11-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

____________________________________________________

FORM 11-K

FOR ANNUAL REPORTS OF EMPLOYEE STOCK PURCHASE, SAVINGS AND SIMILAR PLANS

PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

(mark one)

[ X ] Annual Report Pursuant to Section 15(d) of the Securities Exchange Act of 1934 for the Fiscal Year Ended December 31, 2015

[ ] Transition Report Pursuant to Section 15(d) of the Securities Exchange Act of 1934

Commission File Number 1-8002

THERMO FISHER SCIENTIFIC INC. 401(k) RETIREMENT PLAN

A. Full title of the plan and address of the plan, if different from that of the issuer named below:

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

B. Name of issuer of the securities held pursuant to the plan and the address of the principal executive office:

Thermo Fisher Scientific Inc.

81 Wyman Street

Waltham, Massachusetts 02451

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

December 31, 2015 and 2014

Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed by the undersigned hereunto duly authorized.

THERMO FISHER SCIENTIFIC INC. 401(k) RETIREMENT PLAN

By: Thermo Fisher Scientific Inc., Pension Committee

By: /s/ Stephen Williamson

Stephen Williamson    

Senior Vice President, Chief Financial Officer and

Member of the Pension Committee

Date: June 16, 2016

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Financial Statements and Supplemental Schedule

December 31, 2015 and 2014

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Index

	Page
Report of Independent Registered Public Accounting Firm	1
Financial Statements
Statements of Net Assets Available for Benefits at December 31, 2015 and 2014	2
Statement of Changes in Net Assets Available for Benefits for the Year Ended December 31, 2015	3
Notes to Financial Statements	4
Supplemental Schedule*
Schedule H, Line 4i – Schedule of Assets (Held at End of Year)	12

*Other supplemental schedules required by Section 2520.103.10 of the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974 have been omitted because they are not applicable.

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Report of Independent Registered Public Accounting Firm

To the Administrator of the Thermo Fisher Scientific Inc. 401(k) Retirement Plan

and the Pension Committee of Thermo Fisher Scientific Inc.

In our opinion, the accompanying statements of net assets available for benefits and the related statement of changes in net assets available for benefits present fairly, in all material respects, the net assets available for benefits of the Thermo Fisher Scientific Inc. 401(k) Retirement Plan (the “Plan”) at December 31, 2015 and December 31, 2014, and the changes in net assets available for benefits for the year ended December 31, 2015 in conformity with accounting principles generally accepted in the United States of America. These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

The supplemental Schedule H, Line 4i - Schedule of Assets (Held at End of Year) at December 31, 2015 has been subjected to audit procedures performed in conjunction with the audit of the Plan’s financial statements. The supplemental schedule is the responsibility of the Plan’s management. Our audit procedures included determining whether the supplemental schedule reconciles to the financial statements or the underlying accounting and other records, as applicable, and performing procedures to test the completeness and accuracy of the information presented in the supplemental schedule. In forming our opinion on the supplemental schedule, we evaluated whether the supplemental schedule, including its form and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the Schedule H, Line 4i - Schedule of Assets (Held at End of Year) at December 31, 2015 is fairly stated, in all material respects, in relation to the financial statements as a whole.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

June 16, 2016

1

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Statements of Net Assets Available for Benefits

December 31, 2015 and 2014

(In thousands)	2015		2014
Assets
Cash	$	156	$	60
Investments, at fair value	3,196,417		2,238,417
Receivables
Employer contributions	3,323		3,823
Participant contributions	88		3,152
Notes receivable from participants	45,775		35,751
	49,186		42,726
Net assets available for benefits	$	3,245,759	$	2,281,203

The accompanying notes are an integral part of these financial statements.

2

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Statement of Changes in Net Assets Available for Benefits

For the Year Ended December 31, 2015

(In thousands)	2015
Additions
Investment income
Dividends and interest income	$	19,814
Net appreciation (depreciation) in fair value of investments	(1,425		)
Total investment gain, net	18,389
Interest income on notes receivable from participants	2,028
Contributions
Employer	95,492
Participants	147,098
Participant rollovers	12,501
Total contributions	255,091
Total additions, net	275,508
Deductions
Benefits paid to participants	236,653
Administrative expenses	366
Total deductions	237,019
Net increase in net assets available for benefits prior to merger	38,489
Merger of Life Technologies Corporation 401(k) Savings and Investment Plan (Note 1)	926,067
Net increase in net assets available for benefits	964,556
Net Assets Available for Benefits
Beginning of year	2,281,203
End of year	$	3,245,759

The accompanying notes are an integral part of these financial statements.

