** Shares of defense contractor Lockheed Martin LMT.N fall 5.5% to $525.17 premarket
** Company cites high costs and production slowdown on some programs for lower Q1 profit
** LMT's aeronautics unit profit weighed down by delays in F-16 and C-130 aircraft
** Q1 sales in rotary and mission systems business down 8%
** Company grappling with inflationary cost pressures, tariffs and increased expenses on fixed-price programs negotiated years ago
** Posts Q1 profit of $6.44 per share, compared with $7.28 a year earlier
** Median price target of 25 analysts covering the stock is $665.00, while their average recommendation is "hold" - data compiled by LSEG
** As of last close, LMT shares up 14.8% this year, outperforming a 4.3% rise in S&P 500 .SPX index
(Reporting by Utkarsh Tushar Hathi)
((utkarshtushar.hathi@thomsonreuters.com))