Institutional Manager · CIK 0001164632
Chesley Taft & Associates LLC
CHICAGO, IL · File #028-10082
Latest AUM
$2.53B
Positions
624
Top-10 Concentration
43.8%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | MICROSOFT CORP | MSFT | -204,739 | -$99.0M | -$7.8M |
| REDUCE | NVIDIA CORPORATION | NVDA | -431,793 | -$80.5M | -$36,889 |
| REDUCE | APPLE INC | AAPL | -272,008 | -$73.9M | +$4.9M |
| REDUCE | AMAZON COM INC | AMZN | -279,809 | -$64.6M | +$3.4M |
| REDUCE | JPMORGAN CHASE & CO. | VYLD | -156,825 | -$50.5M | +$1.1M |
| REDUCE | STRYKER CORPORATION | SYK | -127,873 | -$44.9M | -$2.5M |
| REDUCE | AMERICAN EXPRESS CO | AXP | -101,727 | -$37.6M | +$4.0M |
| REDUCE | ISHARES TR | 464287507 | -565,742 | -$37.3M | +$444,360 |
| REDUCE | ISHARES TR | 464287804 | -309,646 | -$37.2M | +$464,015 |
| REDUCE | SPDR S&P 500 ETF TR | SPY | -50,212 | -$34.2M | +$883,687 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025624 pos · $2.53B
- 13F HOLDINGS REPORTQ/E Sep 2025348 pos · $2.36B
- 13F HOLDINGS REPORTQ/E Jun 2025334 pos · $2.24B
- 13F HOLDINGS REPORTQ/E Mar 2025330 pos · $2.07B
- 13F HOLDINGS REPORTQ/E Dec 2024326 pos · $2.15B
- 13F HOLDINGS REPORTQ/E Sep 2024323 pos · $2.10B
- 13F HOLDINGS REPORTQ/E Jun 2024309 pos · $1.99B
- 13F HOLDINGS REPORTQ/E Mar 2024311 pos · $1.96B
- 13F HOLDINGS REPORTQ/E Dec 2023289 pos · $1.54B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | ALPHABET INC | GOOG | 398,229 | $125.0M | 7.43% |
| 2 | MICROSOFT CORP | MSFT | 220,378 | $106.6M | 6.34% |
| 3 | NVIDIA CORPORATION | NVDA | 450,904 | $84.1M | 5.00% |
| 4 | BROADCOM INC | AVGO | 239,256 | $82.8M | 4.93% |
| 5 | APPLE INC | AAPL | 272,286 | $74.0M | 4.40% |
| 6 | AMAZON COM INC | AMZN | 289,972 | $66.9M | 3.98% |
| 7 | COSTCO WHSL CORP NEW | 22160K105 | 63,061 | $54.4M | 3.24% |
| 8 | JPMORGAN CHASE & CO. | VYLD | 165,946 | $53.5M | 3.18% |
| 9 | STRYKER CORPORATION | SYK | 131,103 | $46.1M | 2.74% |
| 10 | VISA INC | V | 121,758 | $42.7M | 2.54% |
| 11 | ISHARES TR | 46432F834 | 492,390 | $41.7M | 2.48% |
| 12 | ISHARES TR | 464287804 | 331,302 | $39.8M | 2.37% |
| 13 | JOHNSON & JOHNSON | JNJ | 191,202 | $39.6M | 2.35% |
| 14 | SPDR GOLD TR | GLD | 98,432 | $39.0M | 2.32% |
| 15 | SPDR S&P 500 ETF TR | SPY | 56,714 | $38.7M | 2.30% |
| 16 | ISHARES TR | 464287507 | 573,456 | $37.8M | 2.25% |
| 17 | ORACLE CORP | ORCL-PD | 176,307 | $34.4M | 2.04% |
| 18 | ALPHABET INC | GOOG | 103,254 | $32.3M | 1.92% |
| 19 | PALO ALTO NETWORKS INC | PANW | 174,356 | $32.1M | 1.91% |
| 20 | AMERICAN EXPRESS CO | AXP | 80,994 | $30.0M | 1.78% |