AnaptysBio, Inc.
US ˙ NasdaqGS ˙ US0327241065

SecurityANAB / AnaptysBio, Inc.
InstitutionBarclays Plc
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Barclays Plc ownership in ANAB / AnaptysBio, Inc.

On May 15, 2026 - Barclays Plc filed a 13F-HR form disclosing ownership of 0 shares of AnaptysBio, Inc. (US:ANAB) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 59,654 shares of AnaptysBio, Inc.. This represents a change in shares of -100.00% during the quarter. The current value of the position is $0 USD.

Barclays Plc has a history of taking positions in derivatives of the underlying security (ANAB) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put 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.

ANAB / AnaptysBio, 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)
2026-05-15 2026-03-31 13F ANAPTYSBIO COM 032724106 0 -59,654 -100.00 0 -100.00
2026-02-13 2025-12-31 13F ANAPTYSBIO COM 032724106 59,654 -3,798 -5.99 2,892 48.92 0.0007
2026-03-31 2025-09-30 13F/A-3 ANAPTYSBIO COM 032724106 63,452 -36,547 -36.55 1,943 -12.48 0.0004
2026-03-19 2025-09-30 13F/A-2 ANAPTYSBIO COM 032724106 44,300 -55,699 1,484 0.0004
2025-11-12 2025-09-30 13F ANAPTYSBIO COM 032724106 63,452 -36,547 1,943 0.0004
2026-02-27 2025-06-30 13F/A-2 ANAPTYSBIO COM 032724106 99,999 43,780 77.87 2,220 112.34 0.0005
2025-08-14 2025-06-30 13F/A-1 ANAPTYSBIO COM 032724106 99,999 43,780 2 0.0005
2025-08-13 2025-06-30 13F ANAPTYSBIO COM 032724106 99,999 43,780 2 0.0002
2026-03-17 2025-03-31 13F/A-1 ANAPTYSBIO COM 032724106 56,219 -27,348 -32.73 1,045 -5.52 0.0003
2025-05-15 2025-03-31 13F ANAPTYSBIO COM 032724106 56,219 -27,348 1 0.0003
2026-03-19 2024-12-31 13F/A-1 ANAPTYSBIO COM 032724106 83,567 39,267 88.64 1,106 -25.47 0.0003
2025-02-13 2024-12-31 13F ANAPTYSBIO COM 032724106 83,567 39,267 1 0.0003
2026-03-31 2024-09-30 13F/A-2 ANAPTYSBIO COM 032724106 44,300 23,926 117.43 1,484 190.98 0.0004
2024-11-19 2024-09-30 13F/A-1 ANAPTYSBIO COM 032724106 44,300 23,926 1 0.0004
2024-11-15 2024-09-30 13F ANAPTYSBIO COM 032724106 44,300 23,926 1 0.0001
2026-03-23 2024-06-30 13F/A-1 ANAPTYSBIO COM 032724106 20,374 -8,948 -30.52 511 -22.73 0.0002
2024-08-14 2024-06-30 13F ANAPTYSBIO COM 032724106 20,374 -8,948 1 0.0002
2026-03-24 2024-03-31 13F/A-1 ANAPTYSBIO COM 032724106 29,322 14 0.05 660 5.26 0.0002
2024-05-15 2024-03-31 13F ANAPTYSBIO COM 032724106 29,322 14 1 0.0002
2026-03-25 2023-12-31 13F/A-1 ANAPTYSBIO COM 032724106 29,308 -6,761 -18.74 628 -3.09 0.0002
2024-02-15 2023-12-31 13F ANAPTYSBIO COM 032724106 29,308 -6,761 1 0.0002
2026-03-26 2023-09-30 13F/A-1 ANAPTYSBIO COM 032724106 36,069 -12,593 -25.88 648 -34.58 0.0004
2023-11-07 2023-09-30 13F ANAPTYSBIO COM 032724106 36,069 -12,593 1 0.0004
2026-03-30 2023-06-30 13F/A-2 ANAPTYSBIO COM 032724106 48,662 14,308 41.65 990 32.40 0.0006
2023-09-20 2023-06-30 13F/A-1 ANAPTYSBIO COM 032724106 48,662 14,308 1 0.0006
2023-08-03 2023-06-30 13F ANAPTYSBIO COM 032724106 48,662 14,308 1 0.0006
2026-03-30 2023-03-31 13F/A-1 ANAPTYSBIO COM 032724106 34,354 -5,997 -14.86 748 -40.24 0.0003
2023-05-04 2023-03-31 13F ANAPTYSBIO COM 032724106 34,354 -5,997 1 0.0003
2026-03-30 2022-12-31 13F/A-1 ANAPTYSBIO COM 032724106 40,351 -8,422 -17.27 1,250 0.48 0.0006
2023-02-13 2022-12-31 13F ANAPTYSBIO COM 032724106 40,351 -8,422 1 0.0006
2022-11-03 2022-09-30 13F ANAPTYSBIO COM 032724106 48,773 47,755 4,691.06 1,244 5,823.81 0.0014
2022-08-12 2022-06-30 13F ANAPTYSBIO COM 032724106 1,018 -2,195 -68.32 21 -73.75 0.0000
