Aon Leads Seven Clean Insider Buys, $16.71M
Aon led seven clean insider-buying signals totaling $16.71 million in the August 31–September 7 trade-date window, with repeated buying at AAT, PAM, and NPB and unresolved rows separated out.
The screen retained seven clean issuer signals in the August 31–September 7, 2026 trade-date window, representing $16,709,356 in reported purchases. Aon director Lester B. Knight supplied the largest order at $6.55 million. American Assets Trust added the clearest repeat-buying pattern, while the remaining signals came from one eligible insider each. The screen used trade date for admission and excluded rows whose role, venue, financing structure, or share class could not be resolved.
Screen window: Trade dates from August 31 through September 7, 2026, Eastern time. The quote snapshot was taken September 7, 2026, at about 9:10 AM ET, before the regular session opened. Marks are unrealized comparisons with reported entry prices, not return forecasts. The PAM filing price and the NYSE ADR quote use different venue and unit conventions, so PAM has no percentage mark.
The comparison
| Issuer and eligible buyer | Trade date | Shares and execution price | Reported purchase value | Filing shape | Sept. 7 mark vs. entry |
|---|---|---|---|---|---|
| Aon (AON), Lester B. Knight, director | Sept. 2 | 20,000 at $327.48 | $6,549,688 | Single insider | $323.09; -1.34% 12 |
| American Assets Trust (AAT), Ernest S. Rady, executive chairman / 10% owner | Aug. 31 | 166,636 at $22.45 | $3,740,910 | Same insider, repeated buying | $22.04; -1.83% 34 |
| Pampa Energía (PAM), Marcos Marcelo Mindlin, director / 10% owner | Aug. 31 | 500,000 at $3.44 | $1,720,000 | Same insider, repeated buying | Venue and unit caveat 56 |
| Northpointe Bancshares (NPB), Charles Alan Williams, chairman / CEO / 10% owner | Sept. 1 | 85,000 at $16.74 | $1,422,926 | Same insider, repeat buyer | $17.28; +3.23% 78 |
| Amrize (AMRZ), Jan Philipp Jenisch, chairman / CEO | Sept. 2 | 30,000 at $42.47 | $1,274,080 | Single insider | $43.82; +3.18% 910 |
| ITT (ITT), Luca Savi, president / CEO | Aug. 31 | 5,019 at $199.56 | $1,001,592 | Single insider | $204.33; +2.39% 1112 |
| MSCI (MSCI), Rajat Taneja, director | Sept. 2 | 1,786 at $560.00 | $1,000,160 | Single insider | $573.01; +2.32% 1314 |
1. Aon (AON)
Transaction. Director Lester B. Knight bought 20,000 shares at $327.48 on September 2, for a reported $6,549,688. Knight's available history contains one earlier purchase: 4,000 shares at $319.24 on February 10, 2026, valued at $1,276,956. 115
Company context. The filing record supplies no transaction-specific catalyst. The signal is therefore the size of a director's purchase and the fact that Knight has bought AON before. A standardized six-month or twelve-month appreciation result is unknown because the available history does not provide enough dated observations for that check.
Current mark. AON was $323.09 in the September 7 pre-market snapshot, 1.34% below Knight's $327.48 entry. 2
Signal read. Knight's order is the week's largest clean purchase. The earlier purchase establishes a repeat-buyer pattern; the available record does not establish a measured hit rate.
2. American Assets Trust (AAT)
Transaction. Executive chairman and 10% owner Ernest S. Rady bought 166,636 shares at a displayed weighted price of $22.45 on August 31, for $3,740,910. Rady also bought 100,000 shares at $22.54 on August 27 and 79,729 shares at $22.83 on August 24. Those earlier trades sit outside the current window but show a continuing sequence. 31617
Company context. A dated filing summary reports that the August 31 filing did not mark the Rule 10b5-1 checkbox. The same source describes Rady's purchases as open-market or private transactions, so the filing confirms the reported purchase while leaving the exact execution venue less specific than an exchange-only label. 18
Track record. Rady is a sustained buyer in the available history, with additional purchases on August 24 and August 27 and earlier purchases in August. The pattern is useful context for due diligence; a standardized six-month or twelve-month appreciation result is unknown. 19
Current mark. AAT was $22.04, 1.83% below the displayed $22.45 entry. 4
Signal read. AAT is the clearest repeated accumulation in this week's set. The sequence says more about persistence than about the eventual return.
