MEDP US Equity

Medpace Holdings, Inc.

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Health Care · Services-Commercial Physical & Biological Research · CIK 1668397 · FYE 1231

$584.93

+13.96 (+2.44%)

USD · as of 2026-07-29 · marketstack

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

725 holders

% of shares outstanding held

86.1%

Shares held (13F)

24,038,818

Reporting holders

725

Top holders

largest 100 of 725 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	2,470,4402.5M	$1.2B	8.85%	ADD 2%
2	AQR CAPITAL MANAGEMENT LLC	1,353,8371.4M	$634M	4.85%	—
3	VANGUARD PORTFOLIO MANAGEMENT LLC	1,121,6891.1M	$539M	4.02%	NEW†
4	VANGUARD CAPITAL MANAGEMENT LLC	1,011,0711.0M	$486M	3.62%	NEW†
5	WASATCH ADVISORS LP	773,931773,931	$372M	2.77%	ADD 19%
6	GEODE CAPITAL MANAGEMENT, LLC	745,106745,106	$358M	2.67%	ADD 12%
7	STATE STREET CORP	682,229682,229	$328M	2.44%	ADD 3%
8	Invesco Ltd.	577,574577,574	$277M	2.07%	ADD 20%
9	RENAISSANCE TECHNOLOGIES LLC	504,668504,668	$242M	1.81%	ADD 8%
10	BAILLIE GIFFORD & CO	503,191503,191	$242M	1.80%	TRIM -8%
11	Mawer Investment Management Ltd.	446,104446,104	$214M	1.60%	ADD 10%
12	D. E. Shaw & Co., Inc.	432,602432,602	$208M	1.55%	TRIM -18%
13	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	395,769395,769	$190M	1.42%	ADD 6%
14	DIMENSIONAL FUND ADVISORS LP	348,485348,485	$167M	1.25%	TRIM -3%
15	UBS Group AG	340,433340,433	$163M	1.22%	ADD 4%
16	PRICE T ROWE ASSOCIATES INC /MD/	289,507289,507	$139M	1.04%	ADD 148%
17	MORGAN STANLEY	288,422288,422	$138M	1.03%	TRIM -31%
18	BESSEMER GROUP INC	285,431285,431	$137M	1.02%	TRIM -10%
19	Madison Asset Management, LLC	262,293262,293	$126M	0.94%	TRIM -6%
20	Giverny Capital Inc.	256,081256,081	$123M	0.92%	TRIM -3%
21	RIVERBRIDGE PARTNERS LLC	237,407237,407	$114M	0.85%	TRIM -13%
22	Thrivent Financial for Lutherans	231,492231,492	$111M	0.83%	ADD 85%
23	NORTHERN TRUST CORP	226,280226,280	$109M	0.81%	ADD 3%
24	AMERICAN CAPITAL MANAGEMENT INC	217,947217,947	$105M	0.78%	TRIM -3%
25	BANK OF AMERICA CORP /DE/	212,183212,183	$102M	0.76%	—
26	Vulcan Value Partners, LLC	203,068203,068	$98M	0.73%	ADD 329%
27	FRANKLIN RESOURCES INC	201,711201,711	$97M	0.72%	TRIM -33%
28	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	196,513196,513	$94M	0.70%	ADD 4%
29	GW&K Investment Management, LLC	182,772182,772	$88M	0.65%	ADD 17%
30	TWO SIGMA INVESTMENTS, LP	176,557176,557	$85M	0.63%	ADD 208%
31	Clearbridge Investments, LLC	175,966175,966	$84M	0.63%	TRIM -14%
32	NATIXIS ADVISORS, LLC	174,715174,715	$84M	0.63%	ADD 7%
33	GOLDMAN SACHS GROUP INC	168,487168,487	$81M	0.60%	TRIM -51%
34	Stephens Investment Management Group LLC	162,797162,797	$78M	0.58%	ADD 37%
35	FMR LLC	160,585160,585	$77M	0.58%	TRIM -21%
36	Bank of New York Mellon Corp	159,240159,240	$76M	0.57%	—
37	JONES FINANCIAL COMPANIES LLLP	168,195168,195	$76M	0.60%	ADD 16553%
38	JPMORGAN CHASE & CO	153,606153,606	$71M	0.55%	ADD 13%
39	VANGUARD FIDUCIARY TRUST CO	142,535142,535	$68M	0.51%	NEW
40	Epoch Investment Partners, Inc.	140,959140,959	$68M	0.51%	ADD 387%
41	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	140,807140,807	$68M	0.50%	ADD 20%
42	Boston Trust Walden Corp	140,610140,610	$68M	0.50%	TRIM -5%
43	Fisher Asset Management, LLC	135,712135,712	$65M	0.49%	TRIM -2%
44	TURTLE CREEK ASSET MANAGEMENT INC.	135,570135,570	$65M	0.49%	ADD 4742%
45	Connor, Clark & Lunn Investment Management Ltd.	134,838134,838	$65M	0.48%	TRIM -5%
