Granahan Investment Management, LLC
CIK 1026710 · EDGAR ↗
- sum of disclosed values for 2026-03-31; 0 positions have no disclosed value and are left out of the sum, counted here rather than dropped
- $2.1B
- every reported holding for this filer and quarter, including ones with no disclosed value
- 149
- positions with no comparable holding in the prior quarter (kind new), 2026-03-31
- 17
- positions absent from this quarter's filing after being held last quarter (kind exit), 2026-03-31 — inferred from absence, not a sale record
- 25
Quarter-end snapshot, filed up to 45 days later — not current holdings. What a 13F covers ↓
Changes · Quarter ended 2026-03-31. Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.
by shares · How classified ↗Period
| The reviewed ticker for the filed issuer name and share class, the same mapping the Reported positions table uses. Symbols are never inferred from names; — means no reviewed mapping. | position matched across quarters by exact reported CUSIP over a registry gap — never a name match | NEW / ADD / TRIM / EXIT by share count · NO CHANGE = same shares; the value moved with price, so never an ADD or a TRIM · EXIT = absent this quarter (disposed, delisted, confidential, or reported by an affiliate) — the filing does not say which · NO PRIOR = no comparable prior quarter on record (a first filing, or a quarter filed inside an affiliate's report), so not called a new stake · n/c = not classifiable: value undisclosed on one side of the pair, or neither shares nor value can classify it · †v: the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE | derived by Public Filings from the published data; “no value” means the source did not disclose a usable value — never zero | Prev value | Curr value | Prev shares | Curr shares | |
|---|---|---|---|---|---|---|---|---|
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:15744 · issuer key iss:402 | TRIM | +$10.3M | −27,706 | $84.1M | $94.4M | 267,175 | 239,469 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:10440 · issuer key iss:1469 | ADD | −$14.9M | +1,084,559 | $106M | $90.9M | 11,590,428 | 12,674,987 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: SHS · position key pos:15350 · issuer key iss:2111 | TRIM | +$15.0M | −7,048 | $68.4M | $83.4M | 347,365 | 340,317 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:10427 · issuer key iss:1241 | ADD | +$38.2M | +51,112 | $43.6M | $81.8M | 326,474 | 377,586 |
| — | share class as filed: COM CL A · position key sid:sec:prov:92d70af3046ad7c1844307f216b087fc · issuer key cusip6:92645B | ADD | +$3.4M | +12,113 | $67.8M | $71.2M | 1,075,202 | 1,087,315 |
| — | share class as filed: CLASS A COM · position key sid:sec:prov:67cb39f1f4d3ca2002824d670ecf64a9 · issuer key cusip6:45569U | ADD | +$4.5M | +3,067,255 | $60.8M | $65.3M | 17,216,584 | 20,283,839 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM SHS CL A · position key pos:16477 · issuer key iss:760 | NEW | +$60.6M | +2,071,084 | $0 | $60.6M | — | 2,071,084 |
| — | share class as filed: ORD · position key sid:sec:prov:9a25a5595fcff209a416795ab09ab7c6 · issuer key cusip6:G5S37H | TRIM | +$1.7M | −153,243 | $52.8M | $54.6M | 1,376,993 | 1,223,750 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: CLASS A COM · position key pos:10925 · issuer key iss:1309 | ADD | +$17.7M | +39,724 | $33.5M | $51.2M | 384,710 | 424,434 |
| — | share class as filed: CL A COM · position key sid:sec:prov:800c7129911e0a5cb2a7b246edb55bfd · issuer key cusip6:501270 | TRIM | +$1.2M | −179,191 | $41.2M | $42.4M | 787,108 | 607,917 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:17216 · issuer key iss:1366 | ADD | +$9.7M | +2,052 | $31.0M | $40.7M | 196,642 | 198,694 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:12735 · issuer key iss:209 | ADD | −$4.5M | +14,978 | $43.0M | $38.5M | 75,714 | 90,692 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:17974 · issuer key iss:488 | TRIM | +$11.6M | −8 | $24.3M | $35.9M | 26,035 | 26,027 |
| — | share class as filed: SHS · position key sid:sec:prov:17fe31dc9debe044bef98ab2b3fd7ead · issuer key cusip6:M6372Q | TRIM | −$3.3M | −271,192 | $37.0M | $33.7M | 2,569,663 | 2,298,471 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COMMON STOCK · position key pos:16668 · issuer key iss:1119 | TRIM | −$11.8M | −459,089 | $44.1M | $32.3M | 1,659,572 | 1,200,483 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:15471 · issuer key iss:1750 | ADD | +$14.8M | +80,059 | $17.1M | $31.9M | 247,375 | 327,434 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM CL A · position key pos:16486 · issuer key iss:762 | ADD | +$4.6M | +269,882 | $27.2M | $31.8M | 665,518 | 935,400 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:11225 · issuer key iss:1173 | TRIM | −$20.2M | −562,517 | $50.6M | $30.3M | 3,115,930 | 2,553,413 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM NEW · position key pos:13318 · issuer key iss:1660 | ADD | +$13.9M | +709,934 | $15.4M | $29.3M | 799,612 | 1,509,546 |
| a reviewed mapping row for this filed issuer name and share class (never inferred from the name) | share class as filed: COM · position key pos:11125 · issuer key iss:1642 | TRIM | −$2.3M | −47,585 | $30.8M | $28.5M | 418,227 | 370,642 |
Flags: no row carries a flag.
