WLDN · Willdan Group, Inc. · Shareholders & Ownership

$72.72 -0.85 (-1.16%)

Russell 2000 member Rebalance outlook locked

Market Cap

$1.13B

15.23M

Volume · Oct 20 99.48K Avg daily vol (3M) 221.19K

Every disclosed holder of WLDN in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns WLDN

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	243	13,549,558	88.95%	Yes
Insiders (Forms 3, 4, 5)	9	570,078	3.74%	Yes
13D/G-only blocks	1	486,354	3.19%	Yes
Remaining	—	626,101	4.11%	Rest
Registered funds (N-PORT, not summed)	244	4,823,121	31.66%	No

Shares outstanding: 15,232,091, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of WLDN

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,438,623	9.44%	+120,899	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	BlackRock, Inc. 13G CIK 2012383 · Holding company · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	1,209,993	7.94%	+296,078	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
1.2	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	381,500	2.50%	+37,362	Jun 30, 2026	iShares Trust, not summed
1.3	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	101,169	0.66%	+22,060	Jun 30, 2026	iShares Trust, not summed
1.4	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	49,110	0.32%	+13,682	Jun 30, 2026	iShares Trust, not summed
1.5	BlackRock Advantage Small Cap Core Fund Fund S000039982 · Registered fund · May 29, 2026 BlackRock Funds, not summed	37,706	0.25%	-472	May 29, 2026	BlackRock Funds, not summed
2	Divisadero Street Capital Management, LP 13F CIK 1901865 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,324,293	8.69%	+1,159,306	Jun 30, 2026	carried, not yet filed for the newest quarter
3	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	632,916	4.16%	+19,589	Jun 30, 2026	carried, not yet filed for the newest quarter
4	NEUMEIER POMA INVESTMENT COUNSEL LLC 13F CIK 1044936 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	530,210	3.48%	+314,550	Jun 30, 2026	carried, not yet filed for the newest quarter
5	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	527,252	3.46%	+42,071	Jun 30, 2026	carried, not yet filed for the newest quarter
6	Forager Fund, L.P. 13G CIK 1539281 · Unknown · Sep 30, 2024 Rule 13d-1(c), passive investor	486,354	3.19%	-780,813	Sep 30, 2024	Rule 13d-1(c), passive investor
7	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	452,947	2.97%	+10,300	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
8	Allspring Global Investments Holdings, LLC 13F CIK 1890906 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	390,720	2.57%	+174,291	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	Allspring SMID Core ETF Fund S000093515 · Registered fund · Jun 30, 2026 ALLSPRING EXCHANGE-TRADED FUNDS TRUST, not summed	24,089	0.16%	+12,642	Jun 30, 2026	ALLSPRING EXCHANGE-TRADED FUNDS TRUST, not summed
8.2	Allspring Disciplined Small Cap Fund Fund S000007342 · Registered fund · Jun 30, 2026 ALLSPRING FUNDS TRUST, not summed	5,789	0.04%	+380	Jun 30, 2026	ALLSPRING FUNDS TRUST, not summed
8.3	Allspring Small Company Value Portfolio Fund S000007553 · Registered fund · Jul 31, 2026 ALLSPRING MASTER TRUST, not summed	981	0.01%	—	Jul 31, 2026	ALLSPRING MASTER TRUST, not summed
9	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	383,399	2.52%	+29,107	Jun 30, 2026	carried, not yet filed for the newest quarter
10	FIRST TRUST ADVISORS LP 13F CIK 1125816 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	361,079	2.37%	+74,221	Jun 30, 2026	carried, not yet filed for the newest quarter
10.1	First Trust Small Cap Growth AlphaDEX Fund Fund S000031806 · Registered fund · Jul 31, 2026 First Trust Exchange-Traded AlphaDEX Fund, not summed	44,381	0.29%	-514	Jul 31, 2026	First Trust Exchange-Traded AlphaDEX Fund, not summed
10.2	First Trust NASDAQ Clean Edge Green Energy Index Fund Fund S000015169 · Registered fund · Jun 30, 2026 First Trust Exchange-Traded Fund, not summed	37,426	0.25%	+6,164	Jun 30, 2026	First Trust Exchange-Traded Fund, not summed
10.3	First Trust Small Cap Core AlphaDEX Fund Fund S000017339 · Registered fund · Jul 31, 2026 First Trust Exchange-Traded AlphaDEX Fund, not summed	11,028	0.07%	-7,060	Jul 31, 2026	First Trust Exchange-Traded AlphaDEX Fund, not summed
10.4	First Trust Multi Cap Growth AlphaDEX Fund Fund S000017343 · Registered fund · Jul 31, 2026 First Trust Exchange-Traded AlphaDEX Fund, not summed	4,021	0.03%	-167	Jul 31, 2026	First Trust Exchange-Traded AlphaDEX Fund, not summed
