Shareholder Report
|
6 Months Ended |
|
Jun. 30, 2026
USD ($)
Holding
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|---|
| Shareholder Report [Line Items] |
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| Document Type |
N-CSRS
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| Amendment Flag |
false
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| Registrant Name |
ALGER PORTFOLIOS
|
|
| Entity Central Index Key |
0000832566
|
|
| Entity Investment Company Type |
N-1A
|
|
| Document Period End Date |
Jun. 30, 2026
|
|
| C000025024 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
Alger Large Cap Growth Portfolio
|
|
| Class Name |
Class I-2
|
|
| Trading Symbol |
AAGOX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the Alger Large Cap Growth Portfolio (“Fund”) for the period from January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at www.alger.com/fundliterature. You can also request a copy of the semi-annual report by contacting us at (800) 992-3863.
|
|
| Additional Information Phone Number |
(800) 992-3863
|
|
| Additional Information Website |
www.alger.com/fundliterature
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment)
| Fund (Class/Ticker) |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Alger Large Cap Growth Portfolio
(Class I-2 / AAGOX) |
$46 |
0.83%(a) |
|
|
| Expenses Paid, Amount |
$ 46
|
|
| Expense Ratio, Percent |
0.83%
|
[1] |
| Net Assets |
$ 504,292,139
|
|
| Holdings Count | Holding |
50
|
[2] |
| Investment Company Portfolio Turnover |
48.76%
|
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics The following table outlines key fund statistics as of the fiscal six-month period ended June 30, 2026.
| Fund net assets |
$504,292,139 |
| Total number of portfolio holdings1 |
50 |
| Portfolio turnover rate |
48.76% |
|
1 |
Number of portfolio holdings is calculated at the issuer level. Excludes Money Market Funds. |
|
|
| Holdings [Text Block] |
Sector Allocation †
| Communication Services |
18.0% |
| Consumer Discretionary |
5.5% |
| Exchange Traded Fund |
2.9% |
| Financials |
0.8% |
| Health Care |
10.6% |
| Industrials |
4.9% |
| Information Technology |
52.1% |
| Mutual Fund |
2.6% |
| Utilities |
1.8% |
| Short-Term Investments and Other Net Assets |
0.8% |
|
100.0% |
|
|
| C000025026 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
Alger Small Cap Growth Portfolio
|
|
| Class Name |
Class I-2
|
|
| Trading Symbol |
AASOX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the Alger Small Cap Growth Portfolio (“Fund”) for the period from January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at www.alger.com/fundliterature. You can also request a copy of the semi-annual report by contacting us at (800) 992-3863.
|
|
| Additional Information Phone Number |
(800) 992-3863
|
|
| Additional Information Website |
www.alger.com/fundliterature
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment)
| Fund (Class/Ticker) |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Alger Small Cap Growth Portfolio
(Class I-2 / AASOX) |
$52 |
0.96%(a) |
|
|
| Expenses Paid, Amount |
$ 52
|
|
| Expense Ratio, Percent |
0.96%
|
[3] |
| Net Assets |
$ 164,102,236
|
|
| Holdings Count | Holding |
107
|
[4] |
| Investment Company Portfolio Turnover |
8.88%
|
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics The following table outlines key fund statistics as of the fiscal six-month period ended June 30, 2026.
| Fund net assets |
$164,102,236 |
| Total number of portfolio holdings1 |
107 |
| Portfolio turnover rate |
8.88% |
|
1 |
Number of portfolio holdings is calculated at the issuer level. Excludes Money Market Funds. |
|
|
| Holdings [Text Block] |
Sector Allocation †
| Communication Services |
1.5% |
| Consumer Discretionary |
7.8% |
| Consumer Staples |
1.6% |
| Energy |
2.6% |
| Financials |
2.0% |
| Health Care |
33.2% |
| Industrials |
22.6% |
| Information Technology |
20.9% |
| Materials |
1.2% |
| Utilities |
0.5% |
| Short-Term Investments and Other Net Assets |
6.1% |
|
100.0% |
|
|
| C000025028 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
Alger Growth & Income Portfolio
|
|
| Class Name |
Class I-2
|
|
| Trading Symbol |
AIGOX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the Alger Growth & Income Portfolio (“Fund”) for the period from January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at www.alger.com/fundliterature. You can also request a copy of the semi-annual report by contacting us at (800) 992-3863.
|
|
| Additional Information Phone Number |
(800) 992-3863
|
|
| Additional Information Website |
www.alger.com/fundliterature
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment)
| Fund (Class/Ticker) |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Alger Growth & Income Portfolio
(Class I-2 / AIGOX) |
$38 |
0.72%(a) |
|
|
| Expenses Paid, Amount |
$ 38
|
|
| Expense Ratio, Percent |
0.72%
|
[5] |
| Net Assets |
$ 51,279,850
|
|
| Holdings Count | Holding |
80
|
[6] |
| Investment Company Portfolio Turnover |
1.76%
|
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics The following table outlines key fund statistics as of the fiscal six-month period ended June 30, 2026.
