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Mr. Sloss disclaims any beneficial ownership of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the \"Exchange Act\"), except to the extent of its pecuniary interest therein."}],"balance_after":1004747,"source":{"system":"sec-edgar","filing":"0001062993-22-004666","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1875411/000106299322004666/form4.xml","form_type":"4"}},{"id":2392892,"issuer":{"id":6834,"kind":"organization","name":"Momentus Inc."},"owners":[{"id":109449,"kind":"organization","name":"Prime Movers Lab Fund I LP","position":1,"cik":"0001751631","reported_name":"Prime Movers Lab Fund I LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109451,"kind":"organization","name":"Prime Movers Growth Fund I LP","position":2,"cik":"0001838981","reported_name":"Prime Movers Growth Fund I LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109450,"kind":"person","name":"Sloss Dakin","position":3,"cik":"0001875411","reported_name":"Sloss Dakin","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2022-02-16T21:54:22.000Z","date":"2022-02-14","kind":"sale","acquired":false,"shares":86639,"price":3.3661,"value":291635.5379,"ownership":{"direct":false,"nature":"Held by Momentus PML SPV 1 LP"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price of $3.3661 per share represents a weighted average of purchase prices ranging from $3.00 to $3.61 per share. The reporting person undertakes to provide upon request by the Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Held by Momentus PML SPV 1 LP (\"PML SPV 1\"). PML GP is the general partner of PML SPV 1."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"Dakin Sloss is the manager of PML GP, PML GP II and PM Growth GP, and may be deemed to beneficially own the securities held by PML, PML SPV 1, PML SPV 2, PML SPV 3 and PM Growth. Mr. Sloss disclaims any beneficial ownership of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the \"Exchange Act\"), except to the extent of its pecuniary interest therein."}],"balance_after":6286561,"source":{"system":"sec-edgar","filing":"0001062993-22-004666","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1875411/000106299322004666/form4.xml","form_type":"4"}},{"id":2392891,"issuer":{"id":6834,"kind":"organization","name":"Momentus Inc."},"owners":[{"id":109449,"kind":"organization","name":"Prime Movers Lab Fund I LP","position":1,"cik":"0001751631","reported_name":"Prime Movers Lab Fund I LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109451,"kind":"organization","name":"Prime Movers Growth Fund I LP","position":2,"cik":"0001838981","reported_name":"Prime Movers Growth Fund I LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":109450,"kind":"person","name":"Sloss Dakin","position":3,"cik":"0001875411","reported_name":"Sloss Dakin","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2022-02-16T21:54:22.000Z","date":"2022-02-14","kind":"sale","acquired":false,"shares":218575,"price":3.3661,"value":735745.3075,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price of $3.3661 per share represents a weighted average of purchase prices ranging from $3.00 to $3.61 per share. The reporting person undertakes to provide upon request by the Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F10","text":"Amount includes 172,863 shares inadvertently omitted from the prior Form 4 due to a clerical error."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"Held by Prime Movers Lab Fund I LP (\"PML\"). Prime Movers Lab GP I LLC (\"PML GP\") is the general partner of PML."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"Dakin Sloss is the manager of PML GP, PML GP II and PM Growth GP, and may be deemed to beneficially own the securities held by PML, PML SPV 1, PML SPV 2, PML SPV 3 and PM Growth. Mr. Sloss disclaims any beneficial ownership of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the \"Exchange Act\"), except to the extent of its pecuniary interest therein."}],"balance_after":15859885,"source":{"system":"sec-edgar","filing":"0001062993-22-004666","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1875411/000106299322004666/form4.xml","form_type":"4"}}]}