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
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
TUP
2426
PUT
DELISTED
Tupperware Brands Corporation
TUP
| $407K | ﹤0.01% |
129
+86
| +200% | +$2.99K |
|
2427
CALL
Polaris
PII
$4.15B
| $406K | ﹤0.01% |
53
+27
| +104% | +$2.43K |
|
2428
CALL
Western Alliance Bancorporation
WAL
$9.07B
| $406K | ﹤0.01% |
103
+102
| +10,200% | +$4.82K |
|
2429
KLA
KLAC
$275B
| $405K | ﹤0.01% |
+45,330
| New | +$422K |
|
2430
Global X Lithium & Battery Tech ETF
LIT
$1.49B
| $404K | ﹤0.01% |
14,999
+11,322
| +308% | +$344K |
|
2431
PUT
Pilgrim's Pride
PPC
$6.82B
| $404K | ﹤0.01% |
261
+70
| +37% | +$1.25K |
|
|
AERI
2432
DELISTED
Aerie Pharmaceuticals
AERI
| $404K | ﹤0.01% |
11,209
-10,344
| -48% | -$485K |
|
2433
PUT
Timken Company
TKR
$9.82B
| $403K | ﹤0.01% |
108
+95
| +731% | +$3.84K |
|
2434
CALL
Visteon
VC
$2.77B
| $403K | ﹤0.01% |
67
-168
| -71% | -$12.7K |
|
|
CVSA
2435
CALL
Covista Inc
CVSA
$3.94B
| $402K | ﹤0.01% |
85
-68
| -44% | -$3.48K |
|
|
SEE
2436
DELISTED
Sealed Air
SEE
| $401K | ﹤0.01% |
+11,528
| New | +$402K |
|
|
RPT
2437
CALL
DELISTED
RPT Realty Common Shares of Beneficial Interest (MD)
RPT
| $401K | ﹤0.01% |
336
+226
| +205% | +$2.98K |
|
2438
PUT
Diodes
DIOD
$4B
| $400K | ﹤0.01% |
124
-117
| -49% | -$3.74K |
|
|
SEE
2439
CALL
DELISTED
Sealed Air
SEE
| $400K | ﹤0.01% |
115
-28
| -20% | -$977 |
|
2440
CALL
InfraCap MLP ETF
AMZA
$471M
| $398K | ﹤0.01% |
79
+13
| +20% | +$829 |
|
2441
PUT
Sonoco
SON
$5.76B
| $398K | ﹤0.01% |
75
+70
| +1,400% | +$3.84K |
|
2442
BioMarin Pharmaceuticals
BMRN
$11.5B
| $397K | ﹤0.01% |
4,670
-4,553
| -49% | -$433K |
|
2443
CALL
Inogen
INGN
$167M
| $397K | ﹤0.01% |
32
-16
| -33% | -$2.63K |
|
2444
Travere Therapeutics
TVTX
$5.33B
| $397K | ﹤0.01% |
+17,548
| New | +$437K |
|
2445
Lithia Motors
LAD
$7.78B
| $396K | ﹤0.01% |
5,188
+4,649
| +863% | +$368K |
|
2446
CALL
Tanger
SKT
$4.82B
| $396K | ﹤0.01% |
196
+120
| +158% | +$2.7K |
|
2447
PUT
Welltower
WELL
$178B
| $395K | ﹤0.01% |
57
-41
| -42% | -$2.79K |
|
2448
CALL
EPAM Systems
EPAM
$4.69B
| $394K | ﹤0.01% |
34
-148
| -81% | -$18.2K |
|
2449
PUT
Fossil Group
FOSL
$239M
| $393K | ﹤0.01% |
250
+127
| +103% | +$2.46K |
|
|
PTR
2450
CALL
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $393K | ﹤0.01% |
64
| – | – |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.