46	TD Asset Management Inc	133,053133,053	$64M	0.48%	ADD 158%
47	ENVESTNET ASSET MANAGEMENT INC	133,024133,024	$64M	0.48%	ADD 6%
48	Caisse de depot et placement du Quebec	130,249130,249	$63M	0.47%	ADD 62%
49	RAYMOND JAMES FINANCIAL INC	131,373131,373	$62M	0.47%	ADD 47%
50	JANUS HENDERSON GROUP PLC	124,954124,954	$60M	0.45%	ADD 21%
51	ROYAL BANK OF CANADA	123,929123,929	$60M	0.44%	ADD 3%
52	Assenagon Asset Management S.A.	116,323116,323	$56M	0.42%	ADD 1500%
53	NORDEA INVESTMENT MANAGEMENT AB	113,462113,462	$53M	0.41%	ADD 78%
54	Smith Group Asset Management, LLC	103,603103,603	$50M	0.37%	ADD 9%
55	Candriam S.C.A.	103,349103,349	$50M	0.37%	ADD 165%
56	AMERIPRISE FINANCIAL INC	102,418102,418	$49M	0.37%	TRIM -18%
57	Annex Advisory Services, LLC	94,65694,656	$45M	0.34%	ADD 3%
58	CITIGROUP INC	93,99993,999	$45M	0.34%	—
59	Nuveen, LLC	88,53788,537	$43M	0.32%	—
60	MAIRS & POWER INC	85,72085,720	$41M	0.31%	ADD 29%
61	Cerity Partners LLC	82,07782,077	$39M	0.29%	—
62	ARGENT CAPITAL MANAGEMENT LLC	76,59076,590	$37M	0.27%	—
63	DF DENT & CO INC	74,81074,810	$36M	0.27%	ADD 37%
64	VOLORIDGE INVESTMENT MANAGEMENT, LLC	74,73074,730	$36M	0.27%	TRIM -46%
65	FULLER & THALER ASSET MANAGEMENT, INC.	73,65573,655	$35M	0.26%	TRIM -52%
66	Man Group plc	68,27268,272	$33M	0.24%	TRIM -14%
67	IEQ CAPITAL, LLC	66,04466,044	$32M	0.24%	TRIM -31%
68	FIRST TRUST ADVISORS LP	64,67764,677	$31M	0.23%	TRIM -4%
69	RHUMBLINE ADVISERS	63,64063,640	$31M	0.23%	ADD 3%
70	Retirement Systems of Alabama	63,35163,351	$30M	0.23%	—
71	Russell Investments Group, Ltd.	62,75062,750	$30M	0.22%	ADD 5%
72	BARCLAYS PLC	62,70762,707	$30M	0.22%	ADD 109%
73	Fundsmith LLPtracked	62,66862,668	$30M	0.22%	TRIM -24%
74	Amundi	61,13961,139	$29M	0.22%	ADD 1488%
75	CONGRESS ASSET MANAGEMENT CO	60,18760,187	$29M	0.22%	—
76	PANAGORA ASSET MANAGEMENT INC	60,02860,028	$29M	0.22%	ADD 10%
77	Squarepoint Ops LLC	58,87558,875	$28M	0.21%	ADD 76%
78	Spyglass Capital Management LLC	55,75555,755	$27M	0.20%	TRIM -19%
79	SEI INVESTMENTS CO	55,42155,421	$27M	0.20%	TRIM -38%
80	CANADA PENSION PLAN INVESTMENT BOARD	54,59454,594	$26M	0.20%	ADD 158%
81	RICE HALL JAMES & ASSOCIATES, LLC	53,98353,983	$26M	0.19%	TRIM -14%
82	California Public Employees Retirement System	52,36352,363	$25M	0.19%	ADD 9%
83	BI Asset Management Fondsmaeglerselskab A/S	51,59851,598	$25M	0.18%	ADD 247%
84	VICTORY CAPITAL MANAGEMENT INC	50,95150,951	$24M	0.18%	ADD 2%
85	PRINCIPAL FINANCIAL GROUP INC	50,44250,442	$24M	0.18%	ADD 6%
86	Heron Bay Capital Management	50,29350,293	$24M	0.18%	ADD 159%
87	NewEdge Wealth, LLC	49,77749,777	$24M	0.18%	ADD 1045%
88	Ranger Investment Management, L.P.	48,35748,357	$23M	0.17%	—
89	WELLINGTON MANAGEMENT GROUP LLP	48,22248,222	$23M	0.17%	—
90	WELLS FARGO & COMPANY/MN	48,05648,056	$23M	0.17%	ADD 7%
91	LPL Financial LLC	45,83045,830	$22M	0.16%	ADD 24%
92	LOS ANGELES CAPITAL MANAGEMENT LLC	45,68645,686	$22M	0.16%	TRIM -49%
93	CAPTRUST FINANCIAL ADVISORS	44,56544,565	$21M	0.16%	—
94	Swiss National Bank	44,48044,480	$21M	0.16%	—
95	Aberdeen Group plc	42,74842,748	$21M	0.15%	—
96	Balyasny Asset Management L.P.	42,29342,293	$20M	0.15%	NEW
97	Bridgewater Associates, LP	41,13541,135	$20M	0.15%	ADD 20%
98	Legal & General Group Plc	40,57940,579	$19M	0.15%	TRIM -8%
99	Crow's Nest Holdings LP	40,00040,000	$19M	0.14%	NEW
100	Mariner, LLC	39,97739,977	$19M	0.14%	ADD 6%

