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PRLB

Proto Labs, Inc.
IndustrialsIndustrial Machinery & Supplies & ComponentsLatest close $728 of 27 marquee funds currently hold1 CUSIP mapped
Current holders
8
27 funds tracked
Ever held
9
Current + past
New this quarter
2
Exited this quarter
0

Marquee-fund ownership over time

Nov 14, 2017Feb 16, 2021Aug 14, 2024May 15, 2026
Now
8

This quarter's activity

New positions opened

Positions exited

None.

Current holders

Sorted by tenure (longest first)
FundEntry priceLatest closeReturn on entry
Renaissance Technologies$28$72+155%
Citadel Advisors$29$72+147%
Two Sigma Investments re-entered$29$72+147%
D.E. Shaw$29$72+147%
AQR Capital Management$29$72+147%
Millennium Management re-entered$29$72+147%
Point72 Asset Management$67$72+8%
Bridgewater Associates$72$72+0%

“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.

Past holders

Funds that exited at some point
FundEntry → ExitReturn
Maverick Capital 4× in & out→ $55-25%

Insider activity

Form 4 — officers, directors, 10%+ owners

Filed within two business days of each transaction by anyone with material insider status at Proto Labs Inc. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.

Filings · last 30d
12
Filings · last 90d
12
Total on file
457
Recent SEC buffer
Most recent
Jun 4, 2026

30d / 90d windows measured from Jun 4, 2026 — the most recent Form 4 on file — not from today.

Showing 15 of 457 recent Form 4 filings. Browse all on EDGAR ↗

Fundamentals

XBRL · Proto Labs, Inc.

Annual figures sourced directly from Proto Labs, Inc.'s 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.

Revenue
$533.13M
FY2025+6% YoY
Net income
$21.24M
FY2025+28% YoY
EPS (diluted)
$0.8800
FY2025+33% YoY
Free cash flow(?)
$59.66M
FY2025-13% YoY

Recent SEC filings

10-K · 10-Q · 8-K · 13D/G · proxy

The most recent material filings for Proto Labs Inc — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.

Trade history

Every open→close lifecycle across tracked funds
FundOpen dateClose dateOpen priceClose price / currentReturn
Bridgewater AssociatesQ2 2026open$72$77+8%
Two Sigma InvestmentsQ2 2026open$72$72+0%
Point72 Asset ManagementQ1 2026open$67$72+8%
Millennium ManagementQ3 2025open$48$72+51%
Citadel AdvisorsQ3 2024open$29$72+147%
Two Sigma InvestmentsQ3 2024Q1 2026$29$67+128%
D.E. ShawQ3 2024open$29$72+147%
AQR Capital ManagementQ3 2024open$29$72+147%
Millennium ManagementQ3 2024Q2 2025$29$41+39%
Renaissance TechnologiesQ3 2024open$28$72+155%
Maverick CapitalQ3 2021Q1 2022$74$55-25%
Maverick CapitalQ1 2021Q2 2021$180$94-48%
Maverick CapitalQ4 2019Q1 2020$98$100+3%
Maverick CapitalQ4 2017Q3 2018$84$135+60%
Caveats
  • Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
  • Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
  • “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
  • Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
  • Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.