ARVN US Equity

ARVINAS, INC.

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Health Care · Pharmaceutical Preparations · CIK 1655759 · FYE 1231

$8.20

-0.02 (-0.24%)

USD · as of 2026-07-28 · marketstack

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Institutional ownership· 13F filers holding ARVN · 2026-Q1 methodology → sources →

206 holders

% of shares outstanding held

83.9%

Shares held (13F)

54,109,337

Reporting holders

206

Top holders

largest 100 of 206 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	6,797,5846.8M	$72M	10.54%	TRIM -7%
2	VANGUARD PORTFOLIO MANAGEMENT LLC	3,889,6283.9M	$41M	6.03%	NEW†
3	D. E. Shaw & Co., Inc.	3,638,5673.6M	$39M	5.64%	—
4	Pfizer Inc	3,457,8153.5M	$35M	5.36%	—
5	VANGUARD CAPITAL MANAGEMENT LLC	2,689,3622.7M	$29M	4.17%	NEW†
6	TCG Crossover Management, LLC	2,387,4612.4M	$25M	3.70%	TRIM -10%
7	ARMISTICE CAPITAL, LLC	1,978,0002.0M	$21M	3.07%	ADD 10%
8	TWO SIGMA INVESTMENTS, LP	1,832,1141.8M	$19M	2.84%	ADD 85%
9	STATE STREET CORP	1,828,4721.8M	$19M	2.83%	—
10	GEODE CAPITAL MANAGEMENT, LLC	1,557,1071.6M	$17M	2.41%	TRIM -4%
11	JACOBS LEVY EQUITY MANAGEMENT, INC	1,441,5211.4M	$15M	2.23%	ADD 471%
12	Qube Research & Technologies Ltd	1,201,6351.2M	$13M	1.86%	TRIM -9%
13	CITADEL ADVISORS LLC	1,180,9881.2M	$13M	1.83%	ADD 186%
14	FEDERATED HERMES, INC.	1,140,7151.1M	$12M	1.77%	ADD 4%
15	ACADIAN ASSET MANAGEMENT LLC	949,874949,874	$10M	1.47%	TRIM -20%
16	Vestal Point Capital, LP	905,465905,465	$10M	1.40%	NEW
17	GOLDMAN SACHS GROUP INC	756,875756,875	$8M	1.17%	TRIM -32%
18	MORGAN STANLEY	674,718674,718	$7M	1.05%	TRIM -17%
19	MILLENNIUM MANAGEMENT LLC	576,352576,352	$6M	0.89%	TRIM -54%
20	KENNEDY CAPITAL MANAGEMENT LLC	552,641552,641	$6M	0.86%	ADD 25%
21	Nextech Invest, Ltd.	539,394539,394	$6M	0.84%	—
22	TANG CAPITAL MANAGEMENT LLC	538,658538,658	$6M	0.83%	TRIM -5%
23	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	525,174525,174	$6M	0.81%	TRIM -4%
24	NORTHERN TRUST CORP	520,955520,955	$6M	0.81%	TRIM -5%
25	DIMENSIONAL FUND ADVISORS LP	485,764485,764	$5M	0.75%	ADD 3%
26	NORDEA INVESTMENT MANAGEMENT AB	474,503474,503	$5M	0.74%	TRIM -4%
27	PRICE T ROWE ASSOCIATES INC /MD/	427,093427,093	$5M	0.66%	ADD 424%
28	VANGUARD FIDUCIARY TRUST CO	412,596412,596	$4M	0.64%	NEW
29	Nuveen, LLC	406,340406,340	$4M	0.63%	ADD 185%
