Co-Investment SPVs Alongside a Venture Fund

A co-investment SPV alongside a venture fund is a sidecar: a separate legal vehicle that takes extra allocation in a company the fund is already buying. It has its own investors, its own offering, and its own Form D. The fund's allocation policy decides how much stays in the fund and how much goes to the sidecar.

This is GP-side sidecar mechanics, not a primer on running a syndicate next to a fund or a list of reasons to adopt a hybrid program. For those, see how venture syndicates use SPVs alongside traditional venture funds and SPV syndicate fundraising. It covers allocation policy, a second issuer, sidecar versus fund economics, same-round conflicts, and stuffing versus a sidecar.

This is general information, not legal, tax, or investment advice. Allocation language lives in the LPA, side letters, and counsel's integration analysis.

What the sidecar is

The fund is already in the round. The company has more stock to place than the fund can, or should, take. The GP forms a Delaware LLC, invites a subset of fund LPs and sometimes outsiders, and the SPV buys the overflow at the same price and in the same class as the fund.

Three things that are easy to confuse with this:

• A syndicate SPV run by someone who is not the GP. An outside lead filling leftover allocation is a different relationship. The fund did not create that vehicle.

• An SPV that commits as an LP into the fund. That is a feeder. The asset is a fund interest, not a share of the portfolio company.

• Putting the extra dollars into the fund. Same issuer, same LPA, same Form D, same economics. No sidecar.

Allocation policy comes first

Write the rule before the deal memo. ILPA's Principles 3.0 tell GPs to disclose, in the PPM and the LPA, a framework for how co-investment opportunities, interests, and expenses will be allocated among the fund and any participating co-investors, including whether any prioritization applies. The policy should be clear enough to verify after the fact. Side-letter rights to evaluate or take pro-rata co-invest should be disclosed to all LPs, not only the holders. (ILPA Principles 3.0, Co-Investment Allocations.)

ILPA's default order is blunt: suitable opportunities go to the fund first if they fit the strategy and the fund has remaining commitments. When the GP then presents a co-invest tranche, it should explain why that slice is not going into the fund. Parallel vehicles and GP affiliates may participate, but only in the same securities and on the same terms as the fund, with related fees and expenses allocated pro rata. Offers to another GP vehicle, or to an entity outside the commingled fund, go to the LPAC with the reason, especially if the deal is inside the fund's concentration limits.

A usable policy states, in writing: strategy fit; remaining commitments and follow-on reserves; issuer and sector concentration; who is invited; who owns the next-round pro-rata on the co-invest piece; and who pays if the round breaks after counsel is hired. ILPA also suggests a pre-qualifying process so the GP knows which LPs can execute on a short fuse.

Separate vehicle, separate Form D

The fund sold limited-partnership interests years ago. The SPV is selling membership interests now. Those are two issuers and two offerings.

Rule 503 requires each issuer that sells in reliance on Regulation D to file a Form D notice on EDGAR no later than 15 calendar days after the first sale in that offering. First sale is the date the first investor is irrevocably contractually committed. The SEC does not charge a fee for the notice or an amendment. A new and distinct offering needs a new original Form D, not an amendment to the fund's old notice. (SEC, Form D FAQs, last reviewed 9 July 2026; SEC, Filing a Form D Notice.)

Do not add the sidecar to the fund's Form D. The fund's filing describes the fund offering. The SPV's filing describes the SPV offering: issuer name, related persons, exemption, offering amount, and states of solicitation.

Blue-sky notices travel with the SPV offering, in each state where you offer or sell SPV interests. The fund's old state notices do not cover the sidecar. Process and state fees are in Form D and blue-sky compliance.

The exemption on the SPV can differ from the fund. A 506(b) fund does not force the sidecar to be 506(b). If you generally solicit for the SPV, you are in 506(c) on that offering and you verify accredited status. If you stay inside a pre-existing LP list with no public marketing, 506(b) may still fit. That choice is 506(b) versus 506(c), applied to the sidecar, not inherited from the fund.

Fees and carry on the SPV versus the fund

The fund's management fee and carry do not automatically attach to the sidecar. The SPV operating agreement sets its own management fee, deal fee, and carried interest.

ILPA's position: a GP may charge management or transaction fees on co-investments unless the LPA forbids it; those fees, and how they change the split of portfolio-company fees between the fund and co-investors, must be disclosed, including any offset; fees payable to the co-investment vehicle should accrue to the underwriting fund and offset management fees; differentiated economics offered to co-investing LPs should be disclosed to all LPs; and broken-deal expense on the co-invest should follow the same allocation logic as the fees.