3. Pampa Energía (PAM)
Transaction. Director and 10% owner Marcos Marcelo Mindlin bought 500,000 shares at a displayed price of $3.44 on August 31, for $1,720,000. Mindlin also bought 150,000 shares on August 27 and 675,000 shares on August 21. 520
Company context. The available filing history shows repeated buying by the same eligible insider. The Form 4 price may describe Argentine-peso ordinary-share data, while the quote feed supplies the NYSE ADR price in U.S. dollars. The two figures cannot support a direct percentage comparison. 56
Track record. Mindlin's available history shows purchases on August 18, August 21, August 27, and August 31. The sequence establishes repeated buying; a standardized six-month or twelve-month appreciation result is unknown. 20
Current mark. PAM was $84.80 in the NYSE quote snapshot. The quote is an ADR price, so the snapshot is presented for context rather than as a return against the $3.44 filing price. 6
Signal read. PAM has the strongest repeat-buying cadence in the set after AAT. The venue and unit mismatch keeps the current mark from being a clean performance comparison.
4. Northpointe Bancshares (NPB)
Transaction. Chairman and CEO Charles Alan Williams bought 85,000 shares at $16.74 on September 1, for a reported $1,422,926. Williams also bought 78,312 shares at $16.95 on August 25, followed by smaller purchases in May and February. 721
Company context. The filing record supplies no transaction-specific catalyst. The current order follows a $1.33 million purchase by the same insider one week earlier, so the signal is a repeat purchase rather than a single isolated filing.
Current mark. NPB was $17.28, 3.23% above the $16.74 entry. 8
Track record. Williams has multiple prior purchases in the available history, including the August 25 trade and smaller purchases in May and February. The history establishes repeated buying; a standardized six-month or twelve-month appreciation result is unknown. 21
Signal read. The two August purchases put $2,750,032 of reported value behind one insider's recent accumulation. That sum combines the current $1,422,926 with the August 25 $1,327,106 filing value; it is context for the buying sequence, not a new threshold test.
5. Amrize (AMRZ)
Transaction. Chairman and CEO Jan Philipp Jenisch bought 30,000 shares at $42.47 on September 2, for a reported $1,274,080. Smaller purchases by other Amrize insiders appeared in late August, including director and officer rows, but none reached the channel's $1 million threshold. 922
Company context. The available screen shows a threshold-clearing CEO purchase alongside smaller late-August insider purchases. The pattern is broader than a single filing, while the sources used here supply no verified transaction-specific catalyst.
Current mark. AMRZ was $43.82, 3.18% above the $42.47 entry. 10
Track record. The available history shows no earlier purchase for Jenisch. A six-month or twelve-month appreciation result is unknown. 23
Signal read. AMRZ combines a clean CEO purchase with smaller same-issuer buying. The companion trades strengthen the case for further review as a company-level pattern, while the available history supplies no measured record for Jenisch.
6. ITT (ITT)
Transaction. President and CEO Luca Savi bought 5,019 shares at $199.56 on August 31, for a reported $1,001,592. The filing summary says the Rule 10b5-1 checkbox was not marked. 1124
Company context. ITT's recent second-quarter filing reported $1,473.1 million in revenue, including $359.6 million from the SPX FLOW acquisition, and 12.7% organic growth. The filing also reported $3,728.2 million of total debt at quarter-end. Those figures provide operating context; they do not identify a transaction-specific catalyst. 25
Current mark. ITT was $204.33, 2.39% above Savi's $199.56 entry. 12
Track record. The available history shows no prior purchase for Savi. A six-month or twelve-month appreciation result is unknown. 26
Signal read. Savi's purchase barely clears the threshold, so the exact reported value matters. The no-10b5-1 indication adds classification context, while the operating figures point to both acquisition-driven growth and higher leverage.
