Clearwater Paper Corporation
US ˙ NYSE ˙ US18538R1032

SecurityCLW / Clearwater Paper Corporation
InstitutionSimplex Trading, Llc
Latest Disclosed Ownership22,052 shares
Latest Disclosed Value $ 317,107
Simplex Trading, Llc ownership in CLW / Clearwater Paper Corporation

On May 14, 2026 - Simplex Trading, Llc filed a 13F-HR form disclosing ownership of 22,052 shares of Clearwater Paper Corporation (US:CLW) valued at $317,108 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 6,806 shares of Clearwater Paper Corporation. This represents a change in shares of 224.01% during the quarter. The current value of the position is $366,063 USD.

Simplex Trading, Llc has a history of taking positions in derivatives of the underlying security (CLW) in the form of stock options. The firm currently holds call options representing 9,700 of underlying shares valued at $139,486 USD and put options representing 4,300 of underlying shares valued at $61,834 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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.

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Institutional Put/Call Ratios
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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.

CLW / Clearwater Paper Corporation 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)
2026-05-14 2026-03-31 13F CLEARWATER PAPER COM 18538R103 22,052 15,246 224.01 317 168.64 0.0001
2026-02-11 2025-12-31 13F CLEARWATER PAPER COM 18538R103 6,806 -963 -12.40 118 0.0001
2025-11-12 2025-09-30 13F CLEARWATER PAPER COM 18538R103 7,769 7,359 1,794.88 0 0.0001
2025-08-05 2025-06-30 13F CLEARWATER PAPER COM 18538R103 410 -21,845 -98.16 0 0.0000
2025-05-12 2025-03-31 13F CLEARWATER PAPER COM 18538R103 22,255 -15,281 -40.71 1 -100.00 0.0004
2025-02-11 2024-12-31 13F CLEARWATER PAPER COM 18538R103 37,536 34,695 1,221.22 1 0.0006
2024-11-08 2024-09-30 13F CLEARWATER PAPER COM 18538R103 2,841 2,782 4,715.25 0 0.0000
2024-07-25 2024-06-30 13F CLEARWATER PAPER COM 18538R103 59 59 0 0.0000
2023-08-04 2023-06-30 13F CLEARWATER PAPER COM 18538R103 0 -1,391 -100.00 0 0.0000
2023-04-27 2023-03-31 13F CLEARWATER PAPER COM 18538R103 1,391 1,391 0 0.0000
2023-02-02 2022-12-31 13F CLEARWATER PAPER COM 18538R103 0 -4,874 -100.00 0 -100.00
2022-11-04 2022-09-30 13F CLEARWATER PAPER COM 18538R103 4,874 2,156 79.32 183 101.10 0.0002
2022-08-03 2022-06-30 13F CLEARWATER PAPER COM 18538R103 2,718 900 49.50 91 82.00 0.0001
2022-05-02 2022-03-31 13F CLEARWATER PAPER COM 18538R103 1,818 -6,395 -77.86 50 -83.39 0.0000
2022-02-23 2021-12-31 13F/A-1 CLEARWATER PAPER COM 18538R103 8,213 4,980 154.04 301 223.66 0.0003
2022-02-04 2021-12-31 13F CLEARWATER PAPER COM 18538R103 3,233 0 93 0.0000
2021-10-28 2021-09-30 13F CLEARWATER PAPER COM 18538R103 3,233 0 0.00 93 0.00 0.0001
2021-08-12 2021-06-30 13F CLEARWATER PAPER COM 18538R103 3,233 -7,754 -70.57 93 -77.48 0.0001
