2026-08-13
AI summary pending
View Full Filing (SEC EDGAR)Atrium Therapeutics Inc
$13.85-1.1%
+$39.1M
Net Activity
-3.47% total shares
Institutions Holding
159
Popularity Rank
#3545
Avg Weight
0.09%
Total Value
$207.3M
159 institutions currently hold RNA, with 89 net buyers and 84 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
84
Net Buying Institutions
89
Top 5 by Value
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Across its top 20 institutional holders, RNA's holder base skews toward low-concentration, high-turnover investors on average (avg. concentration score 20/100, avg. turnover score 55/100).
RNA ranks #3545 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
RNA is a top-conviction position for Crcm LP — at 5.7% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in RNA belongs to Sessa Capital IM, L.P., but the position matters far more to Crcm LP, who has 5.7% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
RNA is down 1.1% today, but institutions show net buying of $39.1M this quarter — a divergence between today's price move and the underlying institutional flow.
+$65.7M
Total Buy Value
$63.3M
Total Sell Value
89
Net Buyers
84
Net Sellers
RNA
Q2 2026
Top 5 Institutional Movers
+$12.8M
-$11.6M
+$8.6M
RNA 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 2026-06-30 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.
No Form 144 planned sale filings in the last 90 days
2
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| T. Rowe Price Associates, Inc. | 13G/A | 2026-08-14 | 8.6% |
| RA Capital Management, L.P. | 13G/A | 2026-08-14 | 0.0% |
| BlackRock, Inc. | 13G/A | 2026-07-27 | 6.6% |
2
Filings (14d)
AI summary pending
View Full Filing (SEC EDGAR)Atrium Therapeutics (RNA) announced that the FDA cleared its Investigational New Drug application for ATR 1072. This clearance allows the company to begin a Phase 1/2 clinical trial for PRKAG2 syndrome, a rare genetic heart condition. The trial, named Corventis, will evaluate the drug's safety and effectiveness.
View Full Filing (SEC EDGAR)04965N104
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,242
Total reported value
$2.2T
3229 13F institutions increased their position this quarter
Institutions Holding
5,990
Total reported value
$3.6T
3033 13F institutions increased their position this quarter
Institutions Holding
6,153
Total reported value
$1.8T
2971 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,125
Total reported value
$257.5B
Held by 4125 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,113
Total reported value
$649.2B
Held by 4113 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,112
Total reported value
$279.5B
Held by 4112 institutions — one of the most-tracked stocks on AlphaSMO
Access RNA's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/RNACLI
npx alphasmo stocks get RNA