Ionis Pharmaceuticals, Inc. 401(k) Plan: Login, Facts & Contact Information

Ionis Pharmaceuticals, Inc. 401(k) Plan Facts

Plan name
IONIS PHARMACEUTICALS 401(K) PLAN
Plan type
401(k) with employer contributions
Plan sponsor
IONIS PHARMACEUTICALS, INC.
Participants
1,317 (1,043 active employees)
Former employees with a balance
387
Plan assets
$315,959,406 at Dec 31, 2024
Average account balance
$224,085 across 1,410 accounts
Employer contributions
$9,319,779 in plan year 2024 (28% of all contributions)
Recordkeeper
Fidelity Investments Institutional
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jan 1, 1991
✓ Employer contributions✓ Automatic enrollment✓ Default investment for undecided participants✓ Participants choose their own investments✓ Self-directed brokerage window— Profit sharing— Company stock (ESOP)

Source: Form 5500 for plan year 2024 (Jan 1, 2024 – Dec 31, 2024), filed Aug 25, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $32.9 million went into the plan in contributions, $9.32 million of it from the employer (28%).
  • $17.2 million was paid out to participants.
  • Investment and other income added $45.5 million.
  • Administrative expenses were $74,452, about $53 per account.

How the Ionis Pharmaceuticals, Inc. 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
2019851$129.3 million$5.31 million$1.70 million
2020715$191.3 million$4.09 million$3.74 million
2021888$234.5 million$5.78 million$17.7 million
20221,012$195.1 million$6.14 million$13.4 million
20231,202$254.8 million$7.61 million$12.6 million
20241,317$316.0 million$9.32 million$17.2 million

Ionis Pharmaceuticals, Inc. 401(k) Contact Information

Phone
760-603-3848
Mailing address
2855 GAZELLE COURT, CARLSBAD CA 92010
Plan sponsor
IONIS PHARMACEUTICALS, INC.
Employer identification number (EIN)
33-0336973
Plan number
001

Questions about the Ionis Pharmaceuticals, Inc. 401(k)

Does Ionis Pharmaceuticals, Inc contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $9.32 million, 28% of all contributions.

Does the Ionis Pharmaceuticals, Inc 401(k) have automatic enrollment?

Yes. The plan reports automatic enrollment of eligible employees.

How many people are in the Ionis Pharmaceuticals, Inc 401(k) plan?

1,317 participants at the start of plan year 2024, 1,043 of them active employees, and 387 former employees who still had money in the plan.

What is the average 401(k) balance at Ionis Pharmaceuticals, Inc?

About $224,085 per account: $316.0 million in plan assets across 1,410 accounts with a balance at the end of plan year 2024.

Who manages the Ionis Pharmaceuticals, Inc 401(k) accounts?

Fidelity NetBenefits (listed on the filing as FIDELITY INVESTMENTS INSTITUTIONAL) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Ionis Pharmaceuticals, Inc. How do I access my 401(k)?

Your account stays with Fidelity NetBenefits after you leave, so you can log in with the same credentials. If your balance was small, the plan may have rolled it into an IRA in your name. If you can't find it, Beagle can locate it for you.

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