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 | |
|---|---|---|---|---|---|---|
1101
CALL
Nice
NICE
$5.29B
| $2.67M | 0.01% |
186
+128
| +221% | +$19.1K |
|
1102
PUT
Nektar Therapeutics
NKTR
$2.39B
| $2.67M | 0.01% |
98
+53
| +118% | +$19.4K |
|
1103
CALL
Bath & Body Works
BBWI
$4.01B
| $2.67M | 0.01% |
1,687
+394
| +30% | +$6.95K |
|
1104
CALL
Service Corp International
SCI
$11.4B
| $2.67M | 0.01% |
558
+377
| +208% | +$17.7K |
|
1105
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$293M
| $2.67M | 0.01% |
109,510
+83,818
| +326% | +$2.21M |
|
1106
CALL
Teradyne
TER
$54.8B
| $2.66M | 0.01% |
460
+253
| +122% | +$13.4K |
|
1107
PUT
Southwest Airlines
LUV
$22.1B
| $2.66M | 0.01% |
493
-234
| -32% | -$12.2K |
|
1108
CALL
Nutanix
NTNX
$14.9B
| $2.66M | 0.01% |
1,012
-534
| -35% | -$12.6K |
|
|
JOYY
1109
CALL
JOYY Inc
JOYY
$3.73B
| $2.65M | 0.01% |
472
-216
| -31% | -$13.1K |
|
|
BERY
1110
CALL
DELISTED
Berry Global Group, Inc.
BERY
| $2.65M | 0.01% |
736
+605
| +462% | +$24.7K |
|
1111
CALL
Lattice Semiconductor
LSCC
$17.6B
| $2.65M | 0.01% |
1,449
+1,350
| +1,364% | +$24.7K |
|
|
AVLR
1112
PUT
DELISTED
Avalara, Inc.
AVLR
| $2.64M | 0.01% |
393
+229
| +140% | +$18.5K |
|
1113
CALL
Akamai
AKAM
$16.8B
| $2.64M | 0.01% |
289
-29
| -9% | -$2.52K |
|
1114
PUT
Ford
F
$57.3B
| $2.64M | 0.01% |
2,881
-807
| -22% | -$7.67K |
|
1115
PUT
Ligand Pharmaceuticals
LGND
$6.02B
| $2.64M | 0.01% |
425
+375
| +750% | +$23.5K |
|
|
SAGE
1116
PUT
DELISTED
Sage Therapeutics
SAGE
| $2.64M | 0.01% |
188
-66
| -26% | -$11K |
|
1117
CALL
TAL Education Group
TAL
$5.71B
| $2.64M | 0.01% |
770
+621
| +417% | +$21.6K |
|
1118
PUT
VF Corp
VFC
$6.68B
| $2.63M | 0.01% |
298
+222
| +292% | +$19K |
|
1119
CALL
Deutsche Bank
DB
$66.3B
| $2.63M | 0.01% |
3,511
+884
| +34% | +$6.73K |
|
|
VIAB
1120
CALL
DELISTED
Viacom Inc. Class B
VIAB
| $2.63M | 0.01% |
1,095
+111
| +11% | +$3.1K |
|
1121
CALL
Intercontinental Exchange
ICE
$82.4B
| $2.63M | 0.01% |
285
+105
| +58% | +$9.59K |
|
1122
CALL
Scotiabank
BNS
$106B
| $2.63M | 0.01% |
462
+165
| +56% | +$8.86K |
|
1123
PUT
HP
HPQ
$23.5B
| $2.62M | 0.01% |
1,387
+1,230
| +783% | +$24.2K |
|
|
GBT
1124
CALL
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $2.62M | 0.01% |
540
+160
| +42% | +$8.34K |
|
1125
CALL
Burlington
BURL
$22B
| $2.62M | 0.01% |
131
+48
| +58% | +$8.83K |
|
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.