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 | |
|---|---|---|---|---|---|---|
1226
PUT
Enterprise Products Partners
EPD
$83.8B
| $2.31M | 0.01% |
807
+203
| +34% | +$5.91K |
|
1227
CALL
Vanguard High Dividend Yield ETF
VYM
$81.1B
| $2.31M | 0.01% |
260
-27
| -9% | -$2.36K |
|
1228
PUT
Sociedad Química y Minera de Chile
SQM
$19.6B
| $2.3M | 0.01% |
828
+339
| +69% | +$9.35K |
|
1229
CALL
PPG Industries
PPG
$25.9B
| $2.3M | 0.01% |
194
+147
| +313% | +$16.9K |
|
1230
CALL
NovoCure
NVCR
$2.04B
| $2.29M | 0.01% |
307
-81
| -21% | -$6.48K |
|
1231
PUT
Boston Properties
BXP
$11B
| $2.29M | 0.01% |
177
+117
| +195% | +$15.2K |
|
1232
Charter Communications
CHTR
$14.7B
| $2.29M | 0.01% |
5,559
+3,040
| +121% | +$1.23M |
|
1233
PUT
Deutsche Bank
DB
$66.3B
| $2.29M | 0.01% |
3,054
+1,348
| +79% | +$10.3K |
|
1234
CALL
Baker Hughes
BKR
$56.8B
| $2.29M | 0.01% |
987
-137
| -12% | -$3.21K |
|
1235
PUT
YPF
YPF
$20.2B
| $2.29M | 0.01% |
2,473
+450
| +22% | +$5.8K |
|
1236
CALL
Allison Transmission
ALSN
$10.1B
| $2.29M | 0.01% |
486
-248
| -34% | -$11.2K |
|
|
IRBT
1237
CALL
DELISTED
iRobot
IRBT
| $2.28M | 0.01% |
370
-36
| -9% | -$2.58K |
|
1238
CALL
Lear
LEA
$7.19B
| $2.27M | 0.01% |
193
+119
| +161% | +$14.5K |
|
1239
CALL
Kohl's
KSS
$2.03B
| $2.27M | 0.01% |
458
-305
| -40% | -$15K |
|
1240
PUT
TechnipFMC
FTI
$30.6B
| $2.27M | 0.01% |
1,265
+856
| +209% | +$16K |
|
1241
CALL
Mohawk Industries
MHK
$6.9B
| $2.27M | 0.01% |
183
+100
| +120% | +$12.8K |
|
|
WORK
1242
CALL
DELISTED
Slack Technologies, Inc.
WORK
| $2.27M | 0.01% |
955
+564
| +144% | +$17.1K |
|
1243
CALL
HF Sinclair
DINO
$15.9B
| $2.26M | 0.01% |
422
+185
| +78% | +$8.97K |
|
1244
AB InBev
BUD
$158B
| $2.26M | 0.01% |
23,767
+12,025
| +102% | +$1.14M |
|
1245
PUT
DXC Technology
DXC
$1.63B
| $2.25M | 0.01% |
764
+386
| +102% | +$16.4K |
|
|
RP
1246
CALL
DELISTED
RealPage, Inc.
RP
| $2.25M | 0.01% |
358
-38
| -10% | -$2.38K |
|
1247
CALL
Cameco
CCJ
$38.3B
| $2.25M | 0.01% |
2,365
+2,143
| +965% | +$20.1K |
|
1248
CALL
Air Products & Chemicals
APD
$66.3B
| $2.24M | 0.01% |
101
-125
| -55% | -$28.1K |
|
1249
CALL
Snap-on
SNA
$20.9B
| $2.24M | 0.01% |
143
-94
| -40% | -$14.4K |
|
|
SIX
1250
CALL
DELISTED
Six Flags Entertainment Corp.
SIX
| $2.23M | 0.01% |
440
+285
| +184% | +$15.5K |
|
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.