30	Ikarian Capital, LLC	358,257358,257	$4M	0.56%	—
31	Invesco Ltd.	316,654316,654	$3M	0.49%	ADD 5%
32	SUPERSTRING CAPITAL MANAGEMENT LP	312,620312,620	$3M	0.48%	NEW
33	Susquehanna Portfolio Strategies, LLC	301,245301,245	$3M	0.47%	—
34	Nantahala Capital Management, LLC	300,000300,000	$3M	0.46%	—
35	AQR CAPITAL MANAGEMENT LLC	285,118285,118	$3M	0.44%	TRIM -11%
36	Brummer Multi-Strategy AB	285,076285,076	$3M	0.44%	ADD 71%
37	WASATCH ADVISORS LP	281,857281,857	$3M	0.44%	ADD 5%
38	HRT FINANCIAL LP	270,302270,302	$3M	0.42%	ADD 4%
39	CAXTON ASSOCIATES LLP	260,016260,016	$3M	0.40%	TRIM -43%
40	NOMURA HOLDINGS INC	253,609253,609	$3M	0.39%	NEW
41	ExodusPoint Capital Management, LP	251,012251,012	$3M	0.39%	ADD 33%
42	Bank of New York Mellon Corp	236,714236,714	$3M	0.37%	TRIM -12%
43	Point72 Asset Management, L.P.	229,807229,807	$2M	0.36%	TRIM -90%
44	Rangeley Capital, LLC	223,990223,990	$2M	0.35%	TRIM -43%
45	FRANKLIN RESOURCES INC	216,788216,788	$2M	0.34%	ADD 6%
46	JANE STREET GROUP, LLC	199,908199,908	$2M	0.31%	TRIM -35%
47	AMERIPRISE FINANCIAL INC	185,495185,495	$2M	0.29%	ADD 390%
48	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	180,000180,000	$2M	0.28%	—
49	ALGERT GLOBAL LLC	179,496179,496	$2M	0.28%	TRIM -8%
50	Y-Intercept (Hong Kong) Ltd	172,808172,808	$2M	0.27%	ADD 38%
51	J. Goldman & Co LP	156,799156,799	$2M	0.24%	NEW
52	DEUTSCHE BANK AG\	147,522147,522	$2M	0.23%	—
53	Trexquant Investment LP	146,387146,387	$2M	0.23%	TRIM -63%
54	JPMORGAN CHASE & CO	143,313143,313	$1M	0.22%	ADD 348%
55	Russell Investments Group, Ltd.	137,185137,185	$1M	0.21%	ADD 296%
56	Jump Financial, LLC	133,818133,818	$1M	0.21%	TRIM -29%
57	GSA CAPITAL PARTNERS LLP	133,252133,252	$1M	0.21%	ADD 217%
58	Connor, Clark & Lunn Investment Management Ltd.	131,974131,974	$1M	0.20%	ADD 30%
59	BANK OF AMERICA CORP /DE/	116,800116,800	$1M	0.18%	TRIM -24%
60	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	110,974110,974	$1M	0.17%	TRIM -11%
61	LPL Financial LLC	110,694110,694	$1M	0.17%	—
62	Swiss National Bank	108,000108,000	$1M	0.17%	TRIM -12%
63	PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	97,61197,611	$1M	0.15%	ADD 876%
64	Man Group plc	90,96990,969	$964,271	0.14%	TRIM -9%
65	HSBC HOLDINGS PLC	89,14789,147	$958,025	0.14%	TRIM -40%