† 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.

2.7M

2.5M

2.4M

2.5M

$1.2B

AQR CAPITAL MANAGEMENT LLC

480K

540K

621K

1.0M

1.3M

1.4M

$634M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

1.1M

$539M

VANGUARD CAPITAL MANAGEMENT LLC

—

1.0M

$486M

WASATCH ADVISORS LP

937K

829K

946K

926K

648K

774K

$372M

GEODE CAPITAL MANAGEMENT, LLC

656K

668K

638K

643K

667K

745K

$358M

STATE STREET CORP

780K

783K

707K

673K

665K

682K

$328M

Invesco Ltd.

1.1M

1.2M

452K

537K

483K

578K

$277M

RENAISSANCE TECHNOLOGIES LLC

554K

578K

678K

494K

466K

505K

$242M

BAILLIE GIFFORD & CO

14K

522K

585K

547K

503K

$242M

Mawer Investment Management Ltd.

—

696K

817K

647K

407K

446K

$214M

D. E. Shaw & Co., Inc.

178K

214K

344K

600K

528K

433K

$208M

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

102K

82K

103K

314K

375K

396K

$190M

DIMENSIONAL FUND ADVISORS LP

268K

332K

414K

388K

359K

348K

$167M

UBS Group AG

160K

186K

274K

248K

329K

340K

$163M

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	725	24,038,818	86.1%	$11.5B
2025-Q4	782	23,839,680	85.4%	$13.4B
2025-Q3	673	24,156,098	86.5%	$12.4B
2025-Q2	602	26,490,532	94.9%	$8.3B
2025-Q1	585	25,525,754	91.5%	$7.8B

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 · MEDP

Activists — 13D, active intent

Troendle August J.20%▲ +0.5ppSCHEDULE 13D/A · Amd 23 · event 2025-11-26SEC →

5,682,934 shares · 2 reporting persons

Large holders — 13G, passive (top 1 by % of class)

Holder

% of class

Type

As of

VANGUARD GROUP INC

QII

2026-03-13

SEC →

Source: SEC Schedule 13D/13G structured XML. 13D = active intent; 13G filers report passively (Rule 13d-1(b) QII / 13d-1(c) Passive / 13d-1(d) Exempt) and are not activists. Percent and delta are the group aggregate the filing reports. Structured 13D/G coverage begins December 2024 (SEC XML mandate).

