Welcome to our dedicated page for Anaptysbio SEC filings (Ticker: ANAB), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The AnaptysBio, Inc. (ANAB) SEC filings page on Stock Titan provides access to the company’s regulatory disclosures, including current reports on Form 8-K and other key documents filed with the U.S. Securities and Exchange Commission. As a clinical-stage biotechnology company focused on immunology therapeutics, AnaptysBio uses these filings to report material events related to its clinical programs, collaborations, capital allocation decisions and strategic plans.
Recent Form 8-K filings describe several categories of information. Some filings report results of operations and financial condition, where AnaptysBio furnishes press releases detailing quarterly financial results and business updates. Others fall under Regulation FD disclosure, such as filings that provide updated corporate investor presentations or slide decks used in conference calls discussing programs like ANB033 or the company’s broader pipeline.
Additional 8-Ks highlight other events, including board authorization of amendments to the company’s stock repurchase plan and the board’s approval of plans to explore separating AnaptysBio’s business into two independent, publicly traded companies by the end of 2026. Filings also cover the company’s Verified Complaint in Delaware Chancery Court against Tesaro and GSK concerning the Collaboration and Exclusive License Agreement for Jemperli, as well as references to Tesaro and GSK’s complaint against AnaptysBio.
For investors analyzing ANAB, these filings help clarify how AnaptysBio reports litigation developments, collaboration terms, royalty monetization arrangements, and major strategic decisions. On Stock Titan, SEC documents are paired with AI-powered summaries that explain the main points of each filing in plain language, highlight notable items such as litigation updates or changes to repurchase plans, and make it easier to scan multiple 8-Ks and other forms without reading every line of legal text.
AnaptysBio, Inc. completed the spin-off of its biopharma operations into First Tracks Biotherapeutics, Inc. on April 20, 2026 and is now providing unaudited pro forma financial information reflecting the company after this separation.
The pro forma balance sheet as of December 31, 2025 shows a $100.0 million initial cash distribution to First Tracks, reducing AnaptysBio’s cash and cash equivalents from $238,196 to $138,196 (in thousands). Pro forma 2025 results convert a historical net loss of $13,232 (in thousands) into net income of $114,857 (in thousands), with collaboration revenue of $234,603 (in thousands) and basic pro forma earnings per share of $3.99.
Notes explain that First Tracks is treated as discontinued operations under ASC 205, that AnaptysBio anticipates approximately $7.0 million of additional non-recurring spin-off costs, and that a transition services agreement will add about $2.0 million to general and administrative expenses.
ANAPTYSBIO, INC President and CEO Daniel Faga reported a disposition of derivative securities. He returned 11,000 employee stock options, each exercisable for one share of common stock at $31.12 per share, to the issuer. The filing notes the option was fully vested and exercisable, and this was a non-market disposition back to the company rather than an open-market trade.
ANAPTYSBIO, INC director John A. Orwin reported option adjustments tied to a corporate separation. On April 20, 2026, he received several stock option grants for 8,250, 16,510, 16,510, 10,600, and 3,311 underlying AnaptysBio common shares at exercise prices between $10.87 and $32.17 per share, while corresponding options with higher exercise prices were disposed of back to the issuer.
Footnotes explain that, under a Separation and Distribution Agreement between AnaptysBio and First Tracks, each existing option was adjusted into options for both companies, leading to these new AnaptysBio option positions. Some options are fully vested and exercisable, while others vest monthly starting February 6, 2026.
AnaptysBio director John P. Schmid reported multiple stock option adjustments tied to a corporate separation. On the reported date, he received several option grants to buy AnaptysBio common stock and simultaneously disposed of corresponding options back to the issuer.
A footnote explains that, following a pro rata distribution under a Separation and Distribution Agreement between AnaptysBio and First Tracks, each existing option was split into an option for First Tracks shares and an option for AnaptysBio shares. As a result, Schmid acquired new AnaptysBio options in amounts determined under that agreement. One referenced stock option is fully vested and exercisable, while another vests in 1/12 monthly installments starting on February 6, 2026, contingent on his continued service.
ANAPTYSBIO director Renton Hollings reported a series of stock option adjustments tied to a corporate separation. On April 20, 2026, he acquired multiple new options to buy AnaptysBio common stock and simultaneously disposed of corresponding older options back to the issuer. The footnotes explain that, following a pro rata distribution under a Separation and Distribution Agreement between AnaptysBio and First Tracks, each existing option was split into options over both companies’ shares. These are compensation and structural option changes, all held directly, and involve derivatives only rather than open-market trades in common stock.
ANAPTYSBIO, INC President and CEO Daniel Faga reported compensation-related stock option changes rather than open-market share trades. On April 20, 2026, he both acquired and disposed of multiple employee stock options covering shares of AnaptysBio common stock.
Footnotes explain that, following a pro rata distribution under a Separation and Distribution Agreement between AnaptysBio and First Tracks, each existing option was adjusted so it became an option on both companies’ shares. As a result, Faga acquired new options to buy AnaptysBio common stock at exercise prices such as $10.87, $15.53, $17.02, $22.31, and $32.17 per share, with corresponding dispositions of prior awards back to the issuer.
Several of these options are described as fully vested or vesting 25% on specific January dates with the balance vesting in equal monthly installments over 48 months, contingent on his continued service. The filing reflects grants, adjustments, and issuer-related dispositions of options, not open-market buying or selling of common stock.
AnaptysBio, Inc. completed the spin-off of its former biopharma operations into First Tracks Biotherapeutics, creating a focused royalty management company. Shareholders received one share of First Tracks common stock for every one share of AnaptysBio common stock held on the April 6, 2026 record date. First Tracks now trades on Nasdaq under “TRAX,” while AnaptysBio continues under “ANAB.”
Post-spin, AnaptysBio retains the royalty management business, exclusively overseeing financial collaborations for Jemperli with GSK and imsidolimab with Vanda. Management highlights a virtual model with limited staff, minimal operating expenses and a targeted greater than 95% EBIT margin. The parties entered into a detailed Separation and Distribution Agreement and a Transition Services Agreement governing asset and liability allocations, shared IP, tax matters and up to two years of transition services. The spin-off also triggered board resignations and executive transitions, including the Chief Medical Officer moving to First Tracks and the CEO serving AnaptysBio via a consulting agreement.
ANAPTYSBIO, INC director Susannah Gray filed an initial Form 3 reporting her status as a director of the company. The filing does not list any reportable transactions or equity holdings, indicating this is a baseline disclosure of insider status rather than a trading event.
ANAPTYSBIO director John P. Schmid sold 20,645 shares of Common Stock in open-market transactions. All sales occurred on March 30, 2026 at weighted average prices ranging from $55.7087 to $57.3989 per share, within overall trade ranges of $55.20 to $57.92.
After these sales, Schmid directly holds 31,622 shares of ANAPTYSBIO Common Stock, according to the filing.
ANAPTYSBIO, INC, identified as a ten percent owner of First Tracks Biotherapeutics, Inc., filed an initial ownership report. In connection with the spin-off of First Tracks under a Separation and Distribution Agreement dated April 1, 2026, ANAPTYSBIO owns all 100 outstanding shares of First Tracks common stock.