Bandwidth Inc.
US ˙ NasdaqGS ˙ US05988J1034

SecurityBAND / Bandwidth Inc.
InstitutionWolverine Trading, Llc
Latest Disclosed Ownership11,236 shares
Latest Disclosed Value $ 196,068
Wolverine Trading, Llc ownership in BAND / Bandwidth Inc.

On November 14, 2025 - Wolverine Trading, Llc filed a 13F-HR form disclosing ownership of 11,236 shares of Bandwidth Inc. (US:BAND) valued at $187,304 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 18, 2025 disclosing 10,629 shares of Bandwidth Inc.. This represents a change in shares of 5.71% during the quarter. The current value of the position is $737,082 USD.

Wolverine Trading, Llc has a history of taking positions in derivatives of the underlying security (BAND) 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.

BAND / Bandwidth 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)
2025-11-14 2025-09-30 13F BANDWIDTH COM CL A 05988J103 11,236 607 5.71 196 20.99 0.0001
2025-08-18 2025-06-30 13F BANDWIDTH COM CL A 05988J103 10,629 10,629 162 0.0002
2022-08-15 2022-06-30 13F BANDWIDTH COM CL A 05988J103 0 -45,858 -100.00 0 -100.00
2022-05-16 2022-03-31 13F BANDWIDTH COM CL A 05988J103 45,858 30,709 202.71 1,524 38.04 0.0020
2022-02-14 2021-12-31 13F BANDWIDTH COM CL A 05988J103 15,149 15,149 1,104 0.0013
2021-08-06 2021-06-30 13F BANDWIDTH COM CL A 05988J103 0 -6,202 -100.00 0 -100.00
2021-05-14 2021-03-31 13F BANDWIDTH COM CL A 05988J103 6,202 -2,506 -28.78 758 -45.66 0.0011
2021-02-12 2020-12-31 13F BANDWIDTH COM CL A 05988J103 8,708 5,905 210.67 1,395 184.11 0.0022
2020-11-13 2020-09-30 13F BANDWIDTH COM CL A 05988J103 2,803 2,803 491 0.0012
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
(%)
2023-08-23 2023-06-30 13F BANDWIDTH COM CL A Call 0 -100.00 0 n/a n/a n/a
2023-05-15 2023-03-31 13F BANDWIDTH COM CL A Call 25,600 57.06 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F BANDWIDTH COM CL A Call 16,300 374 n/a n/a n/a
2022-11-14 2022-09-30 13F BANDWIDTH COM CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-15 2022-06-30 13F BANDWIDTH COM CL A Call 85,900 -12.44 1,758 -46.09 n/a n/a n/a
2022-05-16 2022-03-31 13F BANDWIDTH COM CL A Call 98,100 315.68 3,261 89.59 n/a n/a n/a
2022-02-14 2021-12-31 13F BANDWIDTH COM CL A Call 23,600 1,720 n/a n/a n/a
2021-08-06 2021-06-30 13F BANDWIDTH COM CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-14 2021-03-31 13F BANDWIDTH COM CL A Call 19,400 27.63 2,372 -2.63 n/a n/a n/a
2021-02-12 2020-12-31 13F BANDWIDTH COM CL A Call 15,200 92.41 2,436 76.01 n/a n/a n/a
2020-11-13 2020-09-30 13F BANDWIDTH COM CL A Call 7,900 139.39 1,384 233.49 n/a n/a n/a
2020-08-13 2020-06-30 13F BANDWIDTH COM CL A Call 3,300 415 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
(%)
2022-08-15 2022-06-30 13F BANDWIDTH COM CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-16 2022-03-31 13F BANDWIDTH COM CL A Put 32,600 36.97 1,084 -37.49 n/a n/a n/a
2022-02-14 2021-12-31 13F BANDWIDTH COM CL A Put 23,800 1,734 n/a n/a n/a
2021-08-06 2021-06-30 13F BANDWIDTH COM CL A Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-14 2021-03-31 13F BANDWIDTH COM CL A Put 12,600 7.69 1,541 -17.81 n/a n/a n/a
2021-02-12 2020-12-31 13F BANDWIDTH COM CL A Put 11,700 120.75 1,875 102.05 n/a n/a n/a
2020-11-13 2020-09-30 13F BANDWIDTH COM CL A Put 5,300 928 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.