| Fund net assets |
$51,279,850 |
| Total number of portfolio holdings1 |
80 |
| Portfolio turnover rate |
1.76% |
|
1 |
Number of portfolio holdings is calculated at the issuer level. Excludes Money Market Funds. |
|
|
| Holdings [Text Block] |
Sector Allocation †
| Communication Services |
11.5% |
| Consumer Discretionary |
6.8% |
| Consumer Staples |
5.3% |
| Energy |
4.1% |
| Financials |
12.7% |
| Health Care |
9.7% |
| Industrials |
5.4% |
| Information Technology |
38.1% |
| Materials |
2.1% |
| Real Estate |
3.1% |
| Utilities |
1.4% |
| Short-Term Investments and Other Net Assets |
(0.2)% |
|
100.0% |
|
|
| C000025030 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
Alger Balanced Portfolio
|
|
| Class Name |
Class I-2
|
|
| Trading Symbol |
ABLOX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the Alger Balanced Portfolio (“Fund”) for the period from January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at www.alger.com/fundliterature. You can also request a copy of the semi-annual report by contacting us at (800) 992-3863.
|
|
| Additional Information Phone Number |
(800) 992-3863
|
|
| Additional Information Website |
www.alger.com/fundliterature
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?
(Based on a hypothetical $10,000 investment)
| Fund (Class/Ticker) |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Alger Balanced Portfolio
(Class I-2 / ABLOX) |
$48 |
0.92%(a) |
|
|
| Expenses Paid, Amount |
$ 48
|
|
| Expense Ratio, Percent |
0.92%
|
[7] |
| Net Assets |
$ 71,249,917
|
|
| Holdings Count | Holding |
100
|
[8] |
| Investment Company Portfolio Turnover |
5.05%
|
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
The following table outlines key fund statistics as of the fiscal six-month period ended June 30, 2026.
| Fund net assets |
$71,249,917 |
| Total number of portfolio holdings1 |
100 |
| Portfolio turnover rate |
5.05% |
|
1
|
Number of portfolio holdings is calculated at the issuer level. Excludes Money Market Funds.
|
|
|
| Holdings [Text Block] |
Sector Allocation †
| Equities |
|
| Communication Services |
8.5% |
| Consumer Discretionary |
5.0% |
| Consumer Staples |
3.9% |
| Energy |
3.0% |
| Financials |
9.4% |
| Health Care |
7.2% |
| Industrials |
4.0% |
| Information Technology |
28.2% |
| Materials |
1.5% |
| Real Estate |
2.3% |
| Utilities |
1.1% |
| Total Equities |
74.1% |
| Corporate Bonds†† |
|
| AAA |
0.7% |
| AA |
4.2% |
| A |
11.9% |
| BBB |
5.6% |
| Total Corporate Bonds |
22.4% |
| U.S. Government Bonds |
2.9% |
| Short-Term Investments and Other Net Assets |
0.6% |
|
100.0% |
|
†
|
Based on net assets
|
|
††
|
For purposes of this report, credit quality ratings shown above reflect the rating assigned by S&P Global Ratings. This rating agency is an independent, nationally recognized statistical rating organization and is widely used. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Credit quality ratings are subject to change.
|
|
|
| Credit Quality Explanation [Text Block] |
For purposes of this report, credit quality ratings shown above reflect the rating assigned by S&P Global Ratings. This rating agency is an independent, nationally recognized statistical rating organization and is widely used. Investment grade ratings are credit ratings of BBB or higher. Below investment grade ratings are credit ratings of BB or lower. Credit quality ratings are subject to change.
|
|
| Credit Ratings Selection [Text Block] |
For purposes of this report, credit quality ratings shown above reflect the rating assigned by S&P Global Ratings.
|
|
| C000025032 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
Alger Mid Cap Growth Portfolio
|
|
| Class Name |
Class I-2
|
|
| Trading Symbol |
AMGOX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the Alger Mid Cap Growth Portfolio (“Fund”) for the period from January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at www.alger.com/fundliterature. You can also request a copy of the semi-annual report by contacting us at (800) 992-3863.
|
|
| Additional Information Phone Number |
(800) 992-3863
|
|
| Additional Information Website |
www.alger.com/fundliterature
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months?