Many venture sidecars charge no ongoing management fee and a carry that is lower than the fund's, or zero carry for LPs who already pay fund carry on the same company. That is a commercial choice, not a rule. What you cannot do quietly is charge the SPV a fee that the fund LPs never see, or keep a syndication fee that ILPA says should be disclosed along with who benefits.

Two stacks of economics also mean two stacks of tax reporting. The fund issues K-1s to fund LPs. The SPV issues K-1s to SPV members. An LP in both vehicles gets both.

Same-round conflicts

The fund and the SPV are buying the same round. Interests are aligned on a good exit and split on almost everything else.

Price and terms. ILPA wants parallel and affiliate capital in the same securities on the same terms. A cheaper SPV class, a warrant kick, or a side letter that improves the sidecar's liquidation preference is the conflict. If the company insists on a different instrument for the overflow, take that to the LPAC before you sign.

Information and follow-on. The fund may hold a board seat and see monthly packs. SPV members often see a memo and a close deck. Say that in the SPV documents. Write who owns the next-round pro-rata and how a reserved follow-on is funded.

Who got invited. A side letter that promised LP A first look, while LP B hears about the SPV after it is full, is the disclosure ILPA flags. You do not have to offer every LP every co-invest. You do have to tell the partnership that priority exists.

Stuffing versus sharing. The common conflict: the fund had room, the deal fit, and the extra went to a sidecar because the GP wanted a separate carry pocket. That is the case ILPA tells you to explain to the LPAC.

When to use the SPV versus stuffing the fund

Stuff the fund when the check fits the strategy, remaining commitments, and concentration limits, and you do not need a second issuer. That is the ILPA default: one vehicle, one Form D, one set of K-1s.

Open a co-investment SPV when one of these is true and you can say so in writing:

• The check would breach a concentration or single-issuer cap in the LPA.

• The fund is reserved for follow-ons and the overflow is optional, not core.

• One or more LPs have a documented co-invest right and want more than their fund pro-rata.

• The extra capital is coming from people who are not, and should not be, fund LPs.

• The company will not accept more fund capital on the fund's timeline, but will take a second close through a sidecar.

Do not open a sidecar to manufacture a second carry on a deal the fund should have owned, or to hide a third-party syndicate inside the firm's allocation. If an outside lead is running the extra, that is the syndicate model in the posts linked above.

Most sidecars should collect the full commitment at close. Capital calls belong on multi-year or tranched vehicles; see SPV capital calls. Do not add a call schedule to a single-close overflow just because the fund has one.

Standing the vehicle up

Formation is the same work as any other deal SPV: Delaware LLC, operating agreement, bank account, KYC, subscriptions, Form D, blue-sky notices, then one wire to the company. The step-by-step is in how to set up an SPV. Standard SPVs on Allocations start at $9,950.

Before you send a subscription packet: confirm the LPA and side letters permit the vehicle and the invitation list; put the strategic reason for the tranche in the deal memo; match price, class, and closing date to the fund, or document why you cannot; state SPV fees, carry, and expense cap, including any offset back to the fund; say who votes the stock and who sees company information; and file the SPV Form D off the SPV's first commitment, not off the fund's first close from two years ago.

Allocations can form and administer the sidecar on the same stack as the fund. The allocation decision and the LPAC conversation stay with the GP.

Frequently asked questions

What is a co-investment SPV alongside a venture fund? A separate vehicle, usually a Delaware LLC, that takes extra allocation in a company the fund is already buying. It is a second issuer, not a sleeve of the fund.

Does the sidecar need its own Form D? Yes. Rule 503 ties the notice to each offering. The SPV's first irrevocable commitment starts a new 15-day clock. Do not amend the fund's Form D to cover the SPV.

Who pays fees and carry? Fund LPs pay the fund schedule. SPV members pay whatever the SPV operating agreement says. ILPA asks that fees on the co-invest vehicle accrue to the underwriting fund and offset management fees.

When should the extra go into the fund instead? When the deal fits the strategy, the fund has room, and concentration limits are intact. Use the SPV for overflow, documented co-invest rights, or investors who should not be on the fund's cap table.

What is the main same-round conflict? Different terms, a quiet invitation list, or a second carry on a check the fund could have written.

This article is for informational purposes only and is not legal, tax, or investment advice. Partnership terms, offering exemptions, and conflict procedures depend on your documents and facts. Consult qualified counsel.