MAIA

MAIA Biotechnology, Inc.Cluster buy · 3 insiders

Insider trading activity for MAIA Biotechnology, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

+$352.3K

net buying

Bought(7 · 2 insiders): $352.3K
Sold(0 · 0 insiders): $0

Past 6 months

+$556.1K

net buying

Bought(10 · 4 insiders): $556.1K
Sold(0 · 0 insiders): $0

Past 12 months

+$1M

net buying

Bought(28 · 7 insiders): $1M
Sold(0 · 0 insiders): $0

Active cluster buy

3 insiders bought on the open market within 30 days.

All clusters →

MAIA

MAIA Biotechnology, Inc.

$203.8K

total bought

3 insiders3 buys149,700 shares

All 3 insiders bought on Jun 1 — a single shared event.

Vitoc VladChief Executive…$100.9K
Smith StanDirector$100.2K
Gryaznov SergeiChief Scientific…$2.7K

Transaction history

The 79 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 14	Vitoc Vlad	Chief Executive Officer	PBUY	73,000	$1.37	$100K	+7.5%	Open the original filing on SEC.gov
Sep 10	Guerrero Ramiro	Director	PBUY	37,595	$1.32	$49.5K	+5.1%	Open the original filing on SEC.gov
Aug 28	Guerrero Ramiro	Director	PBUY	46,620	$1.35	$62.9K	+6.8%	Open the original filing on SEC.gov
Aug 27	Guerrero Ramiro	Director	PBUY▲	78,239	$1.39	$108.8K	+12.8%	Open the original filing on SEC.gov
Aug 26	Guerrero Ramiro	Director	PBUY	8,931	$1.39	$12.4K	+1.5%	Open the original filing on SEC.gov
Aug 24	Guerrero Ramiro	Director	PBUY	1,794	$1.33	$2.4K	+0.3%	Open the original filing on SEC.gov
Aug 20	Guerrero Ramiro	Director	PBUY	11,899	$1.37	$16.3K	+2.0%	Open the original filing on SEC.gov
Jun 30	Smith Stan	Director	AGRANT◆	32,003	—	—	—	Open the original filing on SEC.gov
Jun 30	Theagene Jean-Manasse	Director	AGRANT◆	26,355	—	—	—	Open the original filing on SEC.gov
Jun 30	Luput Cristian	Director	AGRANT◆	27,610	—	—	—	Open the original filing on SEC.gov
Jun 30	Louie Ngar Yee	Director	AGRANT◆	32,630	—	—	—	Open the original filing on SEC.gov
Jun 30	Guerrero Ramiro	Director	AGRANT◆	26,355	—	—	—	Open the original filing on SEC.gov
Jun 30	Chaouki Steven M	Director	AGRANT◆	26,982	—	—	—	Open the original filing on SEC.gov
Jun 1	Vitoc Vlad	Chief Executive Officer	PBUY	72,700	$1.39	$100.9K	+8.1%	Open the original filing on SEC.gov
Jun 1	Smith Stan	Director	PBUY	75,000	$1.34	$100.2K	+5.2%	Open the original filing on SEC.gov
Jun 1	Gryaznov Sergei	Chief Scientific Officer	PBUY★	2,000	$1.35	$2.7K	+4.5%	Open the original filing on SEC.gov
May 29	Vitoc Vlad	Chief Executive Officer	AGRANT◆	800,000	—	—	—	Open the original filing on SEC.gov
May 29	Himmelreich Jeffrey C	Head of Finance	AGRANT◆	60,000	—	—	—	Open the original filing on SEC.gov
May 29	Gryaznov Sergei	Chief Scientific Officer	AGRANT◆	400,000	—	—	—	Open the original filing on SEC.gov
Apr 10	Vitoc Vlad	Chief Executive Officer	AGRANT◆	800,000	—	—	—	Open the original filing on SEC.gov
Apr 10	Himmelreich Jeffrey C	Head of Finance	AGRANT◆	30,000	—	—	—	Open the original filing on SEC.gov