7. MSCI (MSCI)
Transaction. Director Rajat Taneja bought 1,786 shares at $560.00 on September 2, for a reported $1,000,160. The filing summary reports no Rule 10b5-1 plan. Other MSCI directors received small dividend-related grants in late August; those awards are excluded from this open-market screen. 132728
Company context. MSCI's second-quarter filing reported $867.0 million in operating revenue, $342.0 million in net income, and $487.5 million in operating income. The filing also described 9.0% growth in recurring subscriptions and 26.6% growth in asset-based fees. 29
Current mark. MSCI was $573.01, 2.32% above Taneja's $560.00 entry. 14
Track record. No earlier purchase by Taneja appears in the available history. A six-month or twelve-month appreciation result is unknown. 30
Signal read. Taneja's purchase clears the threshold by $160. The amount is precise, and the classification is distinct from the nearby dividend-related grants.
Exclusions and classification notes
- Liberty Latin America (LILA): OpenInsider displayed Alfonso De Angoitia's August 31 purchase as 476,190 shares at $20.95, valued at $9,978,488. The current LILA quote was $8.52, and a separate secondary report described September 2 activity at an estimated $6,559,873. The available records leave a material price, date, or share-class reconciliation unresolved, so LILA stays outside the clean total. 3132
- Pimco Flexible Credit Income Fund (PFLEX): Jason Robert Steiner's September 2 row was labeled
SEE REMARKSrather than an executive or director role. The issuer is a fund, and the relationship and transaction structure remain unresolved. 33 - Below threshold: ATRA at $999,994 and DFIN at $999,990 failed the literal greater-than-$1 million test. 34
- Holder-only or fund-only rows: RSG, PBLSX, SUJA, EMPD, and TENX identify 10% holders or investment funds rather than a clearly eligible executive or director. 35
Bottom line
AON led the week by dollar value, AAT and PAM showed the clearest repeated buying, and NPB supplied a second large purchase by the same CEO within two weeks. AMRZ, ITT, and MSCI each added a single threshold-clearing officer or director signal. The seven signals support a focused diligence list; the available histories show buying patterns, while a standardized six-month or twelve-month appreciation record remains unknown for every retained buyer.
References
- 1AON Form 4
sec.gov
- 2Market quote for AON
finance.yahoo.com
- 3AAT Form 4
sec.gov
- 4Market quote for AAT
finance.yahoo.com
- 5PAM Form 4
sec.gov
- 6Market quote for PAM
finance.yahoo.com
- 7NPB Form 4
sec.gov
- 8Market quote for NPB
finance.yahoo.com
- 9AMRZ Form 4
sec.gov
- 10Market quote for AMRZ
finance.yahoo.com
- 11ITT Form 4
sec.gov
- 12Market quote for ITT
finance.yahoo.com
- 13MSCI Form 4
sec.gov
- 14Market quote for MSCI
finance.yahoo.com
- 15Knight insider history
openinsider.com
- 16AAT Form 4, August 27
sec.gov
- 17AAT Form 4, August 24
sec.gov
- 18AAT filing summary
stocktitan.net
- 19Rady insider history
openinsider.com
- 20PAM insider history
openinsider.com
- 21Williams insider history
openinsider.com
- 22AMRZ issuer filing history
openinsider.com
- 23Jenisch insider history
openinsider.com
- 24ITT filing summary
stocktitan.net
- 25ITT quarterly filing summary
stocktitan.net
- 26Savi insider history
openinsider.com
- 27MSCI filing summary
stocktitan.net
- 28MSCI dividend-related director grants
stocktitan.net
- 29MSCI quarterly filing summary
stocktitan.net
- 30Taneja insider history
openinsider.com
- 31LILA Form 4-linked OpenInsider record
openinsider.com
- 32LILA secondary purchase report
quiverquant.com
- 33PFLEX Form 4-linked OpenInsider record
openinsider.com
- 34Weekly officer purchase screen
openinsider.com
- 35Weekly all-insider purchase screen
openinsider.com
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