Vault-13

RAPID MICRO BIOSYSTEMS INC RPID

CLASS A COM · Common Stock · CUSIP 75340L104

20 institutional holders -2 vs Q2 2024
17,880,70417.9m shares reported held*
$15.9mreported value*
2 new 2 added 6 reduced 4 sold out net sold ≈ $1.0m (-1.1m 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 ≈ $0.89.

Trends to Q3 2024

Institutional holders

Managers reporting a position, each quarter

0204060Q3 22: 54Q4 22: 43Q1 23: 32Q2 23: 25Q3 23: 24Q4 23: 27Q1 24: 24Q2 24: 22Q3 24: 2020Q3 22Q1 23Q3 23Q1 24Q3 24
Numbers
QuarterHolders
Q3 202254
Q4 202243
Q1 202332
Q2 202325
Q3 202324
Q4 202327
Q1 202424
Q2 202422
Q3 202420

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 outQ1 23: 7 bought or addedQ1 23: 24 cut or sold outQ1 23Q2 23: 6 bought or addedQ2 23: 15 cut or sold outQ3 23: 5 bought or addedQ3 23: 10 cut or sold outQ3 23Q4 23: 12 bought or addedQ4 23: 6 cut or sold outQ1 24: 7 bought or addedQ1 24: 11 cut or sold outQ1 24Q2 24: 6 bought or addedQ2 24: 10 cut or sold outQ3 24: 4 bought or addedQ3 24: 10 cut or sold outQ3 24
Numbers
QuarterBought or addedCut or sold out
Q4 20221628
Q1 2023724
Q2 2023615
Q3 2023510
Q4 2023126
Q1 2024711
Q2 2024610
Q3 2024410

Biggest buyers

Mariner, LLC New +42,000+42.0k
RENAISSANCE TECHNOLOGIES LLC Added +16,158+16.2k
XTX Topco Ltd New +14,545+14.5k
BANK OF AMERICA CORP /DE/ Added +1,516+1.5k

Biggest sellers

GLENVIEW CAPITAL MANAGEMENT, LLC Reduced -652,798-652.8k
JPMORGAN CHASE & CO Reduced -505,196-505.2k
GEODE CAPITAL MANAGEMENT, LLC Reduced -19,914-19.9k
TWO SIGMA SECURITIES, LLC Sold out -10,974-11.0k
MILLENNIUM MANAGEMENT LLC Reduced -6,805-6.8k
Tower Research Capital LLC (TRC) Reduced -3,689-3.7k
VANGUARD GROUP INC Reduced -1,924-1.9k
ROYAL BANK OF CANADA Sold out -442-442
UBS Group AG Sold out -98-98
Qube Research & Technologies Ltd Sold out -4-4

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 Q3 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
404Q4 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 24Q2 24: 0 buyingQ2 24: 0 sellingQ3 24: 4 buyingQ3 24: 0 sellingQ3 24
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20220—0——
Q1 20230—0——
Q2 20231$18.2k0——
Q3 20232$60.6k0——
Q4 20230—0——
Q1 20240—0——
Q2 20240—0——
Q3 20244$141.8k0——
DateInsiderTradeSharesPrice ValueTheir holding
2024-08-08 Malloy Kirk Director Bought 50,000 $0.91 $45.5k50.0k shares +350%
2024-08-07 WIRTJES SEAN M CHIEF FINANCIAL OFFICER Bought 10,000 $0.78 $7.8k10.0k shares +3%
2024-08-06 Kollender Richard S Director Bought 65,000 $0.77 $50.0k65.0k shares +205%
2024-08-06 Spignesi Robert G. Jr. PRESIDENT AND CEO, director Bought 50,000 $0.77 $38.5k50.0k shares +10%

Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).

Holders, Q3 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Bain Capital Life Sciences Investors, LLC 0.78% of their portfolio Boston, MA 8,434,5608.4m $7.5m $7.5m 0.78% Unchanged
2 KENNEDY LEWIS MANAGEMENT LP 20.10% of their portfolio NEW YORK, NY 4,939,9314.9m $4.4m $4.4m 20.10% Unchanged
3 ABG-WTT Global Life Science Capital Partners GP Ltd 4.59% of their portfolio CENTRAL, HONG KONG, K3 1,038,2961.0m $924.1k $924.1k 4.59% Unchanged
4 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 726,560726.6k $646.6k $646.6k 0.00% Reduced -1.9k -1,924
5 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 642,660642.7k $572.0k $572.0k 0.00% Reduced -505.2k -505,196
6 Advent International, L.P. 0.01% of their portfolio BOSTON, MA 577,777577.8k $514.2k $514.2k 0.01% Unchanged
7 BlackRock, Inc. 0.00% of their portfolio New York, NY 572,879572.9k $509.9k $509.9k 0.00% First filing
8 GLENVIEW CAPITAL MANAGEMENT, LLC 0.01% of their portfolio NEW YORK, NY 547,990548.0k $487.7k $487.7k 0.01% Reduced -652.8k -652,798
9 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 150,658150.7k $134.1k $134.1k 0.00% Reduced -19.9k -19,914
10 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 82,14582.1k $73.1k $73.1k 0.00% Added +16.2k +16,158
11 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 52,18452.2k $46.4k $46.4k 0.00% Reduced -6.8k -6,805
12 Mariner, LLC 0.00% of their portfolio Overland Park, KS 42,00042.0k $37.4k $37.4k 0.00% New
13 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 26,07426.1k $23.2k $23.2k 0.00% Unchanged
14 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 15,55015.6k $13.8k $13.8k 0.00% Unchanged
15 XTX Topco Ltd 0.00% of their portfolio LONDON, X0 14,54514.5k $12.9k $12.9k 0.00% New
16 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 10,10810.1k $9.0k $9.0k 0.00% Unchanged
17 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 4,6074.6k $4.1k $4.1k 0.00% Reduced -3.7k -3,689
18 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 1,6801.7k $1.5k $1.5k 0.00% Added +1.5k +1,516
19 RESOURCES MANAGEMENT CORP /CT/ /ADV 0.00% of their portfolio WEST HARTFORD, CT 500500 $0 $0 0.00% Unchanged
20 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged