附件公司
US ˙ NasdaqGS ˙ US03589W1027

SecurityANNX / Annexon, Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership1,245,941 shares
Latest Disclosed Value $ 6,902,513
UBS Group AG ownership in ANNX / Annexon, Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 1,245,941 shares of Annexon, Inc. (US:ANNX) valued at $6,902,513 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 377,104 shares of Annexon, Inc.. This represents a change in shares of 230.40% during the quarter. The current value of the position is $6,790,378 USD.

UBS Group AG has a history of taking positions in derivatives of the underlying security (ANNX) in the form of stock options. The firm currently holds call options representing 50,000 of underlying shares valued at $277,000 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.

ANNX / Annexon, 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 ANNEXON COM 03589W102 1,245,941 868,837 230.40 6,903 264.61 0.0002
2026-01-29 2025-12-31 13F ANNEXON COM 03589W102 377,104 30,965 8.95 1,893 79.43 0.0001
2025-11-13 2025-09-30 13F ANNEXON COM 03589W102 346,139 21,017 6.46 1,056 35.26 0.0002
2025-08-14 2025-06-30 13F ANNEXON COM 03589W102 325,122 57,774 21.61 780 51.46 0.0001
2025-05-13 2025-03-31 13F ANNEXON COM 03589W102 267,348 -61,373 -18.67 516 -69.45 0.0001
2025-02-14 2024-12-31 13F ANNEXON COM 03589W102 328,721 109,594 50.01 1,686 29.99 0.0003
2024-11-14 2024-09-30 13F ANNEXON COM 03589W102 219,127 143,554 189.95 1,297 250.54 0.0003
2024-08-14 2024-06-30 13F ANNEXON COM 03589W102 75,573 -15,473 -16.99 370 -43.25 0.0001
2024-05-13 2024-03-31 13F ANNEXON COM 03589W102 91,046 41,460 83.61 653 189.78 0.0002
2024-02-09 2023-12-31 13F ANNEXON COM 03589W102 49,586 24,937 101.17 225 287.93 0.0001
2023-11-09 2023-09-30 13F ANNEXON COM 03589W102 24,649 -2,282 -8.47 58 -38.30 0.0000
2023-08-11 2023-06-30 13F ANNEXON COM 03589W102 26,931 26,931 95 0.0000
2023-05-12 2023-03-31 13F ANNEXON COM 03589W102 0 -4,100 -100.00 0 -100.00
2023-02-08 2022-12-31 13F ANNEXON COM 03589W102 4,100 1,210 41.87 21 16.67 0.0000
2022-11-10 2022-09-30 13F ANNEXON COM 03589W102 2,890 -86,614 -96.77 18 -94.67 0.0000
2022-08-10 2022-06-30 13F ANNEXON COM 03589W102 89,504 89,504 338 0.0001
2022-05-16 2022-03-31 13F ANNEXON COM 03589W102 0 -54,146 -100.00 0 -100.00
2022-02-14 2021-12-31 13F ANNEXON COM 03589W102 54,146 54,146 622 0.0002
2021-08-13 2021-06-30 13F ANNEXON COM 03589W102 0 -364 -100.00 0 -100.00
2021-05-12 2021-03-31 13F ANNEXON COM 03589W102 364 -8,403 -95.85 10 -95.43 0.0000
2021-02-11 2020-12-31 13F ANNEXON COM 03589W102 8,767 8,393 2,244.12 219 1,890.91 0.0001
2020-11-12 2020-09-30 13F ANNEXON COM 03589W102 374 374 11 0.0000
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
(%)
2026-05-05 2026-03-31 13F ANNEXON COM Call 50,000 277 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.