Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Apple
AAPL
|
$258M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
$75.7M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
$67.2M |
| 4 |
Alphabet (Google) Class C
GOOG
|
$59.4M |
| 5 |
Intel
INTC
|
$45.8M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$56.8M |
| 2 |
Direxion Daily FTSE China Bull 3X Shares
YINN
|
$50.4M |
| 3 |
iShares Silver Trust
SLV
|
$45.9M |
| 4 |
Ford
F
|
$32.5M |
| 5 |
Exxon Mobil
XOM
|
$20.4M |
Sector Composition
| 1 | Technology | 26.01% |
| 2 | Consumer Discretionary | 9.82% |
| 3 | Communication Services | 9.82% |
| 4 | Financials | 8.68% |
| 5 | Healthcare | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
B
51
Barrick Mining Corporation
B
$46.3B
| $11.4M | 0.01% |
647,133
-414,074
| -39% | -$7.32M |
|
52
SPDR Bloomberg High Yield Bond ETF
JNK
$8.06B
| $11M | 0.01% |
121,337
+55,662
| +85% | +$5.05M |
|
53
ProShares UltraPro Short QQQ
SQQQ
$2.38B
| $11M | 0.01% |
186,384
+131,737
| +241% | +$7.75M |
|
54
KraneShares CSI China Internet ETF
KWEB
$8.47B
| $10.7M | 0.01% |
327,849
-470,748
| -59% | -$15.4M |
|
55
Union Pacific
UNP
$131B
| $10.7M | 0.01% |
+50,004
| New | +$10.7M |
|
56
Teva Pharmaceuticals
TEVA
$21.5B
| $10.6M | 0.01% |
1,405,557
+336,675
| +31% | +$2.53M |
|
|
XYZ
57
Block, Inc.
XYZ
$46.4B
| $10.4M | 0.01% |
168,804
+165,204
| +4,589% | +$10.2M |
|
58
Abbott
ABT
$229B
| $10.2M | 0.01% |
+93,728
| New | +$10.2M |
|
59
Boeing
BA
$176B
| $9.5M | 0.01% |
69,479
+2,181
| +3% | +$298K |
|
60
Occidental Petroleum
OXY
$45.8B
| $9.43M | 0.01% |
160,189
+154,889
| +2,922% | +$9.12M |
|
61
Datadog
DDOG
$45.9B
| $9.1M | 0.01% |
95,574
+78,103
| +447% | +$7.44M |
|
|
ZEN
62
DELISTED
ZENDESK INC
ZEN
| $8.99M | 0.01% |
121,368
+85,012
| +234% | +$6.3M |
|
63
Mercado Libre
MELI
$119B
| $8.71M | 0.01% |
13,675
-278
| -2% | -$177K |
|
64
Deere & Co
DE
$127B
| $8.69M | 0.01% |
+29,032
| New | +$8.69M |
|
65
Marvell Technology
MRVL
$54.2B
| $8.65M | 0.01% |
198,820
+4,153
| +2% | +$181K |
|
66
Colgate-Palmolive
CL
$67.5B
| $8.29M | 0.01% |
+103,402
| New | +$8.29M |
|
67
British American Tobacco
BTI
$121B
| $8.27M | 0.01% |
192,809
+26,803
| +16% | +$1.15M |
|
68
Direxion Daily S&P Biotech Bull 3X Shares
LABU
$731M
| $8.16M | 0.01% |
1,210,548
+1,063,931
| +726% | +$7.17M |
|
69
CSX Corp
CSX
$59.8B
| $7.85M | 0.01% |
270,046
+193,904
| +255% | +$5.63M |
|
70
Hilton Worldwide
HLT
$65.3B
| $7.79M | 0.01% |
69,903
+58,874
| +534% | +$6.56M |
|
71
Royal Caribbean
RCL
$97.3B
| $7.78M | 0.01% |
222,896
+42,082
| +23% | +$1.47M |
|
72
ConocoPhillips
COP
$118B
| $7.67M | 0.01% |
+85,458
| New | +$7.67M |
|
73
Li Auto
LI
$24B
| $7.06M | 0.01% |
184,403
+184,218
| +99,577% | +$7.06M |
|
74
Cameco
CCJ
$33.7B
| $7.02M | 0.01% |
333,947
-133,721
| -29% | -$2.81M |
|
75
SPDR S&P MidCap 400 ETF Trust
MDY
$23.6B
| $6.99M | 0.01% |
16,897
+11,271
| +200% | +$4.66M |
|