Apr 10	Gryaznov Sergei	Chief Scientific Officer	AGRANT◆	400,000	—	—	—	Open the original filing on SEC.gov
Mar 31	Theagene Jean-Manasse	Director	AGRANT◆	27,258	—	—	—	Open the original filing on SEC.gov
Mar 31	Smith Stan	Director	AGRANT◆	33,099	—	—	—	Open the original filing on SEC.gov
Mar 31	Luput Cristian	Director	AGRANT◆	28,556	—	—	—	Open the original filing on SEC.gov
Mar 31	Louie Ngar Yee	Director	AGRANT◆	33,748	—	—	—	Open the original filing on SEC.gov
Mar 31	Guerrero Ramiro	Director	AGRANT◆	27,258	—	—	—	Open the original filing on SEC.gov
Mar 31	Chaouki Steven M	Director	AGRANT◆	27,907	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Theagene Jean-Manasse	Director	AGRANT◆	24,060	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Smith Stan	Director	AGRANT◆	29,216	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Luput Cristian	Director	AGRANT◆	25,206	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Louie Ngar Yee	Director	AGRANT◆	29,789	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Guerrero Ramiro	Director	AGRANT◆	24,060	—	—	—	Open the original filing on SEC.gov
Dec 31, 2025	Chaouki Steven M	Director	AGRANT◆	24,633	—	—	—	Open the original filing on SEC.gov
Dec 22, 2025	Smith Stan	Director	PDBUY◆	57,189	$1.36	$77.8K	—	Open the original filing on SEC.gov
Dec 22, 2025	Smith Stan	Director	PBUY	57,189	$1.22	$70K	+4.2%	Open the original filing on SEC.gov
Dec 22, 2025	Louie Ngar Yee	Director	PDBUY◆	81,699	$1.36	$111.1K	—	Open the original filing on SEC.gov
Dec 22, 2025	Louie Ngar Yee	Director	PBUY★	81,699	$1.22	$100K	+7.0%	Open the original filing on SEC.gov
Dec 22, 2025	Chaouki Steven M	Director	PDBUY◆	40,849	$1.36	$55.6K	—	Open the original filing on SEC.gov
Dec 22, 2025	Chaouki Steven M	Director	PBUY★	40,849	$1.22	$50K	+36.8%	Open the original filing on SEC.gov
Dec 5, 2025	Smith Stan	Director	PBUY	4,580	$1.20	$5.5K	—	Open the original filing on SEC.gov
Dec 5, 2025	Smith Stan	Director	PBUY	4,580	$1.19	$5.5K	—	Open the original filing on SEC.gov
Dec 5, 2025	Smith Stan	Director	PBUY	4,580	$1.20	$5.5K	—	Open the original filing on SEC.gov
Nov 28, 2025	Luput Cristian	Director	PBUY	18,145	$1.11	$20.2K	+4.3%	Open the original filing on SEC.gov
Nov 28, 2025	Vitoc Vlad	Chief Executive Officer	PBUY↺	50,000	$1.14	$56.8K	+5.9%	Open the original filing on SEC.gov
Nov 26, 2025	Smith Stan	Director	PBUY	15,000	$1.04	$15.6K	+1.1%	Open the original filing on SEC.gov
Nov 26, 2025	Luput Cristian	Director	PBUY	20,000	$1.08	$21.6K	+5.0%	Open the original filing on SEC.gov
Nov 26, 2025	Vitoc Vlad	Chief Executive Officer	PBUY↺	22,000	$1.05	$23K	+2.6%	Open the original filing on SEC.gov
Nov 25, 2025	Smith Stan	Director	PBUY	15,000	$0.98	$14.7K	+1.1%	Open the original filing on SEC.gov
Nov 25, 2025	Luput Cristian	Director	PBUY★	10,000	$0.9785	$9.8K	+2.6%	Open the original filing on SEC.gov