66	FMR LLC	88,23288,232	$935,259	0.14%	ADD 369%
67	SG Americas Securities, LLC	86,23186,231	$914,000	0.13%	ADD 10%
68	AMERICAN CENTURY COMPANIES INC	85,49285,492	$906,215	0.13%	ADD 60%
69	Tidal Investments LLC	83,58183,581	$885,959	0.13%	NEW
70	Tema ETFs LLC	83,58183,581	$885,959	0.13%	ADD 71%
71	ALLIANCEBERNSTEIN L.P.	73,72073,720	$874,319	0.11%	—
72	BOOTHBAY FUND MANAGEMENT, LLC	82,48282,482	$874,309	0.13%	—
73	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	81,32281,322	$862,013	0.13%	ADD 171%
74	RHUMBLINE ADVISERS	80,49280,492	$853,207	0.12%	TRIM -8%
75	SEI INVESTMENTS CO	78,58778,587	$833,020	0.12%	ADD 161%
76	Voleon Capital Management LP	75,53775,537	$800,692	0.12%	TRIM -59%
77	MARSHALL WACE, LLP	75,16375,163	$796,728	0.12%	TRIM -77%
78	Quantinno Capital Management LP	74,54074,540	$790,124	0.12%	ADD 13%
79	Zurcher Kantonalbank (Zurich Cantonalbank)	73,85373,853	$782,842	0.11%	ADD 667%
80	Headlands Technologies LLC	73,04373,043	$774,256	0.11%	TRIM -15%
81	PLATINUM INVESTMENT MANAGEMENT LTD	72,52772,527	$768,786	0.11%	—
82	SUSQUEHANNA INTERNATIONAL GROUP, LLP	69,45369,453	$736,202	0.11%	ADD 22%
83	MANGROVE PARTNERS IM, LLC	69,26069,260	$734,156	0.11%	NEW
84	UBS Group AG	68,24668,246	$723,407	0.11%	TRIM -59%
85	ZACKS INVESTMENT MANAGEMENT	66,97866,978	$709,964	0.10%	TRIM -55%
86	GLOBEFLEX CAPITAL L P	59,33159,331	$628,909	0.09%	ADD 433%
87	Creative Planning	58,12058,120	$616,072	0.09%	ADD 2%
88	ADAR1 Capital Management, LLC	57,59157,591	$610,465	0.09%	—
89	Vienna Powszechne Towarzystwo Emerytalne S.A. Vienna Insurance Group	57,50057,500	$609,500	0.09%	—
90	BARCLAYS PLC	56,35756,357	$597,383	0.09%	TRIM -67%
91	WELLS FARGO & COMPANY/MN	53,66353,663	$568,828	0.08%	TRIM -47%
92	Allspring Global Investments Holdings, LLC	51,92351,923	$550,384	0.08%	ADD 11%
93	Longaeva Partners L.P.	50,20550,205	$532,173	0.08%	NEW
94	Yelin Lapidot Holdings Management Ltd.	46,66546,665	$494,649	0.07%	—
95	Legal & General Group Plc	43,35043,350	$459,509	0.07%	TRIM -28%
96	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	43,34143,341	$459,415	0.07%	TRIM -28%
97	XTX Topco Ltd	42,65742,657	$452,164	0.07%	ADD 49%
98	Quinn Opportunity Partners LLC	41,26341,263	$437,388	0.06%	—
99	STRS OHIO	40,40040,400	$428,240	0.06%	ADD 73%
100	Weiss Asset Management LP	36,30536,305	$384,833	0.06%	NEW

