Arcus Biosciences, Inc.
US ˙ NYSE ˙ US03969F1093

SecurityRCUS / Arcus Biosciences, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership26,396 shares
Latest Disclosed Value $ 570,154
Citigroup Inc ownership in RCUS / Arcus Biosciences, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 26,396 shares of Arcus Biosciences, Inc. (US:RCUS) valued at $570,154 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 32,258 shares of Arcus Biosciences, Inc.. This represents a change in shares of -18.17% during the quarter. The current value of the position is $629,809 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (RCUS) in the form of stock options. The firm currently holds call options representing 30,000 of underlying shares valued at $648,000 USD and put options representing 30,000 of underlying shares valued at $648,000 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.

RCUS / Arcus Biosciences, 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)
2026-05-11 2026-03-31 13F ARCUS BIOSCIENCES COM 03969F109 26,396 -5,862 -18.17 570 -25.78 0.0001
2026-02-13 2025-12-31 13F ARCUS BIOSCIENCES COM 03969F109 32,258 -4,506 -12.26 769 53.91 0.0003
2025-11-10 2025-09-30 13F ARCUS BIOSCIENCES COM 03969F109 36,764 -192,534 -83.97 500 -73.26 0.0002
2025-08-11 2025-06-30 13F ARCUS BIOSCIENCES COM 03969F109 229,298 19,376 9.23 1,866 13.30 0.0009
2025-05-12 2025-03-31 13F ARCUS BIOSCIENCES COM 03969F109 209,922 103,227 96.75 1,648 3.72 0.0008
2025-02-12 2024-12-31 13F ARCUS BIOSCIENCES COM 03969F109 106,695 40,739 61.77 1,589 57.54 0.0009
2024-11-12 2024-09-30 13F ARCUS BIOSCIENCES COM 03969F109 65,956 18,303 38.41 1,008 39.03 0.0006
2024-08-12 2024-06-30 13F ARCUS BIOSCIENCES COM 03969F109 47,653 -268,474 -84.93 726 -87.85 0.0005
2024-05-10 2024-03-31 13F ARCUS BIOSCIENCES COM 03969F109 316,127 188,896 148.47 5,968 145.60 0.0039
2024-02-09 2023-12-31 13F ARCUS BIOSCIENCES COM 03969F109 127,231 -18,498 -12.69 2,430 -7.07 0.0017
2023-12-06 2023-09-30 13F/A-1 ARCUS BIOSCIENCES COM 03969F109 145,729 25,083 20.79 2,616 6.73 0.0020
2023-11-09 2023-09-30 13F ARCUS BIOSCIENCES COM 03969F109 145,729 25,083 2,616 0.0008
2023-08-10 2023-06-30 13F ARCUS BIOSCIENCES COM 03969F109 120,646 -231,290 -65.72 2,450 -61.83 0.0016
2023-05-11 2023-03-31 13F ARCUS BIOSCIENCES COM 03969F109 351,936 225,255 177.81 6,419 145.09 0.0045
2023-02-09 2022-12-31 13F ARCUS BIOSCIENCES COM 03969F109 126,681 -108,002 -46.02 2,620 -57.34 0.0021
2022-11-10 2022-09-30 13F ARCUS BIOSCIENCES COM 03969F109 234,683 56,183 31.48 6,139 35.73 0.0044
2022-08-10 2022-06-30 13F ARCUS BIOSCIENCES COM 03969F109 178,500 145,896 447.48 4,523 339.55 0.0034
2022-05-12 2022-03-31 13F ARCUS BIOSCIENCES COM 03969F109 32,604 -76,296 -70.06 1,029 -76.65 0.0006
2022-02-10 2021-12-31 13F ARCUS BIOSCIENCES COM 03969F109 108,900 46,415 74.28 4,407 102.25 0.0024
2021-11-10 2021-09-30 13F ARCUS BIOSCIENCES COM 03969F109 62,485 -100,784 -61.73 2,179 -51.39 0.0013
2021-08-10 2021-06-30 13F ARCUS BIOSCIENCES COM 03969F109 163,269 45,873 39.08 4,483 36.01 0.0027
2021-05-13 2021-03-31 13F ARCUS BIOSCIENCES COM 03969F109 117,396 93,878 399.18 3,296 439.44 0.0021
2021-02-11 2020-12-31 13F ARCUS BIOSCIENCES COM 03969F109 23,518 15,972 211.66 611 373.64 0.0004
