Mativ Holdings, Inc.
US ˙ NYSE

SecurityMATV / Mativ Holdings, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership208,118 shares
Latest Disclosed Value $ 2,528,636
Sei Investments Co ownership in MATV / Mativ Holdings, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 208,118 shares of Mativ Holdings, Inc. (US:MATV) valued at $2,528,634 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 105,406 shares of Mativ Holdings, Inc.. This represents a change in shares of 97.44% during the quarter. The current value of the position is $1,577,534 USD.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (MATV) in the form of stock options.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MATV / Mativ Holdings, Inc. Historical Put/Call Ratio
Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F MATIV HOLDINGS COM 808541106 208,118 102,712 97.44 2,529 112.08
2025-11-13 2025-09-30 13F MATIV HOLDINGS COM 808541106 105,406 -10,928 -9.39 1,192 50.32 0.0013
2025-08-14 2025-06-30 13F MATIV HOLDINGS COM 808541106 116,334 -176,442 -60.27 793 -56.50 0.0009
2025-05-14 2025-03-31 13F/A-1 MATIV HOLDINGS COM 808541106 292,776 5,784 2.02 1,824 -41.72 0.0023
2025-05-13 2025-03-31 13F MATIV HOLDINGS COM 808541106 286,992 0 3,128 0.0034
2025-02-11 2024-12-31 13F MATIV HOLDINGS COM 808541106 286,992 182,341 174.24 3,128 75.93 0.0040
2024-11-12 2024-09-30 13F MATIV HOLDINGS COM 808541106 104,651 15,912 17.93 1,778 18.14 0.0023
2024-08-13 2024-06-30 13F MATIV HOLDINGS COM 808541106 88,739 17,847 25.17 1,505 13.24 0.0021
2024-05-07 2024-03-31 13F MATIV HOLDINGS COM 808541106 70,892 -3,700 -4.96 1,329 16.37 0.0019
2024-02-14 2023-12-31 13F MATIV HOLDINGS COM 808541106 74,592 -618 -0.82 1,142 6.53 0.0018
2023-11-14 2023-09-30 13F MATIV HOLDINGS COM 808541106 75,210 7,541 11.14 1,072 4.79 0.0019
2023-08-11 2023-06-30 13F MATIV HOLDINGS COM 808541106 67,669 12,179 21.95 1,023 -14.11 0.0018
2023-05-12 2023-03-31 13F MATIV HOLDINGS COM 808541106 55,490 55,490 1,191 0.0022
2023-02-10 2022-12-31 13F MATIV HOLDINGS COM 808541106 0 -41,648 -100.00 0 -100.00
2022-11-14 2022-09-30 13F MATIV HOLDINGS COM 808541106 41,648 28,592 219.00 920 180.49 0.0021
2022-08-15 2022-06-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 13,056 13,056 328 0.0007
2019-08-14 2019-06-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 0 -11,612 -100.00 0 -100.00
2019-05-15 2019-03-31 13F SCHWEITZER-MAUDUIT INTL COM 808541106 11,612 -20,128 -63.42 450 -62.99 0.0015
2019-02-13 2018-12-31 13F SCHWEITZER-MAUDUIT INTL COM 808541106 31,740 0 0.00 1,216 0.00 0.0043
2018-11-08 2018-09-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 31,740 31,634 29,843.40 1,216 24,220.00 0.0044
2018-08-03 2018-06-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 106 27 34.18 5 66.67 0.0000
2018-05-11 2018-03-31 13F SCHWEITZER-MAUDUIT INTL COM 808541106 79 -14 -15.05 3 -25.00 0.0000
2018-02-08 2017-12-31 13F SCHWEITZER-MAUDUIT INTL COM 808541106 93 -423 -81.98 4 -80.95 0.0000
2017-11-06 2017-09-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 516 -6,753 -92.90 21 -92.25 0.0001
2017-07-31 2017-06-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 7,269 3,812 110.27 271 88.19 0.0011
2017-05-05 2017-03-31 13F SCHWEITZER-MAUDUIT INTL COM 808541106 3,457 387 12.61 144 2.86 0.0006
2017-02-02 2016-12-31 13F SCHWEITZER-MAUDUIT INTL COM 808541106 3,070 0 0.00 140 17.65 0.0007
2016-11-04 2016-09-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 3,070 0 0.00 119 10.19 0.0006
2016-08-11 2016-06-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 3,070 46 1.52 108 12.50 0.0006
2016-05-10 2016-03-31 13F/A-1 SCHWEITZER-MAUDUIT INTL COM 808541106 3,024 -1,303 -30.11 96 -47.25 0.0006
2016-02-03 2015-12-31 13F SCHWEITZER-MAUDUIT INTL COM 808541106 4,327 4,289 11,286.84 182 18,100.00 0.0011
2015-11-02 2015-09-30 13F/A-1 SCHWEITZER-MAUDUIT INTL COM 808541106 38 -1,003 -96.35 1 -97.56 0.0000
2015-10-30 2015-09-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 38 3
2015-08-07 2015-06-30 13F/A-1 SCHWEITZER-MAUDUIT INTL COM 808541106 1,041 35 3.48 41 -12.77 0.0004
2015-08-04 2015-06-30 13F SCHWEITZER-MAUDUIT INTL COM 808541106 1,041 1,041 41 0.0004
2015-05-14 2015-03-31 13F/A-1 SCHWEITZER-MAUDUIT INTL COM 808541106 1,006 -87 -7.96 47 4.44 0.0004
2015-05-01 2015-03-31 13F SCANA CORP PUT 808541106 1,006 1,006 47 0.0004
2015-02-10 2014-12-31 13F SCHWEITZER-MAUDUIT INTL COM 808541106 1,093 1,093 45 0.0004
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2015-05-01 2015-03-31 13F SCANA CORP PUT 1,006 47 n/a n/a n/a
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.