13D·WATCH Activist + Insider Intelligence Live feed Blog About Pilot
ISSUER PROFILE · CIK 0001827506

Tourmaline Bio, Inc.

2 13D/G filings 2 distinct filers 59 insider transactions (365d)

Cross-Reference Snapshot

Activist filings
2
2 SC
Distinct filers
2
multi-activist cluster
Insiders (365d)
59
0 buys · 37 sales
Latest short DTC
no FINRA match

13D/G Filings Timeline · 2 total

FiledFormFilerStakeSharesIntent
2023-10-30 SC Longitude Capital Partners III, LLC view →
2023-10-30 SC Qiming U.S. Healthcare GP II, LLC view →

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2025-10-28 SIEGALL CLAY B director Disposition 20,000 $18.55 $371K
2025-10-28 Thiara Parvinder director U 83,782
2025-10-28 Srivastava Sapna director U 518
2025-10-28 MCDADE MARK director U 518
2025-10-28 KANTOFF AARON director U 88,281
2025-10-28 Castelein Caley director U 515,997
2025-10-28 Johnson Kevin Bruce officer U 40,538
2025-10-28 Jones Susan Dana officer U 19,782
2025-10-28 MIDDLEKAUFF W BRADFORD officer U 60,988
2025-10-28 Robinson Ryan F. officer U 14,366
2025-10-28 Kulkarni Sandeep Chidambar director, officer U 724,664
2025-10-28 SIEGALL CLAY B director Disposition 15,000 $13.91 $209K
2025-10-28 SIEGALL CLAY B director Disposition 16,800 $18.73 $315K
2025-10-28 MIDDLEKAUFF W BRADFORD officer Disposition 8,213
2025-10-28 MIDDLEKAUFF W BRADFORD officer Disposition 124,991 $7.90 $987K
2025-10-28 MIDDLEKAUFF W BRADFORD officer Disposition 46,774 $9.46 $442K
2025-10-28 MIDDLEKAUFF W BRADFORD officer Disposition 58,000 $17.00 $986K
2025-10-28 MCDADE MARK director U 183,177
2025-10-28 MCDADE MARK director U 110,083
2025-10-28 MCDADE MARK director U 448,431
2025-10-28 MCDADE MARK director Disposition 20,000 $9.46 $189K
2025-10-28 MCDADE MARK director Disposition 10,000 $13.91 $139K
2025-10-28 MCDADE MARK director Disposition 16,800 $18.73 $315K
2025-10-28 Castelein Caley director U 431,939
2025-10-28 Castelein Caley director Disposition 10,000 $9.46 $95K
Showing 25 of 59

Alert me when any activist files on Tourmaline Bio, Inc.

Free. We email you when criteria match. One-click unsubscribe in every email.

Track every activist who touches this name.

Custom alerts · full feed · daily intelligence · API. $1,500/mo. Pilots welcome.

Request a pilot →