0001628280-26-042864 | 11-K | XBRL Viewer

FORFEITURES	12 Months Ended
Dec. 31, 2025
EBP 002
EBP, Description of Plan [Line Items]
FORFEITURES	FORFEITURESOn December 31, 2025 and 2024, forfeited accounts available to reduce future administrative expenses totaled $2,087 and $221, respectively.

PLAN SPIN OFF	12 Months Ended
Dec. 31, 2025
EBP 002
EBP, Schedule Of Plan Spin Off [Line Items]
PLAN SPIN OFF	PLAN SPIN OFF Effective June 1, 2024, the Company approved the spin off of the Terphane, LLC participants and their related accounts from the Plan to the newly established Terphane 401(k) Retirement Savings Plan. As a result, net assets of $7,832,029 were transferred out of the Plan.

RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500 - Reconciliation of Net Assets Available for Benefit (Details) - EBP 002 - USD ($)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
EBP, Reconciliation of Financial Statement to Form 5500 [Line Items]
Net assets available for benefits per Statements of Net Assets Available for Benefits	$ 158,958,581	$ 137,444,523	$ 136,606,618
Adjustment for deemed distributed loans	(139,855)	(137,412)
Net assets available for benefits per the Form 5500	$ 158,818,726	$ 137,307,111

- Definition

Amount of asset less liability available to pay benefit of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, aggregation of participants' individual account balances.

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+ Details

INCOME TAX STATUS	12 Months Ended
Dec. 31, 2025
EBP 002
EBP, Tax Status [Line Items]
INCOME TAX STATUS	INCOME TAX STATUS The Plan received its latest determination letter on February 28, 2018, in which the Internal Revenue Service stated that the Plan, as then designed, was in compliance with the applicable requirements of the Internal Revenue Code (“IRC”). The Plan has been amended since receiving the determination letter. However, the Plan administrator and the Plan’s tax counsel believe that the Plan is designed and is currently being operated in compliance with the applicable requirements of the IRC and therefore, believe that the Plan is qualified, and the related trust is tax-exempt. U.S. GAAP requires Plan management to evaluate tax positions taken by the Plan and recognize a tax liability (or asset) if the Plan has taken an uncertain tax position that more likely than not would not be sustained upon examination by the taxing authorities. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits in progress for any periods.

RELATED PARTY AND PARTY IN INTEREST TRANSACTIONS (Details) - EBP 002 - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
EBP, Related Party And Party-in-Interest Transactions [Roll Forward]
Balance, January 1	$ 133,919,803
Net appreciation (depreciation) in fair value	17,673,583	$ 13,689,410
Balance, December 31	155,157,331	133,919,803
Tredegar Corporation common stock
EBP, Related Party And Party-in-Interest Transactions [Roll Forward]
Balance, January 1	4,915,044	3,800,985
Distributions and sales	(530,041)	(358,514)
Net appreciation (depreciation) in fair value	(259,231)	1,472,573
Balance, December 31	$ 4,125,772	$ 4,915,044

- Definition

Fair value of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

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+ Details

FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2025

EBP 002

EBP, Investment, Fair Value and NAV [Line Items]

Summary of Financial Assets Measured at Fair Value

The following tables summarize financial assets measured at fair value on a recurring basis, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value, as of December 31, 2025 and 2024, respectively:


Assets Measured at Fair Value on a Recurring Basis at December 31, 2025
	Level 1		Total
Money market fund	$	1,667,814	$	1,667,814
Mutual funds	142,541,848		142,541,848
Common stock	4,125,772		4,125,772
Self-directed brokerage account	4,901,114		4,901,114
Total assets in the fair value hierarchy	$	153,236,548	153,236,548
Investments measured at NAV			1,920,783
Total investments at fair value			$	155,157,331


Assets Measured at Fair Value on a Recurring Basis at December 31, 2024
	Level 1		Total
Money market fund	$	1,916,826	$	1,916,826
Mutual funds	120,806,330		120,806,330
Common stock	4,915,044		4,915,044
Self-directed brokerage account	4,105,258		4,105,258
Total assets in the fair value hierarchy	$	131,743,458	131,743,458
Investments measured at NAV			2,176,345
Total investments at fair value			$	133,919,803

The following tables summarize investments measured at fair value based on NAV per share at December 31, 2025 and 2024, respectively.