Nov 25, 2025	Vitoc Vlad	Chief Executive Officer	PBUY↺	10,500	$0.9661	$10.1K	+1.3%	Open the original filing on SEC.gov
Nov 24, 2025	Vitoc Vlad	Chief Executive Officer	PBUY▲	10,000	$0.9891	$9.9K	+1.2%	Open the original filing on SEC.gov
Nov 24, 2025	Smith Stan	Director	PBUY↓	10,000	$0.99	$9.9K	+0.8%	Open the original filing on SEC.gov
Nov 21, 2025	Vitoc Vlad	Chief Executive Officer	PBUY★	1,800	$0.92	$1.7K	+0.2%	Open the original filing on SEC.gov
Oct 2, 2025	Smith Stan	Director	AGRANT◆	24,844	—	—	—	Open the original filing on SEC.gov
Oct 2, 2025	Theagene Jean-Manasse	Director	AGRANT◆	20,459	—	—	—	Open the original filing on SEC.gov
Oct 2, 2025	Luput Cristian	Director	AGRANT◆	21,434	—	—	—	Open the original filing on SEC.gov
Oct 2, 2025	Louie Ngar Yee	Director	AGRANT◆	25,331	—	—	—	Open the original filing on SEC.gov
Oct 2, 2025	Guerrero Ramiro	Director	AGRANT◆	20,459	—	—	—	Open the original filing on SEC.gov
Oct 2, 2025	Chaouki Steven M	Director	AGRANT◆	20,946	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Smith Stan	Director	PDBUY◆	19,230	$1.57	$30.2K	—	Open the original filing on SEC.gov
Oct 1, 2025	Smith Stan	Director	PBUY	19,230	$1.30	$25K	+1.5%	Open the original filing on SEC.gov
Jun 30, 2025	Smith Stan	Director	AGRANT◆	24,747	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Theagene Jean-Manasse	Director	AGRANT◆	20,380	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Luput Cristian	Director	AGRANT◆	21,350	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Louie Ngar Yee	Director	AGRANT◆	25,232	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Guerrero Ramiro	Director	AGRANT◆	20,380	—	—	—	Open the original filing on SEC.gov
Jun 30, 2025	Chaouki Steven M	Director	AGRANT◆	20,865	—	—	—	Open the original filing on SEC.gov
Jun 3, 2025	Smith Stan	Director	PDBUY◆	33,333	$1.71	$57K	—	Open the original filing on SEC.gov
Jun 3, 2025	Smith Stan	Director	PBUY	33,333	$1.50	$50K	+2.6%	Open the original filing on SEC.gov
May 14, 2025	Vitoc Vlad	Chief Executive Officer	AGRANT◆	400,000	—	—	—	Open the original filing on SEC.gov
May 14, 2025	Himmelreich Jeffrey C	Head of Finance	AGRANT◆	40,000	—	—	—	Open the original filing on SEC.gov
May 14, 2025	Gryaznov Sergei	Chief Scientific Officer	AGRANT◆	200,000	—	—	—	Open the original filing on SEC.gov
May 8, 2025	Smith Stan	Director	PDBUY◆	66,666	$2.05	$136.7K	—	Open the original filing on SEC.gov
May 8, 2025	Smith Stan	Director	PBUY▲↓	66,666	$1.50	$100K	+5.5%	Open the original filing on SEC.gov
May 8, 2025	Guerrero Ramiro	Director	PDBUY◆	20,000	$2.05	$41K	—	Open the original filing on SEC.gov
May 8, 2025	Guerrero Ramiro	Director	PBUY★	20,000	$1.50	$30K	+3.5%	Open the original filing on SEC.gov
May 1, 2024	Smith Stan	Director	GGIFT	20,000	—	—	+1.4%	Open the original filing on SEC.gov
Sep 19, 2022	Smith Stan	Director	PBUY	2,700	$3.69	$10K	+0.2%	Open the original filing on SEC.gov