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

6.6M

6.2M

6.9M

6.8M

7.3M

6.8M

$72M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

3.9M

$41M

D. E. Shaw & Co., Inc.

—

2.2M

3.3M

3.7M

3.6M

$39M

Pfizer Inc

3.5M

$35M

VANGUARD CAPITAL MANAGEMENT LLC

—

2.7M

$29M

TCG Crossover Management, LLC

—

1.6M

2.7M

2.4M

$25M

ARMISTICE CAPITAL, LLC

—

560K

1.2M

1.8M

2.0M

$21M

TWO SIGMA INVESTMENTS, LP

398K

128K

—

992K

1.8M

$19M

STATE STREET CORP

1.6M

1.9M

1.7M

1.9M

1.8M

$19M

GEODE CAPITAL MANAGEMENT, LLC

1.5M

1.6M

1.7M

1.6M

$17M

JACOBS LEVY EQUITY MANAGEMENT, INC

—

43K

176K

222K

252K

1.4M

$15M

Qube Research & Technologies Ltd

76K

226K

584K

1.5M

1.3M

1.2M

$13M

CITADEL ADVISORS LLC

3.1M

3.9M

3.7M

151K

414K

1.2M

$13M

FEDERATED HERMES, INC.

47K

981K

687K

681K

1.1M

$12M

ACADIAN ASSET MANAGEMENT LLC

—

160K

1.4M

1.5M

1.2M

950K

$10M

Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	206	54,109,337	83.9%	$572M
2025-Q4	204	56,002,921	86.8%	$666M
2025-Q3	211	67,243,665	104.2%	$574M
2025-Q2	215	69,879,493	108.3%	$516M
2025-Q1	216	65,111,638	100.9%	$459M
2024-Q4	199	76,589,866	—	$1.5B
2024-Q3	206	74,745,684	—	$1.8B
2024-Q2	207

Short interest has its own tab now — open SI →

Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.

Activists & large holders· Schedule 13D/G beneficial owners · ARVN

Activists — 13D, active intent

Logos Global Management LP3.4%▼ -5.2ppSCHEDULE 13D/A · Amd 2 · event 2025-10-13SEC →

2,500,000 shares · 8 reporting persons

“The reporting persons acquired the securities for investment purposes. The reporting persons will routinely monitor the Issuer regarding a wide variety of factors that affect their investment considerations, including, current and anticipated future trading prices of the Stock and other securities, the Issuer's operations, assets, prospects, financial position, and business development, Issuer's management, Issuer-related competitive and strategic matters, general economic, financial market and ”

Large holders — 13G, passive (top 5 of 7 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	7.9%	QII	2025-03-31	SEC →
VANGUARD PORTFOLIO MANAGEMENT LLC	6.12%	QII	2026-03-31	SEC →

Institutional ownership· 13F filers holding ARVN · 2026-Q1 methodology → sources →

206 holders

% of shares outstanding held

83.9%

Shares held (13F)

