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Holdings (Monthly) Guide ↗

Siit Extended Market Index Fund

· Sei Institutional Investments Trust
Monthly Holdings $1.3B AUM 189 positions Period May 2026 Filed Jul 29, 2026 EDGAR ↗ ← All Funds
All 189 New 335 Added 144 Reduced 51 Exited · May 2026 vs Feb 2026
# Name Ticker Since Shares Shares Δ Value Val Δ% % Port Cat
1 N/A RTYM26 Feb 2026 53 NEW $7.7M 0.59% DE
2 N/A 783965593 Feb 2026 5,940,718 NEW $5.9M 0.45% STIV
3 NEXTPOWER INC. N/A Feb 2026 22,900 NEW $3.6M 0.27% EC
4 N/A DMM26 Feb 2026 9 NEW $3.4M 0.26% DE
5 N/A RTYM26 Feb 2026 22 NEW $3.2M 0.24% DE
6 ALCOA CORPORATION N/A Feb 2026 40,200 NEW $3.1M 0.24% EC
7 ATLASSIAN CORPORATION N/A Feb 2026 25,741 NEW $2.8M 0.21% EC
8 ANNALY CAPITAL MANAGEMENT, INC. N/A Feb 2026 112,339 NEW $2.5M 0.19% EC
9 BORGWARNER INC. N/A Feb 2026 32,700 NEW $2.3M 0.18% EC
10 N/A DMM26 Feb 2026 6 NEW $2.2M 0.17% DE
11 MEDLINE INC. 58507V107 May 2026 55,156 NEW $2.0M 0.15% EC
12 N/A ESM26 Feb 2026 5 NEW $1.9M 0.14% DE
13 EQUITABLE HOLDINGS, INC. N/A Feb 2026 45,500 NEW $1.9M 0.14% EC
14 ADVANCED ENERGY INDUSTRIES, INC. N/A Feb 2026 5,919 NEW $1.8M 0.14% EC
15 APPLIED DIGITAL CORPORATION N/A Feb 2026 35,700 NEW $1.7M 0.13% EC
16 ARROW ELECTRONICS, INC. N/A Feb 2026 7,825 NEW $1.7M 0.13% EC
17 SPX TECHNOLOGIES, INC. N/A Feb 2026 7,594 NEW $1.6M 0.13% EC
18 BOOZ ALLEN HAMILTON HOLDING CORPORATION N/A Feb 2026 19,065 NEW $1.5M 0.11% EC
19 AAON, INC. N/A Feb 2026 10,375 NEW $1.5M 0.11% EC
20 MOLINA HEALTHCARE, INC. 60855R100 May 2026 8,200 NEW $1.4M 0.11% EC
21 SOUTHSTATE BANK CORPORATION N/A Feb 2026 14,785 NEW $1.4M 0.11% EC
22 ARGAN, INC. N/A Feb 2026 2,079 NEW $1.4M 0.11% EC
23 AURORA INNOVATION, INC. N/A Feb 2026 187,600 NEW $1.4M 0.10% EC
24 MATCH GROUP, INC. 57667L107 May 2026 37,800 NEW $1.4M 0.10% EC
25 AMERICAN FINANCIAL GROUP, INC. N/A Feb 2026 10,453 NEW $1.4M 0.10% EC
26 AGREE REALTY CORPORATION N/A Feb 2026 17,947 NEW $1.3M 0.10% EC
27 AMKOR TECHNOLOGY, INC. N/A Feb 2026 18,738 NEW $1.3M 0.10% EC
28 AFFILIATED MANAGERS GROUP, INC. N/A Feb 2026 4,140 NEW $1.3M 0.10% EC
29 APTARGROUP, INC. N/A Feb 2026 10,266 NEW $1.2M 0.09% EC
30 AEROVIRONMENT, INC. N/A Feb 2026 5,505 NEW $1.1M 0.09% EC
31 PAYCOM SOFTWARE, INC. 70432V102 May 2026 8,000 NEW $1.1M 0.09% EC
32 AVNET, INC. N/A Feb 2026 12,099 NEW $1.1M 0.08% EC
33 AGCO CORPORATION N/A Feb 2026 9,323 NEW $1.0M 0.08% EC
34 BIO-RAD LABORATORIES, INC. N/A Feb 2026 3,080 NEW $962K 0.07% EC
