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 | |
|---|---|---|---|---|---|---|
3776
CALL
SSR Mining
SSRM
$5.33B
| $178K | ﹤0.01% |
205
+196
| +2,178% | +$1.85K |
|
|
PENG
3777
Penguin Solutions Inc
PENG
$2.42B
| $178K | ﹤0.01% |
12,422
+11,462
| +1,194% | +$179K |
|
|
PVG
3778
CALL
DELISTED
PRETIUM RESOURCES INC.
PVG
| $178K | ﹤0.01% |
235
+153
| +187% | +$1.26K |
|
|
CTB
3779
DELISTED
Cooper Tire & Rubber Co.
CTB
| $178K | ﹤0.01% |
6,312
-3,044
| -33% | -$86.8K |
|
|
EV
3780
CALL
DELISTED
Eaton Vance Corp.
EV
| $178K | ﹤0.01% |
34
-2
| -6% | -$106 |
|
3781
PUT
ABM Industries
ABM
$2.87B
| $177K | ﹤0.01% |
55
-15
| -21% | -$475 |
|
3782
BorgWarner
BWA
$12.9B
| $177K | ﹤0.01% |
+4,703
| New | +$185K |
|
3783
PUT
Blackstone Mortgage Trust
BXMT
$2.83B
| $177K | ﹤0.01% |
53
+28
| +112% | +$935 |
|
3784
Sempra
SRE
$59.7B
| $177K | ﹤0.01% |
3,124
-4,852
| -61% | -$281K |
|
|
TGI
3785
PUT
DELISTED
Triumph Group
TGI
| $177K | ﹤0.01% |
76
-124
| -62% | -$2.6K |
|
3786
CALL
UGI
UGI
$7.98B
| $177K | ﹤0.01% |
32
+18
| +129% | +$970 |
|
3787
CALL
Worthington Enterprises
WOR
$2.87B
| $177K | ﹤0.01% |
67
+52
| +347% | +$1.46K |
|
|
ATCO
3788
PUT
DELISTED
Atlas Corp.
ATCO
| $177K | ﹤0.01% |
213
+64
| +43% | +$576 |
|
3789
Corbus Pharmaceuticals
CRBP
$167M
| $176K | ﹤0.01% |
+781
| New | +$126K |
|
3790
iShares S&P 500 Value ETF
IVE
$49.6B
| $176K | ﹤0.01% |
+1,521
| New | +$175K |
|
3791
PUT
MannKind Corp
MNKD
$1.2B
| $176K | ﹤0.01% |
963
+823
| +588% | +$1.26K |
|
3792
CALL
Rollins
ROL
$18.7B
| $176K | ﹤0.01% |
65
-34
| -34% | -$877 |
|
3793
PUT
Tilly's
TLYS
$117M
| $176K | ﹤0.01% |
93
+37
| +66% | +$636 |
|
|
NSTG
3794
DELISTED
NanoString Technologies, Inc.
NSTG
| $176K | ﹤0.01% |
9,897
+5,631
| +132% | +$82.2K |
|
|
NXGN
3795
PUT
DELISTED
NextGen Healthcare, Inc. Common Stock
NXGN
| $176K | ﹤0.01% |
88
+87
| +8,700% | +$1.84K |
|
|
CA
3796
CALL
DELISTED
CA, Inc.
CA
| $176K | ﹤0.01% |
40
-443
| -92% | -$19.1K |
|
3797
Apogee Enterprises
APOG
$875M
| $175K | ﹤0.01% |
4,258
+1,870
| +78% | +$90.4K |
|
3798
AXT Inc
AXTI
$2.78B
| $175K | ﹤0.01% |
24,572
+14,395
| +141% | +$110K |
|
3799
PUT
Carlyle Group
CG
$16.7B
| $175K | ﹤0.01% |
78
+13
| +20% | +$306 |
|
3800
CNA Financial
CNA
$15B
| $175K | ﹤0.01% |
3,843
+267
| +7% | +$12.3K |
|
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.