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BAND in the 13F filings

Bandwidth Inc · CUSIP 05988J103

Sector · Software and IT servicesTheme · Cloud and enterprise software· L3VLUP-definedTheme · Prepackaged software
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
15 May 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
20
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 1 listed it in both
Shares listed
5,337,325
combined, among listed positions
Reported value
$95m
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 16 buyers (opened or added shares) and 5 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,323,428.

Managers listing BAND in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

20 of 20 holders

ActionFiling
Acadian Asset Management LLC832,688$15munder 0.1%Added+23,68313 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP688,430$12munder 0.1%Added+516,11714 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC644,981$11munder 0.1%Added+26,08114 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)524,088$9.3munder 0.1%Trimmed-21,49715 May 2026 (the filing on sec.gov)
Two Sigma Investments LP493,932$8.8munder 0.1%Added+253,04215 May 2026 (the filing on sec.gov)
AQR Capital Management LLC443,592$7.9munder 0.1%Added+16,11815 May 2026 (the filing on sec.gov)
Wellington Management Group LLP381,711$6.8munder 0.1%Trimmed-55,41415 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.349,860$6.2munder 0.1%Trimmed-37,04815 May 2026 (the filing on sec.gov)
Citadel Advisors LLC220,849$3.9munder 0.1%Added+190,56115 May 2026 (the filing on sec.gov)
AllianceBernstein LP214,692$3.3munder 0.1%Added+100,08215 May 2026 (the filing on sec.gov)
Man Group PLC102,228$1.8munder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Jane Street Group LLC89,847$1.6munder 0.1%Added+69,82512 May 2026 (the filing on sec.gov)
Invesco Ltd68,078$1.2munder 0.1%Added+1,09012 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP60,242$1.1munder 0.1%Trimmed-32,58915 May 2026 (the filing on sec.gov)
Walleye Capital LLC59,997$1.1munder 0.1%Newnew13 May 2026 (the filing on sec.gov)
Squarepoint Ops LLC45,266$807kunder 0.1%Added+34,00415 May 2026 (the filing on sec.gov)
Winton Group Ltd41,944$747kunder 0.1%Newnew12 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc37,051$661kunder 0.1%Added+7,15515 May 2026 (the filing on sec.gov)
Millennium Management LLC27,822$496kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC10,027$179kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (5)

Exited (1)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
3 in Q3 2024 to 4 in Q2 2026

Tracked managers listing it, at least.

035810201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
BAND by quarter
QuarterHoldersReported valueBuyersSellers
Q4 20171$12mn.a.n.a.
Q1 20181$18mn.a.n.a.
Q2 20182$24mn.a.n.a.
Q3 20185$34mn.a.n.a.
Q4 20185$36mn.a.n.a.
Q1 20195$76mn.a.n.a.
Q2 20196$148mn.a.n.a.
Q3 20194$142mn.a.n.a.
Q4 20195$176mn.a.n.a.
Q1 202010$324mn.a.n.a.
Q2 20208$470mn.a.n.a.
Q3 20209$531mn.a.n.a.
Q4 20208$491mn.a.n.a.
Q1 202110$297mn.a.n.a.
Q2 20219$305mn.a.n.a.
Q3 202110$294mn.a.n.a.
Q4 20218$269mn.a.n.a.
Q1 20228$114mn.a.n.a.
Q2 20223$35mn.a.n.a.
Q3 20223$20mn.a.n.a.
Q4 20222$27mn.a.n.a.
Q1 20232$5.0mn.a.n.a.
Q2 20232$6.1mn.a.n.a.
Q3 20232$4.8mn.a.n.a.
Q4 20232$4.7m02
Q1 20242$6.6m11
Q2 20242$11m20
Q3 20243$16m21
Q4 20243$15m03
Q1 20251$10.0m02
Q2 20251$12m01
Q3 20251$13m10
Q4 20251$12m119
Q1 20261$15m165
Q2 20264$92m2110

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

BAND and GOOGL →BAND and AMZN →BAND and MSFT →Choose a stock to compare with BAND →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own BAND, latest filings →Back to the 13F Explorer →