Guardant Health, Inc.
US ˙ NasdaqGS ˙ US40131M1099

SecurityGH / Guardant Health, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership174,072 shares
Latest Disclosed Value $ 16,079,031
Citigroup Inc ownership in GH / Guardant Health, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 174,072 shares of Guardant Health, Inc. (US:GH) valued at $16,079,031 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 188,888 shares of Guardant Health, Inc.. This represents a change in shares of -7.84% during the quarter. The current value of the position is $22,112,366 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (GH) 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.

GH / Guardant Health, 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 GUARDANT HEALTH COM 40131M109 174,072 -14,816 -7.84 16,079 -16.66 0.0069
2026-02-13 2025-12-31 13F GUARDANT HEALTH COM 40131M109 188,888 169,674 883.07 19,293 1,507.75 0.0085
2025-11-10 2025-09-30 13F GUARDANT HEALTH COM 40131M109 19,214 -64,281 -76.99 1,200 -72.38 0.0005
2025-08-11 2025-06-30 13F GUARDANT HEALTH COM 40131M109 83,495 -12,190 -12.74 4,345 6.60 0.0021
2025-05-12 2025-03-31 13F GUARDANT HEALTH COM 40131M109 95,685 -7,518 -7.28 4,076 29.31 0.0021
2025-02-12 2024-12-31 13F GUARDANT HEALTH COM 40131M109 103,203 -11,438 -9.98 3,153 19.89 0.0019
2024-11-12 2024-09-30 13F GUARDANT HEALTH COM 40131M109 114,641 83,365 266.55 2,630 191.14 0.0015
2024-08-12 2024-06-30 13F GUARDANT HEALTH COM 40131M109 31,276 -7,367 -19.06 903 13.30 0.0006
2024-05-10 2024-03-31 13F GUARDANT HEALTH COM 40131M109 38,643 5,729 17.41 797 -10.45 0.0005
2024-02-09 2023-12-31 13F GUARDANT HEALTH COM 40131M109 32,914 16,309 98.22 890 80.89 0.0006
2023-12-06 2023-09-30 13F/A-1 GUARDANT HEALTH COM 40131M109 16,605 -40,701 -71.02 492 -76.01 0.0004
2023-11-09 2023-09-30 13F GUARDANT HEALTH COM 40131M109 16,605 -40,701 492 0.0001
2023-08-10 2023-06-30 13F GUARDANT HEALTH COM 40131M109 57,306 -44,711 -43.83 2,052 -14.22 0.0013
2023-05-11 2023-03-31 13F GUARDANT HEALTH COM 40131M109 102,017 84,481 481.76 2,391 402.31 0.0017
2023-02-09 2022-12-31 13F GUARDANT HEALTH COM 40131M109 17,536 -10,111 -36.57 477 -67.99 0.0004
2022-11-10 2022-09-30 13F GUARDANT HEALTH COM 40131M109 27,647 -3,386 -10.91 1,487 18.86 0.0011
2022-08-10 2022-06-30 13F GUARDANT HEALTH COM 40131M109 31,033 -3,703 -10.66 1,251 -45.63 0.0009
2022-05-12 2022-03-31 13F GUARDANT HEALTH COM 40131M109 34,736 -39,913 -53.47 2,301 -69.18 0.0014
2022-02-10 2021-12-31 13F GUARDANT HEALTH COM 40131M109 74,649 38,543 106.75 7,466 65.43 0.0040
2021-11-10 2021-09-30 13F GUARDANT HEALTH COM 40131M109 36,106 -45,589 -55.80 4,513 -55.52 0.0027
2021-08-10 2021-06-30 13F GUARDANT HEALTH COM 40131M109 81,695 11,250 15.97 10,146 -5.65 0.0061
2021-05-13 2021-03-31 13F GUARDANT HEALTH COM 40131M109 70,445 599 0.86 10,754 19.46 0.0070
2021-02-11 2020-12-31 13F GUARDANT HEALTH COM 40131M109 69,846 564 0.81 9,002 16.24 0.0053
2020-11-12 2020-09-30 13F GUARDANT HEALTH COM 40131M109 69,282 -6,943 -9.11 7,744 25.23 0.0051
2020-08-12 2020-06-30 13F GUARDANT HEALTH COM 40131M109 76,225 4,233 5.88 6,184 23.43 0.0048
2020-05-12 2020-03-31 13F GUARDANT HEALTH COM 40131M109 71,992 54,345 307.96 5,010 263.31 0.0045
2020-02-12 2019-12-31 13F GUARDANT HEALTH COM 40131M109 17,647 11,252 175.95 1,379 237.99 0.0010
2019-11-08 2019-09-30 13F GUARDANT HEALTH COM 40131M109 6,395 4,110 179.87 408 107.11 0.0003
2019-08-12 2019-06-30 13F GUARDANT HEALTH COM 40131M109 2,285 548 31.55 197 48.12 0.0002
2019-05-13 2019-03-31 13F GUARDANT HEALTH COM 40131M109 1,737 -759 -30.41 133 41.49 0.0001
2019-02-12 2018-12-31 13F GUARDANT HEALTH COM 40131M109 2,496 2,496 94 0.0001
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
(%)
2024-08-12 2024-06-30 13F GUARDANT HEALTH COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-10 2024-03-31 13F GUARDANT HEALTH COM Call 147,600 3,045 n/a n/a n/a
2023-05-11 2023-03-31 13F GUARDANT HEALTH COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-09 2022-12-31 13F GUARDANT HEALTH COM Call 70,000 -41.62 1,904 -70.50 n/a n/a n/a
2022-11-10 2022-09-30 13F GUARDANT HEALTH COM Call 119,900 86.47 6,454 148.80 n/a n/a n/a
2022-08-10 2022-06-30 13F GUARDANT HEALTH COM Call 64,300 2,594 n/a n/a n/a
2020-02-12 2019-12-31 13F GUARDANT HEALTH COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-11-08 2019-09-30 13F GUARDANT HEALTH COM Call 20,400 1,302 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
(%)
2024-08-12 2024-06-30 13F GUARDANT HEALTH COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-10 2024-03-31 13F GUARDANT HEALTH COM Put 85,500 1,764 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.