Flexible Solutions International, Inc. (FSI) Ownership
FSI ownership summary
as of October 18, 2026- Institutions
- 10.0% of shares outstanding
- Insiders
- 44.91% of shares outstanding
- Shares outstanding
- 12.8M
- Float
- 8.6M shares available to trade
- Short interest
- 0.90% 77K shares short
- Days to cover
- 7.19 short interest down 10.1% vs prior month
- Institutions 9.98%
- Insiders 44.91%
- Other investors 45.11%
FSI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Renaissance Technologies Corp | 2.59% | 330K | $2.0M | −11,194 (−3.3%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 2.22% | 282K | $1.7M | +3,962 (+1.4%) | June 30, 2026 |
| 3 | Dimensional Fund Advisors, Inc. | 0.76% | 96K | $581,502 | +3,836 (+4.2%) | June 30, 2026 |
| 4 | North Star Investment Management Corp | 0.71% | 90K | $544,500 | — | June 30, 2026 |
| 5 | Beartown Capital Management, LLC | 0.59% | 75K | $452,262 | — | June 30, 2026 |
| 6 | Regal Investment Advisors LLC | 0.34% | 43K | $261,269 | — | June 30, 2026 |
| 7 | Citadel Advisors Llc | 0.33% | 42K | $251,160 | +4,277 (+11.5%) | June 30, 2026 |
| 8 | Sentinus, LLC | 0.24% | 30K | $183,315 | +11,600 (+62.0%) | June 30, 2026 |
| 9 | Essex Investment Management Company, LLC | 0.21% | 26K | $158,389 | −72 (−0.3%) | June 30, 2026 |
| 10 | BlackRock Inc | 0.20% | 25K | $152,726 | +5,464 (+27.6%) | June 30, 2026 |
| 11 | James Investment Research, Inc. | 0.14% | 18K | $110,715 | — | June 30, 2026 |
| 12 | Goss Wealth Management LLC | 0.14% | 18K | $110,715 | −1,132 (−5.8%) | June 30, 2026 |
| 13 | Crestwood Advisors LLC | 0.12% | 15K | $92,517 | −9,889 (−39.3%) | June 30, 2026 |
| 14 | Quantinno Capital Management LP | 0.12% | 15K | $92,517 | −9,889 (−39.3%) | June 30, 2026 |
| 15 | Strait & Sound Wealth Management LLC | 0.11% | 14K | $86,079 | — | June 30, 2026 |
| 16 | XTX Topco Ltd | 0.09% | 11K | $67,911 | −1,935 (−14.7%) | June 30, 2026 |
| 17 | Vanguard Fiduciary Trust Co | 0.05% | 6,714 | $40,620 | — | June 30, 2026 |
| 18 | Covestor Ltd | 0.05% | 6,162 | $37,280 | — | June 30, 2026 |
| 19 | Founders Capital Management Inc | 0.05% | 6,000 | $36,300 | — | June 30, 2026 |
| 20 | Federation des caisses Desjardins du Quebec | 0.02% | 2,525 | $15,276 | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 5 holders added 29K shares and 6 cut 34K.