35 ARCOSA, INC. N/A Feb 2026 7,513 NEW $952K 0.07% EC
36 LAMB WESTON HOLDINGS, INC. 513272104 May 2026 21,700 NEW $937K 0.07% EC
37 Protagonist Therapeutics Inc N/A Feb 2026 9,300 NEW $926K 0.07% EC
38 ESSENTIAL PROPERTIES REALTY TRUST, INC. N/A Feb 2026 29,100 NEW $890K 0.07% EC
39 BLACK HILLS CORPORATION N/A Feb 2026 12,202 NEW $889K 0.07% EC
40 PIPER SANDLER COMPANIES 724078209 May 2026 11,108 NEW $871K 0.07% EC
41 ALASKA AIR GROUP, INC. N/A Feb 2026 18,400 NEW $847K 0.06% EC
42 BOOT BARN HOLDINGS, INC. N/A Feb 2026 4,900 NEW $832K 0.06% EC
43 BALCHEM CORPORATION N/A Feb 2026 5,288 NEW $829K 0.06% EC
44 ALBERTSONS COMPANIES, INC. N/A Feb 2026 52,100 NEW $813K 0.06% EC
45 U-Haul Holding Company N/A Feb 2026 14,700 NEW $765K 0.06% EC
46 H & R BLOCK, INC. N/A Feb 2026 19,600 NEW $754K 0.06% EC
47 AAR CORP. N/A Feb 2026 6,329 NEW $713K 0.05% EC
48 CNO FINANCIAL GROUP, INC. N/A Feb 2026 14,825 NEW $682K 0.05% EC
49 AXCELIS TECHNOLOGIES, INC. N/A Feb 2026 4,450 NEW $669K 0.05% EC
50 ASSOCIATED BANC-CORP N/A Feb 2026 23,936 NEW $666K 0.05% EC
51 ACI WORLDWIDE, INC. N/A Feb 2026 14,812 NEW $647K 0.05% EC
52 BATH & BODY WORKS, INC. N/A Feb 2026 32,100 NEW $643K 0.05% EC
53 BREAD FINANCIAL HOLDINGS, INC. N/A Feb 2026 7,000 NEW $623K 0.05% EC
54 Renasant Corporation N/A Feb 2026 15,160 NEW $617K 0.05% EC
55 AZZ INC. N/A Feb 2026 4,496 NEW $609K 0.05% EC
56 BROADSTONE NET LEASE, INC. N/A Feb 2026 29,800 NEW $603K 0.05% EC
57 BELDEN INC. N/A Feb 2026 5,623 NEW $591K 0.04% EC
58 BGC GROUP, INC. N/A Feb 2026 55,936 NEW $585K 0.04% EC
59 ASBURY AUTOMOTIVE GROUP, INC. N/A Feb 2026 3,098 NEW $582K 0.04% EC
60 AMENTUM HOLDINGS, INC. N/A Feb 2026 24,400 NEW $567K 0.04% EC
61 BADGER METER, INC. N/A Feb 2026 4,524 NEW $561K 0.04% EC
62 ABERCROMBIE & FITCH CO. N/A Feb 2026 7,000 NEW $541K 0.04% EC
63 VERSIGENT PLC G9600F104 May 2026 11,400 NEW $503K 0.04% EC
64 ACADIA REALTY TRUST N/A Feb 2026 21,539 NEW $474K 0.04% EC
65 AVIS BUDGET GROUP, INC. N/A Feb 2026 2,660 NEW $468K 0.04% EC
66 BANK OF HAWAII CORPORATION N/A Feb 2026 6,024 NEW $461K 0.04% EC
67 BILL HOLDINGS, INC. N/A Feb 2026 12,277 NEW $454K 0.03% EC
68 AMERICAN STATES WATER COMPANY N/A Feb 2026 5,774 NEW $446K 0.03% EC
69 ASHLAND INC. N/A Feb 2026 7,408 NEW $429K 0.03% EC
70 ACADIA PHARMACEUTICALS INC. N/A Feb 2026 19,100 NEW $414K 0.03% EC
71 BEL FUSE INC. N/A Feb 2026 1,500 NEW $412K 0.03% EC
72 ABM INDUSTRIES INCORPORATED N/A Feb 2026 10,455 NEW $408K 0.03% EC
73 ATKORE INC. N/A Feb 2026 4,900 NEW $406K 0.03% EC
