Cloudflare, Inc.
MX ˙ BMV ˙ US18915M1071
SecurityMX:NET / Cloudflare, Inc.
InstitutionJane Street Group, Llc
Latest Disclosed Ownership1,596,439 shares
Latest Disclosed Value $ 329,409,223
Jane Street Group, Llc ownership in NET / Cloudflare, Inc.

On May 12, 2026 - Jane Street Group, Llc filed a 13F-HR form disclosing ownership of 1,596,439 shares of Cloudflare, Inc. (MX:NET) valued at $329,409,223 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 515,140 shares of Cloudflare, Inc.. This represents a change in shares of 209.90% during the quarter.

Jane Street Group, Llc has a history of taking positions in derivatives of the underlying security (NET) in the form of stock options. The firm currently holds call options representing 2,239,000 of underlying shares valued at $461,995,260 USD and put options representing 997,700 of underlying shares valued at $205,865,418 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:NET / Cloudflare, 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)
2026-05-12 2026-03-31 13F CLOUDFLARE CL A COM 18915M107 1,596,439 1,081,299 209.90 329,409 224.35 0.0424
2026-02-12 2025-12-31 13F CLOUDFLARE CL A COM 18915M107 515,140 417,356 426.81 101,560 384.01 0.0153
2025-11-14 2025-09-30 13F CLOUDFLARE CL A COM 18915M107 97,784 -42,978 -30.53 20,983 -23.88 0.0032
2025-08-14 2025-06-30 13F CLOUDFLARE CL A COM 18915M107 140,762 -508,895 -78.33 27,565 -62.35 0.0055
2025-05-19 2025-03-31 13F/A-1 CLOUDFLARE CL A COM 18915M107 649,657 626,040 2,650.80 73,210 2,778.84 0.0184
2025-05-14 2025-03-31 13F CLOUDFLARE CL A COM 18915M107 649,657 626,040 73,210 0.0153
2025-02-14 2024-12-31 13F CLOUDFLARE CL A COM 18915M107 23,617 -71,323 -75.12 2,543 -66.88 0.0006
2024-11-15 2024-09-30 13F CLOUDFLARE CL A COM 18915M107 94,940 -66,148 -41.06 7,680 -42.44 0.0017
2024-08-15 2024-06-30 13F CLOUDFLARE CL A COM 18915M107 161,088 34,878 27.63 13,343 9.18 0.0030
2024-05-16 2024-03-31 13F CLOUDFLARE CL A COM 18915M107 126,210 -54,678 -30.23 12,221 -18.86 0.0026
2024-02-15 2023-12-31 13F CLOUDFLARE CL A COM 18915M107 180,888 -32,546 -15.25 15,061 11.94 0.0039
2023-11-15 2023-09-30 13F CLOUDFLARE CL A COM 18915M107 213,434 52,770 32.84 13,455 28.11 0.0043
2023-08-14 2023-06-30 13F CLOUDFLARE CL A COM 18915M107 160,664 35,707 28.58 10,503 36.32 0.0035
2023-05-16 2023-03-31 13F CLOUDFLARE CL A COM 18915M107 124,957 -150,350 -54.61 7,705 -38.10 0.0032
2023-02-15 2022-12-31 13F CLOUDFLARE CL A COM 18915M107 275,307 -789,560 -74.15 12,447 -78.87 0.0058
2022-11-15 2022-09-30 13F CLOUDFLARE CL A COM 18915M107 1,064,867 860,872 422.01 58,897 559.91 0.0258
2022-08-16 2022-06-30 13F CLOUDFLARE CL A COM 18915M107 203,995 -135,304 -39.88 8,925 -78.02 0.0038
2022-05-17 2022-03-31 13F CLOUDFLARE CL A COM 18915M107 339,299 153,515 82.63 40,614 66.24 0.0131
2022-02-15 2021-12-31 13F CLOUDFLARE CL A COM 18915M107 185,784 147,043 379.55 24,431 459.83 0.0081
2021-11-16 2021-09-30 13F CLOUDFLARE CL A COM 18915M107 38,741 31,759 454.87 4,364 490.53 0.0015
2021-08-16 2021-06-30 13F CLOUDFLARE CL A COM 18915M107 6,982 -124,365 -94.68 739 -91.99 0.0003
2021-05-18 2021-03-31 13F CLOUDFLARE CL A COM 18915M107 131,347 -283,310 -68.32 9,228 -70.71 0.0046
2021-02-17 2020-12-31 13F CLOUDFLARE CL A COM 18915M107 414,657 -8,331 -1.97 31,510 81.43 0.0158
2020-11-17 2020-09-30 13F CLOUDFLARE CL A COM 18915M107 422,988 186,217 78.65 17,368 104.04 0.0104
2020-08-17 2020-06-30 13F CLOUDFLARE CL A COM 18915M107 236,771 61,417 35.02 8,512 106.75 0.0064
2020-05-15 2020-03-31 13F CLOUDFLARE CL A COM 18915M107 175,354 175,354 4,117 0.0040
2020-02-14 2019-12-31 13F CLOUDFLARE CL A COM 18915M107 0 -125,990 -100.00 0 -100.00
2019-11-14 2019-09-30 13F CLOUDFLARE CL A COM 18915M107 125,990 125,990 2,340 0.0039
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
(%)