10.5	First Trust Active Factor Small Cap ETF Fund S000066790 · Registered fund · May 31, 2026 First Trust Exchange-Traded Fund VIII, not summed	3,992	0.03%	-361	May 31, 2026	First Trust Exchange-Traded Fund VIII, not summed
11	ALTA FOX CAPITAL MANAGEMENT, LLC 13F CIK 1858353 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	359,806	2.36%	+359,806	Jun 30, 2026	carried, not yet filed for the newest quarter
12	WASATCH ADVISORS LP 13F CIK 814133 · Registered investment adviser · Sep 30, 2026	357,084	2.34%	+70,030	Sep 30, 2026
12.1	Wasatch Micro Cap Fund Fund S000000885 · Registered fund · Jun 30, 2026 WASATCH FUNDS TRUST, not summed	143,436	0.94%	-55,298	Jun 30, 2026	WASATCH FUNDS TRUST, not summed
12.2	Wasatch Micro Cap Value Fund Fund S000000886 · Registered fund · Jun 30, 2026 WASATCH FUNDS TRUST, not summed	79,598	0.52%	-19,020	Jun 30, 2026	WASATCH FUNDS TRUST, not summed
13	Swedbank AB 13F CIK 946431 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	349,700	2.30%	+113,000	Jun 30, 2026	carried, not yet filed for the newest quarter
14	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	337,449	2.22%	+22,749	Jun 30, 2026	carried, not yet filed for the newest quarter
14.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	4,871	0.03%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
14.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	370	0.00%	+40	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
14.3	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	80	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
15	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	320,857	2.11%	+11,910	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	55,140	0.36%	+3,958	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
15.2	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	50,705	0.33%	+1,479	Jul 31, 2026	Dimensional ETF Trust, not summed
15.3	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	49,534	0.33%	+731	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
15.4	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	32,045	0.21%	-136	Jul 31, 2026	Dimensional ETF Trust, not summed
15.5	U.S. CORE EQUITY 2 PORTFOLIO Fund S000000980 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	19,610	0.13%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
16	Conversant Capital LLC 13F CIK 1850901 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	294,500	1.93%	+294,500	Jun 30, 2026	carried, not yet filed for the newest quarter
17	Ranger Investment Management, L.P. 13F CIK 1319691 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	275,191	1.81%	+228,756	Jun 30, 2026	carried, not yet filed for the newest quarter
17.1	Ranger Micro Cap Fund Fund S000033850 · Registered fund · Jul 31, 2026 SPEND LIFE WISELY FUNDS INVESTMENT TRUST, not summed	3,410	0.02%	+1,765	Jul 31, 2026	SPEND LIFE WISELY FUNDS INVESTMENT TRUST, not summed
17.2	Ranger Small Cap Fund Fund S000033849 · Registered fund · Jul 31, 2026 SPEND LIFE WISELY FUNDS INVESTMENT TRUST, not summed	2,290	0.02%	—	Jul 31, 2026	SPEND LIFE WISELY FUNDS INVESTMENT TRUST, not summed
18	OBERWEIS ASSET MANAGEMENT INC/ 13F CIK 937886 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	262,700	1.72%	+262,700	Jun 30, 2026	carried, not yet filed for the newest quarter
18.1	Oberweis Micro-Cap Fund Fund S000010231 · Registered fund · Jun 30, 2026 OBERWEIS FUNDS, not summed	253,700	1.67%	—	Jun 30, 2026	OBERWEIS FUNDS, not summed
19	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	260,471	1.71%	-11,883	Jun 30, 2026	carried, not yet filed for the newest quarter
19.1	Columbia Acorn Fund Fund S000009184 · Registered fund · Jun 30, 2026 COLUMBIA ACORN TRUST, not summed	206,119	1.35%	0	Jun 30, 2026	COLUMBIA ACORN TRUST, not summed
19.2	Columbia Variable Portfolio - Acorn Fund Fund S000008981 · Registered fund · Jun 30, 2026 COLUMBIA FUNDS VARIABLE SERIES TRUST, not summed	39,727	0.26%	0	Jun 30, 2026	COLUMBIA FUNDS VARIABLE SERIES TRUST, not summed
19.3	Columbia Research Enhanced Small Cap ETF Fund S000095313 · Registered fund · Jun 30, 2026 Columbia ETF Trust I, not summed	24	0.00%	0	Jun 30, 2026	Columbia ETF Trust I, not summed
20	BIEBER MICHAEL A Insider CIK 1270606 · May 14, 2026 Director, PRESIDENT AND CEO, issuer-wide	249,525	1.64%	0	May 14, 2026	Director, PRESIDENT AND CEO, issuer-wide
21	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	210,895	1.38%	+210,895	Jun 30, 2026	carried, not yet filed for the newest quarter