74 AMERICAN EAGLE OUTFITTERS, INC. N/A Feb 2026 24,222 NEW $383K 0.03% EC
75 ACUSHNET HOLDINGS CORP. N/A Feb 2026 4,200 NEW $373K 0.03% EC
76 A10 NETWORKS, INC. N/A Feb 2026 12,200 NEW $368K 0.03% EC
77 THE ANDERSONS, INC N/A Feb 2026 5,199 NEW $367K 0.03% EC
78 BEACON FINANCIAL CORPORATION N/A Feb 2026 12,378 NEW $360K 0.03% EC
79 ALPHA METALLURGICAL RESOURCES, INC. N/A Feb 2026 1,800 NEW $358K 0.03% EC
80 AMERICAN SUPERCONDUCTOR CORPORATION N/A Feb 2026 7,000 NEW $357K 0.03% EC
81 NICOLET BANKSHARES, INC. N/A Feb 2026 2,506 NEW $352K 0.03% EC
82 ALARM.COM HOLDINGS, INC. N/A Feb 2026 7,600 NEW $343K 0.03% EC
83 ARMOUR RESIDENTIAL REIT, INC. N/A Feb 2026 19,084 NEW $327K 0.02% EC
84 NOVAGOLD RESOURCES INC. N/A Feb 2026 37,800 NEW $324K 0.02% EC
85 ALBANY INTERNATIONAL CORP. N/A Feb 2026 4,898 NEW $317K 0.02% EC
86 ATLANTA BRAVES HOLDINGS, INC. N/A Feb 2026 6,205 NEW $308K 0.02% EC
87 Progyny Inc N/A Feb 2026 11,700 NEW $299K 0.02% EC
88 BLUE BIRD CORPORATION N/A Feb 2026 4,192 NEW $284K 0.02% EC
89 IMAX CORPORATION N/A Feb 2026 7,000 NEW $278K 0.02% EC
90 ADMA BIOLOGICS, INC. N/A Feb 2026 34,600 NEW $276K 0.02% EC
91 ADDUS HOMECARE CORPORATION N/A Feb 2026 2,900 NEW $266K 0.02% EC
92 HCI GROUP, INC. N/A Feb 2026 1,715 NEW $264K 0.02% EC
93 TRIUMPH FINANCIAL, INC. N/A Feb 2026 3,600 NEW $256K 0.02% EC
94 Ardelyx Inc N/A Feb 2026 41,800 NEW $252K 0.02% EC
95 Alumis Inc N/A Feb 2026 11,588 NEW $250K 0.02% EC
96 ASTRONICS CORPORATION N/A Feb 2026 2,774 NEW $241K 0.02% EC
97 DAUCH CORPORATION N/A Feb 2026 34,898 NEW $232K 0.02% EC
98 ALAMO GROUP INC. N/A Feb 2026 1,535 NEW $231K 0.02% EC
99 AvePoint Inc N/A Feb 2026 20,900 NEW $228K 0.02% EC
100 SALLY BEAUTY HOLDINGS, INC. N/A Feb 2026 16,791 NEW $223K 0.02% EC
101 Allient Inc. N/A Feb 2026 2,650 NEW $210K 0.02% EC
102 ASTRONICS CORPORATION N/A Feb 2026 2,395 NEW $201K 0.02% EC
103 ASTEC INDUSTRIES, INC. N/A Feb 2026 3,963 NEW $200K 0.02% EC
104 Enliven Therapeutics Inc N/A Feb 2026 4,900 NEW $194K 0.01% EC
105 AMERESCO, INC. N/A Feb 2026 5,279 NEW $190K 0.01% EC
106 AMERICAN ASSETS TRUST, INC. N/A Feb 2026 7,791 NEW $182K 0.01% EC
107 AMN HEALTHCARE SERVICES, INC. N/A Feb 2026 5,809 NEW $168K 0.01% EC
108 Ambiq Micro Inc N/A Feb 2026 2,100 NEW $167K 0.01% EC
109 ARBOR REALTY TRUST, INC. N/A Feb 2026 28,600 NEW $164K 0.01% EC
110 XERIS BIOPHARMA HOLDINGS, INC. N/A Feb 2026 26,300 NEW $162K 0.01% EC
111 AGILON HEALTH, INC. 00857U206 May 2026 1,716 NEW $158K 0.01% EC
112 ENACT HOLDINGS, INC. N/A Feb 2026 3,700 NEW $155K 0.01% EC
