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RNTX · Rein Therapeutics, Inc. · Holdings

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$0.60 +0.04 (+7.81%) At close · Oct 20
Rebalance outlook locked
Market Cap
$47.62M
Shares
86.27M
Volume · Oct 20 296.44K Avg daily vol (3M) 453.09K

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.

Use institutional holdings through the 13F API or MCP → See every holder of RNTX: 13F, 13D and 13G, insiders and funds →
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: 60
Total Value: $42,335,362
Total Shares: 40,731,294

Institutional Ownership Trend

16 quarters

Holder Concentration

Across 59 13F filers
Top Holder
12.9%
Sep 2023 → Jun 2026 · range 12.9% – 79.4%
of institutional value
Top 5
52.4%
Sep 2023 → Jun 2026 · range 52.4% – 93.6%
of institutional value
Top 10
79.1%
Sep 2023 → Jun 2026 · range 79.1% – 99.7%
of institutional value
HHI
759
Sep 2023 → Jun 2026 · range 759 – 6,376
Broadly held

Who Holds RNTX

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: 59 filers, like-for-like change +257.0%; actively managed books +268.3%; index-like books +219.6%.

Holder type Share Filers Change
Registered adviser 78.3% 36 +508.3%
Exempt adviser 0.1% 1 new
Adviser 0.4% 1 0.0%
Bank 1.5% 5 +321.9%
Broker-dealer 0.0% 0 -100.0%
Holding company 1.0% 3 +513.3%
Unknown 18.7% 13 +30.8%

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.

Excluded 2 holders with no observed 2026-03-31 13F and 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

59 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
1
1.69% of filers hold it in their top 10
Mar 31, 2026: 1
Holders above 5%
1
median weight 0.001%
Mar 31, 2026: 0
Crowding
32.5%
of shares outstanding, 85th percentile
Mar 31, 2026: 10.6%
Private-fund advisers
31.2%
of shares outstanding
Institutional ownership
47.6%
47.6% of the estimated free float
Top 10 holders
79.1%
of 13F shares, Herfindahl 0.076
Active holders
+268.3%
like-for-like share change of active filers
5% stakes on record
6
0 13D, 6 13G (1 institutional, 5 passive, 0 exempt)
How long holders have held it value-weighted 4.6 quarters
Under 1 year 53.1% 1 to 3 years 45.1% 3 years or more 1.81% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$1.44
estimated per share
Mar 31, 2026: $2.19
Quarter-end price
$1.04
implied by 13F values
Estimated gain or loss
-27.9%
price against the estimated cost
Estimated at a loss
100.0%
of costed 13F value

Estimated cost covers 81.2% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies RNTX's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 NSRX Nasus Pharma Ltd 3
2 LIQT Liqtech International Inc 3
3 ACTU Actuate Therapeutics, Inc. 4
4 IRD Opus Genetics, Inc. 6
5 CRIS Curis Inc 3
6 QNRX Quoin Pharmaceuticals Ltd. 3
7 KZIA Kazia Therapeutics Ltd 3
8 KLRS Kalaris Therapeutics, Inc. 3
9 CLRB Cellectar Biosciences, Inc. 3
10 DTIL Precision Biosciences Inc 3

Shareholder Targets

13F filers that own its peers but not RNTX, quarter ended Jun 30, 2026

Found through its holder-overlap peers: NSRX, LIQT, ACTU, IRD, CRIS, QNRX, KZIA, KLRS, CLRB, DTIL, SCYX, EPRX, PLRX, OVID, CSR, ANTX, AMAN, SPRB, RXT, TDOC. 633 filers in all.

# Filer In peers
1 Apollo Management Holdings, L.P. Unknown, Concentrated $846,346,770 1 held
2 VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active $235,906,235 9 held
3 Point72 Asset Management, L.P. Registered adviser, Systematic-like $88,186,864 9 held
4 DIMENSIONAL FUND ADVISORS LP Registered adviser, Diversified active $83,185,290 10 held
5 Jupiter Topco LLC Unknown, Diversified active $74,892,262 6 held
6 MILLENNIUM MANAGEMENT LLC Registered adviser, Systematic-like $55,215,885 13 held
7 CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser, Diversified active $54,976,000 8 held
8 SAMSARA BIOCAPITAL, LLC Registered adviser, Concentrated $52,426,382 1 held
9 AQR CAPITAL MANAGEMENT LLC Registered adviser, Diversified active $51,634,958 4 held
10 Balyasny Asset Management L.P. Registered adviser, Systematic-like $49,978,642 9 held

Fund Ownership of RNTX by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 4.34% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 0.32% 274,367
Index ETFs 4.02% 3,471,080
Active ETFs 0.00% 0
Active funds 0.01% 5,739
Unclassified 0.00% 0
All registered funds 4.35% 3,751,186
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.