December 31, 2025

Fair Value

Unfunded Commitments

Redemption Frequency

Redemption Notice Period

Common

Collective Trust - Galliard

Retirement Income Fund 45(1)

1,920,783

N/A

Daily or monthly

None or 5 days

December 31, 2024

Fair Value

Unfunded Commitments

Redemption Frequency

Redemption Notice Period

Common

Collective Trust - Galliard

Retirement Income Fund 45(1)

2,176,345

N/A

Daily or monthly

None or 5 days

(1) Galliard Retirement Income Fund is an open-end fund incorporated in the United States that will be invested in the Galliard Managed Income Fund. This fund seeks to provide safety of principal, adequate liquidity and competitive yield with low return volatility.

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Tabular disclosure of fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, fair value measured at net asset value per share as practical expedient (NAV).

+ References

+ Details

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) - EBP 002	12 Months Ended
	Dec. 31, 2025
EBP, Accounting Policy [Line Items]
Basis of Accounting	Basis of Accounting The financial statements of the Plan are prepared on the accrual basis of accounting.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States of America ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and changes therein, and disclosure of contingent assets and liabilities. Actual results may differ from those estimates.
Investment Valuation and Income Recognition	Investment Valuation and Income Recognition Investments are reported at fair value. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 4 for discussion of fair value measurements. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date. Net appreciation (depreciation) includes the Plan's realized and unrealized gains and losses on investments bought and sold as well as held during the year.
Notes Receivable from Participants	Notes Receivable from Participants Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Interest income is recorded on the accrual basis. No allowance for credit losses has been recorded as of December 31, 2025 or 2024. 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.
Contributions	Contributions Contributions to the Plan from participants and, when applicable, from the Company are recorded in the period that payroll deductions are made from Plan participants.
Payment of Benefits	Payment of Benefits Benefits are recorded when paid.
Administrative Expenses	Administrative Expenses The Plan is responsible for all trustee and investment management fees. Participants are charged a pro-rated per-participant fee of $63.00. To cover additional expenses, participants are also charged 0.03% of annual plan-related expenses. Tredegar also pays for other administrative expenses up to an annual limit of $75,000. Any expenses in excess of this limit are paid by the Plan. In 2025 and 2024, administrative expenses were reduced by trustee credits, participant paid fees, and forfeited accounts totaling $63,911 and $103,726 respectively.
Subsequent Events	Subsequent Events The Plan has evaluated all events through June 12, 2026, the date the financial statements were issued, and has determined that there were no subsequent events that require disclosure pursuant to the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”).

Statements of Net Assets Available for Benefits - EBP 002 - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Investments, at fair value:
Total investments	$ 155,157,331	$ 133,919,803
Receivables:
Notes receivable from participants	3,801,250	3,524,720
Total receivables	3,801,250	3,524,720
Net increase after transfer out	158,958,581	137,444,523
Money market fund
Investments, at fair value:
Total investments	1,667,814	1,916,826
Mutual funds
Investments, at fair value:
Total investments	142,541,848	120,806,330
Tredegar Corporation common stock
Investments, at fair value:
Total investments	4,125,772	4,915,044
Self-directed brokerage account
Investments, at fair value:
Total investments	4,901,114	4,105,258
Common collective trust
Investments, at fair value:
Total investments	$ 1,920,783	$ 2,176,345

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

12 Months Ended

Dec. 31, 2025

EBP 002

EBP, Schedule of Asset Held for Investment [Line Items]

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

TREDEGAR CORPORATION RETIREMENT SAVINGS PLAN

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

December 31, 2025

EIN: 54-1497771 PN: 002

(b)

(c)

(d)

(e)

(a)

Identity of issuer, borrower, lessor or similar party

Description of investment including maturity date, rate of interest, collateral, par or maturity value

