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 | |
|---|---|---|---|---|---|---|
|
EMBJ
1551
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $1.54M | ﹤0.01% |
892
+40
| +5% | +$763 |
|
|
SFIX
1552
CALL
Stitch Fix
SFIX
$478M
| $1.54M | ﹤0.01% |
798
+25
| +3% | +$581 |
|
1553
PUT
Logitech
LOGI
$15.2B
| $1.53M | ﹤0.01% |
377
+262
| +228% | +$10.5K |
|
1554
CALL
Voya Financial
VOYA
$8.94B
| $1.53M | ﹤0.01% |
282
+210
| +292% | +$11.2K |
|
1555
CALL
Bio-Rad Laboratories Class A
BIO
$8.42B
| $1.53M | ﹤0.01% |
46
-62
| -57% | -$20.2K |
|
1556
CALL
Chegg
CHGG
$108M
| $1.53M | ﹤0.01% |
511
+78
| +18% | +$3.09K |
|
1557
CALL
Ollie's Bargain Outlet
OLLI
$4.01B
| $1.53M | ﹤0.01% |
261
-54
| -17% | -$4.05K |
|
1558
CONMED
CNMD
$1.29B
| $1.53M | ﹤0.01% |
15,908
+15,781
| +12,426% | +$1.48M |
|
|
BZUN
1559
CALL
Baozun
BZUN
$144M
| $1.53M | ﹤0.01% |
358
-197
| -35% | -$9.36K |
|
1560
Edgewell Personal Care
EPC
$1.27B
| $1.53M | ﹤0.01% |
47,019
+39,699
| +542% | +$1.19M |
|
|
XIFR
1561
CALL
XPLR Infrastructure LP
XIFR
$1.18B
| $1.53M | ﹤0.01% |
289
-61
| -17% | -$3.07K |
|
1562
Universal Insurance Holdings
UVE
$1.16B
| $1.53M | ﹤0.01% |
50,899
+50,757
| +35,744% | +$1.39M |
|
1563
CALL
Ventas
VTR
$48.9B
| $1.53M | ﹤0.01% |
209
-83
| -28% | -$5.89K |
|
1564
CALL
Nexstar Media Group
NXST
$5.6B
| $1.52M | ﹤0.01% |
149
+52
| +54% | +$5.26K |
|
1565
CALL
SAP
SAP
$187B
| $1.52M | ﹤0.01% |
129
-5
| -4% | -$619 |
|
1566
CALL
Alaska Air
ALK
$5.15B
| $1.52M | ﹤0.01% |
234
-291
| -55% | -$18.3K |
|
1567
CALL
Xcel Energy
XEL
$51B
| $1.52M | ﹤0.01% |
234
+166
| +244% | +$10.3K |
|
1568
PUT
Paychex
PAYX
$40.4B
| $1.51M | ﹤0.01% |
183
-16
| -8% | -$1.33K |
|
1569
PUT
EPAM Systems
EPAM
$4.69B
| $1.51M | ﹤0.01% |
83
-193
| -70% | -$36.3K |
|
1570
Williams Companies
WMB
$90.5B
| $1.51M | ﹤0.01% |
+62,900
| New | +$1.59M |
|
1571
CALL
ACI Worldwide
ACIW
$5.72B
| $1.51M | ﹤0.01% |
483
+386
| +398% | +$12.2K |
|
1572
PUT
Fluor
FLR
$7.29B
| $1.51M | ﹤0.01% |
790
-40
| -5% | -$955 |
|
1573
CALL
Trex
TREX
$4.51B
| $1.51M | ﹤0.01% |
332
+14
| +4% | +$565 |
|
|
AXDX
1574
CALL
DELISTED
Accelerate Diagnostics
AXDX
| $1.51M | ﹤0.01% |
81
+32
| +65% | +$6.18K |
|
1575
CALL
FirstEnergy
FE
$28.9B
| $1.5M | ﹤0.01% |
312
+67
| +27% | +$3.03K |
|
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.