Holder type: Registered adviser 36 Exempt adviser 1 Adviser 1 Bank 5 Broker-dealer 1 Holding company 3 Unknown 13
Showing 60 of 60
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Voss Capital, LP $5,472,397 12.93% 5,261,921
Cable Car Capital, LP $5,402,800 12.76% 5,195,000
ADAR1 Capital Management, LLC $4,680,000 11.05% 4,500,000
VANGUARD CAPITAL MANAGEMENT LLC $3,513,026 8.30% 3,377,910
BIOS Capital Management, LP $3,101,670 7.33% 2,982,375
Ikarian Capital, LLC $3,068,000 7.25% 2,950,000
GREAT POINT PARTNERS LLC $2,678,000 6.33% 2,575,000
CITADEL ADVISORS LLC $2,536,259 5.99% 2,438,711
Velan Capital Investment Management LP $1,768,000 4.18% 1,700,000
Senvest Management, LLC $1,280,130 3.02% 1,230,895
Prosight Management, LP $1,144,000 2.70% 1,100,000
Bleichroeder LP $1,040,000 2.46% 1,000,000
BOOTHBAY FUND MANAGEMENT, LLC $925,028 2.19% 889,450
GEODE CAPITAL MANAGEMENT, LLC $762,464 1.80% 733,139
UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT CO $532,074 1.26% 511,610
VANGUARD FIDUCIARY TRUST CO $397,815 0.94% 382,515
STATE STREET CORP $394,788 0.93% 379,604
Empery Asset Management, LP $385,667 0.91% 370,834
Sigma Planning Corp $367,824 0.87% 353,677
BlackRock, Inc. $339,251 0.80% 326,204
Texas Capital Bank Wealth Management Services Inc $312,787 0.74% 300,758
Sequoia Financial Advisors, LLC $260,000 0.61% 250,000
GAGNON SECURITIES LLC $238,232 0.56% 229,070
Stonepine Capital Management, LLC $226,759 0.54% 218,038
Palogic Value Management, L.P. $187,200 0.44% 180,000
NORTHERN TRUST CORP $166,108 0.39% 159,720
ABS Investment Management LLC $130,000 0.31% 125,000
Rock Creek Group LLC $130,000 0.31% 125,000
Warberg Asset Management LLC $102,960 0.24% 99,000
CORSAIR CAPITAL MANAGEMENT, L.P. $83,200 0.20% 80,000
GOLDMAN SACHS GROUP INC $82,976 0.20% 79,785
UBS Group AG $59,706 0.14% 57,410
MERCER GLOBAL ADVISORS INC /ADV $52,479 0.12% 50,461
XTX Topco Ltd $47,590 0.11% 45,760
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO $44,137 0.10% 42,440
Americana Partners, LLC $43,513 0.10% 41,840
Chicago Partners Investment Group LLC $42,689 0.10% 41,048
Qube Research & Technologies Ltd $32,018 0.08% 30,787
Savant Capital, LLC $31,749 0.07% 30,528
Ancora Advisors LLC $31,200 0.07% 30,000
Meridian Wealth Advisors, LLC $29,625 0.07% 28,486
SteelPeak Wealth, LLC $26,532 0.06% 33,000
Prime Capital Investment Advisors, LLC $25,013 0.06% 31,111
Global Retirement Partners, LLC $20,088 0.05% 19,316
RENAISSANCE TECHNOLOGIES LLC $19,760 0.05% 19,000
Cane Capital Partners, LLC $18,720 0.04% 18,000
Gleason Group, Inc. $18,000 0.04% 22,389
SANDERS MORRIS HARRIS LLC $16,080 0.04% 20,000
Annandale Capital, LLC $15,627 0.04% 15,026
MORGAN STANLEY $14,890 0.04% 14,318
Vanguard Global Advisers, LLC $13,284 0.03% 12,774
Cetera Investment Advisers $12,211 0.03% 11,742
Rockefeller Capital Management L.P. $5,300 0.01% 5,097
BARCLAYS PLC $2,672 0.01% 2,570
JFS WEALTH ADVISORS, LLC $1,653 0.00% 1,590
US BANCORP \DE\ $1,300 0.00% 1,250
NFSG Corp $77 0.00% 97
ACADIAN ASSET MANAGEMENT LLC $17 0.00% 17
Blue Trust, Inc. $16 0.00% 20
Caitong International Asset Management Co., Ltd $1 0.00% 1
Key facts CIK 1420565 CUSIP 00887A204 13F (30d) 7 filings 7 filers Visit website Investor relations