2021-04-26 2021-03-31 13F CLEARWATER PAPER COM 18538R103 10,987 10,987 239.84 413 344.09 0.0007
2021-02-02 2020-12-31 13F CLEARWATER PAPER COM 18538R103 0 -17,383 -100.00 0 -100.00
2020-10-14 2020-09-30 13F CLEARWATER PAPER COM 18538R103 17,383 -2,844 -14.06 659 -9.73 0.0009
2020-07-13 2020-06-30 13F CLEARWATER PAPER COM 18538R103 20,227 12,422 159.15 730 329.41 0.0012
2020-04-29 2020-03-31 13F CLEARWATER PAPER COM 18538R103 7,805 -6,594 -45.79 170 -44.63 0.0003
2020-02-05 2019-12-31 13F CLEARWATER PAPER COM 18538R103 14,399 -3,665 -20.29 307 -19.42 0.0007
2019-10-15 2019-09-30 13F CLEARWATER PAPER COM 18538R103 18,064 18,064 381 0.0011
2019-01-16 2018-12-31 13F CLEARWATER PAPER COM 18538R103 0 -1,857 -100.00 0 -100.00
2018-10-23 2018-09-30 13F CLEARWATER PAPER COM 18538R103 1,857 -5,164 -73.55 55 -66.05 0.0002
2018-07-30 2018-06-30 13F CLEARWATER PAPER COM 18538R103 7,021 -11,965 -63.02 162 -78.17 0.0006
2018-04-26 2018-03-31 13F CLEARWATER PAPER COM 18538R103 18,986 18,955 61,145.16 742 74,100.00 0.0326
2018-01-10 2017-12-31 13F CLEARWATER PAPER COM 18538R103 31 31 1 0.0000
2015-07-08 2015-06-30 13F CLEARWATER PAPER COM 18538R103 0 -630 -100.00 0 -100.00
2015-04-21 2015-03-31 13F CLEARWATER PAPER COM 18538R103 630 630 41 0.0048
Disclosed Call 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
(%)
2026-05-14 2026-03-31 13F CLEARWATER PAPER CALL Call 9,700 0.00 139 -17.26 n/a n/a n/a
2026-02-11 2025-12-31 13F CLEARWATER PAPER CALL Call 9,700 94.00 169 n/a n/a n/a
2025-11-12 2025-09-30 13F CLEARWATER PAPER CALL Call 5,000 51.52 0 n/a n/a n/a
2025-08-05 2025-06-30 13F CLEARWATER PAPER CALL Call 3,300 -96.28 0 -100.00 n/a n/a n/a
2025-05-12 2025-03-31 13F CLEARWATER PAPER CALL Call 88,700 124.56 2 100.00 n/a n/a n/a
2025-02-11 2024-12-31 13F CLEARWATER PAPER CALL Call 39,500 797.73 1 n/a n/a n/a
2024-11-08 2024-09-30 13F CLEARWATER PAPER CALL Call 4,400 340.00 0 n/a n/a n/a
2024-07-25 2024-06-30 13F CLEARWATER PAPER CALL Call 1,000 -69.70 0 n/a n/a n/a
2024-04-25 2024-03-31 13F CLEARWATER PAPER CALL Call 3,300 -64.52 0 n/a n/a n/a
2024-02-02 2023-12-31 13F CLEARWATER PAPER CALL Call 9,300 389.47 0 n/a n/a n/a
2023-11-01 2023-09-30 13F CLEARWATER PAPER CALL Call 1,900 -24.00 0 n/a n/a n/a
2023-08-04 2023-06-30 13F CLEARWATER PAPER CALL Call 2,500 0 n/a n/a n/a
2023-04-27 2023-03-31 13F CLEARWATER PAPER CALL Call 0 -100.00 0 n/a n/a n/a
2023-02-02 2022-12-31 13F CLEARWATER PAPER CALL Call 3,200 700.00 0 -100.00 n/a n/a n/a
2022-11-04 2022-09-30 13F CLEARWATER PAPER CALL Call 400 -66.67 15 -62.50 n/a n/a n/a
2022-08-03 2022-06-30 13F CLEARWATER PAPER CALL Call 1,200 300.00 40 400.00 n/a n/a n/a
2022-05-02 2022-03-31 13F CLEARWATER PAPER CALL Call 300 -96.81 8 -97.67 n/a n/a n/a
2022-02-23 2021-12-31 13F/A CLEARWATER PAPER CALL Call 9,400 571.43 344 760.00 n/a n/a n/a
