Majority foreign-owned companies cannot own land in Eswatini even if for business purposes. However, long-term leases (99 years) are possible according to the authorities. Foreign investors and foreign-owned companies are allowed to acquire condominium units without restrictions as per the Sectional Titles Act 2003 [according to the authorities]. 
"Land
211. (1) From the date of commencement of this Constitution, all land (including any existing concessions) in Swaziland, save privately held title-deed land, shall continue to vest in iNgwenyama in trust for the Swazi Nation as it vested on the 12th April, 1973.
(2) Save as may be required by the exigencies of any particular situation, a citizen of Swaziland, without regard to gender, shall have equal access to land for normal domestic purposes."[...]
(4) Subect to subsection (5), all agreements the effect of which is to vest ownership in land in Swaziland in a non-citizen or a company the majority of whose share-holders are not citizens shall be of no force and effect unless that agreement was made prior to the commencement of this Constitution.
(5) A provision of this chapter may not be used to undermine or frustrate an existing or new legitimate business undertaking of which land is a significant factor or base.[...]" (CONSTITUTION OF THE KINGDOM OF SWAZILAND ACT, 2005)
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"Interpretation
2. In this Act, unless the context otherwise requires-[...]
"land concession" shall mean any concession confirmed by the Chid' Court (other rhan a mineral concession) which confers any ritle or right (not being a right included in section 4 of the Concessions Act No. 3 or 1904) to land Of the use thereof for agricultural or other purposes;
"later land concession' shall mean a land concession of subsequent uarc to a prior land COi1CCSSil'n, but conferring rights similar to those and over the same area, or a portion or the same area as that, covered by and exercisable only after the expiry of, the rights granted under such prior land concession;
"mineral concession" shall mean a concession confirmed by the Chief Court, conferring a right (not bing a right included in section 4 of the Concessions Act No. 3 of 1904) to mine, dig, search or otherwise explore for precious or base metals, or coal, or for precious stones, or in the case of any such concession which confers any such right in addition to any other rights, such concession in as far as it relates to such right;
[...]
issue offreehold title.
5. If a concessionaire has under a land concession been granted - (a) title to the ownership of land; or (b) a lease of land which, with or without rights of renewal, is of not less than ninety-nine years' duration, there shall be issued to such concessionaire freehold title in respect of any portion of land held under such title or lease, not demarcated, selected or transferred as aforesaid, subject to such leasesand servitudes as may be determined by the Commission under the provisions of the Concessions Act, No.3 of 1904 and to such other servitudes as may have been awarded by the Special Commissioner, and further subject to such mortgage bonds, leases or other encumbrances as are at the date of issue of such freehold tule registered against such concession. (Amended P.41! 1962) [This section must be read in conjunction with King's Order-in-Council No. I5 of 1973. Land Concession Order)[...]" (Concessions Partitions Act 1907 (No. 28 of 1907)0.
CONSTITUTION OF THE KINGDOM OF SWAZILAND ACT, 2005
Concessions Partitions Act 1907 (No. 28 of 1907).
[<a href="http://extwprlegs1.fao.org/docs/pdf/swa132849.pdf">Constitution</a>]