In Re BioAge Labs, Inc., Securities Litigation

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
UNITED STATES DISTRICT COURT
NORTHERN DISTRICT OF CALIFORNIA
IN RE BIOAGE LABS, INC.,
SECURITIES LITIGATION Case No. 25-cv-00196-RS
ORDER GRANTING DEFENDANTS'
MOTION TO DISMISS WITH LEAVE
TO AMEND
The Southeast Pennsylvania Transportation Authority (“SEPTA”), on behalf of itself and a
putative class of similarly situated investors, sued BioAge Labs and ten of its corporate officers
under two provisions of the Securities Act of 1933, 15 U.S.C. §§ 77k, o. SEPTA alleges that, in
the run-up to its initial public offering, BioAge misled investors by omitting from its registration
statement and prospectus (collectively, the “offering documents”) critical information about the
safety of its leading drug candidate and the concomitant risks to its ongoing Phase 2 clinical trial.
See Dkt. 46 (CAC). BioAge moves to dismiss for failure to state a claim under Rule 12(b)(6). See
Dkt. 50. Because the allegations in the complaint fail plausibly to allege a violation of the
securities laws, Defendants’ motion is granted with leave to amend.
I. BACKGROUND
BioAge is a clinical-stage biopharmaceutical company focused on developing drug
therapies to treat metabolic diseases associated with aging, such as obesity and muscle atrophy.
See CAC ¶ 39. At the time of its initial public offering, BioAge’s lead product candidate was a
small-molecule drug called azelaprag. Azelaprag was originally developed by Amgen as a
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 1 of 10

ORDER GRANTING MOTION TO DISMISS
CASE NO. 25-cv-00196-RS
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
treatment for heart failure. Id. ¶ 52. After Amgen abandoned that use-case, it granted BioAge an
exclusive license to research, develop, and commercialize azelaprag. See id. ¶ 53. In simple terms,
BioAge’s hypothesis was that azelaprag could facilitate weight loss by mimicking the
physiological response to exercise. BioAge estimated that, if successful, azelaprag could be worth
approximately $150 billion by 2031. See id.
Testing of azelaprag proceeded in several phases. It was first tested on mice. See CAC ¶ 56.
As explained in its offering documents, the mouse studies demonstrated that, administered alone,
azelaprag “resulted in significantly improved body composition (% lean, % fat) in mice challenged
in a high-fat diet.” Id. ¶ 58. The mouse studies also showed that when combined with a second drug
called tirzepatide—which regulates blood sugar and appetite—azelaprag “restored body weight and
body composition of obese mice to lean control levels.” Id. ¶ 59. The offering documents did not
report any adverse safety observations from the mouse studies.
After the preclinical mouse studies, azelaprag underwent eight Phase 1 clinical trials which,
in total, involved 265 human participants. CAC ¶ 70. In the offering documents, BioAge represented
that “azelaprag was well-tolerated” in the trials’ participants and exhibited an “overall adverse event
profile . . . comparable to placebo, with no treatment-related trends in adverse events observed, with
the exception of mild, self-limited headaches.” CAC ¶ 70. It further represented that “[n]o serious
adverse events have been reported.” Id.
Roughly two months before its IPO, BioAge announced the start of the STRIDES Phase 2
clinical trial. See CAC ¶ 45. The STRIDES trial’s objective was to test azelaprag in obese
individuals over 55-years old in combination with tirzepatide. See id. BioAge tested four cohorts—
those receiving only azelaprag, those receiving only tirzepatide, those receiving both, and a placebo
group—across multiple dosages. See id. ¶ 48, 112. BioAge said in its offering documents that it
anticipated topline results from the STRIDES trial in the third quarter of 2025. See id. ¶ 48.
The offering documents discussed the risks to its development of azelaprag and,
consequently, BioAge’s commercial prospects. They explained, for instance, that “[BioAge’s]
business could be harmed if results of [its] ongoing or planned clinical trials of azelaprag show
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 2 of 10