FSI top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.13% | 270K | $1.6M | — | August 31, 2026 |
| 2 | Perritt MicroCap Opportunities Investor | 0.71% | 90K | $544,500 | — | December 31, 2025 |
| 3 | North Star Micro Cap I | 0.71% | 90K | $544,500 | — | September 30, 2026 |
| 4 | DFA US Targeted Value I | 0.20% | 25K | $153,730 | — | August 31, 2026 |
| 5 | iShares Micro-Cap ETF | 0.18% | 23K | $136,409 | −155 (−0.7%) | September 30, 2026 |
| 6 | Dimensional US Targeted Value ETF | 0.11% | 14K | $86,430 | — | September 30, 2026 |
| 7 | Dimensional US Core Equity 2 ETF | 0.05% | 6,450 | $39,022 | — | September 30, 2026 |
| 8 | Dimensional Global Trgtd Value USD Acc | 0.04% | 5,218 | $31,569 | — | August 31, 2026 |
| 9 | Vanguard Balanced Index Inv | 0.03% | 3,738 | $22,615 | — | August 31, 2026 |
| 10 | Dimensional US Sustainability Core 1 ETF | 0.03% | 3,528 | $21,344 | — | September 30, 2026 |
| 11 | DFA US Core Equity 2 I | 0.03% | 3,460 | $20,933 | — | August 31, 2026 |
| 12 | DFA US Social Core Equity 2 Portfolio | 0.03% | 3,352 | $20,280 | — | August 31, 2026 |
| 13 | DFA US Sustainability Core 1 | 0.03% | 3,279 | $19,838 | — | August 31, 2026 |
| 14 | DFA US Core Equity Class F | 0.02% | 3,120 | $18,876 | — | July 31, 2026 |
| 15 | DFA US Vector Equity I | 0.02% | 2,757 | $16,680 | — | August 31, 2026 |
| 16 | Dimensional Global Core Equity USD Acc | 0.02% | 2,379 | $14,393 | — | August 31, 2026 |
| 17 | DFA US Core Equity 1 I | 0.02% | 2,175 | $13,159 | — | August 31, 2026 |
| 18 | Dimensional World Allc 60/40 GBP Acc | 0.02% | 1,920 | $11,616 | — | August 31, 2026 |
| 19 | DFA US Vector Equity Class F | 0.01% | 1,810 | $10,950 | — | July 31, 2026 |
| 20 | Dimensional Gl Cor Eq LC ESG Sc USD A | 0.01% | 1,788 | $10,817 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
FSI insider transactions
latest 4| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-03 | Brien Daniel B O | Sell | $5.88 | 12,500 | $73,500 |
| 2026-01-29 | Brien Daniel B O | Sell | $5.89 | 4,003 | $23,578 |
| 2026-01-28 | Brien Daniel B O | Sell | $5.84 | 45,500 | $265,720 |
| 2026-01-27 | Brien Daniel B O | Sell | $5.90 | 56,000 | $330,400 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
FSI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns FSI
Institutional investors own 10.0% of Flexible Solutions International's shares and insiders 44.91%. The largest holder is Renaissance Technologies Corp with 2.59% of the shares (330K), as of June 30, 2026. Among the top 20 institutions, 5 added shares and 6 reduced their stake in the latest filings. Short interest is 0.90% of the float, or 7.19 days of average trading volume. The share count fell 3.8% since 2014.
Related: FSI analyst forecast, FSI key metrics, FSI dividend history. See the FSI stock overview for the latest quote and news.
FSI ownership FAQ
Who owns the most Flexible Solutions International stock?
The largest shareholders of Flexible Solutions International are Renaissance Technologies Corp (2.59%), Vanguard Capital Management, LLC (2.22%), Dimensional Fund Advisors, Inc. (0.76%), North Star Investment Management Corp (0.71%), Beartown Capital Management, LLC (0.59%).
What percentage of Flexible Solutions International is owned by institutions?
Institutions hold 10.0% of Flexible Solutions International's shares outstanding; insiders hold 44.91%.
Which funds own Flexible Solutions International?
The largest fund holders of Flexible Solutions International are Vanguard MStar Total Stk Mkt Idx Invest (2.13%), Perritt MicroCap Opportunities Investor (0.71%), North Star Micro Cap I (0.71%), DFA US Targeted Value I (0.20%), iShares Micro-Cap ETF (0.18%).
What is Flexible Solutions International's short interest?
77K shares of Flexible Solutions International were sold short, 0.90% of the float; at the average daily volume it would take 7.19 days to cover.
Are insiders buying or selling Flexible Solutions International?
Of the latest 4 reported insider transactions in Flexible Solutions International (since January 27, 2026), 0 were purchases and 4 were sales.
How many shares of Flexible Solutions International are outstanding?
Flexible Solutions International has 12.8M shares outstanding, of which 8.6M are in the public float.