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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
OAK
3301
CALL
DELISTED
OAKTREE CAPITAL GROUP, LLC
OAK
| $269K | ﹤0.01% |
65
+15
| +30% | +$617 |
|
|
REV
3302
DELISTED
Revlon, Inc.
REV
| $269K | ﹤0.01% |
12,100
+2,323
| +24% | +$44K |
|
3303
CALL
Floor & Decor
FND
$5.87B
| $268K | ﹤0.01% |
89
-63
| -41% | -$2.57K |
|
3304
Northern Oil and Gas
NOG
$2.24B
| $268K | ﹤0.01% |
6,720
+5,385
| +403% | +$182K |
|
3305
PUT
Republic Services
RSG
$66.9B
| $268K | ﹤0.01% |
37
-28
| -43% | -$2.03K |
|
3306
CALL
Turkcell
TKC
$4.75B
| $268K | ﹤0.01% |
558
+429
| +333% | +$2.27K |
|
3307
Bruker
BRKR
$9.24B
| $267K | ﹤0.01% |
8,011
+7,209
| +899% | +$237K |
|
3308
CALL
Global Payments
GPN
$22.5B
| $267K | ﹤0.01% |
21
+8
| +62% | +$962 |
|
3309
KB Home
KBH
$3.53B
| $267K | ﹤0.01% |
11,175
+10,098
| +938% | +$253K |
|
|
ODP
3310
CALL
DELISTED
ODP
ODP
| $267K | ﹤0.01% |
83
+21
| +34% | +$629 |
|
3311
Canadian National Railway
CNI
$78.5B
| $266K | ﹤0.01% |
2,967
+549
| +23% | +$47.9K |
|
3312
Canadian Natural Resources
CNQ
$94.9B
| $266K | ﹤0.01% |
16,655
+7,164
| +75% | +$121K |
|
|
AKCA
3313
CALL
DELISTED
Akcea Therapeutics Inc
AKCA
| $266K | ﹤0.01% |
+76
| New | +$2.3K |
|
|
DNR
3314
CALL
DELISTED
Denbury Resources, Inc.
DNR
| $266K | ﹤0.01% |
430
-378
| -47% | -$1.89K |
|
3315
PUT
Arrow Electronics
ARW
$10.8B
| $265K | ﹤0.01% |
36
+29
| +414% | +$2.23K |
|
3316
Direxion Daily MSCI Emerging Markets Bull 3X ETF
EDC
$149M
| $265K | ﹤0.01% |
3,127
+1,436
| +85% | +$127K |
|
3317
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$268M
| $265K | ﹤0.01% |
49
+2
| +4% | +$86 |
|
|
CONN
3318
CALL
DELISTED
Conn's Inc.
CONN
| $265K | ﹤0.01% |
75
-160
| -68% | -$5.72K |
|
|
PGTI
3319
DELISTED
PGT, Inc.
PGTI
| $265K | ﹤0.01% |
12,286
-6,948
| -36% | -$162K |
|
|
TEN
3320
CALL
DELISTED
Tenneco Inc. Class A Voting Common Stock
TEN
| $265K | ﹤0.01% |
63
-103
| -62% | -$4.52K |
|
3321
Ericsson
ERIC
$31.6B
| $264K | ﹤0.01% |
30,076
-53,683
| -64% | -$440K |
|
3322
Gerdau
GGB
$9.34B
| $264K | ﹤0.01% |
79,166
-93,421
| -54% | -$301K |
|
3323
Patterson-UTI
PTEN
$3.75B
| $264K | ﹤0.01% |
15,443
+11,192
| +263% | +$192K |
|
3324
PUT
Banco Santander
SAN
$200B
| $264K | ﹤0.01% |
553
-178
| -24% | -$896 |
|
3325
PUT
Broadridge
BR
$17.6B
| $263K | ﹤0.01% |
20
+8
| +67% | +$1.01K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.