3

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Notes to Financial Statements

For the Year Ended December 31, 2015

Note 1.        Plan Description

The following description of the Thermo Fisher Scientific Inc. 401(k) Retirement Plan (the “Plan”) provides only general information. Participants should refer to the Plan document for a more complete description of the Plan’s provisions.

General

The Plan is a defined contribution plan for the benefit of certain employees of Thermo Fisher Scientific Inc. (the “Plan Sponsor” or the “Company”). T. Rowe Price Trust Company is the trustee of the Plan. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 (“ERISA”).

Merger

The Company acquired Life Technologies Corporation in February 2014. Effective January 1, 2015, the Life Technologies Corporation 401(k) Savings and Investment Plan (the “Life Technologies Plan”) was merged into the Plan. The assets of the Life Technologies Plan were held by the trustee, The Bank of New York Mellon, on December 31, 2014 and were transferred into the Plan in January 2015. The aggregate value of the assets transferred was $926,067,000. Participants of the Life Technologies Plan became eligible to participate in the Plan effective January 1, 2015.

Eligibility

U.S. employees (as defined by the Plan) of the Company and its participating subsidiaries are generally eligible to participate in the Plan and receive Company matching contributions upon their date of hire (or rehire). Participants of certain unions may be eligible to participate in the Plan upon their date of hire (or rehire) but are not eligible for an allocation of Company contributions until the completion of one year of service.

Contributions

Each year participants may contribute on a combined pre-tax and after tax (Roth) basis up to 50% of their eligible compensation, not to exceed the limits of the Internal Revenue Code. Participants may also contribute amounts representing distributions from other qualified plans (“Participant Rollovers”). The Company’s non-discretionary matching contribution is equal to 100% of the first 6% of eligible compensation that a participant contributes to the Plan. Participants direct the investment of their contributions and the Company match into various investment options including investment funds and the Company’s common stock. Contributions are subject to certain limitations. Employee contributions and Company match are recorded on a bi-weekly basis or weekly for those employees on a weekly payroll.

The Plan includes an auto-enrollment provision whereby all newly eligible employees are automatically enrolled in the Plan unless they affirmatively elect not to participate in the Plan. Automatically enrolled participants have their deferral rate set at 3% of eligible compensation and their contributions invested in a designated asset allocation trust fund until changed by the participant.

4

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Notes to Financial Statements

For the Year Ended December 31, 2015

Participant Accounts

Each participant’s account is credited with the participant’s contributions, the Company matching contributions, income or losses on those balances, as well as withdrawals, loan fees and loan repayments, as applicable.

Administrative Expenses

The Company pays certain administrative expenses associated with the management of and professional services provided to the Plan which are not included in the Statement of Changes in Net Assets Available for Benefits. Expenses reported in the Statement of Changes in Net Assets Available for Benefits include both administrative fees for loan transactions, which are paid by the participants, and the fees paid from the administrative budget account as described below.

Administrative Budget Account

T. Rowe Price earns a set fee for recordkeeping services. Prior to January 2013, if the Plan’s share of investment expenses incurred by the mutual plan funds and other investments held by the Plan exceeded this fee amount, the excess was deposited by T. Rowe Price into a non-participant directed account which could be used to pay other Plan expenses, such as audit and investment consultation fees. In January 2013, the Plan’s share of investment expenses was reduced to match the fee for recordkeeping services. The remaining balance of the account is held in the T. Rowe Price Summit Cash Reserves Fund. Plan expenses of $279,000 were paid from this account during 2015. At December 31, 2015 and 2014, there was $755,000 and $1,007,000, respectively, in this account available to pay future Plan expenses.

Vesting

Participants are immediately vested in their contributions from rollovers of previous employers’ eligible qualified plans, voluntary contributions and any income or losses on those balances. Participants hired before January 1, 2014, are also immediately vested in the Company’s matching contributions plus actual income or losses on those balances. Participants hired on or after January 1, 2014, become 100% vested in the Company’s matching contributions, plus any income or losses on those balances, after two years of service.

Notes Receivable from Participants

Participants may borrow from their account balance. Loans must be for a minimum of $1,000 and have a maximum equal to $50,000 or 50% of the account balance, whichever is less. The term of the loan is generally five years except when use of the proceeds is for the purchase of a primary residence, for which the term can be up to 30 years. The loans are secured by the balance in the participant’s account and bear interest set at the prime rate as established in the Wall Street Journal, plus 1%. The prime rate and rate of interest on new Plan loans are determined as of the beginning of each calendar month. The interest rates on existing loans range from 2.15% to 9.75% at December 31, 2015 and from 3.75% to 11.50% at December 31, 2014. Principal and interest are repaid through payroll deductions for current employees.

