Substantial doubt about the company's ability to continue as a going concern.
“Our existing cash, cash equivalents and short-term investments as of June 30, 2026 will not be sufficient to fund our planned operations for at least the next twelve months from the date of issuance of these financial statements. These conditions raise substantial doubt about our ability to continue as a going concern for at least 12 months after the issuance of the accompanying condensed consolidated financial statements.”
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
The Sep 30, 2026 filing window is
still open — showing the latest known positions. Funds that have not filed yet
carry their prior-quarter positions; a fund that filed without this stock counts
as sold out. Each fund's Change is measured against its own
previous reported quarter, shown in the Reported column. Pick a
completed quarter in the Quarter selector below to put every
fund on one quarter and see the stock-wide activity breakdown.
Holders:38
Total Value:$51,294,714
Total Shares:4,468,183
Institutional Ownership Trend
27 quarters
Holder Concentration
Across 37 13F filers
Top Holder
34.7%
of institutional value
Top 5
84.6%
of institutional value
Top 10
95.4%
of institutional value
HHI
1,972
Moderately concentrated
Who Holds ATRA
Last 8 quarters through Sep 30, 2026 (filing window open)
Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory
records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book.
The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter:
36 filers,
like-for-like change +74.2%; actively managed books +87.1%; index-like books +12.8%.
Holder type
Share
Filers
Change
New
Exited
Registered adviser
93.4%
15
+92.8%
1
1
Bank
1.2%
8
-43.8%
1
0
Holding company
2.5%
4
+5.2%
0
0
Exempt adviser
0.0%
0
—
0
0
Adviser
0.0%
0
—
0
0
Broker-dealer
0.0%
0
—
0
0
Unknown
2.9%
9
-35.2%
2
0
Style
Share
Filers
Change
New
Exited
Index-like
11.2%
7
+12.8%
0
1
Systematic-like
16.2%
4
+200.0%
2
0
Concentrated
44.6%
4
+267.9%
0
0
Diversified active
27.9%
21
-6.7%
2
0
Not measured
0.0%
0
—
0
0
Unknown
0.0%
0
—
0
0
Turnover
Share
Filers
Change
New
Exited
Low turnover
16.3%
16
+2.7%
0
1
Medium turnover
60.3%
9
+102.9%
1
0
High turnover
16.9%
6
+174.3%
3
0
Unknown
6.5%
5
+15.3%
0
0
Not measured
0.0%
0
—
0
0
Holding horizon
Share
Filers
Change
New
Exited
Short horizon
6.9%
7
+21.4%
2
0
Medium horizon
1.9%
3
+6.5%
0
0
Long horizon
75.8%
25
+66.3%
2
1
Unknown
15.4%
1
+254.0%
0
0
Not measured
0.0%
0
—
0
0
13F book size
Share
Filers
Change
New
Exited
Under $1B
0.0%
3
+598.1%
1
0
$1B to $10B
46.4%
7
+231.5%
1
0
$10B to $100B
40.5%
6
+35.2%
0
0
$100B or more
13.1%
20
-2.7%
2
1
Not measured
0.0%
0
—
0
0
Client base
Share
Filers
Change
New
Exited
Individuals and high net worth
1.1%
4
0.0%
0
0
Pooled investment vehicles
84.8%
8
+110.7%
1
0
Registered funds and BDCs
7.5%
3
+6.1%
0
0
Governments and sovereign funds
0.0%
0
-100.0%
0
1
Diversified
0.0%
0
—
0
0
Other
0.0%
0
—
0
0
Other investment advisers
0.0%
0
—
0
0
Unknown
6.6%
21
-26.6%
3
0
Private funds
Share
Filers
Change
New
Exited
Hedge funds
80.7%
7
+135.1%
1
0
Other private funds
5.5%
3
-28.6%
0
1
Mixed private funds
0.0%
0
—
0
0
No private funds
7.2%
5
+13.4%
0
0
Real estate funds
0.0%
0
—
0
0
Unknown
6.6%
21
-26.6%
3
0
Location
Share
Filers
Change
New
Exited
United States
94.2%
28
+91.8%
1
1
Outside the US
5.8%
8
-29.8%
3
0
The Sep 30, 2026 filing window is still open, so its
bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out.
The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later
quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type
comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster
current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and
book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none
was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Fund Ownership of ATRA by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026
Index funds and index ETFs hold 3.18% of shares outstanding.
Fund type
Of shares outstanding
Change
Shares
Funds
Index funds
0.60%
+0.05 pp
60,660
8
Index ETFs
2.58%
+0.33 pp
258,631
3
Active ETFs
0.03%
+0.02 pp
3,164
3
Active funds
0.31%
-0.24 pp
31,385
3
Unclassified
0.00%
0.00 pp
0
0
All registered funds
3.53%
+0.16 pp
353,840
17
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share
positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or
before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have
no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their
advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
