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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1151
NetEase
NTES
$76.5B
| $2.52M | 0.01% |
+47,420
| New | +$2.41M |
|
1152
PUT
Axalta
AXTA
$7.01B
| $2.52M | 0.01% |
837
+541
| +183% | +$16K |
|
1153
PUT
Clorox
CLX
$11.6B
| $2.52M | 0.01% |
166
+13
| +8% | +$2.06K |
|
1154
PUT
Celanese
CE
$5.09B
| $2.52M | 0.01% |
206
+184
| +836% | +$20.7K |
|
|
ABB
1155
CALL
DELISTED
ABB Ltd
ABB
| $2.52M | 0.01% |
1,281
-769
| -38% | -$14.7K |
|
1156
CALL
Viasat
VSAT
$9.79B
| $2.52M | 0.01% |
334
-48
| -13% | -$3.82K |
|
1157
PUT
Woodward
WWD
$25B
| $2.51M | 0.01% |
233
+232
| +23,200% | +$25.5K |
|
1158
PUT
Jazz Pharmaceuticals
JAZZ
$15.9B
| $2.51M | 0.01% |
196
+185
| +1,682% | +$24.8K |
|
1159
PUT
Lear
LEA
$7.19B
| $2.51M | 0.01% |
213
-109
| -34% | -$13.3K |
|
1160
Ventas
VTR
$48.9B
| $2.51M | 0.01% |
34,358
+5,359
| +18% | +$380K |
|
|
Y
1161
DELISTED
Alleghany Corp
Y
| $2.5M | 0.01% |
+3,140
| New | +$2.31M |
|
1162
Colgate-Palmolive
CL
$72.6B
| $2.5M | 0.01% |
34,052
+23,064
| +210% | +$1.67M |
|
1163
CALL
Vanguard FTSE Europe ETF
VGK
$30B
| $2.5M | 0.01% |
532
-758
| -59% | -$40.5K |
|
|
CS
1164
PUT
DELISTED
Credit Suisse Group
CS
| $2.5M | 0.01% |
2,049
+726
| +55% | +$8.73K |
|
1165
PUT
Microchip Technology
MCHP
$42.8B
| $2.5M | 0.01% |
538
-208
| -28% | -$9.43K |
|
|
SEE
1166
CALL
DELISTED
Sealed Air
SEE
| $2.5M | 0.01% |
602
+158
| +36% | +$6.69K |
|
|
MDSO
1167
CALL
DELISTED
Medidata Solutions, Inc.
MDSO
| $2.5M | 0.01% |
273
-112
| -29% | -$10.2K |
|
1168
CALL
Innovative Industrial Properties
IIPR
$1.78B
| $2.49M | 0.01% |
270
+173
| +178% | +$18.2K |
|
1169
PUT
Nasdaq
NDAQ
$51.5B
| $2.49M | 0.01% |
753
+651
| +638% | +$21.6K |
|
1170
PUT
UBS Group
UBS
$170B
| $2.49M | 0.01% |
2,205
+1,060
| +93% | +$11.9K |
|
1171
Rio Tinto
RIO
$148B
| $2.48M | 0.01% |
+47,674
| New | +$2.59M |
|
1172
CALL
Ross Stores
ROST
$76.6B
| $2.48M | 0.01% |
226
+45
| +25% | +$4.75K |
|
|
CYBR
1173
CALL
DELISTED
CyberArk
CYBR
| $2.48M | 0.01% |
248
+82
| +49% | +$9.89K |
|
|
ICPT
1174
CALL
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $2.48M | 0.01% |
373
+100
| +37% | +$6.71K |
|
1175
CALL
Nektar Therapeutics
NKTR
$2.39B
| $2.47M | 0.01% |
90
+57
| +173% | +$20.9K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.