5

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Notes to Financial Statements

For the Year Ended December 31, 2015

Benefit Payments and Plan Withdrawals

Upon termination of service, a participant (or beneficiary) may elect to receive the participant’s account balance in either a lump-sum payment or periodic installments. Withdrawals may be made under certain other circumstances in accordance with the Plan document.

Forfeitures

Forfeitures can be used to reduce future employer contributions. In 2015, $2,644,000 was paid from the Plan’s forfeiture accounts to fund company matching contributions. Changes in accumulated forfeitures also include amounts transferred into the Plan with plan mergers and investment gains and losses on the forfeiture accounts. At December 31, 2015 and 2014, there was $3,000 and $31,000, respectively, in accumulated forfeitures available to reduce future employer contributions. In connection with the merger of the Life Technologies Plan, forfeiture account assets of $1,659,000 were transferred into the Plan in January 2015.

Note 2.Summary of Significant Accounting Policies

Basis of Accounting

The financial statements of the Plan are prepared on the accrual basis of accounting.

Presentation

Certain reclassifications of prior year amounts have been made to conform to the current year presentation.

Use of Estimates

The preparation of the financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities and changes therein, and the disclosures of contingent assets and liabilities. Actual results could differ from those estimates.

Investment Valuation and Income Recognition

Investments are stated at fair value. Shares of mutual funds are valued at net asset value at year-end. The Plan’s interests in collective trusts are valued based on the net asset value per share as provided by the trustee of the fund, which is used as a practical expedient to estimate fair value, and contract value of the underlying investments of those funds or trusts. The Company’s common stock is valued based on quoted market prices. Refer to Note 4 for more information on valuation of the Plan’s investments.

Purchases and sales of investments are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date.

In the Statement of Changes in Net Assets Available for Benefits, the Plan presents the net appreciation (depreciation) in the fair value of its investments, which consists of realized gains or losses and the change in

6

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Notes to Financial Statements

For the Year Ended December 31, 2015

unrealized appreciation or depreciation on investments. The cost of investments is determined using the average-cost basis for calculating realized gains or losses.

Investment contracts held by a defined-contribution plan are required to be reported at contract value. The Plan invests in investment contracts through certain collective trusts. The Statements of Net Assets Available for Benefits presents the investments in the collective trusts at contract value relating to the investment contracts. The Statement of Changes in Net Assets Available for Benefits is also prepared on a contract value basis.

Payment of Benefits

Benefits are recorded when paid.

Notes Receivable from Participants

Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Delinquent loans are reclassified as distributions based on the terms of the Plan document. Interest income is recorded on the accrual basis. Related fees are recorded as administrative expenses when they are incurred. No allowance for credit losses has been recorded as of December 31, 2015 or 2014. If a participant ceases to make loan repayments and the plan administrator deems the participant loan to be in default, the participant loan balance is reduced and a benefit payment is recorded.

Risks and Uncertainties

The Plan invests in various investment securities, including mutual funds and common collective trusts, which are exposed to various risks, such as interest rate, credit and overall market volatility. Due to the level of risk associated with certain investment securities and the level of uncertainty related to changes in the value of investment securities, it is at least reasonably possible that changes in values of investment securities will occur in the near term and that such changes could materially affect the participants’ account balances and the amounts reported in the Statements of Net Assets Available for Benefits.

Recent Accounting Pronouncements

In July 2015, the FASB issued new guidance that removes the requirement to measure and disclose the fair value of fully benefit-responsive contracts. Contract value is the only required measure for fully benefit-responsive investment contracts. This guidance also removes the requirement to disclose individual investments that represent five percent or more of net assets available for benefits and the net appreciation or depreciation for investments by general type. The Plan adopted this guidance, including retrospective application of prior periods presented, effective January 2015. Adoption of this guidance did not have a material impact on the financial statements.

In May 2015, the FASB issued new guidance that removes the requirement to categorize within the fair value hierarchy investments for which fair value is measured using the net asset value per share (or its equivalent) practical expedient. The Plan adopted this guidance, including retrospective application of prior periods presented, effective January 2015. Adoption of this guidance, which is related to disclosure only, did not impact the Plan’s net assets available for benefits or changes in net assets available for benefits.

7

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Notes to Financial Statements

For the Year Ended December 31, 2015

Subsequent Events

The Plan has evaluated events and transactions occurring after the Statements of Net Assets Available for Benefits date through the date of issuance for recognition or disclosure in the financial statements and notes.