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

725 holders

% of shares outstanding held

86.1%

Shares held (13F)

24,038,818

Reporting holders

725

Top holders

largest 100 of 725 · Δ vs 2025-Q4

#	Holder	Shares	Value	% of shares out	Δ QoQ
1	BlackRock, Inc.	2,470,4402.5M	$1.2B	8.85%	ADD 2%
2	AQR CAPITAL MANAGEMENT LLC	1,353,8371.4M	$634M	4.85%	—
3	VANGUARD PORTFOLIO MANAGEMENT LLC	1,121,6891.1M	$539M	4.02%	NEW†
4	VANGUARD CAPITAL MANAGEMENT LLC	1,011,0711.0M	$486M	3.62%	NEW†
5	WASATCH ADVISORS LP	773,931773,931	$372M	2.77%	ADD 19%
6	GEODE CAPITAL MANAGEMENT, LLC	745,106745,106	$358M	2.67%	ADD 12%
7	STATE STREET CORP	682,229682,229	$328M	2.44%	ADD 3%
8	Invesco Ltd.	577,574577,574	$277M	2.07%	ADD 20%
9	RENAISSANCE TECHNOLOGIES LLC	504,668504,668	$242M	1.81%	ADD 8%
10	BAILLIE GIFFORD & CO	503,191503,191	$242M	1.80%	TRIM -8%
11	Mawer Investment Management Ltd.	446,104446,104	$214M	1.60%	ADD 10%
12	D. E. Shaw & Co., Inc.	432,602432,602	$208M	1.55%	TRIM -18%
13	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	395,769395,769	$190M	1.42%	ADD 6%
14	DIMENSIONAL FUND ADVISORS LP	348,485348,485	$167M	1.25%	TRIM -3%
15	UBS Group AG	340,433340,433	$163M	1.22%	ADD 4%
16	PRICE T ROWE ASSOCIATES INC /MD/	289,507289,507	$139M	1.04%	ADD 148%
17	MORGAN STANLEY	288,422288,422	$138M	1.03%	TRIM -31%
18	BESSEMER GROUP INC	285,431285,431	$137M	1.02%	TRIM -10%
19	Madison Asset Management, LLC	262,293262,293	$126M	0.94%	TRIM -6%
20	Giverny Capital Inc.	256,081256,081	$123M	0.92%	TRIM -3%
21	RIVERBRIDGE PARTNERS LLC	237,407237,407	$114M	0.85%	TRIM -13%
22	Thrivent Financial for Lutherans	231,492231,492	$111M	0.83%	ADD 85%
23	NORTHERN TRUST CORP	226,280226,280	$109M	0.81%	ADD 3%
24	AMERICAN CAPITAL MANAGEMENT INC	217,947217,947	$105M	0.78%	TRIM -3%
25	BANK OF AMERICA CORP /DE/	212,183212,183	$102M	0.76%	—
26	Vulcan Value Partners, LLC	203,068203,068	$98M	0.73%	ADD 329%
27	FRANKLIN RESOURCES INC	201,711201,711	$97M	0.72%	TRIM -33%
28	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	196,513196,513	$94M	0.70%	ADD 4%
29	GW&K Investment Management, LLC	182,772182,772	$88M	0.65%	ADD 17%
30	TWO SIGMA INVESTMENTS, LP	176,557176,557	$85M	0.63%	ADD 208%
31	Clearbridge Investments, LLC	175,966175,966	$84M	0.63%	TRIM -14%
32	NATIXIS ADVISORS, LLC	174,715174,715	$84M	0.63%	ADD 7%
33	GOLDMAN SACHS GROUP INC	168,487168,487	$81M	0.60%	TRIM -51%
34	Stephens Investment Management Group LLC	162,797162,797	$78M	0.58%	ADD 37%
35	FMR LLC	160,585160,585	$77M	0.58%	TRIM -21%
36	Bank of New York Mellon Corp	159,240159,240	$76M	0.57%	—
37	JONES FINANCIAL COMPANIES LLLP	168,195168,195	$76M	0.60%	ADD 16553%
38	JPMORGAN CHASE & CO	153,606153,606	$71M	0.55%	ADD 13%
39	VANGUARD FIDUCIARY TRUST CO	142,535142,535	$68M	0.51%	NEW
40	Epoch Investment Partners, Inc.	140,959140,959	$68M	0.51%	ADD 387%
41	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	140,807140,807	$68M	0.50%	ADD 20%
42	Boston Trust Walden Corp	140,610140,610	$68M	0.50%	TRIM -5%
43	Fisher Asset Management, LLC	135,712135,712	$65M	0.49%	TRIM -2%
44	TURTLE CREEK ASSET MANAGEMENT INC.	135,570135,570	$65M	0.49%	ADD 4742%
45	Connor, Clark & Lunn Investment Management Ltd.	134,838134,838	$65M	0.48%	TRIM -5%
46	TD Asset Management Inc	133,053133,053	$64M	0.48%	ADD 158%
