Vault-13

RAPID MICRO BIOSYSTEMS INC RPID

CLASS A COM · Common Stock · CUSIP 75340L104

24 institutional holders -3 vs Q4 2023
19,695,61719.7m shares reported held*
$18.9mreported value*
1 new 6 added 7 reduced 4 sold out net sold ≈ $1.1m (-1.2m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $0.96.

Trends to Q1 2024

Institutional holders

Managers reporting a position, each quarter

0204060Q3 22: 54Q4 22: 43Q1 23: 32Q2 23: 25Q3 23: 24Q4 23: 27Q1 24: 2424Q3 22Q1 23Q3 23Q1 24
Numbers
QuarterHolders
Q3 202254
Q4 202243
Q1 202332
Q2 202325
Q3 202324
Q4 202327
Q1 202424

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
40040Q4 22: 16 bought or addedQ4 22: 28 cut or sold outQ4 22Q1 23: 7 bought or addedQ1 23: 24 cut or sold outQ1 23Q2 23: 6 bought or addedQ2 23: 15 cut or sold outQ2 23Q3 23: 5 bought or addedQ3 23: 10 cut or sold outQ3 23Q4 23: 12 bought or addedQ4 23: 6 cut or sold outQ4 23Q1 24: 7 bought or addedQ1 24: 11 cut or sold outQ1 24
Numbers
QuarterBought or addedCut or sold out
Q4 20221628
Q1 2023724
Q2 2023615
Q3 2023510
Q4 2023126
Q1 2024711

Biggest buyers

MILLENNIUM MANAGEMENT LLC Added +49,012+49.0k
MORGAN STANLEY Added +9,036+9.0k
GEODE CAPITAL MANAGEMENT, LLC Added +5,889+5.9k
UBS Group AG New +246+246
VANGUARD GROUP INC Added +110+110
BANK OF AMERICA CORP /DE/ Added +69+69
WELLS FARGO & COMPANY/MN Added +3+3

Biggest sellers

ADAGE CAPITAL PARTNERS GP, L.L.C. Sold out -700,000-700.0k
JPMORGAN CHASE & CO Reduced -256,962-257.0k
GOLDMAN SACHS GROUP INC Reduced -199,648-199.6k
CITADEL ADVISORS LLC Sold out -24,135-24.1k
RENAISSANCE TECHNOLOGIES LLC Reduced -20,500-20.5k
XTX Topco Ltd Sold out -10,463-10.5k
Virtu Financial LLC Reduced -5,184-5.2k
Tower Research Capital LLC (TRC) Reduced -4,260-4.3k
BlackRock Inc. Reduced -1,729-1.7k
ROYAL BANK OF CANADA Reduced -190-190

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Bain Capital Life Sciences Fund, L.P. 13G · exempt (held before listing) filed 2026-08-14 16.8% 7.7m≈ $13.2m 2026-08-14
Longitude Capital Partners II, LLC 13G · exempt (held before listing) filed 2026-05-15 8.6% 3.5m≈ $6.1m 2026-05-15
ARMISTICE CAPITAL, LLC 13G · institution new · filed 2026-08-14 7.3% new 3.3m≈ $5.8m 2026-08-14
Spignesi Robert G. Jr. 13D · may seek influence new · filed 2025-08-19
Stated purposeThe information set forth or incorporated by reference in Items 3 and 6 of this Statement is incorporated by reference into this Item 4. The Reporting Person intends to continuously review his investment in the Issuer and may in the future determine (1) to acquire additional securities of the Issuer, through open market purchases, private agreements or otherwise, (2) to dispose of all or a portion of the securities of the Issuer owned by him or (3) to take any other available course of action. Notwithstanding anything contained herein, the Reporting Person specifically reserves the right to change his intention with respect to any or all of such matters. In reaching any decision as to his course of action (as well as to the specific elements thereof), the Reporting Person currently expect… Full filing
 6.3% new 2.6m≈ $4.6m 2025-08-19
Endeavour Medtech Growth II LP 13G · passive investor filed 2026-02-13 5.7% 2.3m≈ $3.9m 2026-02-13

Insider purchases and sales in Q1 2024

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
202Q2 22: 1 buyingQ2 22: 0 sellingQ3 22: 0 buyingQ3 22: 0 sellingQ3 22Q4 22: 0 buyingQ4 22: 0 sellingQ1 23: 0 buyingQ1 23: 0 sellingQ1 23Q2 23: 1 buyingQ2 23: 0 sellingQ3 23: 2 buyingQ3 23: 0 sellingQ3 23Q4 23: 0 buyingQ4 23: 0 sellingQ1 24: 0 buyingQ1 24: 0 sellingQ1 24
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q2 20221$38.0k0——
Q3 20220—0——
Q4 20220—0——
Q1 20230—0——
Q2 20231$18.2k0——
Q3 20232$60.6k0——
Q4 20230—0——
Q1 20240—0——

None reported in Q1 2024.

Holders, Q1 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Bain Capital Life Sciences Investors, LLC 0.66% of their portfolio Boston, MA 8,434,5608.4m $8.2m $8.2m 0.66% Unchanged
2 KENNEDY LEWIS MANAGEMENT LP 20.73% of their portfolio NEW YORK, NY 4,939,9314.9m $4.8m $4.8m 20.73% Unchanged
3 GLENVIEW CAPITAL MANAGEMENT, LLC 0.02% of their portfolio NEW YORK, NY 1,318,2881.3m $1.3m $1.3m 0.02% Unchanged
4 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 1,245,6621.2m $1.2m $1.2m 0.00% Reduced -257.0k -256,962
5 ABG-WTT Global Life Science Capital Partners GP Ltd 1.85% of their portfolio CENTRAL, HONG KONG, K3 1,038,2961.0m $768.3k $768.3k 1.85% Unchanged
6 BlackRock Inc. 0.00% of their portfolio New York, NY 1,019,7281.0m $989.1k $989.1k 0.00% Reduced -1.7k -1,729
7 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 728,484728.5k $706.6k $706.6k 0.00% Added +110 +110
8 Advent International, L.P. 0.01% of their portfolio BOSTON, MA 577,777577.8k $560.4k $560.4k 0.01% Unchanged
9 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 161,153161.2k $156.4k $156.4k 0.00% Added +5.9k +5,889
10 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 66,18766.2k $64.2k $64.2k 0.00% Added +49.0k +49,012
11 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 57,38757.4k $56.0k $56.0k 0.00% Reduced -20.5k -20,500
12 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 30,32430.3k $29.4k $29.4k 0.00% Added +9.0k +9,036
13 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 26,07426.1k $25.3k $25.3k 0.00% Unchanged
14 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 18,63918.6k $18.1k $18.1k 0.00% Reduced -199.6k -199,648
15 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 15,65015.7k $15.2k $15.2k 0.00% Unchanged
16 Virtu Financial LLC 0.00% of their portfolio New York, NY 10,88010.9k $11.0k $11.0k 0.00% Reduced -5.2k -5,184
17 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 5,5475.5k $5.4k $5.4k 0.00% Reduced -4.3k -4,260
18 RESOURCES MANAGEMENT CORP /CT/ /ADV 0.00% of their portfolio WEST HARTFORD, CT 500500 $0 $0 0.00% Unchanged
19 UBS Group AG 0.00% of their portfolio ZURICH, V8 246246 $239 $239 0.00% New
20 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 157157 $152 $152 0.00% Added +3 +3
21 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 8383 $81 $81 0.00% Added +69 +69
22 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 6060 $0 $0 0.00% Reduced -190 -190
23 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 44 $4 $4 0.00% Unchanged
24 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged