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Original filing (PDF)20250926163908NAL0009590993001
AMBRX, INC.
Form 5500
FILING_RECEIVED
AMBRX, INC. 401(K) PLAN
401(k) retirement plan
Active participants
46
Accounts w/ balance
127
Plan assets (EOY)
$15.5M
Net assets (EOY)
$15.5M
How this plan invests
This plan
1 pooled trust
Schedule D
24 securities
funds · stocks · CUSIPs
Holdings are itemized directly on this plan's Schedule of Assets, below.
Plan health score (directional)
100
/ 100
Grade A
Top-tier plan health
Directional indicator computed from public Form 5500 data — compliance, concentration, cost, vendor stack and participation. Not a fiduciary tool.
Compliance & disclosures
100
Concentration risk
100
Total plan cost
100
Vendor stack
100
Participation health
100
Decision-maker contacts
CFO / Head of HR / Benefits Manager — verified email + LinkedIn for AMBRX, INC..
Plan sponsor
Name
AMBRX, INC.
EIN
57-1147346
Address
10975 NORTH TORREY PINES ROAD · LA JOLLA, CA · 92037
Phone
(858) 875-2479
Industry
Professional & Technical Servicessee all
Plan administrator
Same as plan sponsor.
Plan characteristics
Plan number
001
Plan year
2024
Plan year begin
2024-01-01
Tax period
2024-12-31
Filed
2025-09-26
Pension benefit codes
2G · Total participant-directed accounts
2J · 401(k) feature
2K · 401(m) arrangement
2T · Default investment account (QDIA)
2E · Profit-sharing
2F · ERISA section 404(c)
3D · Pre-approved plan (master / prototype / VS)
3H · Sponsor in controlled / affiliated group
Audit & trust (Schedule H)
Auditor
LAVINE LOFGREN MORRIS ENGELBEG LLP
Trustee / custodian
—
Trustee phone
—
Service providers (Schedule C)
2 rowsRecordkeeper
1| Name | EIN | Location | Relation | Direct comp | Indirect comp |
|---|---|---|---|---|---|
| FIDELITY INVESTMENTS INSTITUTIONAL | 04-2647786 | — | RECORDKEEPER | $12K | — |
Advisor / Consultant
1| Name | EIN | Location | Relation | Direct comp | Indirect comp |
|---|---|---|---|---|---|
| MMA SECURITIES | 22-3570392 | — | ADVISOR | $34K | — |
Investments
23 direct securities · 1 pooled fund· $15.5M(100% of reported assets)
Rows tagged as a trust or pooled fund hold many underlying securities. Click one to drill into its own Schedule of Assets — where the individual funds, shares, and CUSIPs live.
Uncategorized
$15.0M
23 holdings
Common Collective Trust
$495K
1 holding
| PI | Investment | Type | Shares / units | Cost | Current value | % of plan |
|---|---|---|---|---|---|---|
| Fidelity 500 Index Fund Mutual Fund - | — | — | — | $3.5M | 22.7% | |
| T. Rowe Price Retirement 2035 Fund Mutual Fund - | — | — | — | $2.8M | 18.3% | |
| T. Rowe Price Retirement 2030 Fund Mutual Fund - | — | — | — | $1.6M | 10.4% | |
| T. Rowe Price Retirement 2040 Fund Mutual Fund - | — | — | — | $1.3M | 8.2% | |
| JPMorgan Large Cap Growth Fund Class R6 Mutual Fund - | — | — | — | $1.2M | 8.1% | |
| T. Rowe Price Retirement 2045 Fund Mutual Fund - | — | — | — | $762K | 4.9% | |
| T. Rowe Price Retirement 2025 Fund Mutual Fund - | — | — | — | $699K | 4.5% | |
| T. Rowe Price Retirement 2050 Fund Mutual Fund - | — | — | — | $552K | 3.6% | |
| PUTNAM STABLE VALUE PUTNAM FIDUCIARY TRUST COMPANY · EIN 04-3159710 / PN 202 | Common Collective Trust | — | — | $495K | 3.2% | |
| T. Rowe Price Retirement 2020 Fund Mutual Fund - | — | — | — | $442K | 2.9% | |
| T. Rowe Price Retirement 2055 Fund Mutual Fund - | — | — | — | $297K | 1.9% | |
| T. Rowe Price Retirement 2060 Fund Mutual Fund - | — | — | — | $255K | 1.6% | |
| Fidelity Advisor Total Bond Fund Class I Mutual Fund - | — | — | — | $223K | 1.4% | |
| BlackRock Health Sciences Opportunities Fund Mutual Fund - | — | — | — | $215K | 1.4% | |
| Fidelity Mid Cap Index Fund Mutual Fund - | — | — | — | $210K | 1.4% | |
| Fidelity Small Cap Index Fund Mutual Fund - | — | — | — | $202K | 1.3% | |
| Fidelity International Index Fund Mutual Fund - | — | — | — | $200K | 1.3% | |
| Victory Sycamore Established Value Fund Class R6 Mutual Fund - | — | — | — | $147K | 0.9% | |
| MassMutual Mid Cap Growth Fund Class I Mutual Fund - | — | — | — | $89K | 0.6% | |
| JPMorgan Equity Income Fund Class R6 Mutual Fund - | — | — | — | $88K | 0.6% | |
| Fidelity Advisor Focused Emerging Markets Fund Class A Mutual Fund - | — | — | — | $64K | 0.4% | |
| Maturity in October 2034 -0- | — | — | — | $44K | 0.3% | |
| Fidelity Real Estate Index Fund Mutual Fund - | — | — | — | $31K | 0.2% | |
| T. Rowe Price Retirement 2015 Fund Mutual Fund - | — | — | — | $3K | <0.1% |
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