47	ENVESTNET ASSET MANAGEMENT INC	133,024133,024	$64M	0.48%	ADD 6%
48	Caisse de depot et placement du Quebec	130,249130,249	$63M	0.47%	ADD 62%
49	RAYMOND JAMES FINANCIAL INC	131,373131,373	$62M	0.47%	ADD 47%
50	JANUS HENDERSON GROUP PLC	124,954124,954	$60M	0.45%	ADD 21%
51	ROYAL BANK OF CANADA	123,929123,929	$60M	0.44%	ADD 3%
52	Assenagon Asset Management S.A.	116,323116,323	$56M	0.42%	ADD 1500%
53	NORDEA INVESTMENT MANAGEMENT AB	113,462113,462	$53M	0.41%	ADD 78%
54	Smith Group Asset Management, LLC	103,603103,603	$50M	0.37%	ADD 9%
55	Candriam S.C.A.	103,349103,349	$50M	0.37%	ADD 165%
56	AMERIPRISE FINANCIAL INC	102,418102,418	$49M	0.37%	TRIM -18%
57	Annex Advisory Services, LLC	94,65694,656	$45M	0.34%	ADD 3%
58	CITIGROUP INC	93,99993,999	$45M	0.34%	—
59	Nuveen, LLC	88,53788,537	$43M	0.32%	—
60	MAIRS & POWER INC	85,72085,720	$41M	0.31%	ADD 29%
61	Cerity Partners LLC	82,07782,077	$39M	0.29%	—
62	ARGENT CAPITAL MANAGEMENT LLC	76,59076,590	$37M	0.27%	—
63	DF DENT & CO INC	74,81074,810	$36M	0.27%	ADD 37%
64	VOLORIDGE INVESTMENT MANAGEMENT, LLC	74,73074,730	$36M	0.27%	TRIM -46%
65	FULLER & THALER ASSET MANAGEMENT, INC.	73,65573,655	$35M	0.26%	TRIM -52%
66	Man Group plc	68,27268,272	$33M	0.24%	TRIM -14%
67	IEQ CAPITAL, LLC	66,04466,044	$32M	0.24%	TRIM -31%
68	FIRST TRUST ADVISORS LP	64,67764,677	$31M	0.23%	TRIM -4%
69	RHUMBLINE ADVISERS	63,64063,640	$31M	0.23%	ADD 3%
70	Retirement Systems of Alabama	63,35163,351	$30M	0.23%	—
71	Russell Investments Group, Ltd.	62,75062,750	$30M	0.22%	ADD 5%
72	BARCLAYS PLC	62,70762,707	$30M	0.22%	ADD 109%
73	Fundsmith LLPtracked	62,66862,668	$30M	0.22%	TRIM -24%
74	Amundi	61,13961,139	$29M	0.22%	ADD 1488%
75	CONGRESS ASSET MANAGEMENT CO	60,18760,187	$29M	0.22%	—
76	PANAGORA ASSET MANAGEMENT INC	60,02860,028	$29M	0.22%	ADD 10%
77	Squarepoint Ops LLC	58,87558,875	$28M	0.21%	ADD 76%
78	Spyglass Capital Management LLC	55,75555,755	$27M	0.20%	TRIM -19%
79	SEI INVESTMENTS CO	55,42155,421	$27M	0.20%	TRIM -38%
80	CANADA PENSION PLAN INVESTMENT BOARD	54,59454,594	$26M	0.20%	ADD 158%
81	RICE HALL JAMES & ASSOCIATES, LLC	53,98353,983	$26M	0.19%	TRIM -14%
82	California Public Employees Retirement System	52,36352,363	$25M	0.19%	ADD 9%
83	BI Asset Management Fondsmaeglerselskab A/S	51,59851,598	$25M	0.18%	ADD 247%
84	VICTORY CAPITAL MANAGEMENT INC	50,95150,951	$24M	0.18%	ADD 2%
85	PRINCIPAL FINANCIAL GROUP INC	50,44250,442	$24M	0.18%	ADD 6%
86	Heron Bay Capital Management	50,29350,293	$24M	0.18%	ADD 159%
87	NewEdge Wealth, LLC	49,77749,777	$24M	0.18%	ADD 1045%
88	Ranger Investment Management, L.P.	48,35748,357	$23M	0.17%	—
89	WELLINGTON MANAGEMENT GROUP LLP	48,22248,222	$23M	0.17%	—
90	WELLS FARGO & COMPANY/MN	48,05648,056	$23M	0.17%	ADD 7%
91	LPL Financial LLC	45,83045,830	$22M	0.16%	ADD 24%
92	LOS ANGELES CAPITAL MANAGEMENT LLC	45,68645,686	$22M	0.16%	TRIM -49%
93	CAPTRUST FINANCIAL ADVISORS	44,56544,565	$21M	0.16%	—
94	Swiss National Bank	44,48044,480	$21M	0.16%	—
95	Aberdeen Group plc	42,74842,748	$21M	0.15%	—
96	Balyasny Asset Management L.P.	42,29342,293	$20M	0.15%	NEW
97	Bridgewater Associates, LP	41,13541,135	$20M	0.15%	ADD 20%
98	Legal & General Group Plc	40,57940,579	$19M	0.15%	TRIM -8%
99	Crow's Nest Holdings LP	40,00040,000	$19M	0.14%	NEW
100	Mariner, LLC	39,97739,977	$19M	0.14%	ADD 6%