ORDER GRANTING MOTION TO DISMISS
CASE NO. 25-cv-00196-RS
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
unexpected adverse events or a lack of efficacy in the indications [it] intend[s] to treat.” CAC ¶ 102.
They further warned investors that “[i]f additional adverse events, serious adverse events (SAEs) or
other side effects are observed in any of [its] clinical trials that are atypical of, or more severe than,
the known side effects of the respective class of agents that each of [its] product candidates are a
part of . . . [it] may be required to abandon those trials or [its] development efforts of one or more
product candidates altogether.” Id.
Buoyed by enthusiasm around azelaprag, BioAge successfully hit the market. It sold 11
million shares at $18 per share, raising a total of $198 million. CAC ¶ 7. Within a month of the
offering, the stock was trading above $25 per share. See id. However, in December 2024—only
about nine weeks after its IPO—BioAge announced that it was discontinuing the STRIDES trial.
On the day of the announcement, BioAge’s stock fell from $20.09 per share to $4.65 per share. See
id. ¶ 115. In January 2025, BioAge confirmed that it had abandoned the development of azelaprag.
See id. The stock has not since recovered.
BioAge reported that it discontinued the STRIDES trial because 11 participants dosed with
azelaprag developed transaminitis. See id. ¶ 112. Transaminitis is characterized by elevated liver
enzyme levels in the blood. See id. ¶ 36–37. Though transaminitis is not itself a disease, it is often
indicative of some kind of injury to the liver. See id. ¶ 36. Transaminitis can have many causes
ranging from serious to benign, including physical exercise and rapid, significant weight loss. See
id. ¶ 37.
SEPTA filed this lawsuit on behalf of itself and other similarly situated investors, averring
that BioAge and the corporate officer defendants are strictly liable for statements in the offering
documents that were either false or misleading. Specifically, SEPTA contends that the offering
documents failed to disclose that transaminitis presented a serious risk to the development and
commercialization of azelaprag. In SEPTA’s telling, transaminitis was “typical, expected, [and
had] already materialized” in the 2018 Amgen Phase 1 clinical trial, making it “virtually certain to
continue to occur in the STRIDES trial.” Dkt. 56 (Opp.), at 1. Defendants have moved dismiss for
failure to state a claim under Rule 12(b)(6). See Dkt. 50.
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 3 of 10

ORDER GRANTING MOTION TO DISMISS
CASE NO. 25-cv-00196-RS
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
II. LEGAL STANDARD
To survive a motion to dismiss under Rule 12(b)(6), the complaint must allege sufficient
facts which, if accepted as true, “state a claim for relief that is plausible on its face.” Bell Atl.
Corp. v. Twombly, 550 U.S. 544, 570 (2007). “A claim has facial plausibility when the plaintiff
pleads factual content that allows the court to draw the reasonable inference that the defendant is
liable for the misconduct alleged.” Ashcroft v. Iqbal, 556 U.S. 662, 678 (2009). “Where a
complaint pleads facts that are ‘merely consistent with’ a defendant’s liability, it ‘stops short of
the line between possibility and plausibility of entitlement to relief.’” Id. (quoting Twombly, 550
U.S. at 557).
SEPTA brings claims under Sections 11 and 15 of the Securities Act of 1933. To state a
claim under Section 11, SEPTA must plausibly aver that the offering documents “contained an
untrue statement of material fact [or omission of] a material fact required to be stated therein or
necessary to make the statements therein not misleading.” 15 U.S.C. § 77k(a); see Rubke v.
Capitol Bancorp Ltd, 551 F.3d 1156, 1161 (9th Cir. 2009). Importantly, Section 11 does not create
liability whenever an issuer withholds material information from the market. Cf. Matrixx
Initiatives, Inc. v. Siracusano, 563 U.S. 27, 45 (2011). Rather, it compels disclosure only where
the information is necessary to make the other statements in the offering documents not
misleading. Cf. id. To state a claim for relief under Section 11, the plaintiff need not prove that the
defendants acted with any intent to deceive or defraud. See Omnicare, Inc. v. Laborers Dist.
Council Const. Industry Pension Fund, 575 U.S. 175, 179 (2015). Section 15 is a derivative
provision which “makes controlling persons jointly and severally liable for violations of the
Securities Act.” Pirani v. Slack Technologies, Inc., 127 F.4th 1183, 1187 (9th Cir. 2025); see 15
U.S.C. § 77o.
III. DISCUSSION
SEPTA’s theory is that BioAge’s failure to disclose the risk that transaminitis would derail
the STRIDES trial rendered its discussion of the risks to the STRIDES trial misleading. That is
because, in its view, transaminitis was not just another possible hazard, it was the hazard—one
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 4 of 10