Cost

Current Value

Fidelity Government Cash Reserve

Money Market Fund

1,667,814

American Funds Europacific GR R6

Mutual Funds

803,063

BlackRock Advantage Small Cap Core

Mutual Funds

786,911

Carillon Eagle Mid Cap Growth I

Mutual Funds

2,021,079

Dodge & Cox Income Fund

Mutual Funds

1,970,496

Fidelity 500 Index Fund

Mutual Funds

22,252,817

Fidelity Emerging Markets Index Fund

Mutual Funds

584,155

Fidelity Extended Market Index Fund

Mutual Funds

3,329,104

Fidelity Freedom Index Income Fund

Mutual Funds

1,403,883

Fidelity Freedom 2010 Fund - Institutional Premium Class

Mutual Funds

14,537

Fidelity Freedom 2015 Fund - Institutional Premium Class

Mutual Funds

118,528

Fidelity Freedom 2020 Fund - Institutional Premium Class

Mutual Funds

7,014,414

Fidelity Freedom 2025 Fund - Institutional Premium Class

Mutual Funds

16,205,009

Fidelity Freedom 2030 Fund - Institutional Premium Class

Mutual Funds

20,505,797

Fidelity Freedom 2035 Fund - Institutional Premium Class

Mutual Funds

16,741,204

Fidelity Freedom 2040 Fund - Institutional Premium Class

Mutual Funds

14,106,008

Fidelity Freedom 2045 Fund - Institutional Premium Class

Mutual Funds

11,626,663

Fidelity Freedom 2050 Fund - Institutional Premium Class

Mutual Funds

7,688,421

Fidelity Freedom 2055 Fund - Institutional Premium Class

Mutual Funds

5,769,708

Fidelity Freedom 2060 Fund - Institutional Premium Class

Mutual Funds

3,594,742

Fidelity Freedom 2065 Fund - Institutional Premium Class

Mutual Funds

1,338,818

Fidelity Freedom 2070 Fund - Institutional Premium Class

Mutual Funds

140,669

Fidelity Inflation-Protected Bond Index Fund

Mutual Funds

275,144

Fidelity Total International Index Fund

Mutual Funds

2,123,486

Fidelity U.S. Bond Index Fund

Mutual Funds

1,678,659

Galliard Retirement Income Fund 45

Collective/Common Trust

1,920,783

Vanguard Real Estate Index Fund

Mutual Funds

272,981

Vanguard Total Intl Bond Index Admiral

Mutual Funds

175,552

Tredegar Company Stock

Employer Stock

4,125,772

Various

Self Directed Brokerage Account

4,901,114

Participant loans

495 loans, maturing between January 2026 and June 2039 at 4.25% - 9.50% interest

3,661,395

158,818,726

* Party-in-interest

** Cost omitted for participant directed investments

FAIR VALUE MEASUREMENTS (Details) - EBP 002 - USD ($)	12 Months Ended
FAIR VALUE MEASUREMENTS (Details) - EBP 002 - USD ($)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	$ 155,157,331	$ 133,919,803
Redemption, notice period	5 days	5 days
Fair Value, Inputs, Level 1, Level 2, and Level 3
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	$ 153,236,548	$ 131,743,458
Level 1
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	153,236,548	131,743,458
Money market fund
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	1,667,814	1,916,826
Money market fund \| Fair Value, Inputs, Level 1, Level 2, and Level 3
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	1,667,814	1,916,826
Money market fund \| Level 1
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	1,667,814	1,916,826
Mutual funds
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	142,541,848	120,806,330
Mutual funds \| Fair Value, Inputs, Level 1, Level 2, and Level 3
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	142,541,848	120,806,330
Mutual funds \| Level 1
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	142,541,848	120,806,330
Tredegar Corporation common stock
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	4,125,772	4,915,044	$ 3,800,985
Tredegar Corporation common stock \| Fair Value, Inputs, Level 1, Level 2, and Level 3
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	4,125,772	4,915,044
Tredegar Corporation common stock \| Level 1
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	4,125,772	4,915,044
Self-directed brokerage account
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	4,901,114	4,105,258
Self-directed brokerage account \| Fair Value, Inputs, Level 1, Level 2, and Level 3
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	4,901,114	4,105,258
Self-directed brokerage account \| Level 1
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	4,901,114	4,105,258
Common collective trust
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	1,920,783	2,176,345
Common collective trust \| Investments measured at NAV
EBP, Investment, Fair Value and NAV [Line Items]
Total investments	$ 1,920,783	$ 2,176,345

FAIR VALUE MEASUREMENTS

12 Months Ended

Dec. 31, 2025

EBP 002

EBP, Investment, Fair Value and NAV [Line Items]

FAIR VALUE MEASUREMENTS

FASB ASC 820, Fair Value Measurement, provides the framework for measuring fair value. That framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy under FASB ASC 820 are described as follows:

Level 1 Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Plan has the ability to access.

