What did Bill Ackman (@billackman) post on X, week of Sep 15 – Sep 21, 2026?

@billackman spent the week primarily amplifying others, using his reach to spotlight media bias against Israel and expose antisemitism in institutions, while occasionally weighing in on markets and AI.

Weekly brief · week of Sep 15 – Sep 21, 2026

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Israel & Antisemitism

~20%

He quote-tweeted an expose of an Air Canada in-flight director who posted violently antisemitic content, calling on the airline to review the employee [1]. His most-discussed post — 81 replies — tagged KPMG directly after a manager was filmed calling a Jewish man a “Zionist pig,” asking the company to respond [2]. When an X user offered to share raw October 7 footage, he pushed back, arguing that victim images could be obscured to protect families while still showing the truth [3].

Investing & Markets

~20%

He endorsed a report on Howard Hughes Holdings ($HHH), noting the market is pricing it like a pile of dirt despite Ackman turning it into a Berkshire-style compounder [4]. After a user said they lacked capital to invest in Pershing Square, he pointed them to $PSUS, noting a share costs $38.90 [5]. He called Alex Arnault joining Nike's board a great development, noting the brand needs help [6].

other

~20%

He shared a documentary he funded, Bucks County, USA, highlighting how kids handle political divides better than adults [7]. He called Bill Gurley's presentation on Covid origins brilliant and definitive [8]. He shared a video of humanoid robots from Figure doing tasks in unseen homes without new training [9].

Media & Institutional Critique (~20%): He amplified a peer-reviewed study showing major outlets cited Hamas casualty figures in 100% of articles but Israeli figures in just 3%, highlighting uneven skepticism [10]. He retweeted an account exposing how Reuters ran a sympathetic story on a Hezbollah pager attack survivor while hiding the subject's connection to a Radwan Force commander [11]. He shared a report revealing that Hamas runs a WhatsApp group managing the narrative among Gaza-based journalists at major outlets like Reuters, NYT, and CNN [12].

DSA / Socialist Democrats (~14%): He retweeted a breakdown showing Schumer's super PAC is backing Abdul El-Sayed with $30 million despite El-Sayed's anti-money-in-politics stance, funded by dark money and billionaires [13]. He amplified a fact-check showing El-Sayed lied about appearing with Hasan Piker only once; he actually appeared at five events [14].

NYC Governance & Rent Control (~6%): He retweeted a NY Post story on Mayor Mamdani being accused of colluding on a NYC rent freeze, with a judge ordering City Hall to release emails [15].

81 replies · 99.9k viewsHe tagged KPMG after a manager was filmed calling a Jewish man a 'Zionist pig,' demanding the company respond to the incident. [2]

60 replies · 78.5k viewsHe argued Alex Arnault joining Nike's board is great for the brand, noting that Nike needs the help. [6]

45 replies · 37.2k viewsHe criticized NY for killing the Regents exam requirement, arguing it lets schools push kids through without educating them. [16]

733.9k viewsretweeted @DeepLeaksHQ's video exposing an adult day care in Flushing, Queens billing for 7,000 phantom members to steal $12.9 million from taxpayers. [17]

541.1k viewsretweeted @EYakoby reporting a hacker broke into IRGC servers and found January's death count was in the hundreds of thousands. [18]

404.1k viewsretweeted @AGHamilton29 criticizing Reuters for hiding that a Hezbollah pager attack survivor's father was a Raduan Force commander. [11]

290.9k viewsretweeted @Sarahsa09309757 telling the story of two Israeli children who hid in a closet for 12 hours to survive October 7 while their parents were killed. [19]

254.1k viewsretweeted @iPrsian, an Iranian woman stating from Iran that they do not want the Islamic Republic and will take to the streets again. [20]

  • ▲ LONG$PSUSPointed a user to buy $PSUS at $38.90 per share to invest in Pershing Square. [5]
  • ▲ LONG$HHHEndorsed $HHH as a Berkshire-style compounder mispriced by the market at ~$62. [4]
  • ▲ LONGNikeBullish on Nike, stating Alex Arnault joining the board will help the company. [6]
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