Altair Engineering Inc.
Altair Engineering Inc. (ALTR) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ALTR · as of Sep 30, 2025
Ownership Breakdown
2
Institutional Holders
▼ 1 vs Q2
$10.02M
Total Inst. Value
▲ $9.73M vs Q2
86.12M
Shares Outstanding
freeFloat 55.67%
104,845
13F Shares Held
▲ 102,272 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ALTR largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 3 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BARCLAYS PLC services-prepackaged software | 104.8K | 12.47% | 12.47% | $10.01B | Mar 19, 2026 | NEW |
HUNTINGTON NATIONAL BANK services-prepackaged software | 1 | 0.00% | 0.00% | $2.08M | Nov 12, 2025 | — held |
ADVISOR GROUP HOLDINGS, INC. services-prepackaged software | 0 | 0.00% | 0.00% | $0 | Nov 14, 2025 | EXIT |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
0
Increased
+0 shares1
New Positions
first time holders0
Decreased
−0 shares1
Sold Out
fully exitedNet shares change (top 50)
+0
+0 / −0
Net new holders
+0
1 new / 1 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ALTR insider trading · insider activity
Source: SEC Form 4
21
Buy transactions
143
Sell transactions
0.15
Buy/Sell ratio
$39M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 22,500 | $52.03 | $1.17M | 0 | Form 4 ↗ |
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 6,280 | $61.93 | $388.9K | 0 | Form 4 ↗ |
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 15,625 | $79.03 | $1.23M | 0 | Form 4 ↗ |
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 35,168 | $5.18 | $182.2K | 0 | Form 4 ↗ |
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 49,875 | $113.00 | $5.64M | 0 | Form 4 ↗ |
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 8,500 | $61.79 | $525.2K | 0 | Form 4 ↗ |
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 24,000 | $45.91 | $1.10M | 0 | Form 4 ↗ |
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 14,845 | $65.19 | $967.7K | 0 | Form 4 ↗ |
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 3,804 | $3.64 | $13.8K | 0 | Form 4 ↗ |
Srikanth Mahalingam Chief Technology Officer | Mar 26, 2025 | D-Return | 7,136 | $3.84 | $27.4K | 0 | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Altair Engineering Inc. (ALTR) is primarily owned by institutional investors, who hold approximately 0.1% of total shares outstanding. Company insiders own approximately 44.33%, while retail and public investors account for the remaining 55.55%.
The largest institutional shareholder of Altair Engineering Inc. is BARCLAYS PLC, holding approximately 104,844 shares — equal to 12.47% of outstanding shares — as of September 30, 2025.
A total of 2 institutional investors currently hold ALTR stock, with a combined institutional value of approximately $10,015,726 as of the most recent 13F filing period.
Frequently asked questions
ALTR ownershipAltair Engineering Inc. (ALTR) is primarily owned by institutional investors, who hold approximately 0.1% of shares. The largest shareholder is BARCLAYS PLC with a 12.47% stake. Company insiders hold 44.33%. Data sourced from SEC Form 13F as of September 30, 2025.