Vault-13

RAPID MICRO BIOSYSTEMS INC RPID

CLASS A COM · Common Stock · CUSIP 75340L104

27 institutional holders +3 vs Q3 2023
20,854,42320.9m shares reported held*
$15.4mreported value*
5 new 7 added 4 reduced 2 sold out net sold ≈ $446.1k (-602.8k 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 ≈ $0.74.

Trends to Q4 2023

Institutional holders

Managers reporting a position, each quarter

0204060Q3 22: 54Q4 22: 43Q1 23: 32Q2 23: 25Q3 23: 24Q4 23: 2727Q3 22Q4 22Q1 23Q2 23Q3 23Q4 23
Numbers
QuarterHolders
Q3 202254
Q4 202243
Q1 202332
Q2 202325
Q3 202324
Q4 202327

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 23
Numbers
QuarterBought or addedCut or sold out
Q4 20221628
Q1 2023724
Q2 2023615
Q3 2023510
Q4 2023126

Biggest buyers

JPMORGAN CHASE & CO Added +68,396+68.4k
RENAISSANCE TECHNOLOGIES LLC Added +55,500+55.5k
Virtu Financial LLC New +16,064+16.1k
MORGAN STANLEY Added +10,644+10.6k
XTX Topco Ltd New +10,463+10.5k
CITADEL ADVISORS LLC Added +7,494+7.5k
Tower Research Capital LLC (TRC) Added +6,655+6.7k
VANGUARD GROUP INC Added +2,350+2.4k
ROYAL BANK OF CANADA New +250+250
Advisory Services Network, LLC New +100+100

Biggest sellers

GOLDMAN SACHS GROUP INC Reduced -729,494-729.5k
Parkwood LLC Sold out -24,511-24.5k
Schonfeld Strategic Advisors LLC Sold out -15,000-15.0k
MILLENNIUM MANAGEMENT LLC Reduced -7,810-7.8k
NORTHERN TRUST CORP Reduced -3,294-3.3k
BlackRock Inc. Reduced -661-661

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 Q4 2023

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
202Q1 22: 1 buyingQ1 22: 0 sellingQ2 22: 1 buyingQ2 22: 0 sellingQ2 22Q3 22: 0 buyingQ3 22: 0 sellingQ4 22: 0 buyingQ4 22: 0 sellingQ4 22Q1 23: 0 buyingQ1 23: 0 sellingQ2 23: 1 buyingQ2 23: 0 sellingQ2 23Q3 23: 2 buyingQ3 23: 0 sellingQ4 23: 0 buyingQ4 23: 0 sellingQ4 23
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q1 20221$69.5k0——
Q2 20221$38.0k0——
Q3 20220—0——
Q4 20220—0——
Q1 20230—0——
Q2 20231$18.2k0——
Q3 20232$60.6k0——
Q4 20230—0——

None reported in Q4 2023.

Holders, Q4 2023

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Bain Capital Life Sciences Investors, LLC 0.60% of their portfolio Boston, MA 8,434,5608.4m $6.2m $6.2m 0.60% Unchanged
2 KENNEDY LEWIS MANAGEMENT LP 20.25% of their portfolio NEW YORK, NY 4,939,9314.9m $3.7m $3.7m 20.25% Unchanged
3 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 1,502,6241.5m $1.1m $1.1m 0.00% Added +68.4k +68,396
4 GLENVIEW CAPITAL MANAGEMENT, LLC 0.02% of their portfolio NEW YORK, NY 1,318,2881.3m $975.5k $975.5k 0.02% Unchanged
5 ABG-WTT Global Life Science Capital Partners GP Ltd 1.50% of their portfolio CENTRAL, HONG KONG, K3 1,038,2961.0m $768.3k $768.3k 1.50% Unchanged
6 BlackRock Inc. 0.00% of their portfolio New York, NY 1,021,4571.0m $755.9k $755.9k 0.00% Reduced -661 -661
7 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 728,374728.4k $539.0k $539.0k 0.00% Added +2.4k +2,350
8 ADAGE CAPITAL PARTNERS GP, L.L.C. 0.00% of their portfolio Boston, MA 700,000700.0k $518.0k $518.0k 0.00% Unchanged
9 Advent International, L.P. 0.01% of their portfolio BOSTON, MA 577,777577.8k $427.6k $427.6k 0.01% Unchanged
10 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 218,287218.3k $161.5k $161.5k 0.00% Reduced -729.5k -729,494
11 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 155,264155.3k $114.9k $114.9k 0.00% Unchanged
12 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 77,88777.9k $58.0k $58.0k 0.00% Added +55.5k +55,500
13 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 26,07426.1k $19.3k $19.3k 0.00% Unchanged
14 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 24,13524.1k $17.9k $17.9k 0.00% Added +7.5k +7,494
15 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 21,28821.3k $15.8k $15.8k 0.00% Added +10.6k +10,644
16 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 17,17517.2k $12.7k $12.7k 0.00% Reduced -7.8k -7,810
17 Virtu Financial LLC 0.00% of their portfolio New York, NY 16,06416.1k $12.0k $12.0k 0.00% New
18 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 15,65015.7k $11.6k $11.6k 0.00% Reduced -3.3k -3,294
19 XTX Topco Ltd 0.00% of their portfolio LONDON, X0 10,46310.5k $7.7k $7.7k 0.00% New
20 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 9,8079.8k $7.3k $7.3k 0.00% Added +6.7k +6,655
21 RESOURCES MANAGEMENT CORP /CT/ /ADV 0.00% of their portfolio WEST HARTFORD, CT 500500 $0 $0 0.00% Unchanged
22 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 250250 $0 $0 0.00% New
23 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 154154 $114 $114 0.00% Added +8 +8
24 Advisory Services Network, LLC 0.00% of their portfolio ATLANTA, GA 100100 $74 $74 0.00% New
25 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 1414 $10 $10 0.00% New
26 Qube Research & Technologies Ltd 0.00% of their portfolio LONDON, X0 44 $3 $3 0.00% Unchanged
27 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged