Supplement to the

Fidelity^® Small Cap Discovery Fund (FSCRX)
A Fund of Fidelity Commonwealth Trust

STATEMENT OF ADDITIONAL INFORMATION

June 29, 2015

The following information supplements similar information found in the "Management Contracts" section beginning on page 39.

Effective March 7, 2016, Derek Janssen has been named interim portfolio manager of Fidelity Small Cap Discovery Fund while the fund's portfolio manager, Mr. Myers, is on a leave of absence from the firm. Mr. Myers is expected to return in the third quarter of 2016. Due to the interim nature of his appointment to this fund, Mr. Janssen will not receive compensation for his services to Fidelity Small Cap Discovery Fund. As of March 31, 2016, portfolio manager compensation generally consists of a fixed base salary determined periodically (typically annually), a bonus, in certain cases, participation in several types of equity-based compensation plans, and, if applicable, relocation plan benefits. A portion of the portfolio manager's compensation may be deferred based on criteria established by FMR or at the election of the portfolio manager.

The portfolio manager's base salary is determined by level of responsibility and tenure at FMR or its affiliates. The primary components of the portfolio manager's bonus are based on the pre-tax investment performance of the portfolio manager's fund(s) and account(s) measured against a benchmark index and within a defined peer group assigned to each fund or account. The pre-tax investment performance of the portfolio manager's fund(s) and account(s) is weighted according to his tenure on those fund(s) and account(s) and the average asset size of those fund(s) and account(s) over his tenure. Each component is calculated separately over the portfolio manager's tenure on those fund(s) and account(s) over a measurement period that initially is contemporaneous with his tenure, but that eventually encompasses rolling periods of up to five years for the comparison to a benchmark index and rolling periods of up to three years for the comparison to a peer group. A smaller, subjective component of the portfolio manager's bonus is based on the portfolio manager's overall contribution to management of FMR. The portfolio manager also is compensated under equity-based compensation plans linked to increases or decreases in the net asset value of the stock of FMR LLC, FMR's parent company. FMR LLC is a diverse financial services company engaged in various activities that include fund management, brokerage, retirement, and employer administrative services. If requested to relocate their primary residence, portfolio managers also may be eligible to receive benefits, such as home sale assistance and payment of certain moving expenses, under relocation plans for most full-time employees of FMR LLC and its affiliates.

The portfolio manager's compensation plan may give rise to potential conflicts of interest. Although investors in the fund may invest through either tax-deferred accounts or taxable accounts, the portfolio manager's compensation is linked to the pre-tax performance of the fund, rather than its after-tax performance. The portfolio manager's base pay tends to increase with additional and more complex responsibilities that include increased assets under management and a portion of the bonus relates to marketing efforts, which together indirectly link compensation to sales. When a portfolio manager takes over a fund or an account, the time period over which performance is measured may be adjusted to provide a transition period in which to assess the portfolio. The management of multiple funds and accounts (including proprietary accounts) may give rise to potential conflicts of interest if the funds and accounts have different objectives, benchmarks, time horizons, and fees as the portfolio manager must allocate his time and investment ideas across multiple funds and accounts. In addition, a fund's trade allocation policies and procedures may give rise to conflicts of interest if the fund's orders do not get fully executed due to being aggregated with those of other accounts managed by FMR or an affiliate. The portfolio manager may execute transactions for another fund or account that may adversely impact the value of securities held by a fund. Securities selected for other funds or accounts may outperform the securities selected for the fund. Portfolio managers may be permitted to invest in the funds they manage, even if a fund is closed to new investors. Trading in personal accounts, which may give rise to potential conflicts of interest, is restricted by a fund's Code of Ethics.

The following table provides information relating to other accounts managed by Mr. Janssen as of March 31, 2016:

	Registered Investment Companies*	Other Pooled Investment Vehicles	Other Accounts
Number of Accounts Managed	3	none	none
Number of Accounts Managed with Performance-Based Advisory Fees	2	none	none
Assets Managed (in millions)	$ 9,858	none	none
Assets Managed with Performance-Based Advisory Fees (in millions)	$ 8,319	none	none

* Includes Fidelity Small Cap Discovery Fund ($5,279 (in millions) assets managed).

As of March 31, 2016, the dollar range of shares of Fidelity Small Cap Discovery Fund beneficially owned by Mr. Janssen was $10,000 - $50,000.

