undamentalytics Newsletter

Inhibrx Biosciences, Inc. insider trading

Every open-market purchase and sale by Inhibrx Biosciences, Inc.'s officers, directors and largest shareholders since November 4, 2021, and what the share price did next.

Insider purchase Insider sale Marker size reflects trade value. Weekly closes adjusted for splits; may be delayed.
Inhibrx Biosciences, Inc. insider open-market trades
DateInsiderTrade SharesPriceValue 1M after 3M after 6M after

From insiders' Form 4 filings with the SEC: open-market purchases and sales only (awards, option exercises and shares withheld for tax are excluded), combined to one line per insider per day. "Plan" marks trades the filing says were made under a pre-set Rule 10b5-1 trading plan, which are scheduled in advance. Price changes run from the close on the trade date; hover a figure for the change relative to the S&P 500. Past moves don't predict future ones.

Does following Inhibrx Biosciences, Inc.’s insiders pay?

From August 22, 2024 to October 14, 2026, 6 insiders reported 17 open-market purchases and 3 sales not made under a pre-set plan in Inhibrx Biosciences, Inc. Twelve months after each purchase was reported, the shares were +103.6% against the S&P 500 on average (median +62.2%), over 10 purchases with a full year of prices; 100% beat the index. After sales, the shares moved +147.8% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on August 23, 2024 into $40,801 by November 2, 2026, +90.7% a year. It held shares 64% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $12,486 (+10.7% a year), and held throughout $13,810 (+16.0%).

$0$20.0k$40.0k$60.0k 202420252026 $40.8k$13.8k$12.5k
Copying Inhibrx Biosciences, Inc.'s insidersS&P 500, same days investedS&P 500, held throughout $10,000 copying every open-market purchase by Inhibrx Biosciences, Inc.'s insiders from August 23, 2024, before costs and taxes, marked weekly. Uninvested money earns the Treasury bill rate; the portfolio held shares 64% of the time.
Inhibrx Biosciences, Inc.: each insider's record
InsiderRolePurchases12 months after their purchasesBeat the S&P 500Sales12 months after their salesLatest report
Lappe Mark Chief Executive Officer 7 +63.1% (4) 100% 0 — October 14, 2026
Kayyem Jon Faiz Director 4 +450.3% (1) 100% 0 — September 23, 2026
Manhard Kimberly Director 1 +58.0% (1) 100% 2 — September 15, 2026
Vuori Kristiina Md Director 3 +64.3% (3) 100% 0 — October 7, 2024
Forsyth Douglas Director 2 +82.4% (1) 100% 0 — September 8, 2026
Viking Global Opportunities Parent Gp LLC 10% owner 0 — — 1 +147.8% (1) October 9, 2025

Moves are the shares’ return including dividends minus the S&P 500’s, from the close on the first trading day after each report; the number of trades with a finished 12-month window is in brackets. Green means the trade went the insider’s way (a purchase ahead of the index, a sale followed by the shares trailing it). A trade reported both by a director or officer and by a fund or company they are linked to counts once here, under the person. Purchases count only where the share price actually traded was at least $5. These figures describe what the shares did, not why anyone traded. Insiders across all companies.

When several insiders traded Inhibrx Biosciences, Inc.

Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Inhibrx Biosciences, Inc. in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After the 1 buying crowd with six months of prices, it averaged −10.1% against the index. One company's history is too short to judge by; the test across every company is the better guide.

MonthCrowd3 months on, vs S&P 5006 months12 months
September 30, 20263 buyingnot yetnot yetnot yet
August 30, 20242 buying−2.4%−10.1%+73.8%

Colours show whether the crowd was right: green when buyers were followed by a rise above the index, or sellers by a fall below it. Total returns from the month end; past patterns are not a forecast.

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