22	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	210,771	1.38%	-31,720	Jun 30, 2026	carried, not yet filed for the newest quarter
22.1	Nuveen Quant Small Cap Equity Fund Fund S000005386 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	102,300	0.67%	+19,180	Jul 31, 2026	TIAA-CREF Funds, not summed
22.2	Nuveen Small Cap Value Fund Fund S000005570 · Registered fund · Jul 31, 2026 Nuveen Investment Funds, Inc., not summed	38,586	0.25%	0	Jul 31, 2026	Nuveen Investment Funds, Inc., not summed
22.3	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	19,364	0.13%	+2,833	Jul 31, 2026	TIAA-CREF Funds, not summed
22.4	Nuveen ESG Small-Cap ETF Fund S000055815 · Registered fund · Jul 31, 2026 NuShares ETF Trust, not summed	14,258	0.09%	-1,189	Jul 31, 2026	NuShares ETF Trust, not summed
22.5	College Retirement Equities Fund - Total Global Stock Account Fund S000005080 · Registered fund · Jun 30, 2026 College Retirement Equities Fund, not summed	9,239	0.06%	-65,520	Jun 30, 2026	College Retirement Equities Fund, not summed
23	First Trust NASDAQ Clean Edge Smart Grid Infrastructure Index Fund Fund S000026919 · Registered fund · Jun 30, 2026 First Trust Exchange-Traded Fund II, not summed	192,974	1.27%	+64,157	Jun 30, 2026	First Trust Exchange-Traded Fund II, not summed
24	Handelsbanken Fonder AB 13F CIK 1398318 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	191,532	1.26%	+48,876	Jun 30, 2026	carried, not yet filed for the newest quarter
25	RBF Capital, LLC 13F CIK 1134621 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	184,600	1.21%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
26	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	165,797	1.09%	+9,862	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
27	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	163,347	1.07%	+14,238	Jun 30, 2026	carried, not yet filed for the newest quarter
27.1	Small Cap Value Fund Fund S000001246 · Registered fund · Jun 30, 2026 Northern Funds, not summed	12,954	0.09%	0	Jun 30, 2026	Northern Funds, not summed
27.2	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	7,414	0.05%	+990	Jun 30, 2026	Northern Funds, not summed
27.3	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	1,823	0.01%	-52	Jun 30, 2026	Northern Funds, not summed
28	NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 13F CIK 921739 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	163,117	1.07%	+91,836	Jun 30, 2026	carried, not yet filed for the newest quarter
28.1	Nomura Small Cap Growth Fund Fund S000006286 · Registered fund · Jun 30, 2026 IVY FUNDS, not summed	110,093	0.72%	+67,088	Jun 30, 2026	IVY FUNDS, not summed
28.2	Nomura VIP Small Cap Growth Series Fund S000006233 · Registered fund · Jun 30, 2026 Ivy Variable Insurance Portfolios, not summed	21,529	0.14%	+10,257	Jun 30, 2026	Ivy Variable Insurance Portfolios, not summed
29	VANGUARD STRATEGIC EQUITY FUND Fund S000002593 · Registered fund · Jun 30, 2026 VANGUARD HORIZON FUNDS, not summed	156,072	1.02%	+46,087	Jun 30, 2026	VANGUARD HORIZON FUNDS, not summed
30	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	155,269	1.02%	+25,416	Jun 30, 2026	carried, not yet filed for the newest quarter
30.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust, not summed	14,076	0.09%	+189	May 31, 2026	Goldman Sachs ETF Trust, not summed
30.2	Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund Fund S000009355 · Registered fund · Jun 30, 2026 Goldman Sachs Variable Insurance Trust, not summed	3,655	0.02%	—	Jun 30, 2026	Goldman Sachs Variable Insurance Trust, not summed
30.3	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Jun 30, 2026 GOLDMAN SACHS TRUST, not summed	2,417	0.02%	+896	Jun 30, 2026	GOLDMAN SACHS TRUST, not summed
31	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	150,574	0.99%	-317,448	Jun 30, 2026	carried, not yet filed for the newest quarter
32	Russell Investments Group, Ltd. 13F CIK 1692234 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	143,866	0.94%	+49,468	Jun 30, 2026	carried, not yet filed for the newest quarter
32.1	U.S. Small Cap Equity Fund Fund S000001586 · Registered fund · Jul 31, 2026 RUSSELL INVESTMENT CO, not summed	35,057	0.23%	+21,663	Jul 31, 2026	RUSSELL INVESTMENT CO, not summed
32.2	Tax-Managed U.S. Mid & Small Cap Fund Fund S000001571 · Registered fund · Jul 31, 2026 RUSSELL INVESTMENT CO, not summed	32,255	0.21%	-4,022	Jul 31, 2026	RUSSELL INVESTMENT CO, not summed
