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 | |
|---|---|---|---|---|---|---|
|
EGRX
2126
PUT
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $825K | ﹤0.01% |
146
-109
| -43% | -$6.13K |
|
|
EBIX
2127
CALL
DELISTED
Ebix Inc
EBIX
| $825K | ﹤0.01% |
196
-274
| -58% | -$11.5K |
|
2128
CALL
Fate Therapeutics
FATE
$281M
| $824K | ﹤0.01% |
531
+356
| +203% | +$6.82K |
|
2129
CALL
ProShares UltraShort Industrials
SIJ
$5.74M
| $822K | ﹤0.01% |
17
-12
| -41% | -$2.45K |
|
2130
CALL
Textron
TXT
$16.6B
| $822K | ﹤0.01% |
168
-178
| -51% | -$8.69K |
|
2131
PUT
Cognex
CGNX
$10.3B
| $820K | ﹤0.01% |
167
+91
| +120% | +$4.11K |
|
2132
PUT
Huntington Bancshares
HBAN
$35.1B
| $820K | ﹤0.01% |
575
-1,099
| -66% | -$15K |
|
2133
CALL
JetBlue
JBLU
$1.96B
| $820K | ﹤0.01% |
490
-33
| -6% | -$599 |
|
|
NEWR
2134
DELISTED
New Relic, Inc.
NEWR
| $820K | ﹤0.01% |
+13,360
| New | +$966K |
|
2135
CALL
American Financial Group
AFG
$11.9B
| $819K | ﹤0.01% |
76
-21
| -22% | -$2.17K |
|
2136
CALL
Crown Holdings
CCK
$12.8B
| $819K | ﹤0.01% |
124
+45
| +57% | +$2.88K |
|
2137
PUT
Xerox
XRX
$337M
| $819K | ﹤0.01% |
274
+102
| +59% | +$3.2K |
|
2138
PUT
KeyCorp
KEY
$24.3B
| $818K | ﹤0.01% |
459
-31
| -6% | -$536 |
|
2139
CALL
NIO
NIO
$11.3B
| $818K | ﹤0.01% |
5,249
-3,103
| -37% | -$9.49K |
|
|
CHK
2140
PUT
DELISTED
Chesapeake Energy Corporation
CHK
| $816K | ﹤0.01% |
29
+24
| +480% | +$7.8K |
|
2141
PUT
Henry Schein
HSIC
$9.74B
| $812K | ﹤0.01% |
128
-7
| -5% | -$452 |
|
2142
PUT
MKS Inc
MKSI
$22.2B
| $812K | ﹤0.01% |
88
-3
| -3% | -$248 |
|
|
USCR
2143
PUT
DELISTED
U S Concrete, Inc.
USCR
| $812K | ﹤0.01% |
147
+101
| +220% | +$4.72K |
|
2144
CALL
Ecolab
ECL
$75.6B
| $811K | ﹤0.01% |
41
-408
| -91% | -$81.8K |
|
2145
abrdn Physical Gold Shares ETF
SGOL
$6.92B
| $811K | ﹤0.01% |
57,160
-22,180
| -28% | -$315K |
|
|
PBFX
2146
CALL
DELISTED
PBF LOGISTICS LP
PBFX
| $810K | ﹤0.01% |
383
+290
| +312% | +$6.09K |
|
|
MIC
2147
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $810K | ﹤0.01% |
20,547
+13,559
| +194% | +$535K |
|
2148
CALL
Boyd Gaming
BYD
$6.47B
| $809K | ﹤0.01% |
338
+168
| +99% | +$4.25K |
|
2149
Toll Brothers
TOL
$14B
| $809K | ﹤0.01% |
19,717
+18,398
| +1,395% | +$678K |
|
2150
CALL
Precigen
PGEN
$1.93B
| $808K | ﹤0.01% |
1,413
-718
| -34% | -$4.88K |
|
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.