Principal Diversified Select Real Asset Fund
Supplement dated September 20, 2021
to the Prospectus dated August 1, 2021
This supplement updates information currently in the Prospectus. Please retain this supplement for future reference.
FEE TABLE AND SUMMARY
Delete the Investment Strategies sections and replace with the following:
Investment Strategies
Under normal circumstances, the Fund invests at least 80% of its net assets, plus any borrowings for investment purposes, in real assets and real asset companies. Real assets include, without limitation, investments related to real estate, agriculture, infrastructure, energy, natural resources, and timber. Real asset companies include companies that primarily own, explore, mine, process or otherwise develop real assets. The Fund invests in real assets and real asset companies directly, and indirectly through other entities, including private institutional investment funds ("Private Funds") that pursue these strategies.
See "INVESTMENT STRATEGIES AND RISKS" for more information.
INVESTMENT STRATEGIES AND RISKS
Under Additional Information about Investment Strategies and Risks, after Short Sales (Non-Principal), add the following:
Special Purpose Acquisition Companies (“SPACs”) (Non-Principal)
The Fund may invest in securities of special purpose acquisition companies (“SPACs”) or similar special purpose entities that pool funds to seek potential acquisition opportunities. Unless and until an acquisition is completed, a SPAC or similar entity generally maintains assets (less a portion retained to cover expenses) in a trust account comprised of U.S. Government securities, money market securities, and cash, and similar investments whose returns or yields may be significantly lower than those of the Fund’s other investments. Because SPACs and similar entities are in essence blank-check companies without an operating history or ongoing business other than seeking acquisitions, the value of their securities is particularly dependent on the ability of the entity’s management to identify and complete a profitable acquisition, which may not occur. For example, even if an acquisition or merger target is identified, the Fund may elect not to participate in, or vote to approve, the proposed transaction. Moreover, an acquisition or merger once effected may prove unsuccessful and an investment in the SPAC may lose value.
SPACs are also subject to the following additional risks:
The risk that, in the case of SPACs used as an opportunity for startups to go public without going through the traditional IPO process, such startups may become publicly traded with potentially less due diligence than what is typical in a traditional IPO through an underwriter.
Since SPAC sponsors often stand to earn equity in the company if a deal is completed, SPAC sponsors may have a potential conflict of interest in completing a deal that may be unfavorable for other investors in the SPAC.
A SPAC may allow shareholders to redeem their pro rata investment immediately after the SPAC announces a proposed acquisition, sometimes including interest, which may prevent the entity’s management from completing the transaction.
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Some SPACs may pursue acquisitions only within certain industries or regions, which may increase the volatility of their prices.
Only a thinly traded market for shares of or interests in a SPAC may develop, or there may be no market at all, leaving the Fund unable to sell its interest in a SPAC or to sell its interest only at a lower price. Investments in SPACs may include private placements, including PIPEs, and, accordingly, may be considered illiquid and/or be subject to restrictions on resale.
Values of investments in SPACs may be highly volatile and may depreciate significantly over time.
Changes in regulatory oversight and/or requirements related to SPACs could adversely affect the value of the Fund’s interest in a SPAC.

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