Fiserv, Inc.
US ˙ NYSE ˙ US3377381088
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT

SecurityFI / Fiserv, Inc.
InstitutionParallax Volatility Advisers, L.P.
Latest Disclosed Ownership4,226 shares
Latest Disclosed Value $ 267,337
Parallax Volatility Advisers, L.P. ownership in FI / Fiserv, Inc.

On May 15, 2026 - Parallax Volatility Advisers, L.P. filed a 13F-HR form disclosing ownership of 4,226 shares of Fiserv, Inc. (US:FI) valued at $267,337 USD as of March 31, 2026. The current value of the position is $269,619 USD.

Parallax Volatility Advisers, L.P. has a history of taking positions in derivatives of the underlying security (FI) 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
(Premium Subscription Required)

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.

FI / Fiserv, 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 FISERV COM 337738108 4,226 4,226 267 0.0007
2025-08-14 2025-06-30 13F FISERV COM 337738108 0 -2,117 -100.00 0 -100.00
2025-05-15 2025-03-31 13F FISERV COM 337738108 2,117 1,464 224.20 467 248.51 0.0013
2025-02-14 2024-12-31 13F FISERV COM 337738108 653 -4,723 -87.85 134 -86.11 0.0003
2024-11-14 2024-09-30 13F FISERV COM 337738108 5,376 368 7.35 966 29.36 0.0018
2024-08-14 2024-06-30 13F FISERV COM 337738108 5,008 -18,127 -78.35 746 -79.82 0.0016
2024-05-15 2024-03-31 13F FISERV COM 337738108 23,135 -9,227 -28.51 3,697 -13.98 0.0083
2024-02-14 2023-12-31 13F FISERV COM 337738108 32,362 4,477 16.06 4,299 36.49 0.0088
2023-11-14 2023-09-30 13F FISERV COM 337738108 27,885 -27,108 -49.29 3,150 -54.61 0.0070
2023-08-14 2023-06-30 13F FISERV COM 337738108 54,993 54,903 61,003.33 6,937 69,270.00 0.0151
2023-05-15 2023-03-31 13F FISERV COM 337738108 90 -30 -25.00 10 -16.67 0.0000
2023-02-27 2022-12-31 13F/A-1 FISERV COM 337738108 120 -25,791 -99.54 12 -99.50 0.0000
2023-02-14 2022-12-31 13F FISERV COM 337738108 120 -25,791 12 0.0000
2022-11-21 2022-09-30 13F/A-1 FISERV COM 337738108 25,911 -12,858 -33.17 2,424 -29.72 0.0037
2022-11-14 2022-09-30 13F FISERV COM 337738108 25,911 -12,858 2,424 0.0038
2022-08-17 2022-06-30 13F/A-1 FISERV COM 337738108 38,769 -29,661 -43.35 3,449 -50.30 0.0033
2022-08-15 2022-06-30 13F FISERV COM 337738108 38,769 -29,661 3,449 0.0041
2022-05-16 2022-03-31 13F FISERV COM 337738108 68,430 -25,241 -26.95 6,939 -28.63 0.0036
2022-02-14 2021-12-31 13F/A-1 FISERV COM 337738108 93,671 9,217 10.91 9,722 6.10 0.0247
2021-11-15 2021-09-30 13F/A-1 FISERV COM 337738108 84,454 31,342 59.01 9,163 61.41 0.0185
2021-08-16 2021-06-30 13F FISERV COM 337738108 53,112 5,125 10.68 5,677 -0.61 0.0140
