Filed February 8, 2021 (signed February 4), this Amendment No. 1 to Schedule 13G under Rule 13d-1(c) discloses updated holdings in Vector Acquisition Corp.'s Class A Ordinary Shares (CUSIP G9442R100) as of December 31, 2020, amending the original filing from October 5, 2020. Reporting persons are Linden Capital L.P. (Bermuda LP), Linden GP LLC (Delaware LLC, GP), Linden Advisors LP (Delaware LP, investment advisor), and Siu Min Wong (individual, ultimate control). Linden Advisors and Wong beneficially own 1,980,325 shares (6.6% of 30M outstanding per 10-Q), comprising 1,771,354 shares in Linden Capital and 208,971 in managed accounts. All report shared voting/dispositive power, no sole power. Certification confirms passive investment, not for control or influence. Vector was the SPAC that de-SPACed Rocket Lab in 2021, so this stake likely converted post-merger, signaling pre-merger hedge fund confidence.

For Rocket Lab (RKLB) investors, this reflects hedge fund Linden Advisors' significant passive 6.6% stake in the pre-merger SPAC, indicating institutional backing ahead of the 2021 de-SPAC. Near-term neutral as passive with no activism; strategically positive for pre-merger valuation confidence. Monitor future 13D/G amendments or Form 4s for sales or shifts to active stance.