Vault-13

IMMUCELL CORP ICCC

COM PAR · Common Stock · CUSIP 452525306

31 institutional holders +4 vs Q1 2026
1,333,1771.3m shares reported held*
14.7% of all shares outstanding*
$13.4mreported value*
7 new 7 added 7 reduced 3 sold out net sold ≈ $722.2k (-71.9k 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: 9.1m as of 2026-07-31, 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 ≈ $10.05.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

02040Q3 22: 27Q4 22: 27Q1 23: 31Q2 23: 32Q3 23: 31Q4 23: 29Q1 24: 26Q2 24: 29Q3 24: 23Q4 24: 28Q1 25: 28Q2 25: 26Q3 25: 27Q4 25: 26Q1 26: 27Q2 26: 3131Q3 22Q3 23Q3 24Q3 25Q2 26
Numbers
QuarterHolders
Q3 202227
Q4 202227
Q1 202331
Q2 202332
Q3 202331
Q4 202329
Q1 202426
Q2 202429
Q3 202423
Q4 202428
Q1 202528
Q2 202526
Q3 202527
Q4 202526
Q1 202627
Q2 202631

Buyers vs sellers

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

Bought or addedCut or sold out
20020Q3 24: 7 bought or addedQ3 24: 10 cut or sold outQ4 24: 9 bought or addedQ4 24: 8 cut or sold outQ4 24Q1 25: 7 bought or addedQ1 25: 7 cut or sold outQ2 25: 10 bought or addedQ2 25: 5 cut or sold outQ2 25Q3 25: 8 bought or addedQ3 25: 9 cut or sold outQ4 25: 11 bought or addedQ4 25: 9 cut or sold outQ4 25Q1 26: 9 bought or addedQ1 26: 6 cut or sold outQ2 26: 14 bought or addedQ2 26: 10 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 2024710
Q4 202498
Q1 202577
Q2 2025105
Q3 202589
Q4 2025119
Q1 202696
Q2 20261410

Biggest buyers

RENAISSANCE TECHNOLOGIES LLC Added +19,300+19.3k
JANE STREET GROUP, LLC New +15,751+15.8k
Quadrature Capital Ltd New +15,415+15.4k
MORGAN STANLEY Added +12,194+12.2k
MERCER GLOBAL ADVISORS INC /ADV New +12,000+12.0k
VANGUARD CAPITAL MANAGEMENT LLC Added +7,803+7.8k
GEODE CAPITAL MANAGEMENT, LLC Added +6,505+6.5k
CITADEL ADVISORS LLC Added +4,807+4.8k
BlackRock, Inc. Added +4,674+4.7k
DIMENSIONAL FUND ADVISORS LP Added +2,422+2.4k

Biggest sellers

Bleichroeder LP Reduced -51,594-51.6k
Militia Capital Management LLC Reduced -44,000-44.0k
NORTHERN TRUST CORP Reduced -26,897-26.9k
SHUFRO ROSE & CO LLC Reduced -25,000-25.0k
Essex Financial Services, Inc. Sold out -11,000-11.0k
Steadtrust LLC Reduced -9,000-9.0k
VANGUARD FIDUCIARY TRUST CO Reduced -4,903-4.9k
HARBOUR INVESTMENTS, INC. Sold out -250-250
Advisory Services Network, LLC Sold out -200-200
UBS Group AG Reduced -113-113

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
Knudsen Ejnar A III 13D · may seek influence filed 2025-11-20
Stated purposeAll shares held by the Reporting Person are held by the Reporting Person for investment purposes. The Reporting Person currently has no plans or proposals that relate to, or would result in, any of the matters described in subsections (a) through (j) of Item 4 of the instructions to Schedule 13D. Full filing
9.2% 832.8k 2025-11-20

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
202Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 1 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 2 buyingQ4 25: 0 sellingQ1 26: 0 buyingQ1 26: 0 sellingQ1 26Q2 26: 1 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20250—0——
Q2 20251$6.3k0——
Q3 20250—0——
Q4 20252$47.1k0——
Q1 20260—0——
Q2 20261$76.0k0——
Q3 20260—0——
DateInsiderTradeSharesPrice ValueTheir holding
2026-06-18 te Boekhorst Paul Francis Olivier President and CEO, director Bought 8,000 $9.50 $76.0k8.0k shares +82%