2021-05-14 2021-03-31 13F/A-1 FISERV COM 337738108 47,987 -191,885 -79.99 5,712 -79.09 0.0122
2021-02-16 2020-12-31 13F/A-1 FISERV COM 337738108 239,872 -114,619 -32.33 27,312 -25.23 0.0505
2020-11-13 2020-09-30 13F FISERV COM 337738108 354,491 228,905 182.27 36,530 197.96 0.0271
2020-08-14 2020-06-30 13F FISERV COM 337738108 125,586 106,552 559.80 12,260 578.10 0.0143
2020-05-15 2020-03-31 13F FISERV COM 337738108 19,034 -14,793 -43.73 1,808 -53.77 0.0023
2020-02-14 2019-12-31 13F FISERV COM 337738108 33,827 29,286 644.92 3,911 732.13 0.0045
2019-11-14 2019-09-30 13F FISERV FISERV INC 337738108 4,541 4,481 7,468.33 470 9,300.00 0.0005
2019-08-14 2019-06-30 13F FISERV COM 337738108 60 -3,262 -98.19 5 -98.29 0.0000
2019-05-15 2019-03-31 13F FISERV COM 337738108 3,322 -1,786 -34.96 293 -56.27 0.0003
2018-02-14 2017-12-31 13F FRANKS INTL N V COM N33462107 7,560 7,515 16,700.00 50 733.33 0.0001
2018-02-14 2017-12-31 13F FISERV COM 337738108 5,108 5,063 11,251.11 670 11,066.67 0.0009
2017-11-14 2017-09-30 13F FISERV COM 337738108 45 -1,101 -96.07 6 -95.08 0.0000
2017-02-14 2016-12-31 13F FISERV COM 337738108 1,146 -2,460 -68.22 122 -68.88 0.0002
2016-08-15 2016-06-30 13F FISERV COM 337738108 3,606 -18,792 -83.90 392 -82.94 0.0008
2016-05-16 2016-03-31 13F FISERV COM 337738108 22,398 16,185 260.50 2,298 304.58 0.0050
2016-02-16 2015-12-31 13F FISERV COM 337738108 6,213 4,430 248.46 568 268.83 0.0012
2015-11-16 2015-09-30 13F FISERV COM 337738108 1,783 -4,088 -69.63 154 -68.31 0.0003
2015-08-14 2015-06-30 13F FRANKS INTL N V COM N33462107 927 -1,619 -63.59 17 -64.58 0.0000
2015-08-14 2015-06-30 13F FISERV COM 337738108 5,871 2,888 96.82 486 105.06 0.0010
2015-05-15 2015-03-31 13F FRANKS INTL N V COM N33462107 2,546 -3,675 -59.07 48 -53.40 0.0001
2015-05-15 2015-03-31 13F FISERV COM 337738108 2,983 -2,038 -40.59 237 -33.43 0.0006
2015-02-17 2014-12-31 13F FRANKS INTL N V COM N33462107 6,221 2,820 82.92 103 60.94 0.0003
2015-02-17 2014-12-31 13F FISERV COM 337738108 5,021 -320 -5.99 356 3.19 0.0010
2014-11-26 2014-09-30 13F/A-1 FRANKS INTL N V COM N33462107 3,401 3,146 1,233.73 64 966.67 0.0002
2014-11-26 2014-09-30 13F/A-1 FISERV COM 337738108 5,341 4,745 796.14 345 858.33 0.0011
2014-11-14 2014-09-30 13F FISERV COM 337738108 5,341 345
2014-08-14 2014-06-30 13F FRANKS INTL N V COM N33462107 255 208 442.55 6 100.00 0.0000
2014-08-14 2014-06-30 13F FISERV COM 337738108 596 549 1,168.09 36 1,100.00 0.0001
2014-05-15 2014-03-31 13F FISERV COM 337738108 47 -9,070 -99.48 3 -99.44 0.0000
2014-02-28 2013-12-31 13F/A-1 FISERV COM 337738108 9,117 7,048 340.65 538 157.42 0.0026