Level 2 Inputs to the valuation methodology include:

•quoted prices for similar assets or liabilities in active markets;

•quoted prices for identical or similar assets or liabilities in inactive markets;

•inputs other than quoted prices that are observable for the asset or liability;

•inputs that are derived principally from or corroborated by observable market data by correlation or other means.

If the asset or liability has a specified (contractual) term, the Level 2 input must be observable for substantially the full term of the asset or liability.

Level 3 Inputs to the valuation methodology are unobservable and significant to the fair value measurement.

The asset or liability'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 need to maximize the use of observable inputs and minimize the use of unobservable inputs.

Following is a description of the valuation methodologies used for assets measured at fair value. There have been no changes in the methodologies used at December 31, 2025 and 2024.

Money market fund: Valued at market price, which is equivalent to $1 per unit.

Mutual funds: Valued at the daily closing price as reported by the fund. Mutual funds held by the Plan are open-end mutual funds that are registered with the Securities and Exchange Commission (“SEC”). These funds are required to publish their daily net asset value (“NAV”) and to transact at that price. The mutual funds held by the Plan are deemed to be actively traded.

Common stock: Valued at closing price reported on the active market on which the individual securities are traded.

Self-directed brokerage account: Valued at the closing price reported on the active market on which the individual securities are traded.

Common/collective trust: A fund that is composed primarily of fully benefit-responsive investment contracts that is valued at the NAV of units of a bank collective trust. The NAV, as provided by the trustee, is used as a practical expedient to estimate fair value. The NAV is based on the fair value of the underlying investments held by the funds less its liabilities. This practical expedient is not used when it is determined to be probable that the fund will sell the investment for an amount different than the reported NAV.

The preceding methods described may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, although the Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.


Assets Measured at Fair Value on a Recurring Basis at December 31, 2025
	Level 1		Total
Money market fund	$	1,667,814	$	1,667,814
Mutual funds	142,541,848		142,541,848
Common stock	4,125,772		4,125,772
Self-directed brokerage account	4,901,114		4,901,114
Total assets in the fair value hierarchy	$	153,236,548	153,236,548
Investments measured at NAV			1,920,783
Total investments at fair value			$	155,157,331


Assets Measured at Fair Value on a Recurring Basis at December 31, 2024
	Level 1		Total
Money market fund	$	1,916,826	$	1,916,826
Mutual funds	120,806,330		120,806,330
Common stock	4,915,044		4,915,044
Self-directed brokerage account	4,105,258		4,105,258
Total assets in the fair value hierarchy	$	131,743,458	131,743,458
Investments measured at NAV			2,176,345
Total investments at fair value			$	133,919,803

The Plan did not hold any Level 2 or Level 3 investments as of December 31, 2025 and 2024.

Fair Value of Investments in Entities that Use NAV

The following tables summarize investments measured at fair value based on NAV per share at December 31, 2025 and 2024, respectively.

December 31, 2025

Fair Value

Unfunded Commitments

Redemption Frequency

Redemption Notice Period

Common

Collective Trust - Galliard

Retirement Income Fund 45(1)

1,920,783

N/A

Daily or monthly

None or 5 days

December 31, 2024

Fair Value

Unfunded Commitments

Redemption Frequency

Redemption Notice Period

Common

Collective Trust - Galliard

Retirement Income Fund 45(1)

2,176,345

N/A

Daily or monthly

None or 5 days

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

The entire disclosure for fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, fair value measured at net asset value per share as practical expedient (NAV).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 45
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477509/962-325-45-5

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(2)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-04(3)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-02(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 16: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 23
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-23

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 45
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477509/962-325-45-6

