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MX ˙ BMV ˙ US31188V1008
SecurityMX:FSLY / Fastly, Inc.
InstitutionHighTower Advisors, LLC
Latest Disclosed Ownership7,982 shares
Latest Disclosed Value $ 231,966
HighTower Advisors, LLC ownership in FSLY / Fastly, Inc.

On May 5, 2026 - HighTower Advisors, LLC filed a 13F-HR form disclosing ownership of 7,982 shares of Fastly, Inc. (MX:FSLY) valued at $231,966 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 7, 2025 disclosing 0 shares of Fastly, Inc..

HighTower Advisors, LLC has a history of taking positions in derivatives of the underlying security (FSLY) 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.

MX:FSLY / Fastly, 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 FASTLY CL A 31188V100 7,982 7,982 232 0.0002
2025-02-07 2024-12-31 13F FASTLY CL A 31188V100 0 -100.00 0
2024-11-14 2024-09-30 13F FASTLY CL A 31188V100 14,093 -9,766 -40.93 107 -38.51 0.0002
2024-08-13 2024-06-30 13F FASTLY CL A 31188V100 23,859 -10,554 -30.67 174 -60.99 0.0003
2024-05-06 2024-03-31 13F FASTLY CL A 31188V100 34,413 -2,692 -7.26 446 -32.53 0.0007
2024-02-12 2023-12-31 13F FASTLY CL A 31188V100 37,105 -9,263 -19.98 661 -25.48 0.0011
2023-11-08 2023-09-30 13F FASTLY CL A 31188V100 46,368 2,907 6.69 887 29.11 0.0017
2023-08-14 2023-06-30 13F FASTLY CL A 31188V100 43,461 2,322 5.64 687 -5.89 0.0014
2023-05-12 2023-03-31 13F FASTLY CL A 31188V100 41,139 -1,841 -4.28 730 106.80 0.0016
2023-02-09 2022-12-31 13F FASTLY CL A 31188V100 42,980 -14,832 -25.66 353 -33.52 0.0008
2022-11-09 2022-09-30 13F FASTLY CL A 31188V100 57,812 -11,432 -16.51 531 -33.96 0.0014
2022-08-10 2022-06-30 13F FASTLY CL A 31188V100 69,244 -4,039 -5.51 804 -36.84 0.0021
2022-05-12 2022-03-31 13F FASTLY CL A 31188V100 73,283 11,595 18.80 1,273 -41.74 0.0028
2022-02-10 2021-12-31 13F FASTLY CL A 31188V100 61,688 -29,071 -32.03 2,185 -40.45 0.0048
2021-11-12 2021-09-30 13F FASTLY CL A 31188V100 90,759 16,065 21.51 3,669 -17.59 0.0098
2021-08-06 2021-06-30 13F FASTLY CL A 31188V100 74,694 11,961 19.07 4,452 5.57 0.0129
2021-05-10 2021-03-31 13F FASTLY CL A 31188V100 62,733 37,159 145.30 4,217 88.76 0.0133
2021-02-10 2020-12-31 13F FASTLY CL A 31188V100 25,574 -12,881 -33.50 2,234 -37.88 0.0093
2020-11-13 2020-09-30 13F FASTLY CL A 31188V100 38,455 2,753 7.71 3,596 18.33 0.0174
2020-08-10 2020-06-30 13F FASTLY CL A 31188V100 35,702 294 0.83 3,039 350.89 0.0166
2020-05-21 2020-03-31 13F FASTLY CL A 31188V100 35,408 35,408 674 0.0044
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
(%)
2021-11-12 2021-09-30 13F FASTLY CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-06 2021-06-30 13F FASTLY CL A Call 2,600 48 n/a n/a n/a
2021-02-10 2020-12-31 13F FASTLY CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-11-13 2020-09-30 13F FASTLY CL A Call 200 3 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
(%)
2024-05-06 2024-03-31 13F FASTLY CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-02-12 2023-12-31 13F FASTLY CL A Put 10,000 9,900.00 79 -17.02 n/a n/a n/a
2023-11-08 2023-09-30 13F FASTLY CL A Put 100 0.00 95 38.24 n/a n/a n/a
2023-08-14 2023-06-30 13F FASTLY CL A Put 100 68 n/a n/a n/a
2021-08-06 2021-06-30 13F FASTLY CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-10 2021-03-31 13F FASTLY CL A Put 20 61 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.