ETON in the 13F filings

Eton Pharmaceuticals Inc · CUSIP 29772L108

Sector · Pharmaceuticals and biotechnology Theme · Healthcare: biopharma and medtech· L3VLUP-defined Theme · Pharmaceutical preparations

Quarter

Q2 2026 Q1 2026 Q4 2025 Q1 2025

Quarter end: 31 Dec 2025; the date the book describes
Filed: 19 Feb 2026; latest of these filings; the earliest 10 Feb 2026
Managers listing it: 17; at least, of 95 tracked, among listed positions
Comparable managers: 92; filed both Q3 2025 and Q4 2025; 0 listed it in both
Shares listed: 799,816; combined, among listed positions
Reported value: $14m; combined, at the quarter end

Among the 92 comparable managers: 7 buyers (opened or added shares) and 13 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -387,934.

Managers listing ETON in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

ActionShare of book at least

17 of 17 holders

				Action		Filing
Renaissance Technologies LLC	205,700	$3.5m	under 0.1%	Trimmed	-118,921	12 Feb 2026 (the filing on sec.gov)
Woodline Partners LP	95,487	$1.6m	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP	81,201	$1.4m	under 0.1%	Trimmed	-7,018	17 Feb 2026 (the filing on sec.gov)
Millennium Management LLC	79,331	$1.3m	under 0.1%	Added	+63,469	17 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP	76,602	$1.3m	under 0.1%	Trimmed	-209,819	17 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC	74,144	$1.3m	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC	58,056	$982k	under 0.1%	Trimmed	-12,888	12 Feb 2026 (the filing on sec.gov)
Invesco Ltd	19,691	$333k	under 0.1%	Added	+6,213	19 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc	15,369	$260k	under 0.1%	Added	+1,845	17 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.	15,331	$259k	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
PDT Partners LLC	14,891	$252k	under 0.1%	Held	0	17 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP	14,700	$249k	under 0.1%	Trimmed	-154,200	17 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC	13,482	$228k	under 0.1%	Trimmed	-46,163	13 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP	12,925	$219k	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Man Group PLC	10,473	$177k	under 0.1%	Trimmed	-2,176	17 Feb 2026 (the filing on sec.gov)
Quantbot Technologies LP	9,357	$158k	under 0.1%	Trimmed	-2,175	10 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)	3,076	$52k	under 0.1%	Trimmed	-2,618	17 Feb 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

There is no earlier quarter on file to compare with.

Increases

Woodline Partners LPnew position · 95,487 shares now+95,487
Citadel Advisors LLCnew position · 74,144 shares now+74,144
Millennium Management LLCexisting position · 79,331 shares now+63,469
D. E. Shaw & Co.new position · 15,331 shares now+15,331
Point72 Asset Management LPnew position · 12,925 shares now+12,925

Reductions

Two Sigma Investments LPexisting position · 76,602 shares now-209,819
Two Sigma Advisers LPexisting position · 14,700 shares now-154,200
Renaissance Technologies LLCexisting position · 205,700 shares now-118,921
Squarepoint Ops LLCexisting position · 13,482 shares now-46,163
Jane Street Group LLCexisting position · 58,056 shares now-12,888

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (4)

Exited (4)

Winton Group Ltdwas $767k
Susquehanna International Group LLPwas $653k
Acadian Asset Management LLCwas $573k
AllianceBernstein LPwas $209k

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.

1 in Q1 2025 to 2 in Q2 2026

Tracked managers listing it, at least.

the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

ETON and LLY →ETON and JNJ →ETON and VRTX →Choose a stock to compare with ETON →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own ETON, latest filings →Back to the 13F Explorer →

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Illustrative figures. Default values are plausible starting points chosen so a model has somewhere to begin. They are not data, not a view on any company, and not calibrated to anything. Outputs move with whatever you type in.

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Quarter	Holders	Reported value	Buyers	Sellers
Q1 2025	1	$5.2m	1	0
Q4 2025	1	$252k	7	13
Q1 2026	2	$1.1m	11	9
Q2 2026	2	$2.2m	16	6