54,109,337

Reporting holders

206

Top holders

largest 100 of 206 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	6,797,5846.8M	$72M	10.54%	TRIM -7%
2	VANGUARD PORTFOLIO MANAGEMENT LLC	3,889,6283.9M	$41M	6.03%	NEW†
3	D. E. Shaw & Co., Inc.	3,638,5673.6M	$39M	5.64%	—
4	Pfizer Inc	3,457,8153.5M	$35M	5.36%	—
5	VANGUARD CAPITAL MANAGEMENT LLC	2,689,3622.7M	$29M	4.17%	NEW†
6	TCG Crossover Management, LLC	2,387,4612.4M	$25M	3.70%	TRIM -10%
7	ARMISTICE CAPITAL, LLC	1,978,0002.0M	$21M	3.07%	ADD 10%
8	TWO SIGMA INVESTMENTS, LP	1,832,1141.8M	$19M	2.84%	ADD 85%
9	STATE STREET CORP	1,828,4721.8M	$19M	2.83%	—
10	GEODE CAPITAL MANAGEMENT, LLC	1,557,1071.6M	$17M	2.41%	TRIM -4%
11	JACOBS LEVY EQUITY MANAGEMENT, INC	1,441,5211.4M	$15M	2.23%	ADD 471%
12	Qube Research & Technologies Ltd	1,201,6351.2M	$13M	1.86%	TRIM -9%
13	CITADEL ADVISORS LLC	1,180,9881.2M	$13M	1.83%	ADD 186%
14	FEDERATED HERMES, INC.	1,140,7151.1M	$12M	1.77%	ADD 4%
15	ACADIAN ASSET MANAGEMENT LLC	949,874949,874	$10M	1.47%	TRIM -20%
16	Vestal Point Capital, LP	905,465905,465	$10M	1.40%	NEW
17	GOLDMAN SACHS GROUP INC	756,875756,875	$8M	1.17%	TRIM -32%
18	MORGAN STANLEY	674,718674,718	$7M	1.05%	TRIM -17%
19	MILLENNIUM MANAGEMENT LLC	576,352576,352	$6M	0.89%	TRIM -54%
20	KENNEDY CAPITAL MANAGEMENT LLC	552,641552,641	$6M	0.86%	ADD 25%
21	Nextech Invest, Ltd.	539,394539,394	$6M	0.84%	—
22	TANG CAPITAL MANAGEMENT LLC	538,658538,658	$6M	0.83%	TRIM -5%
23	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	525,174525,174	$6M	0.81%	TRIM -4%
24	NORTHERN TRUST CORP	520,955520,955	$6M	0.81%	TRIM -5%
25	DIMENSIONAL FUND ADVISORS LP	485,764485,764	$5M	0.75%	ADD 3%
26	NORDEA INVESTMENT MANAGEMENT AB	474,503474,503	$5M	0.74%	TRIM -4%
27	PRICE T ROWE ASSOCIATES INC /MD/	427,093427,093	$5M	0.66%	ADD 424%
28	VANGUARD FIDUCIARY TRUST CO	412,596412,596	$4M	0.64%	NEW
29	Nuveen, LLC	406,340406,340	$4M	0.63%	ADD 185%
30	Ikarian Capital, LLC	358,257358,257	$4M	0.56%	—
31	Invesco Ltd.	316,654316,654	$3M	0.49%	ADD 5%
32	SUPERSTRING CAPITAL MANAGEMENT LP	312,620312,620	$3M	0.48%	NEW
33	Susquehanna Portfolio Strategies, LLC	301,245301,245	$3M	0.47%	—
34	Nantahala Capital Management, LLC	300,000300,000	$3M	0.46%	—
35	AQR CAPITAL MANAGEMENT LLC	285,118285,118	$3M	0.44%	TRIM -11%
36	Brummer Multi-Strategy AB	285,076285,076	$3M	0.44%	ADD 71%
37	WASATCH ADVISORS LP	281,857281,857	$3M	0.44%	ADD 5%
38	HRT FINANCIAL LP	270,302270,302	$3M	0.42%	ADD 4%
39	CAXTON ASSOCIATES LLP	260,016260,016	$3M	0.40%	TRIM -43%
40	NOMURA HOLDINGS INC	253,609253,609	$3M	0.39%	NEW
41	ExodusPoint Capital Management, LP	251,012251,012	$3M	0.39%	ADD 33%
42	Bank of New York Mellon Corp	236,714236,714	$3M	0.37%	TRIM -12%
43	Point72 Asset Management, L.P.	229,807229,807	$2M	0.36%	TRIM -90%
44	Rangeley Capital, LLC	223,990223,990	$2M	0.35%	TRIM -43%
45	FRANKLIN RESOURCES INC	216,788216,788	$2M	0.34%	ADD 6%
46	JANE STREET GROUP, LLC	199,908199,908	$2M	0.31%	TRIM -35%
47	AMERIPRISE FINANCIAL INC	185,495185,495	$2M	0.29%	ADD 390%
48	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	180,000180,000	$2M	0.28%	—
49	ALGERT GLOBAL LLC	179,496179,496	$2M	0.28%	TRIM -8%
50	Y-Intercept (Hong Kong) Ltd	172,808172,808	$2M	0.27%	ADD 38%
51	J. Goldman & Co LP	156,799156,799	$2M	0.24%	NEW
