Who put money into listed small companies, and who took it out, from what they filed with the SEC. Insiders bought with their own money in 169 companies, 17 of them clusters of three or more. The five largest took 58% of the money. 153 companies had net insider buying and 53 net selling, a ratio of 2.89. 13F holders added shares in 109 of 170 companies; the median company's institutionally held shares moved +2.3%. Concentrated managers opened 226 positions and closed 250.
Insiders, 24 August 2026 to 23 September 2026
1. PAMT: 1 insider bought $31.2m, 12.39% of the company
PAMT CORP. Purchases on Form 4 (code P: in the market or privately) in 1 trade; the latest filed 8 September 2026. Largest: MOROUN MATTHEW T, director, $31.2m.
Form 4: 0001683168-26-007021.
2. TENX: 4 insiders bought $4.9m, 6.92% of the company
Tenax Therapeutics Inc. Purchases on Form 4 (code P: in the market or privately) in 10 trades; the latest filed 17 September 2026. Largest: ADAR1 Capital Management, LLC, 10% holder, $4.8m; Doogan Declan, director, $102k; Giordano Christopher Thomas, officer, $11k.
Form 4: 0001193125-26-392319, 0001193125-26-394831, 0001871714-26-000002, 0001940272-26-000017, 0001940272-26-000019, 0001940272-26-000020.
3. PMTS: 5 insiders bought $12.0m, 4.30% of the company
CPI Card Group Inc. Purchases on Form 4 (code P: in the market or privately) in 5 trades, all at $21.50 on 14 September 2026, a single price across several buyers, which is how an offering or a placement reads rather than the market; the latest filed 14 September 2026. Largest: Tricor PMT25 Holdings Inc, 10% holder, $11.3m; Riley H Sanford, director, $300k; Peters Nicholas, director, $250k.
Form 4: 0001104659-26-107610, 0001317406-26-000006, 0001605873-26-000004, 0001654770-26-000004, 0001751947-26-000004.
4. SBLK: 7 insiders bought $4.5m, 0.13% of the company
Star Bulk Carriers Corp. Purchases on Form 4 (code P: in the market or privately) in 7 trades, all at $28.27 on 15 September 2026, a single price across several buyers, which is how an offering or a placement reads rather than the market; the latest filed 17 September 2026. Largest: Pappas Alexandros, insider, $2.1m; Zagari Raffaele, director, $1.4m; Spyrou Symeon, officer, $424k.
Form 4: 0001333848-26-000003, 0001969292-26-000010, 0001969701-26-000006, 0001978604-26-000008, 0002005037-26-000014, 0002011929-26-000010, and 1 more.