Ownership Summary

Top Holders

Holder Shares Held % O/S Share Change Filing Date
William Blair Investment Management, LLC 927,455 7.83 59,000 3/31/21
Dimensional Fund Advisors, L.P. 925,690 7.81 -22,206 3/31/21
BlackRock Institutional Trust Company, N.A. 753,451 6.36 44,905 3/31/21
RBC Global Asset Management (U.S.) Inc. 714,273 6.03 26,440 3/31/21
Paradigm Capital Management, Inc. 699,615 5.90 24,300 3/31/21
Ducommun (Robert C) 570,409 4.81 -1,500 6/23/21
The Vanguard Group, Inc. 552,500 4.66 -9,197 3/31/21
Goldman Sachs Asset Management, L.P. 465,219 3.93 -13,469 3/31/21
Gabelli Funds, LLC 397,176 3.35 -8,560 3/31/21
Wellington Management Company, LLP 353,565 2.98 -19,299 3/31/21

Top Holders: Mutual Funds

Fund Shares Held % O/S Share Change Filing Date
Vanguard Total Stock Market Index Fund 303,947 2.57 -12,968 6/30/21
DFA U.S. Small Cap Value Portfolio 293,613 2.48 1,900 4/30/21
William Blair Small Cap Growth Fund 266,059 2.25 -- 5/31/21
iShares Russell 2000 ETF 259,957 2.19 -1,351 6/30/21
Goldman Sachs Small Cap Value Fund 232,272 1.96 -24,956 6/30/21
TETON Westwood Mighty Mites Fund 180,540 1.52 -1,500 3/31/21
Royce Opportunity Fund 172,286 1.45 46,000 6/30/21
Vanguard Extended Market Index Fund 159,857 1.35 2,852 6/30/21
SPDR S&P Aerospace & Defense ETF 139,175 1.17 32,831 6/30/21
DWS Small Cap Growth Fund 137,531 1.16 -- 5/31/21

* Insider values reflect direct beneficial ownership.

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