Spark Investment Management LLC — 13F Holdings & Portfolio
CIK 1554871 · latest 13F-HR filed 2026-08-10
Spark Investment Management LLC manages $51.2M in 13F-reported U.S. long-equity assets across 72 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are AMZN (20.09%), BB (8.22%), SPOT (6.27%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 49 new positions and exited 5; 8 existing positions rose in reported value and 12 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Long-equity book
Distinct positions
Filed 2026-08-10
vs 2026-03-31
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q2 26Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q1 26 → Q2 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 60.9%Cumulative share of the portfolio held in the largest N positions.
As of the firm’s regulatory filing dated Mar 30, 2026.
26TH FLOOR
NEW YORK, NY 10155-0002
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| DROPKIN, GLENN, ELLIOT Control | CHIEF COMPLIANCE OFFICER since Jan 2012 | Less than 5% | Individual |
| LAVENTHOL, PETER, LAWRENCE Control | MANAGER since Nov 2011 | Less than 5% | Individual |
| SPARK HOLDINGS LLC Control | MEMBER since Jun 2013 | 75% or more | Domestic Entity |
| LAVENTHOL, PETER, LAWRENCE Control Indirect owner via SPARK HOLDINGS LLC | MANAGING MEMBER since Jun 2013 | 75% or more | Individual |
Ownership & leadership changes · 4 filings with changes since Jan 20, 2012
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
- ChangedLAVENTHOL, PETER, LAWRENCE · indirect via SPARK HOLDINGS LLC: title MEMBER MANAGER → MANAGING MEMBER; ownership 50–75% → 75% or more
- ChangedLAVENTHOL, PETER, LAWRENCE · indirect via SPARK HOLDINGS LLC: ownership 75% or more → 50–75%
- No longer listedLAVENTHOL, PETER, LAWRENCE · MEMBER MANAGER · 75% or more · indirect via SPARK HOLDIGNS LLC · control person · listed since Jun 2013
- AddedLAVENTHOL, PETER, LAWRENCE · MEMBER MANAGER · 75% or more · indirect via SPARK HOLDINGS LLC · control person
- No longer listedLAVENTHOL, PETER, LAWRENCE · LIMITED PARTNER · 75% or more · indirect via SPARK MANAGEMENT L.P. · control person · listed since May 1995
- No longer listedSPARK MANAGEMENT INC. · GENERAL PARTNER · General partner, trustee or manager · indirect via SPARK MANAGEMENT L.P. · control person · listed since May 1995
- No longer listedSPARK MANAGEMENT L.P. · MEMBER · 75% or more · control person · listed since Dec 2011
- AddedLAVENTHOL, PETER, LAWRENCE · MEMBER MANAGER · 75% or more · indirect via SPARK HOLDIGNS LLC · control person
- AddedSPARK HOLDINGS LLC · MEMBER · 75% or more · control person
- ListedDROPKIN, GLENN, ELLIOT · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
- ListedLAVENTHOL, PETER, LAWRENCE · MANAGER · Less than 5% · control person
- ListedLAVENTHOL, PETER, LAWRENCE · LIMITED PARTNER · 75% or more · indirect via SPARK MANAGEMENT L.P. · control person
- ListedSPARK MANAGEMENT INC. · GENERAL PARTNER · General partner, trustee or manager · indirect via SPARK MANAGEMENT L.P. · control person
- ListedSPARK MANAGEMENT L.P. · MEMBER · 75% or more · control person
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- AMAZON COM INC$1.3M +14.4%
- TWILIO INC$418.7K +64.0%
- TESLA INC$293.1K +13.1%
- BARRICK MNG CORP$284.3K +18.3%
- BLOCK INC$137.6K +26.3%
Top Trims
- VERMILION ENERGY INC-$2.2M -56.9%
- PRECISION DRILLING CORP-$1.3M -54.5%
- OPEN TEXT CORP-$585.0K -43.0%
- KINROSS GOLD CORP-$488.4K -25.4%
- SPROTT INC-$433.9K -43.4%
New Positions
- BLACKBERRY LTD$4.2M
- CELESTICA INC$1.1M
- ARTERIS INC$1.1M
- BAYTEX ENERGY CORP$1.0M
- SILVERCORP METALS INC$829.4K
Exited Positions
- BRP INC$1.9M
- DOCEBO INC$473.0K
- MAGNA INTL INC$446.6K
- ROGERS COMMUNICATIONS INC$346.0K
- ELDORADO GOLD CORP NEW$206.0K
Spark Investment Management LLC Holdings (2026-06-30)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | AMAZON COM INC | AMZN | 023135106 | $10.3M | 20.09% | 43,180 | SH |
| 2 | BLACKBERRY LTD | BB | 09228F103 | $4.2M | 8.22% | 334,000 | SH |