52	DEUTSCHE BANK AG\	147,522147,522	$2M	0.23%	—
53	Trexquant Investment LP	146,387146,387	$2M	0.23%	TRIM -63%
54	JPMORGAN CHASE & CO	143,313143,313	$1M	0.22%	ADD 348%
55	Russell Investments Group, Ltd.	137,185137,185	$1M	0.21%	ADD 296%
56	Jump Financial, LLC	133,818133,818	$1M	0.21%	TRIM -29%
57	GSA CAPITAL PARTNERS LLP	133,252133,252	$1M	0.21%	ADD 217%
58	Connor, Clark & Lunn Investment Management Ltd.	131,974131,974	$1M	0.20%	ADD 30%
59	BANK OF AMERICA CORP /DE/	116,800116,800	$1M	0.18%	TRIM -24%
60	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	110,974110,974	$1M	0.17%	TRIM -11%
61	LPL Financial LLC	110,694110,694	$1M	0.17%	—
62	Swiss National Bank	108,000108,000	$1M	0.17%	TRIM -12%
63	PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	97,61197,611	$1M	0.15%	ADD 876%
64	Man Group plc	90,96990,969	$964,271	0.14%	TRIM -9%
65	HSBC HOLDINGS PLC	89,14789,147	$958,025	0.14%	TRIM -40%
66	FMR LLC	88,23288,232	$935,259	0.14%	ADD 369%
67	SG Americas Securities, LLC	86,23186,231	$914,000	0.13%	ADD 10%
68	AMERICAN CENTURY COMPANIES INC	85,49285,492	$906,215	0.13%	ADD 60%
69	Tidal Investments LLC	83,58183,581	$885,959	0.13%	NEW
70	Tema ETFs LLC	83,58183,581	$885,959	0.13%	ADD 71%
71	ALLIANCEBERNSTEIN L.P.	73,72073,720	$874,319	0.11%	—
72	BOOTHBAY FUND MANAGEMENT, LLC	82,48282,482	$874,309	0.13%	—
73	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	81,32281,322	$862,013	0.13%	ADD 171%
74	RHUMBLINE ADVISERS	80,49280,492	$853,207	0.12%	TRIM -8%
75	SEI INVESTMENTS CO	78,58778,587	$833,020	0.12%	ADD 161%
76	Voleon Capital Management LP	75,53775,537	$800,692	0.12%	TRIM -59%
77	MARSHALL WACE, LLP	75,16375,163	$796,728	0.12%	TRIM -77%
78	Quantinno Capital Management LP	74,54074,540	$790,124	0.12%	ADD 13%
79	Zurcher Kantonalbank (Zurich Cantonalbank)	73,85373,853	$782,842	0.11%	ADD 667%
80	Headlands Technologies LLC	73,04373,043	$774,256	0.11%	TRIM -15%
81	PLATINUM INVESTMENT MANAGEMENT LTD	72,52772,527	$768,786	0.11%	—
82	SUSQUEHANNA INTERNATIONAL GROUP, LLP	69,45369,453	$736,202	0.11%	ADD 22%
83	MANGROVE PARTNERS IM, LLC	69,26069,260	$734,156	0.11%	NEW
84	UBS Group AG	68,24668,246	$723,407	0.11%	TRIM -59%
85	ZACKS INVESTMENT MANAGEMENT	66,97866,978	$709,964	0.10%	TRIM -55%
86	GLOBEFLEX CAPITAL L P	59,33159,331	$628,909	0.09%	ADD 433%
87	Creative Planning	58,12058,120	$616,072	0.09%	ADD 2%
88	ADAR1 Capital Management, LLC	57,59157,591	$610,465	0.09%	—
89	Vienna Powszechne Towarzystwo Emerytalne S.A. Vienna Insurance Group	57,50057,500	$609,500	0.09%	—
90	BARCLAYS PLC	56,35756,357	$597,383	0.09%	TRIM -67%
91	WELLS FARGO & COMPANY/MN	53,66353,663	$568,828	0.08%	TRIM -47%
92	Allspring Global Investments Holdings, LLC	51,92351,923	$550,384	0.08%	ADD 11%
93	Longaeva Partners L.P.	50,20550,205	$532,173	0.08%	NEW
94	Yelin Lapidot Holdings Management Ltd.	46,66546,665	$494,649	0.07%	—
95	Legal & General Group Plc	43,35043,350	$459,509	0.07%	TRIM -28%
96	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	43,34143,341	$459,415	0.07%	TRIM -28%
97	XTX Topco Ltd	42,65742,657	$452,164	0.07%	ADD 49%
98	Quinn Opportunity Partners LLC	41,26341,263	$437,388	0.06%	—
99	STRS OHIO	40,40040,400	$428,240	0.06%	ADD 73%
100	Weiss Asset Management LP	36,30536,305	$384,833	0.06%	NEW