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 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 268,130268.1k $2.7m $2.7m 0.00% Added +7.8k +7,803
2 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 233,910233.9k $2.4m $2.4m 0.00% Added +12.2k +12,194
3 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 171,089171.1k $1.7m $1.7m 0.00% Added +19.3k +19,300
4 Cresset Asset Management, LLC 0.00% of their portfolio Chicago, IL 135,267135.3k $1.4m $1.4m 0.00% Unchanged
5 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 72,27072.3k $726.5k $726.5k 0.00% Added +6.5k +6,505
6 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 58,45258.5k $587.4k $587.4k 0.00% Added +2.4k +2,422
7 Bleichroeder LP 0.09% of their portfolio NEW YORK, NY 50,00050.0k $502.5k $502.5k 0.09% Reduced -51.6k -51,594
8 Steadtrust LLC 0.23% of their portfolio ALLEN, TX 45,37045.4k $456.0k $456.0k 0.23% Reduced -9.0k -9,000
9 Mesirow Financial Investment Management, Inc. 0.01% of their portfolio CHICAGO, IL 42,48142.5k $426.9k $426.9k 0.01% Unchanged
10 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 40,50340.5k $407.1k $407.1k 0.00% Added +4.8k +4,807
11 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 37,76637.8k $379.5k $379.5k 0.00% Reduced -4.9k -4,903
12 Strategic Financial Services, Inc. 0.02% of their portfolio UTICA, NY 37,00037.0k $371.9k $371.9k 0.02% Unchanged
13 HighTower Advisors, LLC 0.00% of their portfolio CHICAGO, IL 24,35424.4k $244.8k $244.8k 0.00% Unchanged
14 BlackRock, Inc. 0.00% of their portfolio New York, NY 22,86022.9k $229.7k $229.7k 0.00% Added +4.7k +4,674
15 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 15,75115.8k $158.3k $158.3k 0.00% New
16 Quadrature Capital Ltd 0.00% of their portfolio LONDON, X0 15,41515.4k $154.9k $154.9k 0.00% New
17 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 14,72114.7k $147.9k $147.9k 0.00% Reduced -26.9k -26,897
18 MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio DENVER, CO 12,00012.0k $120.6k $120.6k 0.00% New
19 BAILARD, INC. 0.00% of their portfolio Foster City, CA 10,10210.1k $101.5k $101.5k 0.00% Unchanged
20 SHUFRO ROSE & CO LLC 0.01% of their portfolio NEW YORK, NY 10,00010.0k $100.5k $100.5k 0.01% Reduced -25.0k -25,000
21 Militia Capital Management LLC 0.02% of their portfolio AUSTIN, TX 10,00010.0k $100.5k $100.5k 0.02% Reduced -44.0k -44,000
22 HM PAYSON & CO 0.00% of their portfolio PORTLAND, ME 4,0004.0k $40.2k $40.2k 0.00% Unchanged
23 UBS Group AG 0.00% of their portfolio ZURICH, V8 1,0001.0k $10.1k $10.1k 0.00% Reduced -113 -113
24 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 391391 $3.9k $3.9k 0.00% Unchanged
25 FMR LLC 0.00% of their portfolio BOSTON, MA 160160 $1.6k $1.6k 0.00% New
26 Capital Advisors, Ltd. LLC 0.00% of their portfolio SHAKER HEIGHTS, OH 9898 $1.0k $1.0k 0.00% Unchanged
27 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 3232 $322 $322 0.00% New
28 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 3030 $302 $302 0.00% New
29 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 1919 $186 $186 0.00% Unchanged
30 Caitong International Asset Management Co., Ltd 0.00% of their portfolio HONG KONG, K3 55 $50 $50 0.00% New
31 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 11 $7 $7 0.00% Unchanged