S Mark Taper Foundation

The S. Mark Taper Foundation is a family-directed private trust established in 1989, now managing assets of $186.2 million from its West Los Angeles headquarters at 12011 San Vicente Blvd. Its giving philosophy is fundamentally responsive: unlike many foundations of similar scale, it does not issue RFPs, design new initiatives, or solicit specific types of proposals. Instead, it opens a single annual LOI window and responds to eligible organizations that find their own alignment with its mission.

The foundation favors established organizations with demonstrated community roots. Its grantee database reveals multi-year capital relationships: Venice Family Clinic received 3 grants totaling $750,000 for clinic renovations; Holocaust Museum LA received 3 grants totaling $700,000 for campus expansion; Los Angeles Regional Food Bank received 3 grants totaling $625,000 for headquarters construction. These are not one-off investments — they represent deepening capital partnerships built on trust. First-time applicants who receive an entry-level award ($50K–$75K) and perform well are positioned to build toward this tier over subsequent cycles.

The relationship progression follows four defined stages: (1) LOI submission through the SmartSimple online grants portal, open December 2 through February 4 annually; (2) invitation by email to advance to a full proposal — no unsolicited full proposals are accepted; (3) possible site visit for select finalists; and (4) final grant decisions communicated by late October. The entire cycle takes roughly 10 months from LOI to decision.

A structural advantage for new applicants: organizations that received a grant payment in the past three calendar years are ineligible to apply. This built-in rotation means the foundation actively creates openings for new grantees every cycle. With 350–500 LOIs received and 60–80 grants awarded annually, the effective acceptance rate of 15–22% is competitive but achievable for organizations that clearly serve Los Angeles County residents, align with the six stated program areas (arts, civic affairs, education, environment, health, social services), demonstrate organizational stability, and request an amount proportionate to their budget.

The foundation's grants paid have been consistent over a five-year span: $6.17M (2019), $5.92M (2020), $5.83M (2021), $7.54M (2022, the recent peak), $6.87M (2023), and $6.63M (2024). Total charitable giving including non-grant disbursements averaged approximately $8.63M annually from 2019–2023. Despite assets growing 83% from $101.5M in 2020 to $186.2M by the most recent filing, grants paid grew only modestly — the foundation distributes based on net investment income (averaging $5.1M–$7.1M annually) rather than a fixed percentage of assets, resulting in a conservative payout ratio near 3.6%.

From the aggregated grantee database (316 grants, $27.86M total, average $88,168, median approximately $50,000–$75,000), the portfolio clusters into four tiers:

• Transformational capital ($500K–$2.1M): ~8–12 awards. Reserved for capital campaigns by established multi-year partners. Top recipients: Children's Institute Inc ($2.1M, 2 grants, Watts campus construction), Cedars-Sinai Medical Center ($900K, Children's Healing Garden), Venice Family Clinic ($750K, 3 grants), Holocaust Museum LA ($700K, 3 grants), LA Regional Food Bank ($625K, 3 grants).

• Major grants ($200K–$500K): ~15–20 awards. Mix of GOS for anchor organizations and capital for mid-tier campaigns. Examples: Planned Parenthood LA ($500K GOS, 2 grants), Jewish Free Loan Association ($500K, student loan fund), Destination Crenshaw ($450K capital, cultural corridor).

• Standard grants ($100K–$200K): The core of the portfolio (~40–50% of awards). GOS at $150K–$200K for well-established nonprofits: A Noise Within, Inner City Law Center, Alliance for Children's Rights, College Track, Proyecto Pastoral, Penny Lane Centers.

• Entry grants ($25K–$75K): New or smaller organizations. Recent examples: Pools of Hope ($50K, January 2026), Carousel Ranch ($75K, November 2025), Music Will ($75K).

By program area, the grantee list suggests approximately: social services and human services (40%), health (25%), arts and culture (15%), education (15%), civic affairs and environment (5%). The foundation does not publish explicit allocation percentages. Geographically, 97% of grants (306 of 316) flow to California organizations, with rare exceptions for national-mission relationships or special circumstances.

