SEI Investments Company
US ˙ NasdaqGS ˙ US7841171033

SecuritySEIC / SEI Investments Company
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership20,832 shares
Latest Disclosed Value $ 1,708,667
Parallel Advisors, LLC ownership in SEIC / SEI Investments Company

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 20,832 shares of SEI Investments Company (US:SEIC) valued at $1,708,641 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 18,628 shares of SEI Investments Company. This represents a change in shares of 11.83% during the quarter. The current value of the position is $1,812,592 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (SEIC) in the form of stock options. The firm currently holds call 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.

SEIC / SEI Investments Company 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)
2026-02-11 2025-12-31 13F SEI INVESTMENTS Stock 784117103 20,832 2,204 11.83 1,709 8.10 0.0313
2025-11-13 2025-09-30 13F SEI INVESTMENTS Stock 784117103 18,628 646 3.59 1,581 -2.17 0.0289
2025-07-08 2025-06-30 13F SEI INVESTMENTS Stock 784117103 17,982 2,264 14.40 1,616 32.38 0.0323
2025-04-08 2025-03-31 13F SEI INVESTMENTS Stock 784117103 15,718 -1,543 -8.94 1,220 -14.27 0.0275
2025-02-10 2024-12-31 13F SEI INVESTMENTS Stock 784117103 17,261 158 0.92 1,424 20.29 0.0320
2024-11-13 2024-09-30 13F SEI INVESTMENTS Stock 784117103 17,103 -1,930 -10.14 1,183 -3.90 0.0278
2024-08-08 2024-06-30 13F SEI INVESTMENTS Stock 784117103 19,033 1,227 6.89 1,231 -3.83 0.0315
2024-05-06 2024-03-31 13F SEI INVESTMENTS Stock 784117103 17,806 6,690 60.18 1,280 81.30 0.0347
2024-02-12 2023-12-31 13F SEI INVESTMENTS Stock 784117103 11,116 93 0.84 706 6.49 0.0210
2024-05-20 2023-09-30 13F/A-1 SEI INVESTMENTS Stock 784117103 11,023 1,360 14.07 664 15.10 0.0221
2023-11-14 2023-09-30 13F SEI INVESTMENTS Stock 784117103 11,023 1,360 664 0.0221
2024-05-20 2023-06-30 13F/A-1 SEI INVESTMENTS Stock 784117103 9,663 630 6.97 576 10.98 0.0186
2023-08-04 2023-06-30 13F SEI INVESTMENTS Stock 784117103 9,663 630 576 0.0186
2024-05-20 2023-03-31 13F/A-1 SEI INVESTMENTS Stock 784117103 9,033 405 4.69 520 3.18 0.0175
2023-04-25 2023-03-31 13F SEI INVESTMENTS Stock 784117103 9,033 405 520 0.0175
2023-02-06 2022-12-31 13F SEI INVESTMENTS Stock 784117103 8,628 -9,797 -53.17 503 -44.36 0.0218
2022-11-10 2022-09-30 13F SEI INVESTMENTS Stock 784117103 18,425 5,964 47.86 904 34.32 0.0416
2022-08-01 2022-06-30 13F SEI INVESTMENTS Stock 784117103 12,461 2,864 29.84 673 14.46 0.0309
2022-04-28 2022-03-31 13F SEI INVESTMENTS Stock 784117103 9,597 7,697 405.11 588 406.90 0.0233
2022-01-20 2021-12-31 13F SEI INVESTMENTS Stock 784117103 1,900 1,364 254.48 116 262.50 0.0043
2021-11-02 2021-09-30 13F/A-1 SEI INVESTMENTS Stock 784117103 536 245 84.19 32 77.78 0.0013
2021-08-06 2021-06-30 13F SEI INVESTMENTS Stock 784117103 291 33 12.79 18 12.50 0.0008
2021-04-23 2021-03-31 13F SEI INVESTMENTS Stock 784117103 258 -31 -10.73 16 -5.88 0.0008
2021-02-02 2020-12-31 13F SEI INVESTMENTS Stock 784117103 289 -176 -37.85 17 -29.17 0.0009
2020-10-27 2020-09-30 13F SEI INVESTMENTS Stock 784117103 465 43 10.19 24 4.35 0.0015
2020-07-16 2020-06-30 13F SEI INVESTMENTS Stock 784117103 422 152 56.30 23 91.67 0.0015
2020-04-27 2020-03-31 13F SEI INVESTMENTS Stock 784117103 270 105 63.64 12 9.09 0.0010
2020-01-30 2019-12-31 13F SEI INVESTMENTS Stock 784117103 165 0 0.00 11 10.00 0.0008
2019-11-01 2019-09-30 13F SEI INVESTMENTS Stock 784117103 165 72 77.42 10 100.00 0.0009
2019-08-05 2019-06-30 13F SEI INVESTMENTS Stock 784117103 93 0 0.00 5 0.00 0.0005
2019-05-01 2019-03-31 13F SEI INVESTMENTS Stock 784117103 93 -21 -18.42 5 0.00 0.0006
2019-02-05 2018-12-31 13F SEI INVESTMENTS Stock 784117103 114 -219 -65.77 5 -75.00 0.0007
2018-11-01 2018-09-30 13F SEI INVESTMENTS Stock 784117103 333 0 0.00 20 0.00 0.0025
2018-07-30 2018-06-30 13F SEI INVESTMENTS Stock 784117103 333 277 494.64 20 400.00 0.0029
2018-05-08 2018-03-31 13F SEI INVESTMENTS Stock 784117103 56 0 0.00 4 0.00 0.0006
2018-02-13 2017-12-31 13F SEI INVESTMENTS CO COM Stock 784117103 56 0 0.00 4 0.00 0.0007
2017-11-15 2017-09-30 13F/A-1 SEI INVESTMENTS CO COM Stock 784117103 56 -44 -44.00 4 -33.33 0.0007
2017-08-07 2017-06-30 13F SEI INVESTMENTS CO COM Stock 784117103 100 72 257.14 6 500.00 0.0011
2017-05-12 2017-03-31 13F/A-1 SEI INVESTMENTS CO COM Stock 784117103 28 0 0.00 1 0.00 0.0002
2017-05-12 2017-03-31 13F SEI INVESTMENTS CO COM Stock 784117103 28 1
2017-02-14 2016-12-31 13F SEI INVESTMENTS CO COM Stock 784117103 28 28 1 0.0002
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
(%)
2022-01-19 2021-12-31 13F SEI INVESTMENTS Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F SEI INVESTMENTS Stock Call 291 18 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.