1–20 of the 100 changes on this page
1–100 of 173 changes
Mark-to-market only (no share change) · 1
Positions whose share count is identical in both quarters; the value changed with price, not with a decision.
| position matched across quarters by exact reported CUSIP over a registry gap — never a name match | NEW / ADD / TRIM / EXIT by share count · NO CHANGE = same shares; the value moved with price, so never an ADD or a TRIM · EXIT = absent this quarter (disposed, delisted, confidential, or reported by an affiliate) — the filing does not say which · NO PRIOR = no comparable prior quarter on record (a first filing, or a quarter filed inside an affiliate's report), so not called a new stake · n/c = not classifiable: value undisclosed on one side of the pair, or neither shares nor value can classify it · †v: the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE | derived by Public Filings from the published data; “no value” means the source did not disclose a usable value — never zero | Prev value | Curr value | Prev shares | Curr shares | |
|---|---|---|---|---|---|---|---|
share class as filed: COM NEW · position key sid:sec:prov:de293839da8f83a07149c9271d42a8b1 · issuer key cusip6:86887Q | NO CHANGE | +$27.4K | 0 | $203K | $231K | 21,549 | 21,549 |
Ticker: no position here maps to a reviewed ticker. Flags: no row carries a flag.
Holdings without a security ID are counted, not compared. Method ↗
Reported positions — 2026-03-31
149 positionsViewThis build carries one quarter for this manager: 2026-03-31. Notable managers carry four published quarters, others two.
| This list carries reported issuer names and security identities, without a dated ticker mapping. Symbols are not inferred from names. | a position composed from a base filing plus NEW-HOLDINGS amendments keeps every source row here; the composition's latest filed date is the one shown served from this build's published holdings (derived from the filer's own reported rows); every row resolves to its filing | Share of total reported value, calculated only when the full position list has disclosed values. This is 13F long value, not total assets. | value undisclosed on the filing: retained and counted, excluded from sums, never shown as $0 | Shares | Wt |
|---|---|---|---|---|---|
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | CARPENTER TECHNOLOGY CORP · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $94.4M | 239,469 | 4.6% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | PORCH GROUP INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $90.9M | 12,674,987 | 4.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | FTAI AVIATION LTD · SHS CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $83.4M | 340,317 | 4.0% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | MODINE MFG CO · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $81.8M | 377,586 | 4.0% | |
| — | VICTORY CAP HLDGS INC DEL · COM CL A CUSIP 92645B103 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $71.2M | 1,087,315 | 3.4% | |
| — | INDIE SEMICONDUCTOR INC · CLASS A COM CUSIP 45569U101 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $65.3M | 20,283,839 | 3.2% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | FORGENT POWER SOLUTIONS INC · COM SHS CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $60.6M | 2,071,084 | 2.9% | |
| — | MAREX GROUP PLC · ORD CUSIP G5S37H101 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $54.6M | 1,223,750 | 2.6% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | NEXTPOWER INC · CLASS A COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $51.2M | 424,434 | 2.5% | |
| — | KURA SUSHI USA INC · CL A COM CUSIP 501270102 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $42.4M | 607,917 | 2.1% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | ONTO INNOVATION INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $40.7M | 198,694 | 2.0% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | AXON ENTERPRISE INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $38.5M | 90,692 | 1.9% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | COMFORT SYS USA INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $35.9M | 26,027 | 1.7% | |
| — | KORNIT DIGITAL LTD · SHS CUSIP M6372Q113 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $33.7M | 2,298,471 | 1.6% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | LIFE TIME GROUP HOLDINGS INC · COMMON STOCK CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $32.3M | 1,200,483 | 1.6% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | TTM TECHNOLOGIES INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $31.9M | 327,434 | 1.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | FIGURE TECHNOLOGY SOLUTIO · COM CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $31.8M | 935,400 | 1.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | MAGNITE INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $30.3M | 2,553,413 | 1.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | QXO INC · COM NEW CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $29.3M | 1,509,546 | 1.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | SEMTECH CORP · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $28.5M | 370,642 | 1.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | CAVA GROUP INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $24.6M | 303,891 | 1.2% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | RAMBUS INC DEL · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $24.1M | 280,246 | 1.2% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | SPORTRADAR GROUP AG · CLASS A ORD SHS CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $24.1M | 1,439,659 | 1.2% | |
| — | CELLEBRITE DI LTD · ORDINARY SHARES CUSIP M2197Q107 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $24.0M | 1,739,644 | 1.2% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | GENIUS SPORTS LIMITED · SHARES CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $23.9M | 5,383,762 | 1.2% | |
| — | SI BONE INC · COM CUSIP 825704109 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $22.0M | 1,739,097 | 1.1% | |