SMRB-16-01		May 13, 2016
1.782324.111

Supplement to the

Fidelity^® Series Small Cap Discovery Fund (FJACX)

A Class of Shares of Fidelity Series Small Cap Discovery Fund

A Fund of Fidelity Commonwealth Trust

STATEMENT OF ADDITIONAL INFORMATION

June 29, 2015

The following information supplements similar information found in the "Management Contracts" section beginning on page 36.

Effective March 7, 2016, Derek Janssen has been named interim portfolio manager of Fidelity Series Small Cap Discovery Fund while the fund's portfolio manager, Mr. Myers, is on a leave of absence from the firm. Mr. Myers is expected to return in the third quarter of 2016. Due to the interim nature of his appointment to this fund, Mr. Janssen will not receive compensation for his services to Fidelity Series Small Cap Discovery Fund. As of March 31, 2016, portfolio manager compensation generally consists of a fixed base salary determined periodically (typically annually), a bonus, in certain cases, participation in several types of equity-based compensation plans, and, if applicable, relocation plan benefits. A portion of the portfolio manager's compensation may be deferred based on criteria established by FMR or at the election of the portfolio manager.

The portfolio manager's base salary is determined by level of responsibility and tenure at FMR or its affiliates. The primary components of the portfolio manager's bonus are based on the pre-tax investment performance of the portfolio manager's fund(s) and account(s) measured against a benchmark index and within a defined peer group assigned to each fund or account. The pre-tax investment performance of the portfolio manager's fund(s) and account(s) is weighted according to his tenure on those fund(s) and account(s) and the average asset size of those fund(s) and account(s) over his tenure. Each component is calculated separately over the portfolio manager's tenure on those fund(s) and account(s) over a measurement period that initially is contemporaneous with his tenure, but that eventually encompasses rolling periods of up to five years for the comparison to a benchmark index and rolling periods of up to three years for the comparison to a peer group. A smaller, subjective component of the portfolio manager's bonus is based on the portfolio manager's overall contribution to management of FMR. The portfolio manager also is compensated under equity-based compensation plans linked to increases or decreases in the net asset value of the stock of FMR LLC, FMR's parent company. FMR LLC is a diverse financial services company engaged in various activities that include fund management, brokerage, retirement, and employer administrative services. If requested to relocate their primary residence, portfolio managers also may be eligible to receive benefits, such as home sale assistance and payment of certain moving expenses, under relocation plans for most full-time employees of FMR LLC and its affiliates.

The portfolio manager's compensation plan may give rise to potential conflicts of interest. The portfolio manager's compensation is linked to the pre-tax performance of the fund, rather than its after-tax performance. The portfolio manager's base pay tends to increase with additional and more complex responsibilities that include increased assets under management and a portion of the bonus relates to marketing efforts, which together indirectly link compensation to sales. When a portfolio manager takes over a fund or an account, the time period over which performance is measured may be adjusted to provide a transition period in which to assess the portfolio. The management of multiple funds and accounts (including proprietary accounts) may give rise to potential conflicts of interest if the funds and accounts have different objectives, benchmarks, time horizons, and fees as the portfolio manager must allocate his time and investment ideas across multiple funds and accounts. In addition, a fund's trade allocation policies and procedures may give rise to conflicts of interest if the fund's orders do not get fully executed due to being aggregated with those of other accounts managed by FMR or an affiliate. The portfolio manager may execute transactions for another fund or account that may adversely impact the value of securities held by a fund. Securities selected for other funds or accounts may outperform the securities selected for the fund. Portfolio managers may be permitted to invest in the funds they manage, even if a fund is closed to new investors. Trading in personal accounts, which may give rise to potential conflicts of interest, is restricted by a fund's Code of Ethics.

The following table provides information relating to other accounts managed by Mr. Janssen as of March 31, 2016:

	Registered Investment Companies*	Other Pooled Investment Vehicles	Other Accounts
Number of Accounts Managed	3	none	none
Number of Accounts Managed with Performance-Based Advisory Fees	2	none	none
Assets Managed (in millions)	$ 9,858	none	none
Assets Managed with Performance-Based Advisory Fees (in millions)	$ 8,319	none	none

* Includes Fidelity Series Small Cap Discovery Fund ($1,539 (in millions) assets managed).

As of March 31, 2016, the dollar range of shares of Fidelity Small Cap Discovery Fund beneficially owned by Mr. Janssen was none.

XS4B-16-01		May 13, 2016
1.9870281.100

Supplement to the

Fidelity^® Series Small Cap Discovery Fund

Class F (FJAKX)

A Fund of Fidelity Commonwealth Trust

STATEMENT OF ADDITIONAL INFORMATION

June 29, 2015

The following information supplements similar information found in the "Management Contracts" section beginning on page 36.

Effective March 7, 2016, Derek Janssen has been named interim portfolio manager of Fidelity Series Small Cap Discovery Fund while the fund's portfolio manager, Mr. Myers, is on a leave of absence from the firm. Mr. Myers is expected to return in the third quarter of 2016. Due to the interim nature of his appointment to this fund, Mr. Janssen will not receive compensation for his services to Fidelity Series Small Cap Discovery Fund. As of March 31, 2016, portfolio manager compensation generally consists of a fixed base salary determined periodically (typically annually), a bonus, in certain cases, participation in several types of equity-based compensation plans, and, if applicable, relocation plan benefits. A portion of the portfolio manager's compensation may be deferred based on criteria established by FMR or at the election of the portfolio manager.

The portfolio manager's base salary is determined by level of responsibility and tenure at FMR or its affiliates. The primary components of the portfolio manager's bonus are based on the pre-tax investment performance of the portfolio manager's fund(s) and account(s) measured against a benchmark index and within a defined peer group assigned to each fund or account. The pre-tax investment performance of the portfolio manager's fund(s) and account(s) is weighted according to his tenure on those fund(s) and account(s) and the average asset size of those fund(s) and account(s) over his tenure. Each component is calculated separately over the portfolio manager's tenure on those fund(s) and account(s) over a measurement period that initially is contemporaneous with his tenure, but that eventually encompasses rolling periods of up to five years for the comparison to a benchmark index and rolling periods of up to three years for the comparison to a peer group. A smaller, subjective component of the portfolio manager's bonus is based on the portfolio manager's overall contribution to management of FMR. The portfolio manager also is compensated under equity-based compensation plans linked to increases or decreases in the net asset value of the stock of FMR LLC, FMR's parent company. FMR LLC is a diverse financial services company engaged in various activities that include fund management, brokerage, retirement, and employer administrative services. If requested to relocate their primary residence, portfolio managers also may be eligible to receive benefits, such as home sale assistance and payment of certain moving expenses, under relocation plans for most full-time employees of FMR LLC and its affiliates.

The portfolio manager's compensation plan may give rise to potential conflicts of interest. The portfolio manager's compensation is linked to the pre-tax performance of the fund, rather than its after-tax performance. The portfolio manager's base pay tends to increase with additional and more complex responsibilities that include increased assets under management and a portion of the bonus relates to marketing efforts, which together indirectly link compensation to sales. When a portfolio manager takes over a fund or an account, the time period over which performance is measured may be adjusted to provide a transition period in which to assess the portfolio. The management of multiple funds and accounts (including proprietary accounts) may give rise to potential conflicts of interest if the funds and accounts have different objectives, benchmarks, time horizons, and fees as the portfolio manager must allocate his time and investment ideas across multiple funds and accounts. In addition, a fund's trade allocation policies and procedures may give rise to conflicts of interest if the fund's orders do not get fully executed due to being aggregated with those of other accounts managed by FMR or an affiliate. The portfolio manager may execute transactions for another fund or account that may adversely impact the value of securities held by a fund. Securities selected for other funds or accounts may outperform the securities selected for the fund. Portfolio managers may be permitted to invest in the funds they manage, even if a fund is closed to new investors. Trading in personal accounts, which may give rise to potential conflicts of interest, is restricted by a fund's Code of Ethics.

The following table provides information relating to other accounts managed by Mr. Janssen as of March 31, 2016:

	Registered Investment Companies*	Other Pooled Investment Vehicles	Other Accounts
Number of Accounts Managed	3	none	none
Number of Accounts Managed with Performance-Based Advisory Fees	2	none	none
Assets Managed (in millions)	$ 9,858	none	none
Assets Managed with Performance-Based Advisory Fees (in millions)	$ 8,319	none	none

* Includes Fidelity Series Small Cap Discovery Fund ($1,539 (in millions) assets managed).

As of March 31, 2016, the dollar range of shares of Fidelity Small Cap Discovery Fund beneficially owned by Mr. Janssen was none.

XS4-FB-16-01		May 13, 2016
1.9870282.100