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 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3151
Veracyte
VCYT
$4.45B
| $277K | ﹤0.01% |
+9,720
| New | +$243K |
|
|
FTR
3152
CALL
DELISTED
Frontier Communications Corp.
FTR
| $277K | ﹤0.01% |
1,585
+1,139
| +255% | +$2.32K |
|
3153
CALL
Brink's
BCO
$4.8B
| $276K | ﹤0.01% |
34
-33
| -49% | -$2.63K |
|
3154
CALL
Garrett Motion
GTX
$5.53B
| $276K | ﹤0.01% |
+180
| New | +$3.06K |
|
3155
PUT
Paysign
PAYS
$513M
| $276K | ﹤0.01% |
+207
| New | +$1.97K |
|
|
ZUO
3156
DELISTED
Zuora, Inc.
ZUO
| $276K | ﹤0.01% |
18,029
+3,300
| +22% | +$62.5K |
|
|
COR
3157
CALL
DELISTED
Coresite Realty Corporation
COR
| $276K | ﹤0.01% |
+24
| New | +$2.72K |
|
|
MIK
3158
CALL
DELISTED
Michaels Stores, Inc
MIK
| $276K | ﹤0.01% |
318
-778
| -71% | -$8.22K |
|
3159
GoDaddy
GDDY
$13.5B
| $275K | ﹤0.01% |
3,929
+2,800
| +248% | +$211K |
|
3160
PUT
Golar LNG
GLNG
$4.96B
| $275K | ﹤0.01% |
149
+24
| +19% | +$457 |
|
3161
CALL
Moderna
MRNA
$21.9B
| $275K | ﹤0.01% |
188
-158
| -46% | -$3.39K |
|
3162
Unisys
UIS
$254M
| $275K | ﹤0.01% |
28,304
+10,371
| +58% | +$107K |
|
|
TELL
3163
DELISTED
Tellurian Inc.
TELL
| $275K | ﹤0.01% |
+35,088
| New | +$312K |
|
3164
CALL
SPX Corp
SPXC
$10.3B
| $274K | ﹤0.01% |
83
+6
| +8% | +$200 |
|
|
MGI
3165
CALL
DELISTED
MoneyGram International, Inc. New
MGI
| $274K | ﹤0.01% |
1,112
+1,081
| +3,487% | +$2.42K |
|
3166
CALL
American Eagle Outfitters
AEO
$3.03B
| $273K | ﹤0.01% |
162
+108
| +200% | +$2.19K |
|
|
BPT
3167
PUT
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $273K | ﹤0.01% |
177
-119
| -40% | -$2.34K |
|
|
MPT
3168
CALL
Medical Properties Trust
MPT
$2.86B
| $273K | ﹤0.01% |
157
+43
| +38% | +$774 |
|
3169
Advanced Drainage Systems
WMS
$11.1B
| $273K | ﹤0.01% |
+8,349
| New | +$241K |
|
3170
Zymeworks
ZYME
$1.65B
| $273K | ﹤0.01% |
12,441
+11,895
| +2,179% | +$218K |
|
|
CAI
3171
CALL
DELISTED
CAI International, Inc.
CAI
| $273K | ﹤0.01% |
110
+99
| +900% | +$2.37K |
|
3172
PUT
Corteva
CTVA
$59.6B
| $272K | ﹤0.01% |
+92
| New | +$2.48K |
|
3173
VirnetX Holding Corp
VHC
$54M
| $272K | ﹤0.01% |
2,194
-575
| -21% | -$71.8K |
|
|
MDC
3174
CALL
DELISTED
M.D.C. Holdings, Inc.
MDC
| $272K | ﹤0.01% |
90
-27
| -23% | -$795 |
|
|
VSI
3175
DELISTED
Vitamin Shoppe Inc.
VSI
| $272K | ﹤0.01% |
69,036
+27,162
| +65% | +$140K |
|
Similar funds
Simplex Trading's Q2 2019 Portfolio in Review
As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,301 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.
By sector, the portfolio is most concentrated in Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
- Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
- Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
- Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
- Simplex Trading opened 1,261 new positions and closed 1,301 in Q2 2019.
- Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.
Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.