† a filer this large appearing as NEW usually reflects a renamed or succeeded filing entity (the old name stops filing the same quarter) — not a brand-new position.

Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.

Holder trends· top 15 holders · shares held over 6 quarters

green added · red trimmed

Holder

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

BlackRock, Inc.

6.6M

6.2M

6.9M

6.8M

7.3M

6.8M

$72M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

3.9M

$41M

D. E. Shaw & Co., Inc.

—

2.2M

3.3M

3.7M

3.6M

$39M

Pfizer Inc

3.5M

$35M

VANGUARD CAPITAL MANAGEMENT LLC

—

2.7M

$29M

TCG Crossover Management, LLC

—

1.6M

2.7M

2.4M

$25M

ARMISTICE CAPITAL, LLC

—

560K

1.2M

1.8M

2.0M

$21M

TWO SIGMA INVESTMENTS, LP

398K

128K

—

992K

1.8M

$19M

STATE STREET CORP

1.6M

1.9M

1.7M

1.9M

1.8M

$19M

GEODE CAPITAL MANAGEMENT, LLC

1.5M

1.6M

1.7M

1.6M

$17M

JACOBS LEVY EQUITY MANAGEMENT, INC

—

43K

176K

222K

252K

1.4M

$15M

Qube Research & Technologies Ltd

76K

226K

584K

1.5M

1.3M

1.2M

$13M

CITADEL ADVISORS LLC

3.1M

3.9M

3.7M

151K

414K

1.2M

$13M

FEDERATED HERMES, INC.

47K

981K

687K

681K

1.1M

$12M

ACADIAN ASSET MANAGEMENT LLC

—

160K

1.4M

1.5M

1.2M

950K

$10M

Institutional footprint by quarter

Line breaks are honest gaps — quarters with no 13F record, or a suppressed % — never interpolated. % of shares outstanding uses today's share count for every quarter (the only count stored).

Quarter	Holders	Shares held	% shares out	Value held
2026-Q1	206	54,109,337	83.9%	$572M
2025-Q4	204	56,002,921	86.8%	$666M
2025-Q3	211	67,243,665	104.2%	$574M
2025-Q2	215	69,879,493	108.3%	$516M
2025-Q1	216	65,111,638	100.9%	$459M
2024-Q4	199	76,589,866	—	$1.5B
2024-Q3	206	74,745,684	—	$1.8B
2024-Q2	207

Short interest has its own tab now — open SI →

Activists & large holders· Schedule 13D/G beneficial owners · ARVN

Activists — 13D, active intent

Logos Global Management LP3.4%▼ -5.2ppSCHEDULE 13D/A · Amd 2 · event 2025-10-13SEC →

2,500,000 shares · 8 reporting persons

Large holders — 13G, passive (top 5 of 7 by % of class)

Holder	% of class	Type	As of
BlackRock, Inc.	7.9%	QII	2025-03-31	SEC →
VANGUARD PORTFOLIO MANAGEMENT LLC	6.12%	QII	2026-03-31	SEC →

ARVN US Equity☆

Institutional ownership· 13F filers holding ARVN · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · ARVN

Institutional ownership· 13F filers holding ARVN · 2026-Q1 methodology → sources →

Top holders

Holder trends· top 15 holders · shares held over 6 quarters

Institutional footprint by quarter

Activists & large holders· Schedule 13D/G beneficial owners · ARVN

ARVN US Equity