Frequently Asked Questions About MFRFX

What are the top holdings of MFRFX?

A machine-readable holdings disclosure for MFS Research Fund Class A (MFRFX) 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 MFRFX invest in?

MFS Research Fund Class A (MFRFX) allocates across the sectors shown above. The largest exposure tops the list; the rest follow in descending weight order.

What sector is MFRFX most exposed to?

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

Is MFRFX a US-only fund?

The country allocation card on this page shows MFRFX'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 MFRFX invest in?

The fund's main goal is to generate growth in its capital for investors. It typically accomplishes this by primarily dedicating its assets to equity-based investments. These equity investments encompass both common stocks and other financial instruments that either signify an ownership stake or provide the potential to acquire one in a company or similar entity.

MFRFX

MFS Research Fund Class A

NASDAQ·Asset Management · Financial Services

$61.40$0.07+0.11%

Market closed·Oct 28 4:00 PM EDT

Portfolio as of June 30, 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

67066G104
NVIDIA Corp.
8.38%
037833100
Apple, Inc.
6.89%
02079K305
Alphabet, Inc.
5.02%
594918104
Microsoft Corp.
4.83%
023135106
Amazon.com, Inc.
4.41%
11135F101
Broadcom, Inc.
3.51%
46625H100
JPMorgan Chase & Co.
2.32%
482480100
KLA Corp.
2.27%
57636Q104
Mastercard, Inc.
2.26%
30303M102
Meta Platforms, Inc.
2.15%
Other
88 more holdings
58.26%

Top 10 holdings

42.05%

Top 25 holdings

60.13%

Concentration index

0.0264

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 (99)

#	TickerHolding	Name	Weight	Shares	Market Value
1	67066G10467066G104NVIDIA Corp.	NVIDIA Corp.	8.38%	3.30M	$660.24M
2	037833100037833100Apple, Inc.	Apple, Inc.	6.89%	1.88M	$543.10M
3	02079K30502079K305Alphabet, Inc.	Alphabet, Inc.	5.02%	1.11M	$395.24M
4	594918104594918104Microsoft Corp.	Microsoft Corp.	4.83%	1.02M	$380.13M
5	023135106023135106Amazon.com, Inc.	Amazon.com, Inc.	4.41%	1.46M	$347.72M
6	11135F10111135F101Broadcom, Inc.	Broadcom, Inc.	3.51%	732.00K	$276.51M
7	46625H10046625H100JPMorgan Chase & Co.	JPMorgan Chase & Co.	2.32%	558.60K	$182.85M
8	482480100482480100KLA Corp.	KLA Corp.	2.27%	591.79K	$178.55M
9	57636Q10457636Q104Mastercard, Inc.	Mastercard, Inc.	2.26%	347.40K	$178.42M
10	30303M10230303M102Meta Platforms, Inc.	Meta Platforms, Inc.	2.15%	301.06K	$169.58M
11	007903107007903107Advanced Micro Devices, Inc.	Advanced Micro Devices, Inc.	2.05%	277.37K	$161.13M
12	060505104060505104Bank of America Corp.	Bank of America Corp.	1.47%	2.04M	$116.09M
13	595112103595112103Micron Technology, Inc.	Micron Technology, Inc.	1.43%	97.50K	$112.54M
14	30231G10230231G102Exxon Mobil Corp.	Exxon Mobil Corp.	1.32%	762.73K	$104.28M
15	478160104478160104Johnson & Johnson	Johnson & Johnson	1.32%	408.33K	$103.70M
16	040413205040413205Arista Networks, Inc.	Arista Networks, Inc.	1.30%	602.95K	$102.43M
17	84615Q10384615Q103Space Exploration Technologies Corp.	Space Exploration Technologies Corp.	1.22%	561.92K	$96.01M
18	IE00BKVD2N49IE00BKVD2N49Seagate Technology Holdings plc	Seagate Technology Holdings plc	1.21%	99.16K	$95.69M
19	149123101149123101Caterpillar, Inc.	Caterpillar, Inc.	1.19%	87.97K	$93.68M
20	032095101032095101Amphenol Corp.	Amphenol Corp.	1.02%	453.91K	$80.03M

Showing 20 of 99

Sectors

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

Countries

countries

United States
90.61%
Ireland
5.77%
Canada
0.95%
Switzerland
0.91%
Luxembourg
0.90%
Bermuda
0.53%
Jersey
0.47%
United Kingdom
0.17%

Top 3 countries

97.33%

Top 5 countries

99.14%

Concentration index

0.8196

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

Actively Managed

Income strategy

No income focus

Frequently Asked Questions About MFRFX

What are the top holdings of MFRFX?: A machine-readable holdings disclosure for MFS Research Fund Class A (MFRFX) 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 MFRFX invest in?: MFS Research Fund Class A (MFRFX) allocates across the sectors shown above. The largest exposure tops the list; the rest follow in descending weight order.
What sector is MFRFX most exposed to?: MFRFX's full sector breakdown is on the Sectors tab. The largest sector weight is shown there along with the rest of the allocation.
Is MFRFX a US-only fund?: The country allocation card on this page shows MFRFX'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 MFRFX invest in?: The fund's main goal is to generate growth in its capital for investors. It typically accomplishes this by primarily dedicating its assets to equity-based investments. These equity investments encompass both common stocks and other financial instruments that either signify an ownership stake or provide the potential to acquire one in a company or similar entity.

TickerHolding

Name

Weight

Market Value

67066G10467066G104NVIDIA Corp.

NVIDIA Corp.

8.38%

3.30M

$660.24M

037833100037833100Apple, Inc.

Apple, Inc.

6.89%

1.88M

$543.10M

02079K30502079K305Alphabet, Inc.

Alphabet, Inc.

5.02%

1.11M

$395.24M

594918104594918104Microsoft Corp.

Microsoft Corp.

4.83%

1.02M

$380.13M

023135106023135106Amazon.com, Inc.

Amazon.com, Inc.

4.41%

1.46M

$347.72M

11135F10111135F101Broadcom, Inc.

Broadcom, Inc.

3.51%

732.00K

$276.51M

46625H10046625H100JPMorgan Chase & Co.

JPMorgan Chase & Co.

2.32%

558.60K

$182.85M

482480100482480100KLA Corp.

KLA Corp.

2.27%

591.79K

$178.55M

57636Q10457636Q104Mastercard, Inc.

Mastercard, Inc.

2.26%

347.40K

$178.42M

30303M10230303M102Meta Platforms, Inc.

Meta Platforms, Inc.

2.15%

301.06K

$169.58M

007903107007903107Advanced Micro Devices, Inc.

Advanced Micro Devices, Inc.

2.05%

277.37K

$161.13M

060505104060505104Bank of America Corp.

Bank of America Corp.

1.47%

2.04M

$116.09M

595112103595112103Micron Technology, Inc.

Micron Technology, Inc.

1.43%

97.50K

$112.54M

30231G10230231G102Exxon Mobil Corp.

Exxon Mobil Corp.

1.32%

762.73K

$104.28M

478160104478160104Johnson & Johnson

Johnson & Johnson

1.32%

408.33K

$103.70M

040413205040413205Arista Networks, Inc.

Arista Networks, Inc.

1.30%

602.95K

$102.43M

84615Q10384615Q103Space Exploration Technologies Corp.

Space Exploration Technologies Corp.

1.22%

561.92K

$96.01M

IE00BKVD2N49IE00BKVD2N49Seagate Technology Holdings plc

Seagate Technology Holdings plc

1.21%

99.16K

$95.69M

149123101149123101Caterpillar, Inc.

Caterpillar, Inc.

1.19%

87.97K

$93.68M

032095101032095101Amphenol Corp.

Amphenol Corp.

1.02%

453.91K

$80.03M