| 3 | SPOTIFY TECHNOLOGY S A | SPOT | L8681T102 | $3.2M | 6.27% | 7,000 | SH |
| 4 | TESLA INC | TSLA | 88160R101 | $2.5M | 4.93% | 6,000 | SH |
| 5 | CENTERRA GOLD INC | CGAU | 152006102 | $2.3M | 4.54% | 147,000 | SH |
| 6 | LIGHTSPEED COMMERCE INC | LSPD | 53229C107 | $1.9M | 3.80% | 186,000 | SH |
| 7 | BARRICK MNG CORP | B | 06849F108 | $1.8M | 3.58% | 50,000 | SH |
| 8 | ENERFLEX LTD | EFXT | 29269R105 | $1.7M | 3.35% | 70,000 | SH |
| 9 | VERMILION ENERGY INC | VET | 923725105 | $1.7M | 3.30% | 181,000 | SH |
| 10 | KINROSS GOLD CORP | KGC | 496902404 | $1.4M | 2.80% | 60,750 | SH |
| 11 | CELESTICA INC | CLS | 15101Q207 | $1.1M | 2.13% | 3,000 | SH |
| 12 | OBSIDIAN ENERGY LTD | OBE | 674482203 | $1.1M | 2.12% | 133,000 | SH |
| 13 | PRECISION DRILLING CORP | PDS | 74022D407 | $1.1M | 2.10% | 14,000 | SH |
| 14 | ARTERIS INC | AIP | 04302A104 | $1.1M | 2.10% | 22,100 | SH |
| 15 | TWILIO INC | TWLO | 90138F102 | $1.1M | 2.09% | 5,200 | SH |
| 16 | BAYTEX ENERGY CORP | BTE | 07317Q105 | $1.0M | 2.03% | 259,000 | SH |
| 17 | SILVERCORP METALS INC | SVM | 82835P103 | $829.4K | 1.62% | 82,000 | SH |
| 18 | AMBIQ MICRO INC | AMBQ | 023193105 | $777.0K | 1.52% | 8,800 | SH |
| 19 | OPEN TEXT CORP | OTEX | 683715106 | $773.9K | 1.51% | 35,000 | SH |
| 20 | NVIDIA CORPORATION | NVDA | 67066G104 | $700.3K | 1.37% | 3,500 | SH |
| 21 | CENOVUS ENERGY INC | CVE | 15135U109 | $694.1K | 1.35% | 28,000 | SH |
| 22 | BLOCK INC | XYZ | 852234103 | $661.2K | 1.29% | 8,700 | SH |
| 23 | SOUTH BOW CORP | SOBO | 83671M105 | $598.3K | 1.17% | 17,000 | SH |
| 24 | PAN AMERN SILVER CORP | PAAS | 697900108 | $582.2K | 1.14% | 13,000 | SH |
| 25 | DROPBOX INC | DBX | 26210C104 | $576.9K | 1.13% | 21,000 | SH |
| 26 | SPROTT INC | SII | 852066208 | $564.7K | 1.10% | 5,000 | SH |
| 27 | CANADA GOOSE HLDGS INC | GOOS | 135086106 | $548.7K | 1.07% | 58,000 | SH |
| 28 | AGNICO EAGLE MINES LTD | AEM | 008474108 | $465.7K | 0.91% | 3,000 | SH |
| 29 | MONDAY COM LTD | MNDY | M7S64H106 | $427.1K | 0.83% | 5,900 | SH |
| 30 | FORTUNA MNG CORP | FSM | 349942102 | $380.1K | 0.74% | 45,000 | SH |
| 31 | DIGI INTL INC | DGII | 253798102 | $374.8K | 0.73% | 5,000 | SH |
| 32 | FASTLY INC | FSLY | 31188V100 | $339.7K | 0.66% | 18,500 | SH |
| 33 | DIEBOLD NIXDORF INC | DBD | 253651202 | $306.1K | 0.60% | 3,600 | SH |
| 34 | SILVACO GROUP INC | SVCO | 82728C102 | $303.0K | 0.59% | 21,974 | SH |
| 35 | DIGITALOCEAN HLDGS INC | DOCN | 25402D102 | $267.0K | 0.52% | 1,700 | SH |
| 36 | BITDEER TECHNOLOGIES GROUP | BTDR | G11448100 | $241.2K | 0.47% | 15,200 | SH |
| 37 | FOSSIL GROUP INC | FOSL | 34988V106 | $231.4K | 0.45% | 55,900 | SH |
| 38 | KYVERNA THERAPEUTICS INC | KYTX | 501976104 | $223.6K | 0.44% | 25,100 | SH |
| 39 | HUDBAY MINERALS INC | HBM | 443628102 | $212.3K | 0.41% | 9,000 | SH |
| 40 | ONE STOP SYS INC | OSS | 68247W109 | $207.3K | 0.40% | 11,400 | SH |
| 41 | ONESPAN INC | OSPN | 68287N100 | $190.9K | 0.37% | 13,300 | SH |
| 42 | CORSAIR GAMING INC | CRSR | 22041X102 | $184.7K | 0.36% | 19,100 | SH |
| 43 | CLIMB BIO INC | CLYM | 28658R106 | $177.3K | 0.35% | 13,600 | SH |
| 44 | ARTIVA BIOTHERAPEUTICS INC | ARTV | 04317A107 | $160.1K | 0.31% | 16,500 | SH |
| 45 | CENTURY THERAPEUTICS INC | IPSC | 15673T100 | $144.6K | 0.28% | 59,000 | SH |
| 46 | PUMA BIOTECHNOLOGY INC | PBYI | 74587V107 | $137.9K | 0.27% | 17,000 | SH |
| 47 | MAKO MNG CORP | MAKO | 56089A400 | $118.2K | 0.23% | 16,092 | SH |
| 48 | SMARTBIRD INC | BIRD | 01675A208 | $110.5K | 0.22% | 27,634 | SH |
| 49 | GCT SEMICONDUCTOR HLDG INC | GCTS | 36170N107 | $110.2K | 0.22% | 37,100 | SH |
| 50 | OVID THERAPEUTICS INC | OVID | 690469101 | $85.5K | 0.17% | 31,800 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-10 | $51.2M | 72 | 0000899140-26-000792 |
| 2026-03-31 | 2026-05-11 | $41.6M | 28 | 0000899140-26-000429 |
| 2025-12-31 | 2026-02-11 | $40.2M | 27 | 0000899140-26-000156 |
| 2025-09-30 | 2025-11-12 | $39.8M | 20 | 0000899140-25-001262 |
26TH FLOOR
NEW YORK, NY 10155