The following comparison places S. Mark Taper alongside its asset-peer foundations (all in the $185M–$188M range, Philanthropy & Grantmaking NTEE category) plus two well-known LA-area family foundations for additional regional context:

S. Mark Taper stands apart from its asset peers in three important ways. First, it is the only foundation in this group operating an explicit, time-bound open LOI window (December–February annually), offering a genuine unsolicited entry path — most peer foundations operate exclusively by invitation or board-directed grantmaking. Second, its geographic concentration on a single metro region (Los Angeles County, with Southern California as secondary) contrasts with BHP Foundation's global footprint and the Illinois-centric peer foundations. Third, its payout ratio of approximately 3.6% of assets is conservative relative to the 5% minimum required of private foundations, suggesting significant retained capacity that could support increased giving in future cycles as investment income grows with the asset base.

The foundation's most publicized recent commitment was a $1.25 million capital naming gift in March 2025 to the future Westside Los Angeles Ronald McDonald House. The new 33-room facility will serve families of seriously ill children receiving treatment at nearby Westside hospitals, and the Dining Room will carry the Taper name permanently. This gift represents the type of high-visibility capital commitment the foundation makes to health-serving institutions with long-standing Los Angeles community presence.

In November 2025, the foundation awarded $75,000 to Carousel Ranch (Santa Clarita Valley) for the 'Ready to Work' vocational training program serving young adults with special needs — a relationship dating to 2016 when the program launched with just two employed students. It now supports 43 students in jobs or paid internships. This long-term program relationship exemplifies how the foundation sustains investments in education-adjacent social services programs that demonstrate measurable employment outcomes.

In January 2026, Pools of Hope (North Long Beach) received $50,000 in general operating support for therapeutic aquatic programs reaching over 4,000 individuals with special health needs and 15,000 residents through prevention education. In early 2026, SNAP San Diego received a grant funding six free spay/neuter clinics for San Diego County Tribal communities — an unusual geographic exception signaling the foundation will cross its typical LA County boundary for compelling underserved-community proposals.

No leadership changes have been publicly announced. Executive Director Adrienne Wittenberg ($285,597 compensation, 2023) and CFO/Trustee Roy Weitz ($392,601, 2023) appear stable in their roles. The foundation maintains minimal public communications beyond its website.

Submit precisely within the window — no exceptions. The LOI portal opens December 2 at 2:00 PM PST and closes February 4 at 2:00 PM PST. The foundation states explicitly that late submissions will not be considered regardless of circumstances. Build your draft well before December 2 so you can submit during the first two weeks of the window.

Match your grant type to your geography. Capital funding is restricted to Los Angeles County-based organizations with a $100,000 minimum request. GOS and program funding is open to nonprofits serving LA, Imperial, Riverside, San Bernardino, and Ventura counties, with Orange, San Diego, and Santa Barbara also considered. If your primary service area is outside LA County, do not apply for capital support.

Size your request to organizational scale. The foundation does not provide guidance on amounts and does not want to be asked. Calibrate against comparable prior awards in their 990s: organizations with budgets under $2M should request $50K–$100K; $2M–$10M budgets align with $100K–$200K; larger organizations can justify $200K–$500K. Oversizing signals poor self-awareness.

Anchor every claim in Los Angeles County geography. The foundation explicitly prioritizes LA County. Quantify your reach: name specific communities, zip codes, or neighborhoods served. Vague language like 'serving Southern California residents' weakens your case; 'serving 3,200 residents in Watts, Boyle Heights, and East LA annually' is far more effective.

Use the foundation's DEI framing. Their guidelines specifically reference 'diversity, equity, and inclusion' and 'systemic disenfranchisement related to race, gender identity, sexual orientation, and disability.' When describing your population served, use this language directly — not as boilerplate, but as an accurate descriptor of who you reach.

Prepare the California Entity Status Letter last. It must be dated within 30 days of your LOI submission and must have both boxes 1 and 3 checked. Request it one to two weeks before your intended submission date. A missing or incorrectly checked letter disqualifies your LOI.

Demonstrate leadership stability. Any CEO or Executive Director transition within 12 months of LOI submission makes your organization ineligible. If a transition occurred, document the new leader's start date and wait until the 12-month mark has passed before applying.