PBUY$100K

Vitoc Vlad · Chief Executive…Sep 14

73,000 sh @ $1.37 · +7.5% own

PBUY$49.5K

Guerrero Ramiro · DirectorSep 10

37,595 sh @ $1.32 · +5.1% own

PBUY$62.9K

Guerrero Ramiro · DirectorAug 28

46,620 sh @ $1.35 · +6.8% own

PBUY▲$108.8K

Guerrero Ramiro · DirectorAug 27

78,239 sh @ $1.39 · +12.8% own

PBUY$12.4K

Guerrero Ramiro · DirectorAug 26

8,931 sh @ $1.39 · +1.5% own

PBUY$2.4K

Guerrero Ramiro · DirectorAug 24

1,794 sh @ $1.33 · +0.3% own

PBUY$16.3K

Guerrero Ramiro · DirectorAug 20

11,899 sh @ $1.37 · +2.0% own

AGRANT◆—

Smith Stan · DirectorJun 30

32,003 sh

AGRANT◆—

Theagene Jean-Manasse · DirectorJun 30

26,355 sh

AGRANT◆—

Luput Cristian · DirectorJun 30

27,610 sh

AGRANT◆—

Louie Ngar Yee · DirectorJun 30

32,630 sh

AGRANT◆—

Guerrero Ramiro · DirectorJun 30

26,355 sh

AGRANT◆—

Chaouki Steven M · DirectorJun 30

26,982 sh

PBUY$100.9K

Vitoc Vlad · Chief Executive…Jun 1

72,700 sh @ $1.39 · +8.1% own

PBUY$100.2K

Smith Stan · DirectorJun 1

75,000 sh @ $1.34 · +5.2% own

PBUY★$2.7K

Gryaznov Sergei · Chief Scientific…Jun 1

2,000 sh @ $1.35 · +4.5% own

AGRANT◆—

Vitoc Vlad · Chief Executive…May 29

800,000 sh

AGRANT◆—

Himmelreich Jeffrey C · Head of FinanceMay 29

60,000 sh

AGRANT◆—

Gryaznov Sergei · Chief Scientific…May 29

400,000 sh

AGRANT◆—

Vitoc Vlad · Chief Executive…Apr 10

800,000 sh

AGRANT◆—

Himmelreich Jeffrey C · Head of FinanceApr 10

30,000 sh

AGRANT◆—

Gryaznov Sergei · Chief Scientific…Apr 10

400,000 sh

AGRANT◆—

Theagene Jean-Manasse · DirectorMar 31

27,258 sh

AGRANT◆—

Smith Stan · DirectorMar 31

33,099 sh

AGRANT◆—

Luput Cristian · DirectorMar 31

28,556 sh

AGRANT◆—

Louie Ngar Yee · DirectorMar 31

33,748 sh

AGRANT◆—

Guerrero Ramiro · DirectorMar 31

27,258 sh

AGRANT◆—

Chaouki Steven M · DirectorMar 31

27,907 sh

AGRANT◆—

Theagene Jean-Manasse · DirectorDec 31, 2025

24,060 sh

AGRANT◆—

Smith Stan · DirectorDec 31, 2025

29,216 sh

AGRANT◆—

Luput Cristian · DirectorDec 31, 2025

25,206 sh

AGRANT◆—

Louie Ngar Yee · DirectorDec 31, 2025

29,789 sh

AGRANT◆—

Guerrero Ramiro · DirectorDec 31, 2025

24,060 sh

AGRANT◆—

Chaouki Steven M · DirectorDec 31, 2025

24,633 sh

PDBUY◆$77.8K

Smith Stan · DirectorDec 22, 2025

57,189 sh @ $1.36

PBUY$70K

Smith Stan · DirectorDec 22, 2025

57,189 sh @ $1.22 · +4.2% own

PDBUY◆$111.1K

Louie Ngar Yee · DirectorDec 22, 2025

81,699 sh @ $1.36

PBUY★$100K

Louie Ngar Yee · DirectorDec 22, 2025

81,699 sh @ $1.22 · +7.0% own

PDBUY◆$55.6K

Chaouki Steven M · DirectorDec 22, 2025

40,849 sh @ $1.36

PBUY★$50K

Chaouki Steven M · DirectorDec 22, 2025

40,849 sh @ $1.22 · +36.8% own

PBUY$5.5K

Smith Stan · DirectorDec 5, 2025

4,580 sh @ $1.20

PBUY$5.5K

Smith Stan · DirectorDec 5, 2025

4,580 sh @ $1.19

PBUY$5.5K

Smith Stan · DirectorDec 5, 2025

4,580 sh @ $1.20

PBUY$20.2K

Luput Cristian · DirectorNov 28, 2025

18,145 sh @ $1.11 · +4.3% own

PBUY↺$56.8K

Vitoc Vlad · Chief Executive…Nov 28, 2025

50,000 sh @ $1.14 · +5.9% own