+ Details

Statements of Changes in Net Assets Available for Benefits - EBP 002 - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Investment income:
Interest and dividends	$ 4,228,675	$ 3,305,884
Net appreciation in fair value of investments	17,673,583	13,689,410
Total investment gain	21,902,258	16,995,294
Interest income on notes receivable from participants	309,268	247,826
Contributions:
Participants	7,400,860	6,501,416
Employer	4,291,881	3,790,600
Rollovers	1,020,414	633,620
Total contributions	12,713,155	10,925,636
Total additions	34,924,681	28,168,756
Deductions from net assets attributed to:
Administrative expenses	217,346	240,200
Benefits paid to participating employees	13,193,277	19,258,622
Total deductions	13,410,623	19,498,822
Net increase before transfers	21,514,058	8,669,934
Transfer out to another plan (see Note 11)	0	(7,832,029)
Net increase after transfer out	21,514,058	837,905
Beginning of year	137,444,523	136,606,618
End of year	$ 158,958,581	$ 137,444,523

Schedule H, Line 4i – Schedule of Assets (Held At End of Year) (Details) - EBP 002	12 Months Ended
	Dec. 31, 2025 USD ($) loan
EBP, Schedule of Asset Held for Investment [Line Items]
Entity tax identification number	54-1497771
Plan number	002
Number of participant loans \| loan	495
Participant loan, cost	$ 0
Participant loans	3,661,395
Total	$ 158,818,726
Minimum
EBP, Schedule of Asset Held for Investment [Line Items]
Participant loan, interest rate	4.25%
Maximum
EBP, Schedule of Asset Held for Investment [Line Items]
Participant loan, interest rate	9.50%
Investment, Identifier [Axis]: American Funds Europacific GR R6 \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	$ 803,063
Investment, Identifier [Axis]: BlackRock Advantage Small Cap Core \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	786,911
Investment, Identifier [Axis]: Carillon Eagle Mid Cap Growth I \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	2,021,079
Investment, Identifier [Axis]: Dodge & Cox Income Fund \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	1,970,496
Investment, Identifier [Axis]: Fidelity 500 Index Fund \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	22,252,817
Investment, Identifier [Axis]: Fidelity Emerging Markets Index Fund \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	584,155
Investment, Identifier [Axis]: Fidelity Extended Market Index Fund \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	3,329,104
Investment, Identifier [Axis]: Fidelity Freedom 2010 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	14,537
Investment, Identifier [Axis]: Fidelity Freedom 2015 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	118,528
Investment, Identifier [Axis]: Fidelity Freedom 2020 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	7,014,414
Investment, Identifier [Axis]: Fidelity Freedom 2025 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	16,205,009
Investment, Identifier [Axis]: Fidelity Freedom 2030 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	20,505,797
Investment, Identifier [Axis]: Fidelity Freedom 2035 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	16,741,204
Investment, Identifier [Axis]: Fidelity Freedom 2040 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	14,106,008
Investment, Identifier [Axis]: Fidelity Freedom 2045 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	11,626,663
Investment, Identifier [Axis]: Fidelity Freedom 2050 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	7,688,421
Investment, Identifier [Axis]: Fidelity Freedom 2055 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	5,769,708
Investment, Identifier [Axis]: Fidelity Freedom 2060 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	3,594,742
Investment, Identifier [Axis]: Fidelity Freedom 2065 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	1,338,818
Investment, Identifier [Axis]: Fidelity Freedom 2070 Fund - Institutional Premium Class \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	140,669
Investment, Identifier [Axis]: Fidelity Freedom Index Income Fund \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	1,403,883
Investment, Identifier [Axis]: Fidelity Government Cash Reserve \| Money Market Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	1,667,814
Investment, Identifier [Axis]: Fidelity Inflation-Protected Bond Index Fund \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	275,144
Investment, Identifier [Axis]: Fidelity Total International Index Fund \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	2,123,486
Investment, Identifier [Axis]: Fidelity U.S. Bond Index Fund \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	1,678,659
Investment, Identifier [Axis]: Galliard Retirement Income Fund 45 \| Collective/Common Trust
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	1,920,783
Investment, Identifier [Axis]: Tredegar Company Stock \| Employer Stock
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	4,125,772
Investment, Identifier [Axis]: Vanguard Real Estate Index Fund \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	272,981
Investment, Identifier [Axis]: Vanguard Total Intl Bond Index Admiral \| Mutual Funds
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	175,552
Investment, Identifier [Axis]: Various \| Self Directed Brokerage Account
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	$ 4,901,114

RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500 - Reconciliation of Net Income (Details) - EBP 002 - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
EBP, Reconciliation of Financial Statement to Form 5500 [Line Items]
Net increase per Statements of Changes in Net Assets Available for Benefits	$ 21,514,058	$ 8,669,934
Adjustment for deemed distributed loans	(2,443)	(20,963)
Net income per Form 5500	$ 21,511,615	$ 8,648,971

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Dec. 31, 2025
EBP 002
EBP, Accounting Policy [Line Items]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Accounting The financial statements of the Plan are prepared on the accrual basis of accounting. Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States of America ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and changes therein, and disclosure of contingent assets and liabilities. Actual results may differ from those estimates. Investment Valuation and Income Recognition Investments are reported at fair value. Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 4 for discussion of fair value measurements. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date. Net appreciation (depreciation) includes the Plan's realized and unrealized gains and losses on investments bought and sold as well as held during the year. Notes Receivable from Participants Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. Interest income is recorded on the accrual basis. No allowance for credit losses has been recorded as of December 31, 2025 or 2024. 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. Contributions Contributions to the Plan from participants and, when applicable, from the Company are recorded in the period that payroll deductions are made from Plan participants. Payment of Benefits Benefits are recorded when paid. Administrative Expenses The Plan is responsible for all trustee and investment management fees. Participants are charged a pro-rated per-participant fee of $63.00. To cover additional expenses, participants are also charged 0.03% of annual plan-related expenses. Tredegar also pays for other administrative expenses up to an annual limit of $75,000. Any expenses in excess of this limit are paid by the Plan. In 2025 and 2024, administrative expenses were reduced by trustee credits, participant paid fees, and forfeited accounts totaling $63,911 and $103,726 respectively. Subsequent Events The Plan has evaluated all events through June 12, 2026, the date the financial statements were issued, and has determined that there were no subsequent events that require disclosure pursuant to the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”).

CONTRIBUTIONS AND INVESTMENT OPTIONS (Details) - EBP 002	12 Months Ended
	Dec. 31, 2025 USD ($) investment year
EBP, Description of Plan [Line Items]
Minimum annual compensation to total compensation percentage	1.00%
Maximum annual compensation to total compensation percentage	75.00%
Participant contribution match per dollar \| $	$ 1.00
Participant compensation matched	5.00%
Percentage of contributions allocated to applicable target date fund if no selection is made	100.00%
Estimated retirement age \| year	65
Minimum
EBP, Description of Plan [Line Items]
Deferral rate	3.00%
Maximum
EBP, Description of Plan [Line Items]
Deferral rate	5.00%
Mutual funds
EBP, Description of Plan [Line Items]
Number of investment options	26
Common collective trust
EBP, Description of Plan [Line Items]
Number of investment options	1
Money market fund
EBP, Description of Plan [Line Items]
Number of investment options	1

Cover	12 Months Ended
Cover	Dec. 31, 2025
Document Information [Line Items]
Document Type	11-K
Entity Registrant Name	Tredegar Corporation
Entity Central Index Key	0000850429
Amendment Flag	false
EBP 002
Document Information [Line Items]
Document Type	11-K
Entity Registrant Name	Tredegar Corporation
Entity Central Index Key	0000850429
Amendment Flag	false

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - EBP 002 - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
EBP, Accounting Policy [Line Items]
Pro-rated per-participant fee	$ 63.00
Percentage of annual plan-related expenses charged per-participant	0.03%
Annual limit of other administrative expenses	$ 75,000
Total administrative expenses	$ 63,911	$ 103,726

RISKS AND UNCERTAINTIES	12 Months Ended
RISKS AND UNCERTAINTIES	Dec. 31, 2025
EBP 002
EBP, Risk and Uncertainty [Line Items]
RISKS AND UNCERTAINTIES	RISKS AND UNCERTAINTIES The Plan invests in various investment securities. Investment securities are exposed to various risks such as interest rate, market, and credit risks. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect participants’ account balances and the amounts reported in the statements of net assets available for benefits.