ORDER GRANTING MOTION TO DISMISS
CASE NO. 25-cv-00196-RS
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
that was “virtually certain” to occur because of the STRIDES trial’s design and the properties of
azelaprag. Opp., at 2. Therefore, SEPTA contends it was simply not possible to discuss accurately
the risk that side effects of azelaprag would impact the STRIDES trial without expressly
disclosing the risk posed by transaminitis.
This theory suffers from two defects—one primarily legal and one primarily factual. The
legal proposition undergirding SEPTA’s theory is that it is fundamentally misleading to fail to
disclose a risk that will inevitably degrade the value of the company’s securities. SEPTA locates
that rule in an out-of-circuit decision, Set Capital LLC v. Credit Suisse Grp. AG, 996 F.3d 64 (2d
Cir. 2021). That case involved disclosures made by Credit Suisse, an investment bank, in
connection with the issuance of certain investment vehicles tied inversely to the volatility of the
public equity markets. See id. at 69. The offering documents spoke equivocally about the risk to
the value of the investment vehicles posed by Credit Suisse’s hedging activity. See id. at 85. It
advised purchasers that while “there can be no assurance” that the value of the investment vehicle
would not be impacted, it had “no reason to believe that [its] . . . hedging activities will have a
material impact on the level of the [investment].” Id. (second alteration in original). That was, as
the Second Circuit put it, a “half-truth.” Id. The complaint plausibly averred that Credit Suisse
“knew with virtual certainty . . . [its] hedging activity would significantly depress the value of the
[investment vehicles]” in part because it had done just that on three prior occasions. See id. at 85–
86. In that context, “cautionary words about future risk” were insufficient because “the risk ha[d],
in fact, materialized in the past and [was] virtually certain to materialize again.” Id. at 85.
Credit Suisse’s liability under Section 11 was created initially by its decision to speak
about the risk posed by hedging. That is, once it decided to talk about hedging, it was obligated
not to mislead investors about the nature of the risk. See id. at 86 (“[T]he Offering Documents
misrepresented Credit Suisse’s knowledge and intent when they warned that Credit Suisse’s
hedging activity ‘could’ or ‘may’ impact prices of [the investment vehicles] but affirmed that
Credit Suisse had ‘no reason to believe’ that it would.”). The opposite, however, is also true: Had
Credit Suisse chosen not to talk about hedging at all, it would have been under no obligation to
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 5 of 10

ORDER GRANTING MOTION TO DISMISS
CASE NO. 25-cv-00196-RS
6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
disclose the risk that its hedging activity would devalue the investment vehicle even if that was
inevitably going to happen.
Therefore, SEPTA must do more than aver that the risk of transaminitis was significant
and inevitable. It must point to a statement in the offering documents that was misleading absent
such a disclosure. Because it has not pointed to any statement minimizing the risk of transaminitis
expressly, it falls back on the contention that inclusion of something implies the exclusion of all
else. In essence, SEPTA argues that by discussing the risk that the STRIDES trial could be
impacted by “unexpected” or “atypical” side effects, it implied that there was no risk of impact
from “expected” or “typical” side effects.
That argument was rejected, however, in In re Rigel Pharmaceuticals, Inc. Sec. Litig., 697
F.3d 869 (9th Cir. 2012). There, a putative class of investor-plaintiffs sued Rigel, a pharmaceutical
corporation, under Section 11 for allegedly misleading disclosures related to a clinical trial of its
lead product candidate. See id. at 871. Rigel elected to publish certain safety-related results from
its clinical trial. See id. at 880. For instance, it published incidents of hypertension that were
moderate or severe, incidents of increased liver enzymes that were at least three times the upper
limit, and incidents of gastrointestinal distress that were moderate or severe. See id. at 880–81.
The plaintiffs contended that those disclosures were misleading because they suggested that they
were the only incidences of the various conditions. To avoid misleading investors, plaintiffs
argued that “once a company chooses to disclose any safety information, it must disclose all
material information regarding safety.” Id. at 880 n.8. The Ninth Circuit, however, rejected that
proposition, describing it as a misconstruction of Supreme Court precedent. See id.
Were it otherwise, Section 11 would effectively include a requirement that issuers disclose
everything on a certain topic once they disclose anything on that topic, lest they be accused of
implying that the unstated information did not exist. Such a requirement would functionally divest
issuers over the control of information that Section 11 grants them. Cf. Matrixx, 563 U.S. at 45
(remarking, in a Section 10b-(5) case, that “[e]ven with respect to information that a reasonable
investor might consider material, companies can control what they have to disclose under these
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 6 of 10

