Bandwidth Inc.: which funds bought and sold

Institutions that bought and sold Bandwidth shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 172 institutions that filed 13F reports for both quarters added to or opened positions in Bandwidth, and 72 cut or closed them. Together they added a net 6.8M shares, +28.4% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 4.0M shares (+63.3%); index fund managers were net buyers of 84K shares (+1.2%). 108 opened a new position and 21 sold out entirely.

Bought, Q2 2026 172 institutions, 108 of them new holders Sold, Q2 2026 72 institutions, 21 of them sold out

Net change, all compared +6.8M shares (+28.4%)

Net change, active managers +4.0M shares (+63.3%), 39 bought, 16 sold

Buyers versus sellers

institutions compared, 261

172 bought 17 72 sold

Active managers and hedge funds 39 bought · 16 sold · +4.0M

Index fund managers 10 bought · 1 sold · +84K

Other institutions 123 bought · 55 sold · +2.7M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Hood River Capital Management LLC	+2.3M New position	2.3M	$145M
Driehaus Capital Management LLC Active manager	+1.4M New position	1.4M	$87.9M
D. E. Shaw & Co., Inc. Hedge fund	+961K +274.7%	1.3M	$83M
Jane Street Group, LLC	+631K +701.8%	720K	$45.6M
Wellington Management Group LLP Active manager	+530K +138.9%	912K	$57.7M
Portolan Capital Management, LLC	+413K New position	413K	$26.1M
G2 Investment Partners Management LLC	+367K New position	367K	$23.2M
Two Sigma Investments, LP Hedge fund	+331K +67.0%	825K	$52.2M
Jennison Associates LLC Active manager	+315K New position	315K	$20M
Nuveen, LLC	+299K +85.8%	649K	$41.1M
Sei Investments Co	+227K New position	227K	$14.4M
State Street Corp Index funds	+218K +30.1%	941K	$59.6M
Marshall Wace, LLP Hedge fund	+192K New position	192K	$12.2M
Point72 Asset Management, L.P. Hedge fund	+187K New position	187K	$11.9M
Citadel Advisors LLC Hedge fund	+162K +73.4%	383K	$24.2M
Citigroup Inc	+158K +3724.4%	162K	$10.2M
Pier Capital, LLC	+140K New position	140K	$8.9M
BNP Paribas Financial Markets	+117K +328.2%	153K	$9.7M
Vanguard Portfolio Management LLC Index funds	+116K +21.3%	660K	$41.7M
Universal- Beteiligungs- Und Servicegesellschaft Mbh	+114K New position	114K	$7.2M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Driehaus Capital Management LLC Active manager	+1.4M New position	1.4M	$87.9M
D. E. Shaw & Co., Inc. Hedge fund	+961K +274.7%	1.3M	$83M
Wellington Management Group LLP Active manager	+530K +138.9%	912K	$57.7M
Two Sigma Investments, LP Hedge fund	+331K +67.0%	825K	$52.2M
Jennison Associates LLC Active manager	+315K New position	315K	$20M
Marshall Wace, LLP Hedge fund	+192K New position	192K	$12.2M
Point72 Asset Management, L.P. Hedge fund	+187K New position	187K	$11.9M
Citadel Advisors LLC Hedge fund	+162K +73.4%	383K	$24.2M
Arrowstreet Capital, Limited Partnership Hedge fund	+106K +15.4%	794K	$50.3M
Royce & Associates LP Active manager	+106K New position	106K	$6.7M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Cypress Point Investment Management LP	−808K −51.0%	776K	$49.1M
Dimensional Fund Advisors LP	−613K −39.5%	938K	$59.4M
Blackrock, Inc. Index funds	−494K −16.7%	2.5M	$156M
Bastion Asset Management Inc.	−393K Sold out	0	—
Csm Advisors, LLC	−331K −76.3%	103K	$6.5M
Archon Capital Management LLC	−272K −46.6%	311K	$19.7M
Barclays PLC	−218K −97.7%	5,125	$324,412
Dana Investment Advisors, Inc.	−217K −48.5%	231K	$14.6M
Jacobs Levy Equity Management, Inc Active manager	−181K Sold out	0	—
Palogic Value Management, L.P.	−162K −87.8%	23K	$1.4M
Algert Global LLC Hedge fund	−125K −63.8%	71K	$4.5M
Man Group PLC Hedge fund	−102K Sold out	0	—
Alliancebernstein L.P. Active manager	−102K −47.4%	113K	$2M
Nano Cap New Millennium Growth Fund L P	−100K −75.5%	33K	$2.1M
Bank Of America Corp	−89K −68.1%	42K	$2.6M
HSBC Holdings PLC	−88K −95.2%	4,474	$281,504
Vanguard Global Advisers, LLC	−83K −81.6%	19K	$1.2M
Antipodes Partners Ltd Hedge fund	−66K −44.6%	83K	$5.2M
Lakewood Capital Management, LP Hedge fund	−66K Sold out	0	—
AQR Capital Management LLC Hedge fund	−62K −14.1%	381K	$24.1M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Jacobs Levy Equity Management, Inc Active manager	−181K Sold out	0	—
Algert Global LLC Hedge fund	−125K −63.8%	71K	$4.5M
Man Group PLC Hedge fund	−102K Sold out	0	—
Alliancebernstein L.P. Active manager	−102K −47.4%	113K	$2M
Antipodes Partners Ltd Hedge fund	−66K −44.6%	83K	$5.2M
Lakewood Capital Management, LP Hedge fund	−66K Sold out	0	—
AQR Capital Management LLC Hedge fund	−62K −14.1%	381K	$24.1M
Walleye Capital LLC Hedge fund	−51K −84.5%	9,286	$587,804
Winton Group Ltd Hedge fund	−42K Sold out	0	—
Acadian Asset Management LLC Active manager	−41K −4.9%	792K	$50.1M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Hood River Capital Management LLC	2.3M	$145M
Driehaus Capital Management LLCActive manager	1.4M	$87.9M
Portolan Capital Management, LLC	413K	$26.1M
G2 Investment Partners Management LLC	367K	$23.2M
Jennison Associates LLCActive manager	315K	$20M
Sei Investments Co	227K	$14.4M
Marshall Wace, LLPHedge fund	192K	$12.2M
Point72 Asset Management, L.P.Hedge fund	187K	$11.9M
Pier Capital, LLC	140K	$8.9M
Universal- Beteiligungs- Und Servicegesellschaft Mbh	114K	$7.2M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Bastion Asset Management Inc.	393K	$6.6M
Jacobs Levy Equity Management, IncActive manager	181K	$3.2M
Man Group PLCHedge fund	102K	$1.8M
Lakewood Capital Management, LPHedge fund	66K	$1.2M
Winton Group LtdHedge fund	42K	$747,442
Qube Research & Technologies LtdHedge fund	34K	$602,565
Campbell & Co Investment Adviser LLC	33K	$584,229
State Of Wisconsin Investment Board	31K	$544,134
Guggenheim Capital LLC	16K	$293,923
Martingale Asset Management L PActive manager	14K	$242,352

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 240
Ten largest holders: 42.9%
Index fund managers: 22.4%
Active managers and hedge funds: 33.9%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	39	16	26	7	+4.0M	+63.3%
Index fund managers	10	1	2	0	+84K	+1.2%
Other institutions	123	55	80	14	+2.7M	+24.8%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Bandwidth.

Only managers that filed a holdings report for both quarters are compared (261 here). 2 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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