Elon Musk plans to rely more heavily on equity to finance his $44 billion deal for Twitter Inc. TWTR, +3.91%  amid a sharp decline in Tesla Inc.  TSLA, +4.88% stock in recent weeks.

Musk’s funding plan now includes $33.5 billion in equity, up from $27.25 billion, according to a Wednesday regulatory filing. He no longer plans to rely on a margin loan backed by Tesla shares, which are down by about a third since he struck a deal with Twitter in late April.