ORDER GRANTING MOTION TO DISMISS
CASE NO. 25-cv-00196-RS
7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
provisions by controlling what they say to the market”); see Rubke v. Capitol Bancorp Ltd, 551
F.3d 1156, 1163 (9th Cir. 2009) (“Section 11 does not require the disclosure of all information a
potential investor might take into account when making his decision . . .”).
At bottom, SEPTA’s theory falls within that which Rigel rejected. SEPTA does not aver
that BioAge disclosed the risk of transaminitis but did so in a misleading way. Nor does it aver
that BioAge selectively presented safety results from its testing of azelaprag. It avers that the risk
disclosures were inherently misleading absent a discussion of transaminitis. That can only be true
if the risk disclosures’ failure to discuss the risk of transaminitis implied that the risk did not exist.
Under Rigel, that is not a viable inference.
Even if it were, the complaint suffers from a second, factual defect. It does not plausibly
plead that transaminitis was inevitable. In SEPTA’s telling, that transaminitis was “virtually
certain” to disrupt the STRIDES trial is evident from three sources: (1) the manifestation of
transaminitis during a 2018 Amgen-led Phase 1 trial of azelaprag, (2) the manifestation of
transaminitis in mice during one of BioAge’s preclinical studies, and (3) the design of the
STRIDES trial itself. None make the asserted inevitability of transaminitis in the STRIDES trial
plausible.
First, SEPTA avers that in one Phase 1 trial, a single participant experienced a grade two
(out of five) increase in a liver enzyme called aspartate aminotransferase and a grade one increase
in another liver enzyme called alanine aminotransferase. CAC ¶ 75–76. That hardly establishes
that transaminitis was “virtually certain” to derail the STRIDES trial. As SETPA acknowledges,
the eight Phase 1 clinical trials involved 265 participants, yet only one manifested any increase in
liver enzyme levels. Even in that single instance, the increase “did not require any treatment” and
“was reported as resolved . . . 22 days after the last dose of the investigational product.” CAC ¶
75. It was so insignificant that it appears to have caused no disruption to Amgen and BioAge’s
Phase 1 trials.
Though SEPTA asserts that BioAge “had a duty to disclose to investors that liver
transaminitis had occurred in a prior Phase 1 study of azelaprag,” Opp., at 15, it fails to show that
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 7 of 10

ORDER GRANTING MOTION TO DISMISS
CASE NO. 25-cv-00196-RS
8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
the offering documents’ discussion of the Phase 1 trial results was misleading without it.
Discussing the results of the Phase 1 trial, the offering documents represented that the “overall
adverse event profile of azelaprag was comparable to placebo, with no treatment-related trends in
adverse events observed, with the exception of mild, self-limited headaches. No serious adverse
events have been reported.” CAC ¶ 54. That was not false or misleading. One observation of
transaminitis does not make a “trend[],” and that observation was definitionally not “serious.” See
CAC ¶ 72 (“describing a grade 1 event as one that “causes mild effects” and a grade 2 event as
“moderate” with “minimal, local or noninvasive intervention indicated”). Certainly, that isolated
observation did not make it likely, much less inevitable, that the STRIDES trial would be
impacted by transaminitis.1
SEPTA’s second argument fares no better. It faults BioAge for failing to disclose that, in a
27-week mouse study, “BioAge purposely tracked liver enzyme levels in mice being dosed with
azelaprag as a monotherapy and, in doing so, identified elevated liver enzyme levels in a cohort of
high-fat diet mice receiving azelaprag.” Opp., at 20. The import of that omission is unclear. The
27-week mouse study tested three cohorts of mice: (1) those on a high-fat diet receiving azelaprag,
(2) those on a high-fat diet not receiving azelaprag, and (3) a lean-diet control group. CAC ¶ 61.
While, as expected, those on a high-fat diet showed elevated liver enzyme levels compared to
those on a lean diet, the mice on a high-fat diet that received azelaprag recorded lower liver
enzyme levels than those on a high-fat diet that did not receive azelaprag. See id. SEPTA’s
assertion that “the cohort that was fed a high-fat diet and received azelaprag showed higher
1 SEPTA also appears to argue that the offering documents’ discussion of the Phase 1 trial results
was false because the individual that experienced the grade 1 and grade 2 liver enzyme episodes
simultaneously experienced a grade 4 increase in blood creatine phosphokinase, a muscle enzyme.
See CAC ¶ 75. A grade 4 event indicates “life-threatening consequences” and necessitates “urgent
intervention.” Id. ¶ 76. Even if omitting that observation rendered the offering documents’
description of the Phase 1 trial results false or misleading, SETPA suffered no damage from that
misstatement. SEPTA does not allege that an increase in muscle enzymes levels had anything to
do with the drop in BioAge’s stock price as it was not the reason BioAge terminated the STRIDES
trial, and Section 11 limits damages to those “resulting from” the false statement or actionable
omission. 15 U.S.C. § 77k(e).
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 8 of 10

