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 | |
|---|---|---|---|---|---|---|
|
OPTU
1726
CALL
Optimum Communications Inc
OPTU
$316M
| $1.25M | ﹤0.01% |
436
+397
| +1,018% | +$10.8K |
|
1727
CALL
Idexx Laboratories
IDXX
$42.9B
| $1.25M | ﹤0.01% |
46
+30
| +188% | +$8.35K |
|
|
KYNB
1728
PUT
Kyntra Bio
KYNB
$28.5M
| $1.25M | ﹤0.01% |
14
-4
| -22% | -$4.39K |
|
|
FL
1729
DELISTED
Foot Locker
FL
| $1.25M | ﹤0.01% |
28,957
+2,595
| +10% | +$104K |
|
|
AVYA
1730
PUT
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $1.25M | ﹤0.01% |
1,220
-909
| -43% | -$10.7K |
|
|
ZAYO
1731
CALL
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $1.25M | ﹤0.01% |
368
-725
| -66% | -$24.4K |
|
1732
PUT
ING
ING
$93.8B
| $1.25M | ﹤0.01% |
1,193
-2,140
| -64% | -$22.5K |
|
1733
PUT
Monolithic Power Systems
MPWR
$65.5B
| $1.25M | ﹤0.01% |
80
+47
| +142% | +$7.03K |
|
1734
CALL
Philips
PHG
$25.4B
| $1.25M | ﹤0.01% |
340
+81
| +31% | +$2.98K |
|
1735
PUT
Adient
ADNT
$1.6B
| $1.24M | ﹤0.01% |
542
+230
| +74% | +$5.24K |
|
1736
CALL
Mattel
MAT
$4.17B
| $1.24M | ﹤0.01% |
1,092
+303
| +38% | +$3.47K |
|
1737
CALL
VanEck Durable High Dividend ETF
DURA
$38.7M
| $1.24M | ﹤0.01% |
396
+385
| +3,500% | +$10.8K |
|
1738
PUT
LendingTree
TREE
$544M
| $1.24M | ﹤0.01% |
40
+10
| +33% | +$3.41K |
|
1739
CALL
Itaú Unibanco
ITUB
$91.3B
| $1.24M | ﹤0.01% |
2,027
-2,059
| -50% | -$13.4K |
|
1740
PUT
Synchrony
SYF
$23.7B
| $1.24M | ﹤0.01% |
364
-39
| -10% | -$1.34K |
|
1741
Teva Pharmaceuticals
TEVA
$35.9B
| $1.24M | ﹤0.01% |
180,136
+39,344
| +28% | +$301K |
|
|
POLY
1742
CALL
DELISTED
Plantronics, Inc.
POLY
| $1.24M | ﹤0.01% |
332
+282
| +564% | +$9.59K |
|
1743
PUT
Allstate
ALL
$66.9B
| $1.24M | ﹤0.01% |
114
-293
| -72% | -$30.6K |
|
1744
CALL
Chemours
CC
$2.59B
| $1.24M | ﹤0.01% |
828
+359
| +77% | +$5.84K |
|
1745
Illumina
ILMN
$29.4B
| $1.24M | ﹤0.01% |
4,176
+3,198
| +327% | +$943K |
|
1746
PUT
Entergy
ETR
$54.1B
| $1.23M | ﹤0.01% |
210
-68
| -24% | -$3.72K |
|
1747
Liberty Global Class A
LBTYA
$3.31B
| $1.23M | ﹤0.01% |
49,762
+8,343
| +20% | +$223K |
|
1748
PUT
Cal-Maine
CALM
$4.28B
| $1.23M | ﹤0.01% |
308
+299
| +3,322% | +$12.4K |
|
1749
CALL
Darden Restaurants
DRI
$22.5B
| $1.23M | ﹤0.01% |
104
-32
| -24% | -$3.9K |
|
1750
PUT
PBF Energy
PBF
$7.29B
| $1.23M | ﹤0.01% |
452
+418
| +1,229% | +$10.7K |
|
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.