2014-02-14 2013-12-31 13F FISERV COM 337738108 9,117 538
2013-11-14 2013-09-30 13F FISERV COM 337738108 2,069 367 21.56 209 40.27 0.0011
2013-08-14 2013-06-30 13F FISERV COM 337738108 1,702 1,702 149 0.0007
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
(%)
2025-05-15 2025-03-31 13F FISERV COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-14 2024-12-31 13F FISERV COM Call 45,100 7,416.67 9,264 8,557.94 n/a n/a n/a
2024-11-14 2024-09-30 13F FISERV COM Call 600 0.00 108 20.22 n/a n/a n/a
2024-08-14 2024-06-30 13F FISERV COM Call 600 500.00 89 493.33 n/a n/a n/a
2024-05-15 2024-03-31 13F FISERV COM Call 100 -99.58 16 -99.52 n/a n/a n/a
2024-02-14 2023-12-31 13F FISERV COM Call 23,600 198.73 3,135 251.46 n/a n/a n/a
2023-11-14 2023-09-30 13F FISERV COM Call 7,900 -25.47 892 -33.28 n/a n/a n/a
2023-08-14 2023-06-30 13F FISERV COM Call 10,600 -92.72 1,337 -91.88 n/a n/a n/a
2023-05-15 2023-03-31 13F FISERV COM Call 145,700 8.33 16,468 21.15 n/a n/a n/a
2023-02-27 2022-12-31 13F/A FISERV COM Call 134,500 -43.34 13,594 -38.80 n/a n/a n/a
2023-02-14 2022-12-31 13F FISERV COM Call 134,500 13,594 n/a n/a n/a
2022-11-21 2022-09-30 13F/A FISERV COM Call 237,400 74.30 22,209 83.21 n/a n/a n/a
2022-11-14 2022-09-30 13F FISERV COM Call 237,400 22,209 n/a n/a n/a
2022-08-17 2022-06-30 13F/A FISERV COM Call 136,200 125.50 12,122 97.91 n/a n/a n/a
2022-08-15 2022-06-30 13F FISERV COM Call 136,200 12,122 n/a n/a n/a
2022-05-16 2022-03-31 13F FISERV COM Call 60,400 166.08 6,125 160.08 n/a n/a n/a
2022-02-14 2021-12-31 13F/A FISERV COM Call 22,700 -69.49 2,355 -70.83 n/a n/a n/a
2021-11-15 2021-09-30 13F/A FISERV COM Call 74,400 -25.45 8,072 -24.33 n/a n/a n/a
2021-08-16 2021-06-30 13F FISERV COM Call 99,800 4,239.13 10,667 3,793.07 n/a n/a n/a
2021-05-14 2021-03-31 13F/A FISERV COM Call 2,300 -99.62 274 -99.60 n/a n/a n/a
2021-02-16 2020-12-31 13F/A FISERV COM Call 605,000 125.49 68,884 149.13 n/a n/a n/a
2020-11-13 2020-09-30 13F FISERV COM Call 268,300 379.96 27,650 406.69 n/a n/a n/a
2020-08-14 2020-06-30 13F FISERV COM Call 55,900 -63.08 5,457 -62.04 n/a n/a n/a
2020-05-15 2020-03-31 13F FISERV COM Call 151,400 25,133.33 14,377 20,438.57 n/a n/a n/a
2020-02-14 2019-12-31 13F FISERV COM Call 600 -54.55 70 -48.53 n/a n/a n/a
2019-11-14 2019-09-30 13F FISERV FISERV INC Call 1,320 -99.47 136 -99.41 n/a n/a n/a
2019-08-14 2019-06-30 13F FISERV COM Call 251,320 22,910 n/a n/a n/a
2017-11-14 2017-09-30 13F FISERV COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-08-14 2017-06-30 13F FISERV COM Call 2,000 -35.48 245 -31.56 n/a n/a n/a
2017-05-15 2017-03-31 13F FISERV COM Call 3,100 181.82 358 205.98 n/a n/a n/a