32.3	U.S. Small Cap Equity Fund Fund S000006864 · Registered fund · Jun 30, 2026 RUSSELL INVESTMENT FUNDS, not summed	8,524	0.06%	+5,686	Jun 30, 2026	RUSSELL INVESTMENT FUNDS, not summed
33	NEXT CENTURY GROWTH INVESTORS LLC 13F CIK 1134007 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	126,407	0.83%	+126,407	Jun 30, 2026	carried, not yet filed for the newest quarter
34	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	120,143	0.79%	-2,623	Jun 30, 2026	carried, not yet filed for the newest quarter
34.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	66,756	0.44%	-837	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
34.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	35,656	0.23%	+4,871	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
34.3	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	8,879	0.06%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
34.4	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	7,978	0.05%	0	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
35	Brisbin Thomas Donald Insider CIK 1395188 · Sep 16, 2026 Director, issuer-wide	119,322	0.78%	+22,635	Sep 16, 2026	Director, issuer-wide
36	PANAGORA ASSET MANAGEMENT INC 13F CIK 883677 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	114,701	0.75%	+53,470	Jun 30, 2026	carried, not yet filed for the newest quarter
37	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	111,204	0.73%	-10,593	Jun 30, 2026	carried, not yet filed for the newest quarter
37.1	E*TRADE No Fee Total Market Index Fund Fund S000090722 · Registered fund · Jul 31, 2026 E Trade Trust, not summed	70	0.00%	0	Jul 31, 2026	E Trade Trust, not summed
38	Point72 Asset Management, L.P. 13F CIK 1603466 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	108,675	0.71%	+30,254	Jun 30, 2026	carried, not yet filed for the newest quarter
39	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	100,690	0.66%	+4,936	Jun 30, 2026	carried, not yet filed for the newest quarter
40	VANGUARD EXPLORER FUND Fund S000002578 · Registered fund · Jul 31, 2026 VANGUARD EXPLORER FUND, not summed	99,961	0.66%	-38,623	Jul 31, 2026	VANGUARD EXPLORER FUND, not summed
41	LORD, ABBETT & CO. LLC 13F CIK 728100 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	98,913	0.65%	+22,448	Jun 30, 2026	carried, not yet filed for the newest quarter
41.1	Lord Abbett Micro-Cap Growth Fund Fund S000007142 · Registered fund · Jul 31, 2026 LORD ABBETT SECURITIES TRUST, not summed	27,362	0.18%	+5,563	Jul 31, 2026	LORD ABBETT SECURITIES TRUST, not summed
42	KENNEDY CAPITAL MANAGEMENT LLC 13F CIK 884589 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	97,391	0.64%	+13,840	Jun 30, 2026	carried, not yet filed for the newest quarter
42.1	Kennedy Capital Small Cap Growth Fund Fund S000076117 · Registered fund · Jun 30, 2026 INVESTMENT MANAGERS SERIES TRUST II, not summed	97	0.00%	+40	Jun 30, 2026	INVESTMENT MANAGERS SERIES TRUST II, not summed
43	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	96,854	0.64%	+54,153	Jun 30, 2026	carried, not yet filed for the newest quarter
44	VANGUARD STRATEGIC SMALL-CAP EQUITY FUND Fund S000012432 · Registered fund · Jun 30, 2026 VANGUARD HORIZON FUNDS, not summed	93,884	0.62%	+29,263	Jun 30, 2026	VANGUARD HORIZON FUNDS, not summed
45	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	89,929	0.59%	-52,643	Jun 30, 2026	carried, not yet filed for the newest quarter
46	Portolan Capital Management, LLC 13F CIK 1350290 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	84,394	0.55%	-9,570	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Summit Creek Advisors LLC 13F CIK 1333709 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	83,463	0.55%	-64,073	Jun 30, 2026	carried, not yet filed for the newest quarter
48	EARLY CREIGHTON K Insider CIK 904702 · Mar 25, 2026 EXECUTIVE VP AND CFO, issuer-wide	78,664	0.52%	+1,638	Mar 25, 2026	EXECUTIVE VP AND CFO, issuer-wide
49	Asset Management One Co., Ltd. 13F CIK 1068855 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	77,293	0.51%	+17,163	Jun 30, 2026	carried, not yet filed for the newest quarter
50	ESSEX INVESTMENT MANAGEMENT CO LLC 13F CIK 201772 · Registered investment adviser · Sep 30, 2026	72,557	0.48%	-2,333	Sep 30, 2026

33 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

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Key facts CIK 1370450 CUSIP 96924N100 13F (30d) 23 filings 23 filers Visit website Investor relations