113 Brookfield Business Holdings Corp 113006100 May 2026 4,600 NEW $151K 0.01% EC
114 THE PENNANT GROUP, INC. N/A Feb 2026 4,268 NEW $146K 0.01% EC
115 NCR VOYIX CORPORATION N/A Feb 2026 19,983 NEW $144K 0.01% EC
116 Cardinal Infrastructure Group Inc 14154A102 May 2026 2,700 NEW $140K 0.01% EC
117 AnaptysBio Inc N/A Feb 2026 2,500 NEW $139K 0.01% EC
118 York Space Systems Inc 987084100 May 2026 4,000 NEW $131K 0.01% EC
119 AMALGAMATED FINANCIAL CORP. N/A Feb 2026 3,000 NEW $124K 0.01% EC
120 ARROW FINANCIAL CORPORATION N/A Feb 2026 3,349 NEW $123K 0.01% EC
121 BETA Technologies Inc N/A Feb 2026 6,700 NEW $123K 0.01% EC
122 Jade Biosciences Inc N/A Feb 2026 5,563 NEW $117K 0.01% EC
123 CENTRAL BANCOMPANY, INC. 152413100 May 2026 4,100 NEW $116K 0.01% EC
124 AMERANT BANCORP INC. N/A Feb 2026 5,100 NEW $116K 0.01% EC
125 APOGEE ENTERPRISES, INC. N/A Feb 2026 2,911 NEW $112K 0.01% EC
126 CARS.COM INC. N/A Feb 2026 10,800 NEW $111K 0.01% EC
127 ARKO CORP. N/A Feb 2026 14,200 NEW $110K 0.01% EC
128 BLOOMIN' BRANDS, INC. N/A Feb 2026 12,950 NEW $109K 0.01% EC
129 GCM GROSVENOR INC. N/A Feb 2026 10,100 NEW $107K 0.01% EC
130 BARRETT BUSINESS SERVICES, INC. N/A Feb 2026 3,236 NEW $105K 0.01% EC
131 ACNB CORPORATION N/A Feb 2026 1,900 NEW $103K 0.01% EC
132 HOME BANCORP, INC. N/A Feb 2026 1,600 NEW $103K 0.01% EC
133 Wealthfront Corp 947002101 May 2026 8,300 NEW $101K 0.01% EC
134 BAR HARBOR BANKSHARES N/A Feb 2026 2,850 NEW $100K 0.01% EC
135 BEL FUSE INC. N/A Feb 2026 400 NEW $98K 0.01% EC
136 ATLANTA BRAVES HOLDINGS, INC. N/A Feb 2026 1,803 NEW $97K 0.01% EC
137 BANK OF MARIN BANCORP N/A Feb 2026 3,614 NEW $93K 0.01% EC
138 Aktis Oncology Inc 01021M104 May 2026 4,500 NEW $93K 0.01% EC
139 Bicara Therapeutics Inc N/A Feb 2026 4,100 NEW $89K 0.01% EC
140 Absci Corp N/A Feb 2026 13,100 NEW $88K 0.01% EC
141 GLOBAL INDUSTRIAL COMPANY N/A Feb 2026 2,900 NEW $88K 0.01% EC
142 INVESTAR HOLDING CORPORATION 46134L105 May 2026 2,900 NEW $82K 0.01% EC
143 Evommune Inc 30054Y107 May 2026 3,500 NEW $81K 0.01% EC
144 Strata Critical Medical Inc N/A Feb 2026 12,600 NEW $80K 0.01% EC
145 JEFFERSON CAPITAL, INC. 47248R103 May 2026 4,600 NEW $78K 0.01% EC
146 AMES NATIONAL CORPORATION N/A Feb 2026 2,700 NEW $78K 0.01% EC
147 ALPINE INCOME PROPERTY TRUST, INC. 02083X103 May 2026 4,000 NEW $77K 0.01% EC
148 4D Molecular Therapeutics Inc N/A Feb 2026 7,700 NEW $76K 0.01% EC
149 Dakota Gold Corp N/A Feb 2026 12,800 NEW $74K 0.01% EC
150 Solid Biosciences Inc N/A Feb 2026 9,800 NEW $72K 0.01% EC