2017-02-14 2016-12-31 13F FISERV COM Call 1,100 117 n/a n/a n/a
2016-11-14 2016-09-30 13F FISERV COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-08-15 2016-06-30 13F FISERV COM Call 2,000 0.00 217 5.85 n/a n/a n/a
2016-05-16 2016-03-31 13F FISERV COM Call 2,000 53.85 205 72.27 n/a n/a n/a
2016-02-16 2015-12-31 13F FISERV COM Call 1,300 -38.10 119 -28.74 n/a n/a n/a
2015-11-16 2015-09-30 13F FRANKS INTL N V COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-08-14 2015-06-30 13F FRANKS INTL N V COM Call 700 -66.67 13 -92.22 n/a n/a n/a
2015-05-15 2015-03-31 13F FISERV COM Call 2,100 -16.00 167 -6.18 n/a n/a n/a
2015-05-15 2015-03-31 13F FRANKS INTL N V COM Call 1,700 32 n/a n/a n/a
2015-02-17 2014-12-31 13F FISERV COM Call 2,500 400.00 178 493.33 n/a n/a n/a
2015-02-17 2014-12-31 13F FRANKS INTL N V COM Call 3,700 62 n/a n/a n/a
2014-11-26 2014-09-30 13F/A FRANKS INTL N V COM Call 3,800 660.00 71 136.67 n/a n/a n/a
2014-08-14 2014-06-30 13F FISERV COM Call 500 -28.57 30 -23.08 n/a n/a n/a
2014-05-15 2014-03-31 13F FISERV COM Call 700 -50.00 39 -52.44 n/a n/a n/a
2014-02-28 2013-12-31 13F/A FISERV COM Call 1,400 82 n/a n/a n/a
2014-02-14 2013-12-31 13F FISERV COM Call 1,400 82 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
(%)
2025-08-14 2025-06-30 13F FISERV COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F FISERV COM Put 2,100 -75.58 464 -73.78 n/a n/a n/a
2025-02-14 2024-12-31 13F FISERV COM Put 8,600 -7.53 1,767 5.75 n/a n/a n/a
2024-11-14 2024-09-30 13F FISERV COM Put 9,300 -4.12 1,671 15.57 n/a n/a n/a
2024-08-14 2024-06-30 13F FISERV COM Put 9,700 14.12 1,446 6.41 n/a n/a n/a
2024-05-15 2024-03-31 13F FISERV COM Put 8,500 -93.64 1,358 -92.35 n/a n/a n/a
2024-02-14 2023-12-31 13F FISERV COM Put 133,600 1.67 17,747 19.57 n/a n/a n/a
2023-11-14 2023-09-30 13F FISERV COM Put 131,400 -17.62 14,843 -26.23 n/a n/a n/a
2023-08-14 2023-06-30 13F FISERV COM Put 159,500 16.76 20,121 30.32 n/a n/a n/a
2023-05-15 2023-03-31 13F FISERV COM Put 136,600 0.22 15,440 12.08 n/a n/a n/a
2023-02-27 2022-12-31 13F/A FISERV COM Put 136,300 -42.20 13,776 -37.57 n/a n/a n/a
2023-02-14 2022-12-31 13F FISERV COM Put 136,300 13,776 n/a n/a n/a
2022-11-21 2022-09-30 13F/A FISERV COM Put 235,800 65.01 22,063 73.55 n/a n/a n/a
2022-11-14 2022-09-30 13F FISERV COM Put 235,800 22,063 n/a n/a n/a
2022-08-17 2022-06-30 13F/A FISERV COM Put 142,900 89.52 12,713 66.27 n/a n/a n/a
2022-08-15 2022-06-30 13F FISERV COM Put 142,900 12,713 n/a n/a n/a
2022-05-16 2022-03-31 13F FISERV COM Put 75,400 -17.05 7,646 -18.94 n/a n/a n/a
