Donor header
MARK HEISING
Individual · ATHERTON, CA · MEDLEY PARTNERS, LLC · FOUNDER
$3,582,546 total given · Largest contribution $322,500
Giving is concentrated among a small set of recipients.
Active cycles
1999-20002001-20022003-20042005-20062007-20082009-20102011-20122013-20142015-20162017-20182019-20202021-20222023-20242025-2026
Panel 2 • Finance overview
Total given
$3,582,546
First seen Sep 10, 2015 · Last activity Dec 18, 2025
Contribution footprint
56 recipients
156 contributions · Avg $22,965
Concentration
Top recipient 59.6%
Top 3 75.4%
Top 10 84.4%
Total givingReference baseline
Apr 2021Dec 2022Jul 2024Mar 2026
Spike markers
- 1Jan 2018 · GOVERN FOR CALIFORNIA ACTION COMMITTEE · $116,400
- 2Feb 2025 · GOVERN FOR CALIFORNIA ACTION COMMITTEE · $450,000
- 3Dec 2025 · HEISING-SIMONS ACTION FUND NONPROFIT 501 (C) (4) · $2,136,046
Scope: All time60 points
Panel 3 • Top recipients
| Recipient | Total | Share* | Count | Dates | Details |
|---|---|---|---|---|---|
| HEISING-SIMONS ACTION FUND NONPROFIT 501 (C) (4) | $2,136,046 | 59.6% | 28 | Jun 2020 - Dec 2025 | |
| GOVERN FOR CALIFORNIA ACTION COMMITTEE | $450,000 | 12.6% | 2 | Feb 2024 - Feb 2025 | |
| GOVERN FOR CALIFORNIA ACTION COMMITTEE | $116,400 | 3.2% | 2 | Oct 2016 - Jan 2018 | |
| NEWSOM FOR CALIFORNIA GOVERNOR 2022 | $64,800 | 1.8% | 2 | May 2022 - May 2022 | |
| NEWSOM FOR CALIFORNIA GOVERNOR 2018 | $58,400 | 1.6% | 4 | Dec 2016 - Nov 2017 | |
| GOVERN FOR CALIFORNIA COURAGE COMMITTEE | $55,500 | 1.5% | 7 | Jun 2017 - Aug 2023 | |
| GFC COURAGE COMMITTEE - PALO ALTO CHAPTER | $38,100 | 1.1% | 5 | May 2019 - Aug 2023 | |
| GFC COURAGE COMMITTEE - SANTA CRUZ CHAPTER | $37,100 | 1% | 5 | May 2019 - Aug 2023 | |
| GFC COURAGE COMMITTEE - EAST BAY CHAPTER | $33,100 | 0.9% | 4 | Jun 2020 - Aug 2023 | |
| GFC COURAGE COMMITTEE - SIERRA CHAPTER | $33,100 | 0.9% | 4 | Jun 2020 - Aug 2023 |
Showing 10 of 56
* Share is percent of donor total in the selected scope. Page rows are a subset and typically do not sum to 100%.