151 ThredUp Inc N/A Feb 2026 14,000 NEW $65K 0.00% EC
152 BEYOND MEAT, INC. N/A Feb 2026 81,900 NEW $65K 0.00% EC
153 AQUESTIVE THERAPEUTICS, INC. N/A Feb 2026 15,400 NEW $62K 0.00% EC
154 ALICO, INC. N/A Feb 2026 1,400 NEW $57K 0.00% EC
155 U-Haul Holding Company N/A Feb 2026 900 NEW $52K 0.00% EC
156 BLUE RIDGE BANKSHARES, INC. N/A Feb 2026 14,100 NEW $47K 0.00% EC
157 Anavex Life Sciences Corp N/A Feb 2026 15,300 NEW $46K 0.00% EC
158 ALEXANDER'S, INC. N/A Feb 2026 188 NEW $46K 0.00% EC
159 UNIVERSAL HEALTH REALTY INCOME TRUST N/A Feb 2026 1,116 NEW $46K 0.00% EC
160 Lumexa Imaging Holdings Inc 550249106 May 2026 5,800 NEW $45K 0.00% EC
161 ANIKA THERAPEUTICS, INC. N/A Feb 2026 3,070 NEW $45K 0.00% EC
162 Allogene Therapeutics Inc N/A Feb 2026 20,200 NEW $44K 0.00% EC
163 OCTAVE SPECIALTY GROUP, INC. N/A Feb 2026 7,800 NEW $43K 0.00% EC
164 DIGIMARC LLC 25382K100 May 2026 2,876 NEW $42K 0.00% EC
165 FUBOTV INC. 35953D401 May 2026 4,042 NEW $41K 0.00% EC
166 First Tracks Biotherapeutics Inc 337185102 May 2026 2,500 NEW $40K 0.00% EC
167 BRT APARTMENTS CORP. N/A Feb 2026 2,400 NEW $35K 0.00% EC
168 BCB BANCORP, INC. N/A Feb 2026 3,200 NEW $33K 0.00% EC
169 Black Rock Coffee Bar Inc N/A Feb 2026 3,600 NEW $30K 0.00% EC
170 ADVANTAGE SOLUTIONS INC. 00791N201 May 2026 756 NEW $28K 0.00% EC
171 Alector Inc N/A Feb 2026 13,000 NEW $28K 0.00% EC
172 AMERICAN VANGUARD CORPORATION N/A Feb 2026 6,799 NEW $18K 0.00% EC
173 PRIMEENERGY RESOURCES CORPORATION N/A Feb 2026 100 NEW $16K 0.00% EC
174 Blaize Holdings Inc N/A Feb 2026 7,800 NEW $14K 0.00% EC
175 Bark Inc N/A Feb 2026 1,310 NEW $13K 0.00% EC
176 SKYX Platforms Corp N/A Feb 2026 7,700 NEW $9K 0.00% EC
177 AIRO Group Holdings Inc N/A Feb 2026 900 NEW $8K 0.00% EC
178 Airship AI Holdings Inc N/A Feb 2026 2,500 NEW $8K 0.00% EC
179 AirSculpt Technologies Inc N/A Feb 2026 1,400 NEW $8K 0.00% EC
180 ATYR PHARMA, INC. N/A Feb 2026 13,000 NEW $7K 0.00% EC
181 ACCURAY INCORPORATED N/A Feb 2026 18,400 NEW $7K 0.00% EC
182 Definitive Healthcare Corp N/A Feb 2026 7,300 NEW $7K 0.00% EC
183 N/A 2600057D D Feb 2026 10,400 NEW $7K 0.00% EC
184 TRAEGER, INC. 89269P202 May 2026 96 NEW $7K 0.00% EC
185 FRONTVIEW REIT, INC. 35922N100 May 2026 300 NEW $5K 0.00% EC
186 N/A N/A Feb 2026 10,960 NEW $4K 0.00% EC
187 Aardvark Therapeutics Inc N/A Feb 2026 800 NEW $3K 0.00% EC
188 THE ARENA GROUP HOLDINGS, INC. N/A Feb 2026 2,200 NEW $3K 0.00% EC
189 N/A 14179K101 May 2026 17,400 NEW $0 0.00% EC