2022-02-04 2021-12-31 13F CLEARWATER PAPER CALL Call 1,400 40 n/a n/a n/a
2021-10-28 2021-09-30 13F CLEARWATER PAPER CALL Call 1,400 0.00 40 0.00 n/a n/a n/a
2021-08-12 2021-06-30 13F CLEARWATER PAPER CALL Call 1,400 17,400.00 40 33.33 n/a n/a n/a
2021-04-26 2021-03-31 13F CLEARWATER PAPER CALL Call 8 -52.94 30 -53.12 n/a n/a n/a
2021-02-02 2020-12-31 13F CLEARWATER PAPER CALL Call 17 -90.23 64 -90.30 n/a n/a n/a
2020-10-14 2020-09-30 13F CLEARWATER PAPER CALL Call 174 -1.69 660 3.29 n/a n/a n/a
2020-07-13 2020-06-30 13F CLEARWATER PAPER CALL Call 177 0.00 639 65.54 n/a n/a n/a
2020-04-29 2020-03-31 13F CLEARWATER PAPER CALL Call 177 80.61 386 84.69 n/a n/a n/a
2020-02-05 2019-12-31 13F CLEARWATER PAPER CALL Call 98 600.00 209 620.69 n/a n/a n/a
2019-10-15 2019-09-30 13F CLEARWATER PAPER CALL Call 14 366.67 29 480.00 n/a n/a n/a
2019-07-26 2019-06-30 13F CLEARWATER PAPER CALL Call 3 -98.88 5 -99.05 n/a n/a n/a
2019-04-18 2019-03-31 13F CLEARWATER PAPER CALL Call 269 1,581.25 524 1,278.95 n/a n/a n/a
2019-01-16 2018-12-31 13F CLEARWATER PAPER CALL Call 16 -11.11 38 -28.30 n/a n/a n/a
2018-10-23 2018-09-30 13F CLEARWATER PAPER CALL Call 18 -37.93 53 -19.70 n/a n/a n/a
2018-07-30 2018-06-30 13F CLEARWATER PAPER CALL Call 29 -91.32 66 230.00 n/a n/a n/a
2018-04-26 2018-03-31 13F CLEARWATER PAPER CALL Call 334 4,671.43 20 1,900.00 n/a n/a n/a
2018-01-10 2017-12-31 13F CLEARWATER PAPER CALL Call 7 75.00 1 -50.00 n/a n/a n/a
2017-10-25 2017-09-30 13F CLEARWATER PAPER CALL Call 4 -55.56 2 0.00 n/a n/a n/a
2017-07-12 2017-06-30 13F CLEARWATER PAPER CALL Call 9 800.00 2 0.00 n/a n/a n/a
2017-04-21 2017-03-31 13F CLEARWATER PAPER CALL Call 1 -88.89 0 -100.00 n/a n/a n/a
2017-01-11 2016-12-31 13F CLEARWATER PAPER CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-10-07 2016-09-30 13F CLEARWATER PAPER CALL Call 11 -26.67 5 -28.57 n/a n/a n/a
2016-07-18 2016-06-30 13F CLEARWATER PAPER CALL Call 15 36.36 7 40.00 n/a n/a n/a
2016-01-20 2015-12-31 13F CLEARWATER PAPER CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-10-08 2015-09-30 13F CLEARWATER PAPER CALL Call 7 -22.22 0 -100.00 n/a n/a n/a
2015-07-08 2015-06-30 13F CLEARWATER PAPER CALL Call 9 200.00 1 n/a n/a n/a
2015-04-21 2015-03-31 13F CLEARWATER PAPER CALL Call 3 -57.14 0 -100.00 n/a n/a n/a
2015-03-04 2014-12-31 13F CLEARWATER PAPER CALL Call 7 13 n/a n/a n/a
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
(%)
2026-05-14 2026-03-31 13F CLEARWATER PAPER PUT Put 4,300 -20.37 62 -34.41 n/a n/a n/a
2026-02-11 2025-12-31 13F CLEARWATER PAPER PUT Put 5,400 -37.93 94 n/a n/a n/a
2025-11-12 2025-09-30 13F CLEARWATER PAPER PUT Put 8,700 2,800.00 0 n/a n/a n/a
2025-08-05 2025-06-30 13F CLEARWATER PAPER PUT Put 300 -97.32 0 n/a n/a n/a
2025-05-12 2025-03-31 13F CLEARWATER PAPER PUT Put 11,200 -51.93 0 n/a n/a n/a
2025-02-11 2024-12-31 13F CLEARWATER PAPER PUT Put 23,300 11,550.00 1 n/a n/a n/a