Note 3.Tax Status

The Plan has received a favorable determination letter dated July 6, 2012, from the Internal Revenue Service. The Plan has been amended since receiving the determination letter; however, the Plan administrator, management and the Plan’s tax counsel believe that the Plan has been designed and operated in compliance with the applicable requirements of the Internal Revenue Code.

Accounting principles generally accepted in the United States of America require plan management to evaluate tax positions taken by the plan and recognize a tax liability (or asset) if the plan has taken an uncertain position that more likely than not would not be sustained upon examination by the Internal Revenue Service. The plan administrator has analyzed the tax positions taken by the plan, and has concluded that as of December 31, 2015 and 2014, there are no uncertain positions taken or expected to be taken that would require recognition of a liability (or asset) or disclosure in the financial statements. The plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress. The plan administrator believes it is no longer subject to income tax examinations for years prior to 2012.

Note 4.         Fair Value Measurements

The fair value accounting guidance requires that assets and liabilities carried at fair value, excluding assets measured at the net asset value per share (or its equivalent) practical expedient, be classified and disclosed in one of the following three categories:

Level 1: Quoted market prices in active markets for identical assets or liabilities that the Company has the ability to access.

Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data such as quoted prices, interest rates and yield curves.

Level 3: Inputs are unobservable data points that are not corroborated by market data.

The asset’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used maximize the use of observable inputs and minimize the use of unobservable inputs.

8

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Notes to Financial Statements

For the Year Ended December 31, 2015

The following table presents information about the Plan's investments measured at fair value on a recurring basis as of December 31, 2015:

(In thousands)	Total		Level 1		Level 2		Level 3		Not subject to leveling (1)
Mutual funds	$	412,732	$	412,732	$	—	$	—	$	—
Common collective trusts	2,702,311		—		—		—		2,702,311
Common stock	81,374		81,374		—		—		—
Total investments at fair value	$	3,196,417	$	494,106	$	—	$	—	$	2,702,311

(1) Investments measured at the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.

The following table presents information about the Plan's investments measured at fair value on a recurring basis as of December 31, 2014:

(In thousands)	Total		Level 1		Level 2		Level 3		Not subject to leveling (1)
Mutual funds	$	375,384	$	375,384	$	—	$	—	$	—
Common collective trusts	1,793,745		—		—		—		1,793,745
Common stock	69,288		69,288		—		—		—
Total investments at fair value	$	2,238,417	$	444,672	$	—	$	—	$	1,793,745

(1) Investments measured at the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.

There were no transfers between levels during 2015 or 2014.

9

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Notes to Financial Statements

For the Year Ended December 31, 2015

The table below presents the fair value of Plan investments that are measured at the net asset value per share (or its equivalent) practical expedient:

	Fair Value as of
	December 31,				Unfunded		Redemption	Redemption
(In thousands)	2015		2014		Commitments		Frequency	Notice Period
Asset Category
Asset allocation funds	$	2,220,635	$	1,444,172	$	—	Daily	Daily for participant withdrawals 0-90 days for Plan withdrawals
Equity funds	264,746		188,405		—		Daily	Daily for participant withdrawals 0-90 days for Plan withdrawals
Guaranteed investment contract funds	216,930		161,168		—		Daily	Daily for participant withdrawals 12-30 months for Plan withdrawals
	$	2,702,311	$	1,793,745	$	—

Note 5.         Parties-in-Interest and Related-party Transactions

Certain Plan investments are shares of mutual funds or interests in common collective trusts managed by T. Rowe Price Retirement Services, an affiliate of T. Rowe Price Trust Company, the trustee of the Plan. Therefore, transactions in these investments, including dividends and interest earned of $4,015,000, qualify as party-in-interest transactions. Fees borne by the Plan for investment management services were included indirectly as a reduction of the return earned on each fund. Notes receivable from participants also qualify as party-in-interest transactions. Interest on notes receivable from participants was $2,028,000 in 2015.

The Plan invests in common stock of the Company and transactions in this common stock are related-party transactions. As of December 31, 2015 and 2014, the Plan held 573,660 and 553,018 shares, respectively, of Company common stock. In 2015 and 2014, the Plan purchased shares of Company common stock on the open market having a value of $12,360,000 and $9,534,000, respectively. In 2015 and 2014, the Plan sold shares of Company common stock on the open market having a value of $12,103,000 and $9,477,000, respectively. In 2015 and 2014, the Plan received cash dividends of $344,000 and $334,000, respectively on shares of Company common stock held.