2020-11-12 2020-09-30 13F ARCUS BIOSCIENCES COM 03969F109 7,546 -18,875 -71.44 129 -80.28 0.0001
2020-08-12 2020-06-30 13F ARCUS BIOSCIENCES COM 03969F109 26,421 16,812 174.96 654 391.73 0.0005
2020-05-12 2020-03-31 13F ARCUS BIOSCIENCES COM 03969F109 9,609 24 0.25 133 37.11 0.0001
2020-02-12 2019-12-31 13F ARCUS BIOSCIENCES COM 03969F109 9,585 2,231 30.34 97 44.78 0.0001
2019-11-08 2019-09-30 13F ARCUS BIOSCIENCES COM 03969F109 7,354 -3,689 -33.41 67 -23.86 0.0001
2019-08-12 2019-06-30 13F ARCUS BIOSCIENCES COM 03969F109 11,043 -232 -2.06 88 -37.59 0.0001
2019-05-13 2019-03-31 13F ARCUS BIOSCIENCES COM 03969F109 11,275 -120 -1.05 141 15.57 0.0001
2019-02-12 2018-12-31 13F ARCUS BIOSCIENCES COM 03969F109 11,395 5,824 104.54 122 56.41 0.0001
2018-11-13 2018-09-30 13F ARCUS BIOSCIENCES COM 03969F109 5,571 1,757 46.07 78 65.96 0.0001
2018-08-10 2018-06-30 13F ARCUS BIOSCIENCES COM 03969F109 3,814 814 27.13 47 2.17 0.0000
2018-05-11 2018-03-31 13F ARCUS BIOSCIENCES COM 03969F109 3,000 3,000 46 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
(%)
2026-05-11 2026-03-31 13F ARCUS BIOSCIENCES COM Call 30,000 0.00 648 -9.24 n/a n/a n/a
2026-02-13 2025-12-31 13F ARCUS BIOSCIENCES COM Call 30,000 0.67 715 76.30 n/a n/a n/a
2025-11-10 2025-09-30 13F ARCUS BIOSCIENCES COM Call 29,800 0.00 405 67.36 n/a n/a n/a
2025-08-11 2025-06-30 13F ARCUS BIOSCIENCES COM Call 29,800 -50.08 243 -48.29 n/a n/a n/a
2025-05-12 2025-03-31 13F ARCUS BIOSCIENCES COM Call 59,700 99.67 469 5.17 n/a n/a n/a
2025-02-12 2024-12-31 13F ARCUS BIOSCIENCES COM Call 29,900 445 n/a n/a n/a
2023-05-11 2023-03-31 13F ARCUS BIOSCIENCES COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-09 2022-12-31 13F ARCUS BIOSCIENCES COM Call 20,000 11.11 414 -12.31 n/a n/a n/a
2022-11-10 2022-09-30 13F ARCUS BIOSCIENCES COM Call 18,000 210.34 471 220.41 n/a n/a n/a
2022-08-10 2022-06-30 13F ARCUS BIOSCIENCES COM Call 5,800 -22.67 147 -37.97 n/a n/a n/a
2022-05-12 2022-03-31 13F ARCUS BIOSCIENCES COM Call 7,500 237 n/a n/a n/a
2022-02-10 2021-12-31 13F ARCUS BIOSCIENCES COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-10 2021-09-30 13F ARCUS BIOSCIENCES COM Call 50,500 1,761 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
(%)
2026-05-11 2026-03-31 13F ARCUS BIOSCIENCES COM Put 30,000 0.00 648 -9.24 n/a n/a n/a
2026-02-13 2025-12-31 13F ARCUS BIOSCIENCES COM Put 30,000 0.67 715 76.30 n/a n/a n/a
2025-11-10 2025-09-30 13F ARCUS BIOSCIENCES COM Put 29,800 0.00 405 67.36 n/a n/a n/a
2025-08-11 2025-06-30 13F ARCUS BIOSCIENCES COM Put 29,800 -50.08 243 -48.29 n/a n/a n/a
2025-05-12 2025-03-31 13F ARCUS BIOSCIENCES COM Put 59,700 99.67 469 5.17 n/a n/a n/a
2025-02-12 2024-12-31 13F ARCUS BIOSCIENCES COM Put 29,900 445 n/a n/a n/a
2023-05-11 2023-03-31 13F ARCUS BIOSCIENCES COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-09 2022-12-31 13F ARCUS BIOSCIENCES COM Put 20,000 11.11 414 -12.31 n/a n/a n/a
2022-11-10 2022-09-30 13F ARCUS BIOSCIENCES COM Put 18,000 471 n/a n/a n/a
2022-08-10 2022-06-30 13F ARCUS BIOSCIENCES COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-12 2022-03-31 13F ARCUS BIOSCIENCES COM Put 7,500 237 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.