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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1576
United Parks & Resorts
PRKS
$2.11B
| $122K | 0.01% |
6,690
+2,988
| +81% | +$55.6K |
|
|
SINA
1577
CALL
DELISTED
Sina Corp
SINA
| $122K | 0.01% |
339
-382
| -53% | -$27K |
|
|
ANW
1578
CALL
DELISTED
Aegean Marine Petroleum Network
ANW
| $122K | 0.01% |
975
+212
| +28% | +$2.31K |
|
|
ALR
1579
PUT
DELISTED
Alere Inc
ALR
| $122K | 0.01% |
753
-366
| -33% | -$14.3K |
|
1580
iShares MSCI Canada ETF
EWC
$6.04B
| $121K | 0.01% |
4,506
-1,928
| -30% | -$52K |
|
1581
PUT
GameStop
GME
$9.5B
| $121K | 0.01% |
4,756
+912
| +24% | +$5.57K |
|
1582
PUT
Immersion
IMMR
$216M
| $121K | 0.01% |
739
+120
| +19% | +$1.19K |
|
|
MOMO
1583
Hello Group
MOMO
$869M
| $121K | 0.01% |
3,575
-46,452
| -93% | -$1.24M |
|
1584
PUT
Royal Caribbean
RCL
$78.7B
| $121K | 0.01% |
1,665
+744
| +81% | +$69.6K |
|
1585
CALL
Texas Capital Bancshares
TCBI
$4.31B
| $121K | 0.01% |
188
-173
| -48% | -$14.5K |
|
|
APC
1586
CALL
DELISTED
Anadarko Petroleum
APC
| $121K | 0.01% |
1,055
-388
| -27% | -$25.8K |
|
1587
PUT
Axos Financial
AX
$5.45B
| $120K | 0.01% |
364
+1
| +0.3% | +$29 |
|
1588
Cal-Maine
CALM
$4.28B
| $120K | 0.01% |
3,265
-8,034
| -71% | -$321K |
|
1589
CALL
Harley-Davidson
HOG
$2.68B
| $120K | 0.01% |
688
-5
| -0.7% | -$294 |
|
1590
PUT
Mastercard
MA
$477B
| $120K | 0.01% |
1,857
+372
| +25% | +$40.8K |
|
1591
PUT
Philip Morris
PM
$301B
| $120K | 0.01% |
1,261
-1,792
| -59% | -$185K |
|
1592
PUT
Suncor Energy
SU
$77.7B
| $120K | 0.01% |
914
-32
| -3% | -$1.01K |
|
1593
TAL Education Group
TAL
$5.71B
| $120K | 0.01% |
6,780
-49,506
| -88% | -$718K |
|
|
ARNA
1594
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $120K | 0.01% |
8,270
+7,208
| +679% | +$107K |
|
|
CNXM
1595
DELISTED
CNX Midstream Partners LP
CNXM
| $120K | 0.01% |
+5,114
| New | +$118K |
|
|
CHK
1596
PUT
DELISTED
Chesapeake Energy Corporation
CHK
| $120K | 0.01% |
9
-9
| -50% | -$10.9K |
|
|
SHPG
1597
CALL
DELISTED
Shire pic
SHPG
| $120K | 0.01% |
405
+57
| +16% | +$9.96K |
|
1598
CALL
Dell
DELL
$283B
| $119K | 0.01% |
1,151
-880
| -43% | -$15.4K |
|
1599
CALL
Equinix
EQIX
$107B
| $119K | 0.01% |
109
+87
| +395% | +$33K |
|
|
K
1600
CALL
DELISTED
Kellanova
K
| $119K | 0.01% |
1,141
+560
| +96% | +$38.7K |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.