† 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.

2.7M

2.5M

2.4M

2.5M

$1.2B

AQR CAPITAL MANAGEMENT LLC

480K

540K

621K

1.0M

1.3M

1.4M

$634M

VANGUARD PORTFOLIO MANAGEMENT LLC

—

1.1M

$539M

VANGUARD CAPITAL MANAGEMENT LLC

—

1.0M

$486M

WASATCH ADVISORS LP

937K

829K

946K

926K

648K

774K

$372M

GEODE CAPITAL MANAGEMENT, LLC

656K

668K

638K

643K

667K

745K

$358M

STATE STREET CORP

780K

783K

707K

673K

665K

682K

$328M

Invesco Ltd.

1.1M

1.2M

452K

537K

483K

578K

$277M

RENAISSANCE TECHNOLOGIES LLC

554K

578K

678K

494K

466K

505K

$242M

BAILLIE GIFFORD & CO

14K

522K

585K

547K

503K

$242M

Mawer Investment Management Ltd.

—

696K

817K

647K

407K

446K

$214M

D. E. Shaw & Co., Inc.

178K

214K

344K

600K

528K

433K

$208M

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

102K

82K

103K

314K

375K

396K

$190M

DIMENSIONAL FUND ADVISORS LP

268K

332K

414K

388K

359K

348K

$167M

UBS Group AG

160K

186K

274K

248K

329K

340K

$163M

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	725	24,038,818	86.1%	$11.5B
2025-Q4	782	23,839,680	85.4%	$13.4B
2025-Q3	673	24,156,098	86.5%	$12.4B
2025-Q2	602	26,490,532	94.9%	$8.3B
2025-Q1	585	25,525,754	91.5%	$7.8B

Short interest has its own tab now — open SI →

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

Activists — 13D, active intent

Troendle August J.20%▲ +0.5ppSCHEDULE 13D/A · Amd 23 · event 2025-11-26SEC →

5,682,934 shares · 2 reporting persons

Large holders — 13G, passive (top 1 by % of class)

Holder

% of class

Type

As of

VANGUARD GROUP INC

QII

2026-03-13

SEC →

MEDP US Equity☆

Institutional ownership· 13F filers holding MEDP · 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 · MEDP

Institutional ownership· 13F filers holding MEDP · 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 · MEDP

MEDP US Equity