Vault-13

MAIA BIOTECHNOLOGY INC MAIA

COM · Common Stock · CUSIP 552641102

36 institutional holders +3 vs Q1 2026
13,524,35113.5m shares reported held*
22.2% of all shares outstanding*
$19.4mreported value*
13 new 9 added 3 reduced 10 sold out net bought ≈ $535.8k (+372.1k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 60.8m as of 2026-08-10, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $1.44.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

02040Q3 22: 10Q4 22: 7Q1 23: 7Q2 23: 13Q3 23: 15Q4 23: 23Q1 24: 21Q2 24: 22Q3 24: 18Q4 24: 21Q1 25: 21Q2 25: 21Q3 25: 19Q4 25: 26Q1 26: 33Q2 26: 3636Q3 22Q3 23Q3 24Q3 25Q2 26
Numbers
QuarterHolders
Q3 202210
Q4 20227
Q1 20237
Q2 202313
Q3 202315
Q4 202323
Q1 202421
Q2 202422
Q3 202418
Q4 202421
Q1 202521
Q2 202521
Q3 202519
Q4 202526
Q1 202633
Q2 202636

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
40040Q3 24: 7 bought or addedQ3 24: 8 cut or sold outQ4 24: 12 bought or addedQ4 24: 6 cut or sold outQ4 24Q1 25: 9 bought or addedQ1 25: 8 cut or sold outQ2 25: 14 bought or addedQ2 25: 4 cut or sold outQ2 25Q3 25: 8 bought or addedQ3 25: 7 cut or sold outQ4 25: 16 bought or addedQ4 25: 2 cut or sold outQ4 25Q1 26: 18 bought or addedQ1 26: 8 cut or sold outQ2 26: 22 bought or addedQ2 26: 13 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 202478
Q4 2024126
Q1 202598
Q2 2025144
Q3 202587
Q4 2025162
Q1 2026188
Q2 20262213

Biggest buyers

RENAISSANCE TECHNOLOGIES LLC New +415,700+415.7k
VANGUARD CAPITAL MANAGEMENT LLC Added +339,225+339.2k
BlackRock, Inc. Added +275,033+275.0k
Bleakley Financial Group, LLC New +181,623+181.6k
GEODE CAPITAL MANAGEMENT, LLC Added +143,899+143.9k
VANGUARD FIDUCIARY TRUST CO Added +137,374+137.4k
MORGAN STANLEY Added +90,158+90.2k
NORTHERN TRUST CORP Added +72,632+72.6k
STATE STREET CORP Added +62,800+62.8k
TWO SIGMA INVESTMENTS, LP New +50,383+50.4k

Biggest sellers

Solas Capital Management, LLC Reduced -1,266,159-1.3m
Cable Car Capital, LP Reduced -133,920-133.9k
CORSAIR CAPITAL MANAGEMENT, L.P. Sold out -100,000-100.0k
Creative Planning Sold out -28,602-28.6k
RITHOLTZ WEALTH MANAGEMENT Sold out -23,071-23.1k
O'SHAUGHNESSY ASSET MANAGEMENT, LLC Sold out -20,071-20.1k
UBS Group AG Reduced -18,482-18.5k
Catalyst Funds Management Pty Ltd Sold out -10,800-10.8k
Cambridge Investment Research Advisors, Inc. Sold out -10,620-10.6k
CURIO WEALTH, LLC Sold out -2,000-2.0k

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
FGMK Business Holdings, LLC 13G · passive investor new · filed 2025-03-03 10.0% new 2.9m≈ $4.2m 2025-03-03
Vitoc Vlad 13D · may seek influence filed 2025-12-04
Stated purposeThe Reporting Person acquired the Common Stock reported in this Statement for investment purposes. The Reporting Person may in the future acquire additional Common Stock or dispose of some or all of the Common Stock held by the Reporting Person in open-market transactions or privately negotiated transactions, on such terms and at such times as the Reporting Person may deem advisable. The Reporting Person may engage in short selling or hedging or similar transactions with respect to the Common Stock, on such terms and at such times as the Reporting Person may deem advisable, subject to applicable law. The Reporting Person has no present plan or proposal that would result in any of the actions described in paragraphs (a) through (j) of Item 4 of Schedule 13D. The Reporting Person reserves t… Full filing
9.7% 3.8m≈ $5.5m 2025-12-04

Fell to 5% or below in the last year: Solas Capital Management, LLC (4.9%, 2026-08-14)