FORFEITURES (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
EBP 002
EBP, Description of Plan [Line Items]
Forfeited accounts available	$ 2,087	$ 221

PLAN TERMINATION	12 Months Ended
PLAN TERMINATION	Dec. 31, 2025
EBP 002
EBP, Description of Plan [Line Items]
PLAN TERMINATION	PLAN TERMINATION Although it has not expressed any intent to do so, Tredegar 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 the event of Plan termination, participants would become 100% vested in their employer contributions.

DESCRIPTION OF PLAN	12 Months Ended
DESCRIPTION OF PLAN	Dec. 31, 2025
EBP 002
EBP, Description of Plan [Line Items]
DESCRIPTION OF PLAN	DESCRIPTION OF PLAN General Tredegar Corporation and subsidiaries (collectively “Tredegar” or “the Company” or “Plan Sponsor”), which is primarily engaged in the manufacturing of aluminum extrusions, polyethylene films and polyester films, is a Virginia corporation. The Tredegar Corporation Retirement Savings Plan (“Plan”) was adopted by the Board of Directors of Tredegar (“the Board”) on June 14, 1989 and the Plan was effective as of July 1, 1989. The Plan is subject to Titles I, II and III and is exempt from Title IV of the Employee Retirement Income Security Act of 1974 (“ERISA”). Title IV of ERISA provides for federally sponsored insurance for plans that terminate with unfunded benefits. No such insurance is provided to participants in this Plan; however, because the benefits that participants are entitled to receive are always equal to the value of their account balances, the Plan is always fully funded. The value of a participant's account may change from time to time. Each participant assumes the risk of fluctuations in the value of his or her account. The Plan is a defined contribution plan. Information regarding plan benefits and vesting is provided in the Plan and related documents, which are available at Tredegar’s main office at 1100 Boulders Parkway, Richmond, Virginia. Effective January 1, 2019, the Plan was amended to make the Plan a safe harbor 401(k) plan and eliminate after-tax contributions. The Plan is administered by the Company. Plan assets are held by Fidelity Management Trust Company (“Fidelity”), the trustee of the Plan.

CONTRIBUTIONS AND INVESTMENT OPTIONS	12 Months Ended
CONTRIBUTIONS AND INVESTMENT OPTIONS	Dec. 31, 2025
EBP 002
EBP, Description of Plan [Line Items]
CONTRIBUTIONS AND INVESTMENT OPTIONS	CONTRIBUTIONS AND INVESTMENT OPTIONS A participant may contribute a percentage of his or her eligible base pay (as defined) ranging from a minimum of 1% to a maximum of 75%. The 2025 and 2024 Tredegar matching contribution was $1.00 for every $1.00 a participant contributed up to 5% each payroll period. With the exception of participants covered under certain collective bargaining agreements, employees are automatically enrolled in the Plan with a pre-tax contribution equal to 3% of base pay invested in the age appropriate target date fund and automatically increased in the succeeding plan year until the contribution level is equal to 5% of base pay. Employees have the choice to waive automatic enrollment as well as automatic increase and contribute more or less in their choice of investment funds. Participants direct the investment of their contributions into various investment options offered by the Plan. As of December 31, 2025, the Plan offered twenty-six (26) mutual funds, one (1) common collective trust, one (1) money market fund and a self-directed brokerage account as investment options to participants. Investments also include the Tredegar Company Stock, in which new investments are prohibited. All employer matching contributions are allocated according to the participant's investment direction. If no selection is made, 100% is allocated to the applicable target date fund; the Plan's default funds, based on the participant's age and an estimated retirement age of 65. The Plan Sponsor may also make an additional discretionary match, to be determined by the Board. There were no such discretionary contributions for the years ended December 31, 2025 and 2024.

PLAN SPIN OFF (Details) - USD ($)	12 Months Ended
PLAN SPIN OFF (Details) - USD ($)	Dec. 31, 2025	Dec. 31, 2024
EBP 002
EBP, Schedule Of Plan Spin Off [Line Items]
Transfer out to another plan (see Note 11)	$ 0	$ 7,832,029