PBUY$15.6K

Smith Stan · DirectorNov 26, 2025

15,000 sh @ $1.04 · +1.1% own

PBUY$21.6K

Luput Cristian · DirectorNov 26, 2025

20,000 sh @ $1.08 · +5.0% own

PBUY↺$23K

Vitoc Vlad · Chief Executive…Nov 26, 2025

22,000 sh @ $1.05 · +2.6% own

PBUY$14.7K

Smith Stan · DirectorNov 25, 2025

15,000 sh @ $0.98 · +1.1% own

PBUY★$9.8K

Luput Cristian · DirectorNov 25, 2025

10,000 sh @ $0.9785 · +2.6% own

PBUY↺$10.1K

Vitoc Vlad · Chief Executive…Nov 25, 2025

10,500 sh @ $0.9661 · +1.3% own

PBUY▲$9.9K

Vitoc Vlad · Chief Executive…Nov 24, 2025

10,000 sh @ $0.9891 · +1.2% own

PBUY↓$9.9K

Smith Stan · DirectorNov 24, 2025

10,000 sh @ $0.99 · +0.8% own

PBUY★$1.7K

Vitoc Vlad · Chief Executive…Nov 21, 2025

1,800 sh @ $0.92 · +0.2% own

AGRANT◆—

Smith Stan · DirectorOct 2, 2025

24,844 sh

AGRANT◆—

Theagene Jean-Manasse · DirectorOct 2, 2025

20,459 sh

AGRANT◆—

Luput Cristian · DirectorOct 2, 2025

21,434 sh

AGRANT◆—

Louie Ngar Yee · DirectorOct 2, 2025

25,331 sh

AGRANT◆—

Guerrero Ramiro · DirectorOct 2, 2025

20,459 sh

AGRANT◆—

Chaouki Steven M · DirectorOct 2, 2025

20,946 sh

PDBUY◆$30.2K

Smith Stan · DirectorOct 1, 2025

19,230 sh @ $1.57

PBUY$25K

Smith Stan · DirectorOct 1, 2025

19,230 sh @ $1.30 · +1.5% own

AGRANT◆—

Smith Stan · DirectorJun 30, 2025

24,747 sh

AGRANT◆—

Theagene Jean-Manasse · DirectorJun 30, 2025

20,380 sh

AGRANT◆—

Luput Cristian · DirectorJun 30, 2025

21,350 sh

AGRANT◆—

Louie Ngar Yee · DirectorJun 30, 2025

25,232 sh

AGRANT◆—

Guerrero Ramiro · DirectorJun 30, 2025

20,380 sh

AGRANT◆—

Chaouki Steven M · DirectorJun 30, 2025

20,865 sh

PDBUY◆$57K

Smith Stan · DirectorJun 3, 2025

33,333 sh @ $1.71

PBUY$50K

Smith Stan · DirectorJun 3, 2025

33,333 sh @ $1.50 · +2.6% own

AGRANT◆—

Vitoc Vlad · Chief Executive…May 14, 2025

400,000 sh

AGRANT◆—

Himmelreich Jeffrey C · Head of FinanceMay 14, 2025

40,000 sh

AGRANT◆—

Gryaznov Sergei · Chief Scientific…May 14, 2025

200,000 sh

PDBUY◆$136.7K

Smith Stan · DirectorMay 8, 2025

66,666 sh @ $2.05

PBUY▲↓$100K

Smith Stan · DirectorMay 8, 2025

66,666 sh @ $1.50 · +5.5% own

PDBUY◆$41K

Guerrero Ramiro · DirectorMay 8, 2025

20,000 sh @ $2.05

PBUY★$30K

Guerrero Ramiro · DirectorMay 8, 2025

20,000 sh @ $1.50 · +3.5% own

GGIFT—

Smith Stan · DirectorMay 1, 2024

20,000 sh · +1.4% own

PBUY$10K

Smith Stan · DirectorSep 19, 2022

2,700 sh @ $3.69 · +0.2% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

2 of 61 filings we hold were filed after the two-business-day deadline. The furthest past the deadline was 823 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Sep 19, 2022	Jan 11	Smith StanDirector	823days · about 3.3 years	$10K	Filing ↗
Aug 26	Sep 1	Guerrero RamiroDirector	2days	$108.8K	Filing ↗

Smith StanDirector

823days · about 3.3 years

Traded Sep 19, 2022 · filed Jan 11Filing ↗

Guerrero RamiroDirector

2days

Traded Aug 26 · filed Sep 1Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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