2022-02-14 2021-12-31 13F/A FISERV COM Put 90,900 -46.72 9,433 -49.05 n/a n/a n/a
2021-11-15 2021-09-30 13F/A FISERV COM Put 170,600 282.51 18,513 288.11 n/a n/a n/a
2021-08-16 2021-06-30 13F FISERV COM Put 44,600 227.94 4,770 194.26 n/a n/a n/a
2021-05-14 2021-03-31 13F/A FISERV COM Put 13,600 -95.02 1,621 -94.79 n/a n/a n/a
2021-02-16 2020-12-31 13F/A FISERV COM Put 273,200 -48.92 31,108 -43.55 n/a n/a n/a
2020-11-13 2020-09-30 13F FISERV COM Put 534,800 141.99 55,108 155.44 n/a n/a n/a
2020-08-14 2020-06-30 13F FISERV COM Put 221,000 97.32 21,574 102.86 n/a n/a n/a
2020-05-15 2020-03-31 13F FISERV COM Put 112,000 111.40 10,635 73.55 n/a n/a n/a
2020-02-14 2019-12-31 13F FISERV COM Put 52,980 100.83 6,128 124.39 n/a n/a n/a
2019-11-14 2019-09-30 13F FISERV FISERV INC Put 26,380 1,232.32 2,731 1,408.84 n/a n/a n/a
2019-08-14 2019-06-30 13F FISERV COM Put 1,980 -95.05 181 -94.87 n/a n/a n/a
2019-05-15 2019-03-31 13F FISERV COM Put 40,000 3,531 n/a n/a n/a
2017-08-14 2017-06-30 13F FISERV COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-05-15 2017-03-31 13F FISERV COM Put 2,000 -50.00 231 -45.77 n/a n/a n/a
2017-02-14 2016-12-31 13F FISERV COM Put 4,000 100.00 426 114.07 n/a n/a n/a
2016-11-14 2016-09-30 13F FISERV COM Put 2,000 -88.89 199 -89.83 n/a n/a n/a
2016-08-15 2016-06-30 13F FISERV COM Put 18,000 -43.40 1,957 -40.01 n/a n/a n/a
2016-05-16 2016-03-31 13F FISERV COM Put 31,800 404.76 3,262 465.34 n/a n/a n/a
2016-02-16 2015-12-31 13F FISERV COM Put 6,300 162.50 577 177.40 n/a n/a n/a
2015-11-16 2015-09-30 13F FISERV COM Put 2,400 140.00 208 160.00 n/a n/a n/a
2015-08-14 2015-06-30 13F FRANKS INTL N V COM Put 3,200 0.00 60 0.00 n/a n/a n/a
2015-05-15 2015-03-31 13F FRANKS INTL N V COM Put 3,200 -38.46 60 -30.23 n/a n/a n/a
2015-05-15 2015-03-31 13F FISERV COM Put 1,000 -78.26 80 -75.46 n/a n/a n/a
2015-02-17 2014-12-31 13F FRANKS INTL N V COM Put 5,200 4.00 86 -73.37 n/a n/a n/a
2015-02-17 2014-12-31 13F FISERV COM Put 4,600 -8.00 326 0.93 n/a n/a n/a
2014-11-26 2014-09-30 13F/A FISERV COM Put 5,000 72.41 323 84.57 n/a n/a n/a
2014-11-26 2014-09-30 13F/A FRANKS INTL N V COM Put 2,900 54 n/a n/a n/a
2014-11-14 2014-09-30 13F FISERV COM Put 5,000 323 n/a n/a n/a
2014-08-14 2014-06-30 13F FRANKS INTL N V COM Put 900 -76.92 22 -90.05 n/a n/a n/a
2014-08-14 2014-06-30 13F FISERV COM Put 2,900 -25.64 175 -20.81 n/a n/a n/a
2014-05-15 2014-03-31 13F FISERV COM Put 3,900 -75.62 221 -76.61 n/a n/a n/a
2014-02-28 2013-12-31 13F/A FISERV COM Put 16,000 945 n/a n/a n/a
2014-02-14 2013-12-31 13F FISERV COM Put 16,000 945 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.