2022-05-16 2022-03-31 13F ANAPTYSBIO COM 032724106 3,213 -20,190 -86.27 80 -90.16 0.0001
2022-02-23 2021-12-31 13F/A-1 ANAPTYSBIO COM 032724106 23,403 11,674 99.53 813 154.86 0.0003
2022-02-14 2021-12-31 13F ANAPTYSBIO COM 032724106 23,403 11,674 813 0.0001
2021-11-09 2021-09-30 13F ANAPTYSBIO COM 032724106 11,729 8,004 214.87 319 228.87 0.0001
2021-08-13 2021-06-30 13F ANAPTYSBIO COM 032724106 3,725 -14,174 -79.19 97 -74.87 0.0000
2021-05-13 2021-03-31 13F ANAPTYSBIO COM 032724106 17,899 10,520 142.57 386 144.30 0.0002
2021-02-11 2020-12-31 13F ANAPTYSBIO COM 032724106 7,379 -12,461 -62.81 158 -45.89 0.0001
2020-11-12 2020-09-30 13F ANAPTYSBIO COM 032724106 19,840 -4,052 -16.96 292 -45.32 0.0002
2020-08-12 2020-06-30 13F ANAPTYSBIO COM 032724106 23,892 -154,379 -86.60 534 -78.79 0.0004
2020-05-13 2020-03-31 13F ANAPTYSBIO COM 032724106 178,271 149,556 520.83 2,518 440.34 0.0020
2020-02-10 2019-12-31 13F ANAPTYSBIO COM 032724106 28,715 594 2.11 466 -52.64 0.0003
2019-11-15 2019-09-30 13F/A-1 ANAPTYSBIO COM 032724106 28,121 -5,018 -15.14 984 -47.38 0.0006
2019-11-14 2019-09-30 13F ANAPTYSBIO COM 032724106 28,121 -5,018 984 227.5019
2019-08-14 2019-06-30 13F ANAPTYSBIO COM 032724106 33,139 12,858 63.40 1,870 26.18 0.0011
2019-05-15 2019-03-31 13F ANAPTYSBIO COM 032724106 20,281 6,007 42.08 1,482 62.68 0.0010
2019-02-14 2018-12-31 13F ANAPTYSBIO COM 032724106 14,274 -110,318 -88.54 911 -92.67 0.0007
2018-11-14 2018-09-30 13F ANAPTYSBIO COM 032724106 124,592 112,067 894.75 12,431 1,296.74 0.0086
2018-08-14 2018-06-30 13F ANAPTYSBIO COM 032724106 12,525 3,644 41.03 890 -3.68 0.0008
2018-05-15 2018-03-31 13F ANAPTYSBIO COM 032724106 8,881 6,051 213.82 924 224.21 0.0007
2018-02-14 2017-12-31 13F ANAPTYSBIO COM 032724106 2,830 2,552 917.99 285 2,750.00 0.0002
2017-11-14 2017-09-30 13F ANAPTYSBIO COM 032724106 278 -226 -44.84 10 -16.67 0.0000
2017-08-14 2017-06-30 13F ANAPTYSBIO COM 032724106 504 -427 -45.86 12 -53.85 0.0000
2017-05-15 2017-03-31 13F ANAPTYSBIO COM 032724106 931 931 26 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
(%)
2026-03-23 2024-06-30 13F/A ANAPTYSBIO OPT Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-08-14 2024-06-30 13F ANAPTYSBIO OPT Call 0 0 n/a n/a n/a
2026-03-24 2024-03-31 13F/A ANAPTYSBIO OPT Call 30,000 676 n/a n/a n/a
2024-05-15 2024-03-31 13F ANAPTYSBIO OPT Call 30,000 1 n/a n/a n/a
2021-08-13 2021-06-30 13F ANAPTYSBIO OPT Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-13 2021-03-31 13F ANAPTYSBIO OPT Call 3,500 75 n/a n/a n/a
2019-02-14 2018-12-31 13F ANAPTYSBIO OPT Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-11-14 2018-09-30 13F ANAPTYSBIO OPT Call 97,300 9,708 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
(%)
2026-03-23 2024-06-30 13F/A ANAPTYSBIO OPT Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-08-14 2024-06-30 13F ANAPTYSBIO OPT Put 0 0 n/a n/a n/a
2026-03-24 2024-03-31 13F/A ANAPTYSBIO OPT Put 30,000 676 n/a n/a n/a
2024-05-15 2024-03-31 13F ANAPTYSBIO OPT Put 30,000 1 n/a n/a n/a
2019-05-15 2019-03-31 13F ANAPTYSBIO OPT Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-02-14 2018-12-31 13F ANAPTYSBIO OPT Put 8,800 -87.26 561 -91.86 n/a n/a n/a
2018-11-14 2018-09-30 13F ANAPTYSBIO OPT Put 69,100 157.84 6,894 262.08 n/a n/a n/a
2018-08-14 2018-06-30 13F ANAPTYSBIO OPT Put 26,800 148.15 1,904 69.40 n/a n/a n/a
2018-05-15 2018-03-31 13F ANAPTYSBIO OPT Put 10,800 1,124 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.