Mercer International Inc.
US ˙ NasdaqGS ˙ US5880561015

SecurityMERC / Mercer International Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership174,070 shares
Latest Disclosed Value $ 247,179
UBS Group AG ownership in MERC / Mercer International Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 174,070 shares of Mercer International Inc. (US:MERC) valued at $247,179 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 52,581 shares of Mercer International Inc.. This represents a change in shares of 231.05% during the quarter. The current value of the position is $151,006 USD.

UBS Group AG has a history of taking positions in derivatives of the underlying security (MERC) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 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.

MERC / Mercer International 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)
2026-05-05 2026-03-31 13F MERCER INTL COM 588056101 174,070 121,489 231.05 247 137.50 0.0000
2026-01-29 2025-12-31 13F MERCER INTL COM 588056101 52,581 13,618 34.95 104 -7.14 0.0000
2025-11-13 2025-09-30 13F MERCER INTL COM 588056101 38,963 10,423 36.52 112 13.13 0.0000
2025-08-14 2025-06-30 13F MERCER INTL COM 588056101 28,540 -3,397 -10.64 100 -49.49 0.0000
2025-05-13 2025-03-31 13F MERCER INTL COM 588056101 31,937 -9,585 -23.08 196 -27.14 0.0000
2025-02-14 2024-12-31 13F MERCER INTL COM 588056101 41,522 35,842 631.02 270 607.89 0.0000
2024-11-14 2024-09-30 13F MERCER INTL COM 588056101 5,680 -3,962 -41.09 38 -53.66 0.0000
2024-08-14 2024-06-30 13F MERCER INTL COM 588056101 9,642 4,163 75.98 82 51.85 0.0000
2024-05-13 2024-03-31 13F MERCER INTL COM 588056101 5,479 3,875 241.58 55 260.00 0.0000
2024-02-09 2023-12-31 13F MERCER INTL COM 588056101 1,604 1,604 15 0.0000
2023-11-09 2023-09-30 13F MERCER INTL COM 588056101 0 -18,445 -100.00 0 -100.00
2023-08-11 2023-06-30 13F MERCER INTL COM 588056101 18,445 8,513 85.71 149 52.58 0.0001
2023-05-12 2023-03-31 13F MERCER INTL COM 588056101 9,932 -10,483 -51.35 97 -59.07 0.0000
2023-02-08 2022-12-31 13F MERCER INTL COM 588056101 20,415 2,762 15.65 238 9.22 0.0001
2022-11-10 2022-09-30 13F MERCER INTL COM 588056101 17,653 17,653 217 0.0001
2022-08-10 2022-06-30 13F MERCER INTL COM 588056101 0 -4,157 -100.00 0 -100.00
2022-05-16 2022-03-31 13F MERCER INTL COM 588056101 4,157 1,659 66.41 58 93.33 0.0000
2022-02-14 2021-12-31 13F MERCER INTL COM 588056101 2,498 -5,004 -66.70 30 -65.52 0.0000
2021-11-15 2021-09-30 13F MERCER INTL COM 588056101 7,502 -6,115 -44.91 87 -50.00 0.0000
2021-08-13 2021-06-30 13F MERCER INTL COM 588056101 13,617 7,276 114.75 174 91.21 0.0001
2021-05-12 2021-03-31 13F MERCER INTL COM 588056101 6,341 -15,913 -71.51 91 -60.09 0.0000
2021-02-11 2020-12-31 13F MERCER INTL COM 588056101 22,254 8,261 59.04 228 147.83 0.0001
2020-11-12 2020-09-30 13F MERCER INTL COM 588056101 13,993 9,485 210.40 92 148.65 0.0000
2020-07-31 2020-06-30 13F MERCER INTL COM 588056101 4,508 2,357 109.58 37 146.67 0.0000
2020-05-01 2020-03-31 13F MERCER INTL COM 588056101 2,151 -123 -5.41 15 -46.43 0.0000
2020-02-14 2019-12-31 13F MERCER INTL COM 588056101 2,274 635 38.74 28 40.00 0.0000
2019-11-14 2019-09-30 13F MERCER INTL COM 588056101 1,639 1,329 428.71 20 300.00 0.0000
2019-08-14 2019-06-30 13F MERCER INTL COM 588056101 310 140 82.35 5 66.67 0.0000
2019-05-14 2019-03-31 13F MERCER INTL COM 588056101 170 170 3 0.0000
2018-02-14 2017-12-31 13F MERCER INTL COM 588056101 0 -1,232 -100.00 0 -100.00
2017-11-14 2017-09-30 13F MERCER INTL COM 588056101 1,232 -4,550 -78.69 15 -77.27 0.0000
2017-11-14 2017-06-30 13F/A-1 MERCER INTL COM 588056101 5,782 -1,689 -22.61 66 -24.14 0.0000
2017-08-14 2017-06-30 13F MERCER INTL COM 588056101 5,782 -1,689 66
2017-11-14 2017-03-31 13F/A-1 MERCER INTL COM 588056101 7,471 -3,640 -32.76 87 -26.27 0.0000
2017-05-12 2017-03-31 13F MERCER INTL COM 588056101 7,471 -3,640 87
2017-02-14 2016-12-31 13F MERCER INTL COM 588056101 11,111 1,768 18.92 118 49.37 0.0001
2016-11-14 2016-09-30 13F MERCER INTL COM 588056101 9,343 4,820 106.57 79 119.44 0.0000
2016-08-12 2016-06-30 13F MERCER INTL COM 588056101 4,523 -947 -17.31 36 -30.77 0.0000
2016-05-12 2016-03-31 13F MERCER INTL COM 588056101 5,470 947 20.94 52 26.83 0.0000
2016-02-16 2015-12-31 13F MERCER INTL COM 588056101 4,523 -3,313 -42.28 41 -48.10 0.0000
2015-11-13 2015-09-30 13F MERCER INTL COM 588056101 7,836 -394,453 -98.05 79 -98.56 0.0001
2015-08-14 2015-06-30 13F MERCER INTL COM 588056101 402,289 164,758 69.36 5,503 50.85 0.0037
2015-05-14 2015-03-31 13F MERCER INTL COM 588056101 237,531 237,531 3,648 0.0025
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
(%)
2015-05-14 2015-03-31 13F MERCER INTL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-02-17 2014-12-31 13F MERCER INTL COM Call 800 10 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
(%)
2015-05-14 2015-03-31 13F MERCER INTL COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2015-02-17 2014-12-31 13F MERCER INTL COM Put 400 5 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.