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
505Q4 24: 4 buyingQ4 24: 0 sellingQ1 25: 2 buyingQ1 25: 0 sellingQ1 25Q2 25: 2 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 5 buyingQ4 25: 0 sellingQ1 26: 0 buyingQ1 26: 0 sellingQ1 26Q2 26: 3 buyingQ2 26: 0 sellingQ3 26: 2 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20244$675.4k0——
Q1 20252$272.5k0——
Q2 20252$180.0k0——
Q3 20250—0——
Q4 20255$444.4k0——
Q1 20260—0——
Q2 20263$204.3k0——
Q3 20262$352.4k0——
DateInsiderTradeSharesPrice ValueTheir holding
2026-09-14 Vitoc Vlad Chief Executive Officer, director Bought 73,000 $1.37 $100.0k73.0k shares +8%
2026-09-10 Guerrero Ramiro Director Bought 37,595 $1.32 $49.6k37.6k shares +5%
2026-08-28 Guerrero Ramiro Director Bought 46,620 $1.35 $62.9k46.6k shares +7%
2026-08-27 Guerrero Ramiro Director Bought 78,239 $1.39 $108.8k78.2k shares +13%
2026-08-26 Guerrero Ramiro Director Bought 8,931 $1.39 $12.4k8.9k shares +2%
2026-08-24 Guerrero Ramiro Director Bought 1,794 $1.33 $2.4k1.8k shares +<1%
2026-08-20 Guerrero Ramiro Director Bought 11,899 $1.37 $16.3k11.9k shares +2%
2026-06-01 Vitoc Vlad Chief Executive Officer, director Bought 72,700 $1.39 $101.1k72.7k shares +8%
2026-06-01 Smith Stan Director · See Footnote Bought 75,000 $1.34 $100.5k75.0k shares +5%
2026-06-01 Gryaznov Sergei Chief Scientific Officer Bought 2,000 $1.35 $2.7k2.0k shares +4%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Solas Capital Management, LLC 2.34% of their portfolio DARIEN, CT 3,030,8453.0m $4.4m $4.4m 2.34% Reduced -1.3m -1,266,159
2 Alyeska Investment Group, L.P. 0.01% of their portfolio CHICAGO, IL 2,500,0002.5m $3.6m $3.6m 0.01% Unchanged
3 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 2,413,2702.4m $3.5m $3.5m 0.00% Added +339.2k +339,225
4 683 Capital Management, LLC 0.14% of their portfolio NEW YORK, NY 1,066,6661.1m $1.5m $1.5m 0.14% Unchanged
5 Centric Wealth Management 0.17% of their portfolio CHICAGO, IL 796,723796.7k $1.1m $1.1m 0.17% Unchanged
6 Cable Car Capital, LP 0.03% of their portfolio SAN FRANCISCO, CA 514,583514.6k $741.0k $741.0k 0.03% Reduced -133.9k -133,920
7 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 504,380504.4k $726.6k $726.6k 0.00% Added +143.9k +143,899
8 Bleichroeder LP 0.13% of their portfolio NEW YORK, NY 500,000500.0k $720.0k $720.0k 0.13% Unchanged
9 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 415,700415.7k $598.6k $598.6k 0.00% New
10 BlackRock, Inc. 0.00% of their portfolio New York, NY 403,011403.0k $580.3k $580.3k 0.00% Added +275.0k +275,033
11 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 336,688336.7k $484.8k $484.8k 0.00% Added +137.4k +137,374
12 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 201,750201.8k $290.5k $290.5k 0.00% Added +62.8k +62,800
13 Bleakley Financial Group, LLC 0.00% of their portfolio PARSIPPANY, NJ 181,623181.6k $261.5k $261.5k 0.00% New
14 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 125,171125.2k $180.2k $180.2k 0.00% Added +72.6k +72,632
15 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 104,017104.0k $149.8k $149.8k 0.00% Added +90.2k +90,158
16 BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio HOUSTON, TX 76,00076.0k $109.4k $109.4k 0.00% Added +40.0k +40,000
17 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 50,38350.4k $72.6k $72.6k 0.00% New
18 ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio Berwyn, PA 44,34744.3k $63.9k $63.9k 0.00% New
19 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 35,22335.2k $50.7k $50.7k 0.00% New
20 PVG ASSET MANAGEMENT CORP 0.03% of their portfolio GOLDEN, CO 34,13534.1k $49.2k $49.2k 0.03% Unchanged
21 UBS Group AG 0.00% of their portfolio ZURICH, V8 33,43533.4k $48.1k $48.1k 0.00% Reduced -18.5k -18,482
22 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 24,89024.9k $35.8k $35.8k 0.00% New
23 Cetera Investment Advisers 0.00% of their portfolio SCHAUMBURG, IL 22,74822.7k $32.8k $32.8k 0.00% New
24 LAZARI CAPITAL MANAGEMENT, INC. 0.01% of their portfolio WOODLAND HILLS, CA 21,75021.8k $31.3k $31.3k 0.01% New
25 Atria Investments, Inc 0.00% of their portfolio Charlotte, NC 21,10021.1k $30.4k $30.4k 0.00% New
26 Centerpoint Advisory Group 0.01% of their portfolio Overland Park, KS 15,73015.7k $22.7k $22.7k 0.01% Unchanged
27 WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio PLYMOUTH, MN 14,80014.8k $21.3k $21.3k 0.00% Unchanged
28 Vanguard Global Advisers, LLC 0.00% of their portfolio MALVERN, PA 11,40111.4k $16.4k $16.4k 0.00% Unchanged
29 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 8,3348.3k $12.0k $12.0k 0.00% Unchanged
30 Daytona Street Capital LLC 0.01% of their portfolio SAINT LOUIS, MO 7,5007.5k $10.8k $10.8k 0.01% Unchanged
31 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 4,1524.2k $6.0k $6.0k 0.00% New
32 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 3,2083.2k $4.6k $4.6k 0.00% New
33 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 228228 $321 $321 0.00% Unchanged
34 Caitong International Asset Management Co., Ltd 0.00% of their portfolio HONG KONG, K3 210210 $302 $302 0.00% New
35 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 200200 $288 $288 0.00% New
36 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 150150 $216 $216 0.00% Added +128 +128