(Based on a hypothetical $10,000 investment)
| Fund (Class/Ticker) |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Alger Mid Cap Growth Portfolio
(Class I-2 / AMGOX) |
$48 |
0.91%(a) |
|
|
| Expenses Paid, Amount |
$ 48
|
|
| Expense Ratio, Percent |
0.91%
|
[9] |
| Net Assets |
$ 166,922,539
|
|
| Holdings Count | Holding |
64
|
[10] |
| Investment Company Portfolio Turnover |
47.53%
|
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics
The following table outlines key fund statistics as of the fiscal six-month period ended June 30, 2026.
| Fund net assets |
$166,922,539 |
| Total number of portfolio holdings1 |
64 |
| Portfolio turnover rate |
47.53% |
|
1
|
Number of portfolio holdings is calculated at the issuer level. Excludes Money Market Funds.
|
|
|
| Holdings [Text Block] |
Sector Allocation †
| Communication Services |
4.5% |
| Consumer Discretionary |
10.7% |
| Consumer Staples |
1.8% |
| Financials |
9.2% |
| Health Care |
13.2% |
| Industrials |
23.7% |
| Information Technology |
28.1% |
| Materials |
1.7% |
| Real Estate |
2.3% |
| Utilities |
3.3% |
| Short-Term Investments and Other Net Assets |
1.5% |
|
100.0% |
|
|
| C000025034 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
Alger Capital Appreciation Portfolio
|
|
| Class Name |
Class I-2
|
|
| Trading Symbol |
ALVOX
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the Alger Capital Appreciation Portfolio (“Fund”) for the period from January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at www.alger.com/fundliterature. You can also request a copy of the semi-annual report by contacting us at (800) 992-3863.
|
|
| Additional Information Phone Number |
(800) 992-3863
|
|
| Additional Information Website |
www.alger.com/fundliterature
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment)
| Fund (Class/Ticker) |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Alger Capital Appreciation Portfolio
(Class I-2 / ALVOX) |
$49 |
0.92%(a) |
|
|
| Expenses Paid, Amount |
$ 49
|
|
| Expense Ratio, Percent |
0.92%
|
[11] |
| Net Assets |
$ 816,133,835
|
|
| Holdings Count | Holding |
82
|
[12] |
| Investment Company Portfolio Turnover |
36.87%
|
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics The following table outlines key fund statistics as of the fiscal six-month period ended June 30, 2026.
| Fund net assets |
$816,133,835 |
| Total number of portfolio holdings1 |
82 |
| Portfolio turnover rate |
36.87% |
|
1 |
Number of portfolio holdings is calculated at the issuer level. Excludes Money Market Funds. |
|
|
| Holdings [Text Block] |
Sector Allocation †
| Communication Services |
15.3% |
| Consumer Discretionary |
10.7% |
| Energy |
0.2% |
| Financials |
1.5% |
| Health Care |
8.4% |
| Industrials |
5.5% |
| Information Technology |
55.6% |
| Materials |
0.7% |
| Real Estate |
0.5% |
| Utilities |
1.8% |
| Short-Term Investments and Other Net Assets |
(0.2)% |
|
100.0% |
|
|
| C000025033 [Member] |
|
|
| Shareholder Report [Line Items] |
|
|
| Fund Name |
Alger Capital Appreciation Portfolio
|
|
| Class Name |
Class S
|
|
| No Trading Symbol Flag |
true
|
|
| Annual or Semi-Annual Statement [Text Block] |
This semi-annual shareholder report contains important information about the Alger Capital Appreciation Portfolio (“Fund”) for the period from January 1, 2026 to June 30, 2026.
|
|
| Shareholder Report Annual or Semi-Annual |
semi-annual shareholder report
|
|
| Additional Information [Text Block] |
You can find additional information about the Fund at www.alger.com/fundliterature. You can also request a copy of the semi-annual report by contacting us at (800) 992-3863.
|
|
| Additional Information Phone Number |
(800) 992-3863
|
|
| Additional Information Website |
www.alger.com/fundliterature
|
|
| Expenses [Text Block] |
What were the Fund costs for the last six months? (Based on a hypothetical $10,000 investment)
| Fund (Class) |
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Alger Capital Appreciation Portfolio
(Class S) |
$62 |
1.17%(a) |
|
|
| Expenses Paid, Amount |
$ 62
|
|
| Expense Ratio, Percent |
1.17%
|
[13] |
| Net Assets |
$ 816,133,835
|
|
| Holdings Count | Holding |
82
|
[14] |
| Investment Company Portfolio Turnover |
36.87%
|
|
| Additional Fund Statistics [Text Block] |
Key Fund Statistics The following table outlines key fund statistics as of the fiscal six-month period ended June 30, 2026.
| Fund net assets |
$816,133,835 |
| Total number of portfolio holdings1 |
82 |
| Portfolio turnover rate |
36.87% |
|
1 |
Number of portfolio holdings is calculated at the issuer level. Excludes Money Market Funds. |
|
|
| Holdings [Text Block] |
Sector Allocation †
| Communication Services |
15.3% |
| Consumer Discretionary |
10.7% |
| Energy |
0.2% |
| Financials |
1.5% |
| Health Care |
8.4% |
| Industrials |
5.5% |
| Information Technology |
55.6% |
| Materials |
0.7% |
| Real Estate |
0.5% |
| Utilities |
1.8% |
| Short-Term Investments and Other Net Assets |
(0.2)% |
|
100.0% |
|
|
|
|