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: 30 Jun 2026; the date the book describes
Filed: 2 Sep 2026; latest of these filings; the earliest 3 Aug 2026
Managers listing it: 22; at least, of 95 tracked, among listed positions
Comparable managers: 91; filed both Q1 2026 and Q2 2026; 2 listed it in both
Shares listed: 1,622,738; combined, among listed positions
Reported value: $58m; combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 16 buyers (opened or added shares) and 6 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +577,892.

Managers listing ETON in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, 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

22 of 22 holders

				Action		Filing
Woodline Partners LP	310,879	$11m	under 0.1%	Added	+140,180	14 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP	249,182	$9.0m	under 0.1%	Added	+166,461	13 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.	188,452	$6.8m	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)
Jane Street Group LLC	185,697	$6.7m	under 0.1%	Added	+90,277	14 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP	116,291	$4.2m	under 0.1%	Added	+9,898	14 Aug 2026 (the filing on sec.gov)
Walleye Capital LLC	86,249	$3.1m	under 0.1%	Added	+4,286	3 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP	76,103	$2.8m	under 0.1%	Added	+5,979	14 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC	59,562	$2.2m	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC	52,300	$1.9m	under 0.1%	Trimmed	-111,021	13 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC	48,969	$1.8m	under 0.1%	Trimmed	-58,846	2 Sep 2026 (the filing on sec.gov)
Polen Capital Management LLC	45,379	$1.6m	under 0.1%	Added	+15,241	4 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP	44,918	$1.6m	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)
Invesco Ltd	33,384	$1.2m	under 0.1%	Added	+10,510	14 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc	21,932	$794k	under 0.1%	Added	+4,280	14 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP	28,250	$697k	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)
Man Group PLC	16,152	$585k	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC	15,013	$541k	under 0.1%	New	new	13 Aug 2026 (the filing on sec.gov)
PDT Partners LLC	14,891	$539k	under 0.1%	Held	0	14 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP	14,505	$525k	under 0.1%	Trimmed	-19,579	14 Aug 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP	7,955	$288k	under 0.1%	Trimmed	-14,551	14 Aug 2026 (the filing on sec.gov)
Quantbot Technologies LP	4,550	$165k	under 0.1%	Trimmed	-3,237	12 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)	2,125	$77k	under 0.1%	Added	+606	13 Aug 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

D. E. Shaw & Co.new position · 188,452 shares now+188,452
Marshall Wace LLPexisting position · 249,182 shares now+166,461
Woodline Partners LPexisting position · 310,879 shares now+140,180
Jane Street Group LLCexisting position · 185,697 shares now+90,277
Squarepoint Ops LLCnew position · 59,562 shares now+59,562

Reductions

Renaissance Technologies LLCexisting position · 52,300 shares now-111,021
Citadel Advisors LLCexisting position · 48,969 shares now-58,846
Susquehanna International Group LLPexisting position · 14,505 shares now-19,579
Brevan Howard Capital Management LPexisting position · 7,955 shares now-14,551
Quantbot Technologies LPexisting position · 4,550 shares now-3,237

New positions and exits

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

New (6)

Exited (1)

Millennium Management LLCwas $369k

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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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