ORDER GRANTING MOTION TO DISMISS
CASE NO. 25-cv-00196-RS
9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
elevated liver enzyme level[s] than the mice on the lean diet without azelaprag,” Opp., at 23, is a
comparison of apples to oranges. Nothing in that mouse study suggested that azelaprag caused
transaminitis. In fact, the opposite appears to be true.
Perhaps recognizing its misconstruction of the scientific method, SEPTA avers that the
mere fact that BioAge tested liver enzyme levels in this mouse study “demonstrate[s] that elevated
liver enzymes are a typical or expected result” of azelaprag. CAC ¶ 61. That, too, is misguided.
BioAge’s decision to monitor liver enzyme levels in this longitudinal mouse study shows, at most,
that BioAge once considered meaningful the risk that azelaprag would cause transaminitis. When
the results of the study revealed just the opposite, BioAge likely changed its hypothesis. Nothing
about the mouse studies would have indicated that transaminitis was inevitable in the STRIDES
trial.
Finally, SEPTA contends that the design of the STRIDES trial made transaminitis
“virtually certain” to occur amongst the trial’s participants. The design flaws SEPTA identifies
include: (1) failure to exclude participants with unknown or undiagnosed fatty liver disease, a risk
factor for transaminitis; (2) failure to instruct participants to not do physical exercise, take over-
the-counter medicines such as acetaminophen or naproxen, or consume alcohol—all of which can
increase the risk of transaminitis; (3) testing azelaprag alongside tirzepatide, which can cause
elevated liver enzymes either alone or in combination with azelaprag; (4) attempting to stimulate
weight loss, which itself can cause elevated liver enzymes. See CAC ¶ 85–91.
The averments in the complaint point to design features that made it more likely
transaminitis would appear, but they do not plausibly demonstrate that transaminitis was
inevitable. At various points, SEPTA’s papers nearly concede as much. See, e.g., Opp., at 12
(“[T]ransaminitis is a common health condition . . . that . . . can be triggered by numerous factors
in the STRIDES trial.) (emphasis added); Id., at 15 (describing the risk of transaminitis in the
STRIDES trial as “particularly acute given the combination of obese trial participants and the
agents . . . being utilized”) (emphasis added); CAC ¶ 89 (“[N]owhere in the Offering Documents
was it disclosed that significant or rapid weight loss can also elevate liver enzymes.”) (emphasis
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 9 of 10

ORDER GRANTING MOTION TO DISMISS
CASE NO. 25-cv-00196-RS
10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
United States District Court
Northern District of California
added).
As a last ditch, SEPTA avers that transaminitis had materialized in the STRIDES trial’s
participants by the time of the IPO. CAC ¶ 108–11. That averment is entirely conclusory. Though
it claims to be based on “the proximity of BioAge’s disclosure of elevated liver enzymes to the
commencement of the IPO, the sheer number of trial participants, the commencement of trial
dosing no later than July 29, 2024, the likely duration of time between initial dosing and the onset
of elevated liver enzymes, the design protocol requiring periodic testing of liver enzymes, and the
number of trial participants BioAge contended experienced the transaminitis side effect,” SEPTA
provides no detail about any of those factors that would permit an inference that transaminitis was
observed in the STRIDES trial prior to the IPO. It is unclear, for example, how long the onset
period is or how often BioAge was testing liver enzyme levels. Without that detail, SEPTA’s
claim is too speculative to survive a motion to dismiss.
IV. CONCLUSION
For the foregoing reasons, Defendants’ motion to dismiss is granted. SEPTA is granted
leave to amend its complaint to cure the deficiencies recognized in this order. Any amended
complaint must be filed within 21 days of the date of this order.
IT IS SO ORDERED.
Dated: October 30, 2025
______________________________________
RICHARD SEEBORG
Chief United States District Judge
Case 3:25-cv-00196-RS Document 65 Filed 10/30/25 Page 10 of 10