Form 4 for SPTX Seaport Therapeutics, Inc.

Accepted 2026-05-04 18:14:20 ET · period of report 2026-05-04 · accession 0001193125-26-204494 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
DMI	2026-05-04 18:14	2026-05-04	SPTX	HEALY JAMES	Dir	C - Cnv Deriv	—	+2.73M	2.73M	New	—
DMI	2026-05-04 18:14	2026-05-04	SPTX	HEALY JAMES	Dir	C - Cnv Deriv	$0.00	-8.58M	0	-100%	$0

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-05-04	C	A	1,927,159	—	1,927,159	I By Sofinnova Venture Partners XI, L.P.	—	—	(F1) Each share of Series A-2 and Series B Preferred Stock (collectively, the "Preferred Stock") was convertible into Common Stock of the Issuer on a one-for-3.1407 basis at the option of the holder, and automatically converted upon the closing of the Issuer's initial public offering without payment of further consideration. The Preferred Stock had no expiration date. (F2) These shares are directly held by Sofinnova Venture Partners XI, L.P. ("SVP XI"). Sofinnova Management XI, L.P. ("SM XI LP") is the general partner of SVP XI, and Sofinnova Management XI, L.L.C. ("SM XI") is the general partner of SM XI LP. The Reporting Person is a managing member of SM XI and may be deemed to share voting and investment discretion with respect to securities directly held by SVP XI. The Reporting Person disclaims beneficial ownership of the securities directly held by SVP XI. This report shall not be construed as an admission that he is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose, except to the extent of his pecuniary interest therein, if any.
2	Common	Common Stock	2026-05-04	C	A	804,379	—	2,731,538	I By Sofinnova Venture Partners XI, L.P.	—	—	(F1) Each share of Series A-2 and Series B Preferred Stock (collectively, the "Preferred Stock") was convertible into Common Stock of the Issuer on a one-for-3.1407 basis at the option of the holder, and automatically converted upon the closing of the Issuer's initial public offering without payment of further consideration. The Preferred Stock had no expiration date. (F2) These shares are directly held by Sofinnova Venture Partners XI, L.P. ("SVP XI"). Sofinnova Management XI, L.P. ("SM XI LP") is the general partner of SVP XI, and Sofinnova Management XI, L.L.C. ("SM XI") is the general partner of SM XI LP. The Reporting Person is a managing member of SM XI and may be deemed to share voting and investment discretion with respect to securities directly held by SVP XI. The Reporting Person disclaims beneficial ownership of the securities directly held by SVP XI. This report shall not be construed as an admission that he is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose, except to the extent of his pecuniary interest therein, if any.
3	Derivative	Series A-2 Preferred Stock	2026-05-04	C	D	6,052,631	$0.00	0	I By Sofinnova Venture Partners XI, L.P.	— · — to —	1,927,159 Common Stock	(F1) Each share of Series A-2 and Series B Preferred Stock (collectively, the "Preferred Stock") was convertible into Common Stock of the Issuer on a one-for-3.1407 basis at the option of the holder, and automatically converted upon the closing of the Issuer's initial public offering without payment of further consideration. The Preferred Stock had no expiration date. (F1) Each share of Series A-2 and Series B Preferred Stock (collectively, the "Preferred Stock") was convertible into Common Stock of the Issuer on a one-for-3.1407 basis at the option of the holder, and automatically converted upon the closing of the Issuer's initial public offering without payment of further consideration. The Preferred Stock had no expiration date. (F1) Each share of Series A-2 and Series B Preferred Stock (collectively, the "Preferred Stock") was convertible into Common Stock of the Issuer on a one-for-3.1407 basis at the option of the holder, and automatically converted upon the closing of the Issuer's initial public offering without payment of further consideration. The Preferred Stock had no expiration date. (F2) These shares are directly held by Sofinnova Venture Partners XI, L.P. ("SVP XI"). Sofinnova Management XI, L.P. ("SM XI LP") is the general partner of SVP XI, and Sofinnova Management XI, L.L.C. ("SM XI") is the general partner of SM XI LP. The Reporting Person is a managing member of SM XI and may be deemed to share voting and investment discretion with respect to securities directly held by SVP XI. The Reporting Person disclaims beneficial ownership of the securities directly held by SVP XI. This report shall not be construed as an admission that he is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose, except to the extent of his pecuniary interest therein, if any.
4	Derivative	Series B Preferred Stock	2026-05-04	C	D	2,526,315	$0.00	0	I By Sofinnova Venture Partners XI, L.P.	— · — to —	804,379 Common Stock	(F1) Each share of Series A-2 and Series B Preferred Stock (collectively, the "Preferred Stock") was convertible into Common Stock of the Issuer on a one-for-3.1407 basis at the option of the holder, and automatically converted upon the closing of the Issuer's initial public offering without payment of further consideration. The Preferred Stock had no expiration date. (F1) Each share of Series A-2 and Series B Preferred Stock (collectively, the "Preferred Stock") was convertible into Common Stock of the Issuer on a one-for-3.1407 basis at the option of the holder, and automatically converted upon the closing of the Issuer's initial public offering without payment of further consideration. The Preferred Stock had no expiration date. (F1) Each share of Series A-2 and Series B Preferred Stock (collectively, the "Preferred Stock") was convertible into Common Stock of the Issuer on a one-for-3.1407 basis at the option of the holder, and automatically converted upon the closing of the Issuer's initial public offering without payment of further consideration. The Preferred Stock had no expiration date. (F2) These shares are directly held by Sofinnova Venture Partners XI, L.P. ("SVP XI"). Sofinnova Management XI, L.P. ("SM XI LP") is the general partner of SVP XI, and Sofinnova Management XI, L.L.C. ("SM XI") is the general partner of SM XI LP. The Reporting Person is a managing member of SM XI and may be deemed to share voting and investment discretion with respect to securities directly held by SVP XI. The Reporting Person disclaims beneficial ownership of the securities directly held by SVP XI. This report shall not be construed as an admission that he is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose, except to the extent of his pecuniary interest therein, if any.