| — | SILICON MOTION TECHNOLOGY CO · SPONSORED ADR CUSIP 82706C108 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $21.9M | 195,252 | 1.1% | |
| — | YORK SPACE SYSTEMS INC · COM CUSIP 987084100 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $21.5M | 967,610 | 1.0% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | RBC BEARINGS INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $20.9M | 38,493 | 1.0% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | MATERION CORP · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $20.9M | 144,476 | 1.0% | |
| — | DIGITAL TURBINE INC · COM NEW CUSIP 25400W102 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $20.5M | 7,112,351 | 1.0% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | CASELLA WASTE SYS INC · CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $19.9M | 250,262 | 1.0% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | GATES INDL CORP PLC · ORD SHS CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $17.5M | 774,604 | 0.8% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | GLOBAL E ONLINE LTD · SHS CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $16.9M | 546,969 | 0.8% | |
| — | ARLO TECHNOLOGIES INC · COM CUSIP 04206A101 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $16.6M | 1,169,490 | 0.8% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | ZETA GLOBAL HOLDINGS CORP · CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $16.3M | 1,024,487 | 0.8% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | TEXAS CAP BANCSHARES INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $16.3M | 171,367 | 0.8% | |
| — | AMERESCO INC · CL A CUSIP 02361E108 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $16.1M | 630,073 | 0.8% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | CENTRUS ENERGY CORP · CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $15.6M | 89,690 | 0.8% | |
| — | ORTHOPEDIATRICS CORP · COM CUSIP 68752L100 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $14.2M | 896,741 | 0.7% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | STERLING INFRASTRUCTURE INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $14.0M | 34,332 | 0.7% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | SHARKNINJA INC · COM SHS CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $14.0M | 131,738 | 0.7% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | COMPASS INC · CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $13.8M | 1,885,312 | 0.7% | |
| — | BIOLIFE SOLUTIONS INC · COM NEW CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $13.8M | 722,057 | 0.7% | |
| — | ALIGNMENT HEALTHCARE INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $13.8M | 780,500 | 0.7% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | UNUSUAL MACHS INC · COM SHS CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $12.6M | 1,016,454 | 0.6% | |
| — | ARTERIS INC · COM CUSIP 04302A104 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $11.7M | 713,077 | 0.6% | |
| — | FIRST WATCH RESTAURANT GROUP · COM CUSIP 33748L101 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $11.4M | 1,088,037 | 0.6% | |
| — | DAVE INC · CLASS A COM NEW CUSIP 23834J201 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $11.4M | 65,462 | 0.6% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | IRHYTHM HOLDINGS INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $11.3M | 96,022 | 0.5% | |
| — | STOKE THERAPEUTICS INC · COM CUSIP 86150R107 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $10.9M | 335,586 | 0.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | VIKING THERAPEUTICS INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $10.8M | 332,192 | 0.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | TOAST INC · CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $10.6M | 399,067 | 0.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | NLIGHT INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $10.6M | 185,271 | 0.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | REPLIGEN CORP · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $10.2M | 86,953 | 0.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | HEALTHEQUITY INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $10.2M | 122,099 | 0.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | CELCUITY INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $10.1M | 88,833 | 0.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | STEPSTONE GROUP INC · COM CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $10.1M | 211,626 | 0.5% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | KINIKSA PHARMACEUTICALS INTL · ORD SHS CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $10.1M | 209,256 | 0.5% | |
| — | UNIVERSAL TECHNICAL INST INC · COM CUSIP 913915104 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $8.8M | 242,393 | 0.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | CHIME FINL INC · COM SHS CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $8.4M | 446,152 | 0.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | PHREESIA INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $8.3M | 987,607 | 0.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | ENOVIX CORPORATION · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $8.2M | 1,589,586 | 0.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | JBT MAREL CORPORATION · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $8.1M | 63,212 | 0.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | SCHOLAR ROCK HLDG CORP · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $7.7M | 156,314 | 0.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | ARCHER AVIATION INC · COM CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $7.7M | 1,480,746 | 0.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | BRIDGEBIO PHARMA INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $7.6M | 102,911 | 0.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | LIGHTPATH TECHNOLOGIES INC · COM CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $7.6M | 753,621 | 0.4% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | AEROVIRONMENT INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $7.5M | 40,736 | 0.4% | |
