Cerus Corporation
US ˙ NasdaqGM ˙ US1570851014

SecurityCERS / Cerus Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership22,140 shares
Latest Disclosed Value $ 45,608
Sei Investments Co ownership in CERS / Cerus Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 22,140 shares of Cerus Corporation (US:CERS) valued at $45,608 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 22,140 shares of Cerus Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $61,771 USD.

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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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 CERUS COM 157085101 22,140 0 0.00 46 28.57 0.0000
2025-11-13 2025-09-30 13F CERUS COM 157085101 22,140 0 0.00 35 12.90 0.0000
2025-08-14 2025-06-30 13F CERUS COM 157085101 22,140 0 0.00 31 3.33 0.0000
2025-05-14 2025-03-31 13F/A-1 CERUS COM 157085101 22,140 0 0.00 31 -11.76 0.0000
2025-05-13 2025-03-31 13F CERUS COM 157085101 22,140 0 34 0.0000
2025-02-11 2024-12-31 13F CERUS COM 157085101 22,140 0 0.00 34 -10.53 0.0000
2024-11-12 2024-09-30 13F CERUS COM 157085101 22,140 -241,699 -91.61 39 -91.81 0.0001
2024-08-13 2024-06-30 13F CERUS COM 157085101 263,839 229,074 658.92 464 613.85 0.0007
2024-05-07 2024-03-31 13F CERUS COM 157085101 34,765 34,765 66 0.0001
2022-11-14 2022-09-30 13F CERUS COM 157085101 0 -110,181 -100.00 0 -100.00
2022-08-15 2022-06-30 13F CERUS COM 157085101 110,181 -14,406 -11.56 583 -14.77 0.0013
2022-05-13 2022-03-31 13F CERUS COM 157085101 124,587 19,729 18.81 684 -4.20 0.0014
2022-02-14 2021-12-31 13F CERUS COM 157085101 104,858 355 0.34 714 12.26 0.0013
2021-11-12 2021-09-30 13F CERUS COM 157085101 104,503 -2,170 -2.03 636 0.95 0.0013
2021-08-06 2021-06-30 13F CERUS COM 157085101 106,673 8,394 8.54 630 6.60 0.0014
2021-05-12 2021-03-31 13F CERUS COM 157085101 98,279 18,118 22.60 591 6.49 0.0015
2021-02-08 2020-12-31 13F CERUS COM 157085101 80,161 -131,216 -62.08 555 -58.11 0.0014
2020-12-04 2020-09-30 13F/A-1 CERUS COM 157085101 211,377 132,228 167.06 1,325 153.83 0.0038
2020-11-06 2020-09-30 13F CERUS COM 157085101 211,719 132,570 1,327 3,195.1210
2020-08-17 2020-06-30 13F/A-1 CERUS COM 157085101 79,149 -5,017 -5.96 522 33.50 0.0016
2020-08-11 2020-06-30 13F CERUS COM 157085101 120,566 36,400 514 1,394.2524
2020-05-14 2020-03-31 13F CERUS COM 157085101 84,166 -33,946 -28.74 391 -21.49 0.0014
2020-02-06 2019-12-31 13F CERUS COM 157085101 118,112 18,987 19.15 498 -2.54 0.0015
2019-11-12 2019-09-30 13F CERUS COM 157085101 99,125 -10,607 -9.67 511 -17.18 0.0013
2019-08-14 2019-06-30 13F CERUS COM 157085101 109,732 20,384 22.81 617 10.97 0.0020
2019-05-15 2019-03-31 13F CERUS COM 157085101 89,348 88,833 17,249.13 556 13,800.00 0.0019
2019-02-13 2018-12-31 13F CERUS COM 157085101 515 0 0.00 4 0.00 0.0000
2018-11-08 2018-09-30 13F CERUS COM 157085101 515 515 4 0.0000
2017-11-06 2017-09-30 13F CERUS COM 157085101 0 -128 -100.00 0 0.0000
2017-07-31 2017-06-30 13F CERUS COM 157085101 128 0 0.00 0 -100.00
2017-05-05 2017-03-31 13F CERUS COM 157085101 128 0 0.00 1 0.00 0.0000
2017-02-02 2016-12-31 13F CERUS COM 157085101 128 0 0.00 1 0.00 0.0000
2016-11-04 2016-09-30 13F CERUS COM 157085101 128 0 0.00 1 0.00 0.0000
2016-08-11 2016-06-30 13F CERUS COM 157085101 128 0 0.00 1 0.00 0.0000
2016-05-10 2016-03-31 13F/A-1 CERUS COM 157085101 128 0 0.00 1 0.00 0.0000
2016-02-03 2015-12-31 13F CERUS COM 157085101 128 0 0.00 1 0.00 0.0000
2015-11-02 2015-09-30 13F/A-1 CERUS COM 157085101 128 0 0.00 1 0.00 0.0000
2015-10-30 2015-09-30 13F CERUS COM 157085101 128 1
2015-08-07 2015-06-30 13F/A-1 CERUS COM 157085101 128 0 0.00 1 0.00 0.0000
2015-08-04 2015-06-30 13F CERUS COM 157085101 128 0 1 0.0000
2015-05-14 2015-03-31 13F/A-1 CERUS COM 157085101 128 0 0.00 1 0.00 0.0000
2015-05-01 2015-03-31 13F CENVEO NOTE 7.000% 5/1 157085101 128 1
2015-02-10 2014-12-31 13F CERUS COM 157085101 128 128 1 0.0000
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.