ACCO Brands Corporation
US ˙ NYSE ˙ US00081T1088

SecurityACCO / ACCO Brands Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership304,759 shares
Latest Disclosed Value $ 1,136,767
Sei Investments Co ownership in ACCO / ACCO Brands Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 304,759 shares of ACCO Brands Corporation (US:ACCO) valued at $1,136,751 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 233,682 shares of ACCO Brands Corporation. This represents a change in shares of 30.42% during the quarter. The current value of the position is $1,170,275 USD.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (ACCO) 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.

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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.

ACCO / ACCO Brands 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)
2026-02-13 2025-12-31 13F ACCO BRANDS COM 00081T108 304,759 71,077 30.42 1,137 21.89 0.0011
2025-11-13 2025-09-30 13F ACCO BRANDS COM 00081T108 233,682 -71,797 -23.50 932 -14.73 0.0010
2025-08-14 2025-06-30 13F ACCO BRANDS COM 00081T108 305,479 64,239 26.63 1,094 8.22 0.0013
2025-05-14 2025-03-31 13F/A-1 ACCO BRANDS COM 00081T108 241,240 -30,011 -11.06 1,011 -29.07 0.0013
2025-05-13 2025-03-31 13F ACCO BRANDS COM 00081T108 257,701 -13,550 1,246 0.0014
2025-02-11 2024-12-31 13F ACCO BRANDS COM 00081T108 271,251 -17,091 -5.93 1,424 -9.70 0.0018
2024-11-12 2024-09-30 13F ACCO BRANDS COM 00081T108 288,342 37,399 14.90 1,577 33.76 0.0020
2024-08-13 2024-06-30 13F ACCO BRANDS COM 00081T108 250,943 72,051 40.28 1,179 17.55 0.0017
2024-05-07 2024-03-31 13F ACCO BRANDS COM 00081T108 178,892 -64,953 -26.64 1,004 -32.32 0.0015
2024-02-14 2023-12-31 13F ACCO BRANDS COM 00081T108 243,845 -13,290 -5.17 1,483 0.47 0.0024
2023-11-14 2023-09-30 13F ACCO BRANDS COM 00081T108 257,135 23,641 10.12 1,476 21.30 0.0027
2023-08-11 2023-06-30 13F ACCO BRANDS COM 00081T108 233,494 14,429 6.59 1,216 4.38 0.0021
2023-05-12 2023-03-31 13F ACCO BRANDS COM 00081T108 219,065 73,284 50.27 1,165 43.12 0.0022
2023-02-10 2022-12-31 13F ACCO BRANDS COM 00081T108 145,781 -38,324 -20.82 815 -9.76 0.0018
2022-11-14 2022-09-30 13F ACCO BRANDS COM 00081T108 184,105 -11,335 -5.80 902 -29.37 0.0020
2022-08-15 2022-06-30 13F ACCO BRANDS COM 00081T108 195,440 34,919 21.75 1,277 -0.62 0.0028
2022-05-13 2022-03-31 13F ACCO BRANDS COM 00081T108 160,521 90,143 128.08 1,285 121.55 0.0026
2022-02-14 2021-12-31 13F ACCO BRANDS COM 00081T108 70,378 993 1.43 580 -2.85 0.0011
2021-11-12 2021-09-30 13F ACCO BRANDS COM 00081T108 69,385 2,048 3.04 597 2.93 0.0013
2021-08-06 2021-06-30 13F ACCO BRANDS COM 00081T108 67,337 -3,414 -4.83 580 -2.85 0.0013
