undamentalytics Newsletter

RTB Digital, Inc.: which funds bought and sold

Institutions that bought and sold RTB Digital 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, 12 institutions that filed 13F reports for both quarters added to or opened positions in RTB Digital, and 4 cut or closed them. Together they added a net 673K shares, +1283.3% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 392K shares; index fund managers were net buyers of 264K shares (+885.9%). 6 opened a new position and 1 sold out entirely.

Bought, Q2 2026 12 institutions, 6 of them new holders Sold, Q2 2026 4 institutions, 1 of them sold out
Net change, all compared +673K shares (+1283.3%)
Net change, active managers +392K shares (—), 2 bought, 0 sold

Buyers versus sellers

institutions compared, 19
Active managers and hedge funds 2 bought · 0 sold · +392K
Index fund managers 6 bought · 0 sold · +264K
Other institutions 4 bought · 4 sold · +17K

Biggest buyers

by change in shares held
Biggest buyers
Institution Change in shares Shares June 30, 2026 Value
Armistice Capital, LLC Hedge fund +350K New position 350K $5.3M
Geode Capital Management, LLC Index funds +140K +819.2% 157K $2.4M
State Street Corp Index funds +45K New position 45K $678,283
Millennium Management LLC Hedge fund +42K New position 42K $632,440
Blackrock, Inc. Index funds +31K +8391.1% 32K $476,332
Northern Trust Corp Index funds +29K New position 29K $444,664
Jane Street Group, LLC +15K New position 15K $228,085
Vanguard Capital Management LLC Index funds +13K +173.3% 20K $303,002
Vanguard Fiduciary Trust Co Index funds +5,820 +116.0% 11K $163,422
UBS Group AG +2,726 +3634.7% 2,801 $42,239
Royal Bank Of Canada +284 +28.8% 1,271 $19,000
Integrated Wealth Concepts LLC +7 New position 7 $105

Biggest sellers

by change in shares held
Biggest sellers
Institution Change in shares Shares June 30, 2026 Value
Tower Research Capital LLC (TRC) −990 Sold out 0 —
Wolff Wiese Magana LLC −12 −60.0% 8 $121
Osaic Holdings, Inc. −9 −1.8% 492 $7,419
BNP Paribas Financial Markets −1 −25.0% 3 $45

New positions

largest by value
InstitutionSharesValue June 30, 2026
Armistice Capital, LLCHedge fund 350K $5.3M
State Street CorpIndex funds 45K $678,283
Millennium Management LLCHedge fund 42K $632,440
Northern Trust CorpIndex funds 29K $444,664
Jane Street Group, LLC 15K $228,085
Integrated Wealth Concepts LLC 7 $105

Sold out

largest by value
InstitutionSharesValue March 31, 2026
Tower Research Capital LLC (TRC) 990 $4,990

Who holds the shares

13F holdings at June 30, 2026
Institutions reporting
18
Ten largest holders
99.4%
of 13F-reported shares
Index fund managers
40.5%
of 13F-reported shares
Active managers and hedge funds
54.0%
of 13F-reported shares
Buying and selling by type of institution, March 31, 2026 to June 30, 2026
TypeBoughtSoldNewSold outNet change in sharesNet %
Active managers and hedge funds 2 0 2 0 +392K —
Index fund managers 6 0 2 0 +264K +885.9%
Other institutions 4 4 2 1 +17K +75.6%

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.

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