Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Birchtech Corp.

CIK 0000728385BCHT· quarter ending 2026-06-30
Shares outstanding
26,305,966
Held by 13F filers
4,552,238
17.3% of shares outstanding
Holders
27
+4 vs 2026-03-31 · 9 new, 5 exited
Value
$9.3M
shares +27.0% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-13, as of 2026-08-13)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common stockBCHT · NYSE26,305,9664,552,23817.3%2759833H200

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine
CountCUSIPClass (as filers write it)HoldersShares heldClass shares% of classValueOptionsMapped via
59833H200COM SHS274,552,23826,305,96617.3%$9.3M—13DGholders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings. 1 further CUSIPs map to this company (mostly bonds) but no 13F filer held them this quarter.

Top holders (27 of 27 · 59833H200)

change vs 2026-03-31
#FilerShares% of classValueChange
1HEARTLAND ADVISORS INC1,000,0003.80%$2.0M—
2VANGUARD CAPITAL MANAGEMENT LLC721,1822.74%$1.5MNEW
3Ancora Advisors LLC700,2442.66%$1.4M+271,558 (+63.3%)
4CHAPIN DAVIS, INC.686,6932.61%$1.4M—
5Aristides Capital LLC425,0001.62%$871K—
6WHITE PINE CAPITAL LLC330,1541.26%$677K-310,904 (-48.5%)
7GEODE CAPITAL MANAGEMENT, LLC139,1920.53%$285KNEW
8VANGUARD FIDUCIARY TRUST CO103,6670.39%$213KNEW
9BlackRock, Inc.71,2500.27%$146KNEW
10ARS Investment Partners, LLC64,2000.24%$132K+13,100 (+25.6%)
11Diametric Capital, LP52,9540.20%$105K+11,269 (+27.0%)
12Sigma Planning Corp52,4120.20%$107K—
13NORTHERN TRUST CORP47,5550.18%$97KNEW
14CITADEL ADVISORS LLC41,3850.16%$85K-9,609 (-18.8%)
15Crewe Advisors LLC35,6000.14%$73K+19,000 (+114.5%)
16Corient Private Wealth LP21,5440.08%$44KNEW
17UBS Group AG15,5130.06%$32K+8,207 (+112.3%)
18WATERS PARKERSON & CO., LLC13,0000.05%$27K—
19CIBC WORLD MARKET INC.10,6070.04%$22K—
20Smartleaf Asset Management LLC9,0910.03%$19K—
21NATIONAL BANK OF CANADA /FI/4,8820.02%$12K+83 (+1.7%)
22Persistent Asset Partners Ltd3,0940.01%$6KNEW
23MORGAN STANLEY2,5000.01%$5K—
24ROYAL BANK OF CANADA5060.00%$1KNEW
25Caitong International Asset Management Co., Ltd100.00%$20+1 (+11.1%)
26BARCLAYS PLC20.00%$4NEW
27HUNTINGTON NATIONAL BANK10.00%$2—
Exited since 2026-03-31 (5 filers; largest 5 shown)
Focus Partners Wealth−42,700
HRT FINANCIAL LP−33,855
Mink Brook Asset Management LLC−30,000
GTS SECURITIES LLC−25,233
PRELUDE CAPITAL MANAGEMENT, LLC−10,377

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting personFormFiledEventShares% of class
Laurence W. LyttonSCHEDULE 13G2026-10-052026-09-291,380,5135.2%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.