2021-05-12 2021-03-31 13F ACCO BRANDS COM 00081T108 70,751 12,500 21.46 597 21.34 0.0015
2021-02-08 2020-12-31 13F ACCO BRANDS COM 00081T108 58,251 -8,336 -12.52 492 28.13 0.0013
2020-12-04 2020-09-30 13F/A-1 ACCO BRANDS COM 00081T108 66,587 18,505 38.49 384 12.61 0.0011
2020-11-06 2020-09-30 13F ACCO BRANDS COM 00081T108 66,587 18,505 384 924.5866
2020-08-17 2020-06-30 13F/A-1 ACCO BRANDS COM 00081T108 48,082 11,600 31.80 341 85.33 0.0011
2020-08-11 2020-06-30 13F ACCO BRANDS COM 00081T108 51,572 15,090 483 1,310.1632
2020-05-14 2020-03-31 13F ACCO BRANDS COM 00081T108 36,482 -15,453 -29.75 184 -61.90 0.0007
2020-02-06 2019-12-31 13F ACCO BRANDS COM 00081T108 51,935 23,818 84.71 483 72.50 0.0014
2019-11-12 2019-09-30 13F ACCO BRANDS COM 00081T108 28,117 12 0.04 280 26.70 0.0007
2019-08-14 2019-06-30 13F ACCO BRANDS COM 00081T108 28,105 -10,582 -27.35 221 -33.03 0.0007
2019-05-15 2019-03-31 13F ACCO BRANDS COM 00081T108 38,687 38,394 13,103.75 330 16,400.00 0.0011
2019-02-13 2018-12-31 13F ACCO BRANDS COM 00081T108 293 88 42.93 2 -33.33 0.0000
2018-11-08 2018-09-30 13F ACCO BRANDS COM 00081T108 205 -1,690 -89.18 3 -88.46 0.0000
2018-08-03 2018-06-30 13F ACCO BRANDS COM 00081T108 1,895 286 17.78 26 30.00 0.0001
2018-05-11 2018-03-31 13F ACCO BRANDS COM 00081T108 1,609 136 9.23 20 11.11 0.0001
2018-02-08 2017-12-31 13F ACCO BRANDS COM 00081T108 1,473 32 2.22 18 5.88 0.0001
2017-11-06 2017-09-30 13F ACCO BRANDS COM 00081T108 1,441 130 9.92 17 13.33 0.0001
2017-07-31 2017-06-30 13F ACCO BRANDS COM 00081T108 1,311 350 36.42 15 15.38 0.0001
2017-05-05 2017-03-31 13F ACCO BRANDS COM 00081T108 961 -14 -1.44 13 0.00 0.0001
2017-02-02 2016-12-31 13F ACCO BRANDS COM 00081T108 975 14 1.46 13 44.44 0.0001
2016-11-04 2016-09-30 13F ACCO BRANDS COM 00081T108 961 13 1.37 9 -10.00 0.0000
2016-08-11 2016-06-30 13F ACCO BRANDS COM 00081T108 948 -264 -21.78 10 -9.09 0.0001
2016-05-10 2016-03-31 13F/A-1 ACCO BRANDS COM 00081T108 1,212 -1,765 -59.29 11 -47.62 0.0001
2016-02-03 2015-12-31 13F ACCO BRANDS COM 00081T108 2,977 2,354 377.85 21 425.00 0.0001
2015-11-02 2015-09-30 13F/A-1 ACCO BRANDS COM 00081T108 623 51 8.92 4 0.00 0.0000
2015-10-30 2015-09-30 13F ACCO BRANDS COM 00081T108 623 6
2015-08-07 2015-06-30 13F/A-1 ACCO BRANDS COM 00081T108 572 -403 -41.33 4 -50.00 0.0000
2015-08-04 2015-06-30 13F ACCO BRANDS COM 00081T108 572 -403 4 0.0000
2015-05-14 2015-03-31 13F/A-1 ACCO BRANDS COM 00081T108 975 973 48,650.00 8 0.0001
2015-05-01 2015-03-31 13F ABB PUT 00081T108 975 975 8 0.0001
2015-02-10 2014-12-31 13F ACCO BRANDS COM 00081T108 2 2 0 0.0000
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 ABB PUT 975 8 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.