| — | SYNDAX PHARMACEUTICALS INC · COM CUSIP 87164F105 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $7.2M | 306,321 | 0.3% | |
| — | MAYVILLE ENGR CO INC · COM CUSIP 578605107 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $7.0M | 387,470 | 0.3% | |
| — | CHEFS WHSE INC · COM CUSIP 163086101 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $6.8M | 114,599 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | ALLEGRO MICROSYSTEMS INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.8M | 215,001 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | RHYTHM PHARMACEUTICALS INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.8M | 77,709 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | IMMUNOME INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.7M | 307,021 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | MP MATERIALS CORP · COM CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.7M | 138,658 | 0.3% | |
| — | LINDBLAD EXPEDITIONS HLDGS I · COM CUSIP 535219109 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $6.7M | 385,383 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | VEECO INSTRS INC DEL · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.5M | 192,731 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | WILLSCOT HLDGS CORP · COM CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.5M | 375,784 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | COSTAR GROUP INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.5M | 161,047 | 0.3% | |
| — | ETHOS TECHNOLOGIES INC · CL A CUSIP 29765A101 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $6.5M | 580,595 | 0.3% | |
| — | BETA TECHNOLOGIES INC · COM SHS CL A CUSIP 086921103 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $6.3M | 431,958 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | EDGEWISE THERAPEUTICS INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.3M | 200,843 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | APOGEE THERAPEUTICS INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.3M | 75,086 | 0.3% | |
| — | ZYMEWORKS INC · COM CUSIP 98985Y108 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $6.3M | 250,773 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | GENEDX HOLDINGS CORP · COM CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.2M | 96,605 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | JFROG LTD · ORD SHS CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.1M | 130,103 | 0.3% | |
| — | OWLET INC · CL A NEW CUSIP 69120X206 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $6.1M | 1,186,655 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | XENON PHARMACEUTICALS INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.1M | 104,478 | 0.3% | |
| — | IMMUNOVANT INC · COM CUSIP 45258J102 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $6.1M | 244,430 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | COGENT COMM HOLDINGS INC · COM NEW CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $6.0M | 317,447 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | NUTANIX INC · CL A CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $5.9M | 156,318 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | CALLAWAY GOLF CO · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $5.9M | 422,920 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | LATTICE SEMICONDUCTOR CORP · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $5.8M | 63,054 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | RADNET INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $5.8M | 104,282 | 0.3% | |
| — | NPK INTERNATIONAL INC · COM SHS CUSIP 651718504 quarter ended 2026-03-31 filed filed 2026-05-15 +45d ticker not yet mapped | $5.8M | 401,658 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | KINSALE CAP GROUP INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $5.6M | 16,516 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | CECO ENVIRONMENTAL CORP · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $5.5M | 92,728 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | FABRINET · SHS CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $5.4M | 10,431 | 0.3% | |
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | XERIS BIOPHARMA HOLDINGS INC · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-15 +45d | $5.3M | 921,854 | 0.3% |
1–20 of the 100 positions on this page
1–100 of 149 positions · page 1 of 2
One line per issuer, largest first — open a line for its reported rows. Grouping ↗
Book shape
Tick = median of the 8,748 tracked filers with a 2026-03-31 book (the index median: the 8,662 with a complete book). Concentration uses reported 13F long value, not total assets; the index is withheld when any position lacks a value.- 55.6%below median 80.0%
- integer Herfindahl–Hirschman index in basis points over disclosed position values
- 176 bpsbelow median 446 bps
- holdings with no disclosed value (undisclosed, or unreadable on the filing) — kept and counted, never shown as zero
- 149 / 149median book 97.5 positions
174 quarter-over-quarter rows
Filing history
| Period | Source |
|---|---|
| 2026-03-31 | EDGAR ↗ |
Complete source filings on SEC EDGAR
The filing on EDGAR is the record, including any filed after this build.
Open Granahan Investment Management, LLC's 13F filings on SEC EDGAR ↗A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗
13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.
Positions are quarter-end snapshots filed up to 45 days late — not current holdings: a position may have changed or closed since the quarter ended.
Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars; each record notes its original unit.
Affiliated managers may report the same position, so one position can appear under more than one filer.
Positions under confidential treatment may be omitted until a later amendment discloses them.
These are disclosures, not investment advice.