2026-05-12 2026-03-31 13F CLOUDFLARE CL A COM Call 2,239,000 20.23 461,995 25.84 n/a n/a n/a
2026-02-12 2025-12-31 13F CLOUDFLARE CL A COM Call 1,862,200 2.07 367,133 -6.22 n/a n/a n/a
2025-11-14 2025-09-30 13F CLOUDFLARE CL A COM Call 1,824,400 9.19 391,498 19.65 n/a n/a n/a
2025-08-14 2025-06-30 13F CLOUDFLARE CL A COM Call 1,670,800 231.44 327,193 475.97 n/a n/a n/a
2025-05-19 2025-03-31 13F/A CLOUDFLARE CL A COM Call 504,100 15.75 56,807 21.14 n/a n/a n/a
2025-05-14 2025-03-31 13F CLOUDFLARE CL A COM Call 504,100 56,807 n/a n/a n/a
2025-02-14 2024-12-31 13F CLOUDFLARE CL A COM Call 435,500 -1.60 46,895 30.99 n/a n/a n/a
2024-11-15 2024-09-30 13F CLOUDFLARE CL A COM Call 442,600 35,802 n/a n/a n/a
2022-08-16 2022-06-30 13F CLOUDFLARE COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-17 2022-03-31 13F CLOUDFLARE COM Call 806,200 -43.64 96,502 -48.70 n/a n/a n/a
2022-02-15 2021-12-31 13F CLOUDFLARE COM Call 1,430,500 38.75 188,111 61.97 n/a n/a n/a
2021-11-16 2021-09-30 13F CLOUDFLARE COM Call 1,031,000 10.47 116,142 17.58 n/a n/a n/a
2021-08-16 2021-06-30 13F CLOUDFLARE COM Call 933,300 40.90 98,780 112.25 n/a n/a n/a
2021-05-18 2021-03-31 13F CLOUDFLARE COM Call 662,400 -40.76 46,540 -45.23 n/a n/a n/a
2021-02-17 2020-12-31 13F CLOUDFLARE COM Call 1,118,200 65.91 84,972 207.05 n/a n/a n/a
2020-11-17 2020-09-30 13F CLOUDFLARE COM Call 674,000 -12.66 27,674 -0.25 n/a n/a n/a
2020-08-17 2020-06-30 13F CLOUDFLARE COM Call 771,700 1,750.60 27,743 2,733.81 n/a n/a n/a
2020-05-15 2020-03-31 13F CLOUDFLARE COM Call 41,700 979 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
(%)
2026-05-12 2026-03-31 13F CLOUDFLARE CL A COM Put 997,700 135.97 205,865 146.97 n/a n/a n/a
2026-02-12 2025-12-31 13F CLOUDFLARE CL A COM Put 422,800 -0.98 83,355 -9.03 n/a n/a n/a
2025-11-14 2025-09-30 13F CLOUDFLARE CL A COM Put 427,000 80.70 91,630 98.01 n/a n/a n/a
2025-08-14 2025-06-30 13F CLOUDFLARE CL A COM Put 236,300 -27.76 46,275 25.54 n/a n/a n/a
2025-05-19 2025-03-31 13F/A CLOUDFLARE CL A COM Put 327,100 -81.73 36,861 -80.88 n/a n/a n/a
2025-05-14 2025-03-31 13F CLOUDFLARE CL A COM Put 327,100 36,861 n/a n/a n/a
2025-02-14 2024-12-31 13F CLOUDFLARE CL A COM Put 1,790,200 78.56 192,769 137.69 n/a n/a n/a
2024-11-15 2024-09-30 13F CLOUDFLARE CL A COM Put 1,002,600 17.00 81,100 14.26 n/a n/a n/a
2024-08-15 2024-06-30 13F CLOUDFLARE COM Put 856,900 -1.88 70,977 -16.06 n/a n/a n/a
2024-05-16 2024-03-31 13F CLOUDFLARE COM Put 873,300 -32.12 84,562 -21.06 n/a n/a n/a
2024-02-15 2023-12-31 13F CLOUDFLARE COM Put 1,286,600 15.25 107,122 52.21 n/a n/a n/a
2023-11-15 2023-09-30 13F CLOUDFLARE COM Put 1,116,400 -4.25 70,378 -7.66 n/a n/a n/a
2023-08-14 2023-06-30 13F CLOUDFLARE COM Put 1,165,900 48.54 76,215 57.48 n/a n/a n/a
2023-05-16 2023-03-31 13F CLOUDFLARE COM Put 784,900 238.90 48,397 362.23 n/a n/a n/a
2023-02-15 2022-12-31 13F CLOUDFLARE COM Put 231,600 -35.99 10,471 -47.68 n/a n/a n/a
2022-11-15 2022-09-30 13F CLOUDFLARE COM Put 361,800 -1.50 20,011 24.53 n/a n/a n/a
2022-08-16 2022-06-30 13F CLOUDFLARE COM Put 367,300 -35.61 16,069 -76.46 n/a n/a n/a
2022-05-17 2022-03-31 13F CLOUDFLARE COM Put 570,400 -21.30 68,277 -28.36 n/a n/a n/a
2022-02-15 2021-12-31 13F CLOUDFLARE COM Put 724,800 29.89 95,311 51.63 n/a n/a n/a
2021-11-16 2021-09-30 13F CLOUDFLARE COM Put 558,000 56.83 62,859 66.92 n/a n/a n/a
2021-08-16 2021-06-30 13F CLOUDFLARE COM Put 355,800 -6.69 37,658 40.57 n/a n/a n/a
2021-05-18 2021-03-31 13F CLOUDFLARE COM Put 381,300 -22.36 26,790 -28.21 n/a n/a n/a
2021-02-17 2020-12-31 13F CLOUDFLARE COM Put 491,100 -4.04 37,319 77.58 n/a n/a n/a
2020-11-17 2020-09-30 13F CLOUDFLARE COM Put 511,800 118.91 21,015 150.03 n/a n/a n/a
2020-08-17 2020-06-30 13F CLOUDFLARE COM Put 233,800 579.65 8,405 940.22 n/a n/a n/a
2020-05-15 2020-03-31 13F CLOUDFLARE COM Put 34,400 808 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.