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 | |
|---|---|---|---|---|---|---|
|
CLR
1676
PUT
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $1.33M | ﹤0.01% |
432
-162
| -27% | -$5.48K |
|
1677
PUT
Dave & Buster's
PLAY
$343M
| $1.33M | ﹤0.01% |
341
+20
| +6% | +$806 |
|
1678
PUT
MSC Industrial Direct
MSM
$7.02B
| $1.33M | ﹤0.01% |
183
+118
| +182% | +$8.26K |
|
1679
CALL
Rithm Capital
RITM
$5.09B
| $1.32M | ﹤0.01% |
845
+585
| +225% | +$8.76K |
|
1680
CALL
Encompass Health
EHC
$11.2B
| $1.32M | ﹤0.01% |
263
+64
| +32% | +$3.21K |
|
1681
CALL
Semtech
SMTC
$11.7B
| $1.32M | ﹤0.01% |
272
-73
| -21% | -$3.46K |
|
|
DISCK
1682
CALL
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $1.32M | ﹤0.01% |
527
-115
| -18% | -$3.11K |
|
1683
CALL
Iovance Biotherapeutics
IOVA
$2.23B
| $1.32M | ﹤0.01% |
724
+414
| +134% | +$9.15K |
|
1684
PUT
Banco Santander
SAN
$194B
| $1.32M | ﹤0.01% |
3,419
-43
| -1% | -$171 |
|
|
ATSG
1685
PUT
DELISTED
Air Transport Services Group
ATSG
| $1.31M | ﹤0.01% |
626
+335
| +115% | +$7.31K |
|
1686
CALL
Entergy
ETR
$54.1B
| $1.31M | ﹤0.01% |
224
-116
| -34% | -$6.34K |
|
1687
PUT
Helmerich & Payne
HP
$3.53B
| $1.31M | ﹤0.01% |
328
+70
| +27% | +$3.09K |
|
1688
CALL
DexCom
DXCM
$27.6B
| $1.31M | ﹤0.01% |
352
+100
| +40% | +$3.88K |
|
1689
Regeneron Pharmaceuticals
REGN
$68.8B
| $1.31M | ﹤0.01% |
+4,730
| New | +$1.4M |
|
1690
VanEck Junior Gold Miners ETF
GDXJ
$7.06B
| $1.31M | ﹤0.01% |
+36,105
| New | +$1.4M |
|
|
HOLX
1691
CALL
DELISTED
Hologic
HOLX
| $1.31M | ﹤0.01% |
259
+104
| +67% | +$5.12K |
|
1692
iShares MSCI Japan ETF
EWJ
$21.7B
| $1.3M | ﹤0.01% |
23,002
+16,767
| +269% | +$919K |
|
1693
Galicia Financial Group
GGAL
$7.92B
| $1.3M | ﹤0.01% |
+100,203
| New | +$2.36M |
|
1694
Fluor
FLR
$7.29B
| $1.3M | ﹤0.01% |
67,957
+35,670
| +110% | +$852K |
|
1695
CALL
United Parks & Resorts
PRKS
$2.11B
| $1.3M | ﹤0.01% |
494
-865
| -64% | -$26.3K |
|
1696
CALL
Caesars Entertainment
CZR
$6.1B
| $1.29M | ﹤0.01% |
325
-122
| -27% | -$5.18K |
|
|
CLVS
1697
CALL
DELISTED
Clovis Oncology, Inc.
CLVS
| $1.29M | ﹤0.01% |
3,296
+2,157
| +189% | +$17.4K |
|
1698
PUT
Amphenol
APH
$188B
| $1.29M | ﹤0.01% |
536
-2,184
| -80% | -$50.3K |
|
1699
PUT
Wolfspeed
WOLF
$1.2B
| $1.29M | ﹤0.01% |
264
+105
| +66% | +$5.71K |
|
1700
PUT
PagSeguro Digital
PAGS
$2.57B
| $1.29M | ﹤0.01% |
279
+150
| +116% | +$6.97K |
|
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.