Atlas Venture Fund X, L.P.

4 filings 3 distinct issuers Active 2020-07-07 → 2026-05-28

Track Record

Total filings

1 SCHEDULE 13D/A · 3 SC

Distinct issuers

75% issuer diversity

Median stake

3.6%

864,261 avg shares

AI briefs cached

0/4

intent-classified filings

Backtested Performance · post-filing returns (split + dividend adjusted)

Median 30d

0.0%

across 1 filings · win rate 0%

Median 60d

+11.7%

across 1 filings · win rate 100%

Median 90d

—

across 0 filings · win rate —

Median 1y

—

across 0 filings · win rate —

Anchor: closest trading day on/after filing's date_of_event. Source: Yahoo Finance daily adj_close. Past performance is not indicative of future results.

Filings · 4 total

Filed	Form	Issuer	Stake	Shares
2026-05-28	SCHEDULE 13D/A	Q32 Bio Inc.QTTB	3.60%	864,261	view →
2022-12-06	SC	Replimune Group, Inc.REPL	—	—	view →
2021-02-16	SC	Spero Therapeutics, Inc.SPRO	—	—	view →
2020-07-07	SC	Replimune Group, Inc.REPL	—	—	view →

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