2026 Q2 Portfolio Activity
In 2026 Q2, ARCH Venture Management, LLC maintained a portfolio of 13 distinct positions. The most significant new addition was BOUNDLESS BIO INC, now representing 0.61% of the total fund value. They heavily accumulated shares in PARABILIS MEDICINES INC, increasing the position by 229.8%.
Position History
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Total Positions
13
Quarter
2026 Q2
Top Holding
N/A (16.0%)
Top 10 Concentration
99.3%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-13 of 13
ARCH Venture Management, LLC Full Holdings List — 2026 Q2
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
N/A
PARABILIS MEDIC...
|
|
Unknown | 15.95% | — |
#1
Prev: #—
|
9.5 |
—
|
6,412,780 | — |
NEW
|
6,412,780 | $175,517,789 | — | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
BEAM
BEAM THERAPEUTI...
|
Healthcare | 14.16% | 15.98% |
#2
3
Prev: #5
|
6.5 |
—
|
no change | no change |
P
S
|
4,540,132 | $155,771,929 | 2024 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
RAPP
RAPPORT THERAPE...
|
Healthcare | 14.12% | 17.23% |
#3
1
Prev: #2
|
6.0 |
—
|
no change | no change |
P
S
|
3,728,738 | $155,376,512 | 2024 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
N/A
SEAPORT THERAPE...
|
|
Unknown | 12.42% | — |
#4
Prev: #—
|
8.0 |
—
|
6,294,951 | — |
NEW
|
6,294,951 | $136,600,437 | — | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
ERAS
ERASCA INC
|
Healthcare | 11.81% | 16.95% |
#5
1
Prev: #4
|
5.5 |
—
|
no change | no change |
P
S
|
7,091,557 | $129,917,324 | 2021 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
VIR
VIR BIOTECHNOLO...
|
Healthcare | 11.76% | 17.09% |
#6
3
Prev: #3
|
4.5 |
—
|
-222,500 | -1.7% |
P
S
|
12,694,163 | $129,353,521 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
MAZE
MAZE THERAPEUTI...
|
Healthcare | 11.18% | 18.16% |
#7
6
Prev: #1
|
5.0 |
—
|
no change | no change |
P
S
|
4,120,053 | $122,983,582 | 2025 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
LYEL
LYELL IMMUNOPHA...
|
Healthcare | 4.14% | 9.62% |
#8
2
Prev: #6
|
2.7 |
—
|
no change | no change |
P
S
|
3,247,162 | $45,525,211 | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
N/A
GENERATE BIOMED...
|
|
Unknown | 2.98% | 3.59% |
#9
2
Prev: #7
|
2.2 |
—
|
no change | no change |
P
S
|
1,944,426 | $32,802,467 | — | 13F Filing | 2026-06-30 | 2026-08-14 | ||
|
TXG
10X GENOMICS IN...
|
Healthcare | 0.76% | 0.68% |
#10
2
Prev: #8
|
1.3 |
—
|
no change | no change |
P
S
|
217,834 | $8,351,756 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
BOLD
BOUNDLESS BIO I...
|
Healthcare | 0.61% | — |
#11
Prev: #—
|
3.7 |
—
|
2,694,095 | — |
NEW
|
2,694,095 | $6,735,238 | 2026 Q2 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
GOSS
GOSSAMER BIO IN...
|
Healthcare | 0.12% | 0.39% |
#12
3
Prev: #9
|
1.0 |
—
|
no change | no change |
P
S
|
8,055,916 | $1,326,004 | 2023 Q3 | 13F Filing | 2026-06-30 | 2026-08-14 | |||
|
QTTB
Q32 BIO INC
|
Healthcare | 0.00% | 0.30% |
Sold All 😨
(Was: #10) |
0.0 |
—
|
-320,482 | -100.0% |
CLOSED
|
— | $— | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-08-14 |
Showing 1-13 of 13 holdings