10

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Notes to Financial Statements

For the Year Ended December 31, 2015

Note 6.Plan Termination

Although it has not expressed an intention to do so, the Company has the right under the Plan to discontinue its contributions at any time and to terminate the Plan, subject to the provisions of ERISA. In such event, the assets of the Plan would be distributed to participants in accordance with plan provisions.

Note 7.Reconciliation of Financial Statements to Form 5500

The following is a reconciliation of the net assets available for plan benefits per the financial statements to the Form 5500:

	December 31,		December 31,
(In thousands)	2015		2014
Net assets available for plan benefits per the financial statements	$	3,245,759	$	2,281,203
Adjustment from contract value to fair value for collective trust investments in fully benefit-responsive investment contracts	—		2,370
Net assets available for plan benefits per the Form 5500	$	3,245,759	$	2,283,573

The following is a reconciliation of the changes in net assets available for plan benefits per the financial statements to the Form 5500:

	Year Ended
	December 31,
(In thousands)	2015
Net increase in assets available for plan benefits per the financial statements	$	964,556
Adjustment from contract value to fair value for collective trust investments in fully benefit-responsive investment contracts - prior year	(2,370		)
Net increase in assets available for plan benefits per the Form 5500	$	962,186

11

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Schedule H, Line 4i – Schedule of Assets (Held at End of Year)

December 31, 2015

Supplemental Schedule

Identity of Issue/Borrower,	Description of investments including maturity date,		Current Value
Lessor or Similar Party	rate of interest, collateral, par or maturity value	Cost	(In thousands)
Cash			$	156
Mutual Funds
Dodge & Cox	Dodge & Cox Stock Fund	(2)	118,245
Dodge & Cox	Dodge & Cox International Stock Fund	(2)	92,298
Vanguard	Vanguard Mid Capitalization Index Fund, Instl.	(2)	133,029
PIMCO	PIMCO Total Return Fund	(2)	68,405
T. Rowe Price	T. Rowe Price Summit Cash Reserves Fund (1)	$755	755
Total mutual funds			412,732
Common Collective Trusts
T. Rowe Price	Retirement 2025 Active Trust D (1)	(2)	411,926
T. Rowe Price	Retirement 2030 Active Trust D (1)	(2)	393,879
T. Rowe Price	Retirement 2020 Active Trust D (1)	(2)	365,890
T. Rowe Price	Retirement 2035 Active Trust D (1)	(2)	329,541
T. Rowe Price	Retirement 2040 Active Trust D (1)	(2)	251,519
T. Rowe Price	T. Rowe Price Stable Value Fund (1)	(2)	216,930
T. Rowe Price	Retirement 2015 Active Trust D (1)	(2)	160,725
T. Rowe Price	Retirement 2045 Active Trust D (1)	(2)	128,446
State Street Global Advisors	SSGA S&P 500 Index Fund Class C	(2)	122,399
T. Rowe Price	T. Rowe Price Growth Stock Trust Class A (1)	(2)	75,797
Jennison Associates	Jennison Institutional U.S. Small-Cap Equity Fund	(2)	66,550
T. Rowe Price	Retirement 2050 Active Trust D (1)	(2)	64,142
T. Rowe Price	Retirement 2010 Active Trust D (1)	(2)	54,224
T. Rowe Price	Retirement Balanced Active Trust D (1)	(2)	20,457
T. Rowe Price	Retirement 2055 Active Trust D (1)	(2)	20,470
T. Rowe Price	Retirement 2005 Active Trust D (1)	(2)	18,168
T. Rowe Price	Retirement 2060 Active Trust D (1)	(2)	1,248
Total common collective trusts			2,702,311
Common Stock
Thermo Fisher Scientific Inc.	Common Stock (1)	(2)	81,374
Participant Loans	Participant Loans (for a term not exceeding 30 years
	at interest rates ranging from 2.15% to 9.75%) (1)	(2)	45,775
Total			$	3,242,348

(1) Assets are a party-in-interest to the Plan.

(2) Cost information is not required for participant-directed investments and, therefore, is not included.

12

Thermo Fisher Scientific Inc. 401(k) Retirement Plan

Exhibit Index

December 31, 2015 and 2014

Exhibit
Number	Description of Exhibit
23.1	Consent of PricewaterhouseCoopers LLP, an independent registered public accounting firm

13

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S‑8 (Nos. 33-54347, 33-51189 and 333-161939) of Thermo Fisher Scientific Inc. of our report dated June 16, 2016 relating to the financial statements and supplemental schedule of Thermo Fisher Scientific Inc. 401(k) Retirement Plan, which appears in this Form 11-K.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

June 16, 2016