Inc.

Hubbell, Inc.

2.38%

459.74K

$235.22M

171340102171340102Church & Dwight Co., Inc.

Church & Dwight Co., Inc.

2.29%

2.15M

$225.69M

125896100125896100CMS Energy Corp.

CMS Energy Corp.

2.21%

2.79M

$217.79M

57636Q10457636Q104Mastercard, Inc.

Mastercard, Inc.

2.16%

413.07K

$213.65M

IE00B8KQN827IE00B8KQN827Eaton Corp. plc

Eaton Corp. plc

2.01%

528.94K

$198.84M

023135106023135106Amazon.com, Inc.

Amazon.com, Inc.

1.95%

916.10K

$192.38M

43300A20343300A203Hilton Worldwide Holdings, Inc.

Hilton Worldwide Holdings, Inc.

1.90%

600.69K

$187.28M

00846U10100846U101Agilent Technologies, Inc.

Agilent Technologies, Inc.

1.86%

1.51M

$183.65M

615369105615369105Moody's Corp.

Moody's Corp.

1.85%

383.00K

$182.92M

KYG875721634KYG875721634Tencent Holdings Ltd.

Tencent Holdings Ltd.

1.72%

2.57M

$21.76M