AI summary pending
View Full Filing (SEC EDGAR)Puma Biotechnology Inc
$10.290%
+$9.5M
Net Activity
+2.50% total shares
Institutions Holding
164
Popularity Rank
#3488
Avg Weight
0.07%
Total Value
$316.2M
Market Cap
$521.2M
164 institutions currently hold PBYI, with 89 net buyers and 68 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
68
Net Buying Institutions
89
Top 5 by Value
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Across its top 20 institutional holders, PBYI's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 6/100, avg. turnover score 32/100).
PBYI ranks #3488 out of 37696 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
PBYI is a disclosed holding of Jim Simons (Renaissance Technologies), one of the tracked superinvestors on AlphaSMO — it makes up 0.0% of that fund's own 13F portfolio.
PBYI is a top-conviction position for Acorn Capital Advisors, LLC — at 9.1% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
Bailard, Inc. has added to its PBYI position for two straight quarters, increasing it by $64.1K to reach $179.7K today.
PBYI is down 0% today, but institutions show net buying of $9.5M this quarter — a divergence between today's price move and the underlying institutional flow.
PBYI posted net income of $26.7M over the trailing twelve months, and currently trades at a P/E of 19.5.
+$25.9M
Total Buy Value
$16.5M
Total Sell Value
89
Net Buyers
68
Net Sellers
PBYI
Q2 2026
Top 5 Institutional Movers
PBYI does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
2
Filings (90d)
$611K
Total Est. Value
67K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| Cesano Alessandra | 2026-09-14 | $566K |
| WILSON TROY EDWARD | 2026-09-14 | $46K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
1
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| Alan H. Auerbach | 13D/A | 2026-10-06 | 16.0% |
1
Filings (14d)
AI summary pending
View Full Filing (SEC EDGAR)74587V107
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,278
Total reported value
$2.2T
3254 13F institutions increased their position this quarter
Institutions Holding
6,025
Total reported value
$3.6T
3054 13F institutions increased their position this quarter
Institutions Holding
6,188
Total reported value
$1.8T
2995 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,255
Total reported value
$346.5B
Held by 4255 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,146
Total reported value
$257.5B
Held by 4146 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,137
Total reported value
$279.7B
Held by 4137 institutions — one of the most-tracked stocks on AlphaSMO
Access PBYI's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/PBYICLI
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