2024-11-08 2024-09-30 13F CLEARWATER PAPER PUT Put 200 -94.44 0 n/a n/a n/a
2024-07-25 2024-06-30 13F CLEARWATER PAPER PUT Put 3,600 -85.43 0 -100.00 n/a n/a n/a
2024-04-25 2024-03-31 13F CLEARWATER PAPER PUT Put 24,700 533.33 1 n/a n/a n/a
2024-02-02 2023-12-31 13F CLEARWATER PAPER PUT Put 3,900 1,200.00 0 n/a n/a n/a
2023-11-01 2023-09-30 13F CLEARWATER PAPER PUT Put 300 50.00 0 n/a n/a n/a
2023-08-04 2023-06-30 13F CLEARWATER PAPER PUT Put 200 -92.59 0 n/a n/a n/a
2023-04-27 2023-03-31 13F CLEARWATER PAPER PUT Put 2,700 0 n/a n/a n/a
2023-02-02 2022-12-31 13F CLEARWATER PAPER PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-04 2022-09-30 13F CLEARWATER PAPER PUT Put 100 -97.06 3 -97.37 n/a n/a n/a
2022-08-03 2022-06-30 13F CLEARWATER PAPER PUT Put 3,400 240.00 114 307.14 n/a n/a n/a
2022-05-02 2022-03-31 13F CLEARWATER PAPER PUT Put 1,000 -87.18 28 -90.21 n/a n/a n/a
2022-02-23 2021-12-31 13F/A CLEARWATER PAPER PUT Put 7,800 200.00 286 281.33 n/a n/a n/a
2022-02-04 2021-12-31 13F CLEARWATER PAPER PUT Put 2,600 75 n/a n/a n/a
2021-10-28 2021-09-30 13F CLEARWATER PAPER PUT Put 2,600 13.04 75 13.64 n/a n/a n/a
2021-08-12 2021-06-30 13F CLEARWATER PAPER PUT Put 2,300 45,900.00 66 266.67 n/a n/a n/a
2021-04-26 2021-03-31 13F CLEARWATER PAPER PUT Put 5 -64.29 18 -65.38 n/a n/a n/a
2021-02-02 2020-12-31 13F CLEARWATER PAPER PUT Put 14 -86.00 52 -86.28 n/a n/a n/a
2020-10-14 2020-09-30 13F CLEARWATER PAPER PUT Put 100 222.58 379 238.39 n/a n/a n/a
2020-07-13 2020-06-30 13F CLEARWATER PAPER PUT Put 31 3,000.00 112 5,500.00 n/a n/a n/a
2020-04-29 2020-03-31 13F CLEARWATER PAPER PUT Put 1 -66.67 2 -66.67 n/a n/a n/a
2020-02-05 2019-12-31 13F CLEARWATER PAPER PUT Put 3 -86.36 6 -86.96 n/a n/a n/a
2019-10-15 2019-09-30 13F CLEARWATER PAPER PUT Put 22 175.00 46 228.57 n/a n/a n/a
2019-07-26 2019-06-30 13F CLEARWATER PAPER PUT Put 8 -92.23 14 -93.00 n/a n/a n/a
2019-04-18 2019-03-31 13F CLEARWATER PAPER PUT Put 103 10.75 200 -11.50 n/a n/a n/a
2019-01-16 2018-12-31 13F CLEARWATER PAPER PUT Put 93 -3.12 226 -20.70 n/a n/a n/a
2018-10-23 2018-09-30 13F CLEARWATER PAPER PUT Put 96 113.33 285 176.70 n/a n/a n/a
2018-07-30 2018-06-30 13F CLEARWATER PAPER PUT Put 45 246.15 103 5,050.00 n/a n/a n/a
2018-04-26 2018-03-31 13F CLEARWATER PAPER PUT Put 13 -59.38 2 0.00 n/a n/a n/a
2018-01-10 2017-12-31 13F CLEARWATER PAPER PUT Put 32 255.56 2 0.00 n/a n/a n/a
2017-10-25 2017-09-30 13F CLEARWATER PAPER PUT Put 9 0 n/a n/a n/a
2016-10-07 2016-09-30 13F CLEARWATER PAPER PUT Put 0 -100.00 0 n/a n/a n/a
2016-07-18 2016-06-30 13F CLEARWATER PAPER PUT Put 4 0 n/a n/a n/a
2015-10-08 2015-09-30 13F CLEARWATER PAPER PUT Put 0 -100.00 0 n/a n/a n/a
2015-07-08 2015-06-30 13F CLEARWATER PAPER PUT Put 33 0.00 0 -100.00 n/a n/a n/a
2015-04-21 2015-03-31 13F CLEARWATER PAPER PUT Put 33 1 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.