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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
BBBY
3101
PUT
Bed Bath & Beyond
BBBY
$501M
| $353K | ﹤0.01% |
667
-757
| -53% | -$5.07K |
|
3102
CALL
Credit Acceptance
CACC
$5.89B
| $353K | ﹤0.01% |
8
-107
| -93% | -$47.1K |
|
3103
CALL
Henry Schein
HSIC
$9.75B
| $353K | ﹤0.01% |
53
-73
| -58% | -$4.83K |
|
3104
CALL
ING
ING
$95.4B
| $353K | ﹤0.01% |
293
-264
| -47% | -$3.02K |
|
3105
PUT
Vanguard Total Bond Market
BND
$158B
| $352K | ﹤0.01% |
42
+22
| +110% | +$1.85K |
|
3106
PUT
City Holding Co
CHCO
$2.01B
| $352K | ﹤0.01% |
+43
| New | +$3.41K |
|
|
SAFM
3107
PUT
DELISTED
Sanderson Farms Inc
SAFM
| $352K | ﹤0.01% |
20
+9
| +82% | +$1.42K |
|
|
PFPT
3108
DELISTED
Proofpoint, Inc.
PFPT
| $352K | ﹤0.01% |
3,071
-11,131
| -78% | -$1.33M |
|
3109
PUT
BGC Group
BGC
$5.58B
| $350K | ﹤0.01% |
590
-994
| -63% | -$5.61K |
|
3110
CALL
Encore Capital Group
ECPG
$1.99B
| $350K | ﹤0.01% |
99
+71
| +254% | +$2.48K |
|
3111
Insperity
NSP
$1.93B
| $350K | ﹤0.01% |
+4,073
| New | +$354K |
|
3112
Range Resources
RRC
$9.05B
| $350K | ﹤0.01% |
72,273
+43,433
| +151% | +$175K |
|
|
OSG
3113
Octave Specialty Group
OSG
$258M
| $349K | ﹤0.01% |
16,214
+8,482
| +110% | +$174K |
|
3114
CALL
Cedar Fair
FUN
$1.79B
| $349K | ﹤0.01% |
63
-173
| -73% | -$9.74K |
|
3115
CALL
Red Rock Resorts
RRR
$3.8B
| $349K | ﹤0.01% |
146
-526
| -78% | -$11.7K |
|
|
TELL
3116
PUT
DELISTED
Tellurian Inc.
TELL
| $349K | ﹤0.01% |
480
-459
| -49% | -$3.49K |
|
|
CY
3117
CALL
DELISTED
Cypress Semiconductor
CY
| $349K | ﹤0.01% |
150
-16
| -10% | -$374 |
|
3118
CALL
Glaukos
GKOS
$8.9B
| $348K | ﹤0.01% |
64
+46
| +256% | +$2.8K |
|
3119
PUT
Jones Lang LaSalle
JLL
$15.4B
| $348K | ﹤0.01% |
20
+19
| +1,900% | +$2.99K |
|
3120
PUT
Olin
OLN
$2.52B
| $348K | ﹤0.01% |
202
+65
| +47% | +$1.16K |
|
|
ONC
3121
CALL
BeOne Medicines Ltd
ONC
$34B
| $348K | ﹤0.01% |
21
+2
| +11% | +$332 |
|
3122
Papa John's
PZZA
$1.02B
| $347K | ﹤0.01% |
+5,501
| New | +$326K |
|
3123
Invesco CurrencyShares Canadian Dollar Trust
FXC
$72.7M
| $346K | ﹤0.01% |
4,557
+1,625
| +55% | +$122K |
|
3124
PUT
LGI Homes
LGIH
$1.42B
| $346K | ﹤0.01% |
49
-203
| -81% | -$15.4K |
|
|
UMH
3125
PUT
UMH Properties
UMH
$1.33B
| $346K | ﹤0.01% |
220
+200
| +1,000% | +$3.02K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.