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 | |
|---|---|---|---|---|---|---|
|
MAXR
2751
CALL
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $440K | ﹤0.01% |
579
+511
| +751% | +$4.05K |
|
|
DHC
2752
CALL
Diversified Healthcare Trust
DHC
$2.28B
| $439K | ﹤0.01% |
475
+376
| +380% | +$3.24K |
|
2753
Madison Square Garden
MSGS
$9.57B
| $439K | ﹤0.01% |
+2,340
| New | +$459K |
|
2754
Bilibili
BILI
$7.47B
| $438K | ﹤0.01% |
31,040
-26,811
| -46% | -$403K |
|
2755
CALL
Healthpeak Properties
DOC
$15.5B
| $438K | ﹤0.01% |
123
+5
| +4% | +$169 |
|
2756
PUT
BJs Wholesale Club
BJ
$12.1B
| $437K | ﹤0.01% |
169
+27
| +19% | +$672 |
|
2757
Huntington Bancshares
HBAN
$34.7B
| $437K | ﹤0.01% |
30,633
-1,369
| -4% | -$18.7K |
|
2758
CALL
Intellia Therapeutics
NTLA
$1.49B
| $437K | ﹤0.01% |
328
-19
| -5% | -$303 |
|
2759
PUT
Astec Industries
ASTE
$1.29B
| $435K | ﹤0.01% |
140
+80
| +133% | +$2.44K |
|
2760
British American Tobacco
BTI
$131B
| $435K | ﹤0.01% |
11,809
-3,520
| -23% | -$129K |
|
|
CPRX
2761
DELISTED
Catalyst Pharmaceutical
CPRX
| $435K | ﹤0.01% |
81,952
+68,798
| +523% | +$367K |
|
2762
PUT
Safety Insurance
SAFT
$1.51B
| $435K | ﹤0.01% |
43
-208
| -83% | -$20.3K |
|
|
AMRS
2763
DELISTED
Amyris Inc.
AMRS
| $435K | ﹤0.01% |
91,535
+32,354
| +55% | +$121K |
|
2764
Helmerich & Payne
HP
$3.36B
| $433K | ﹤0.01% |
10,818
+10,346
| +2,192% | +$456K |
|
2765
CALL
Pampa Energía
PAM
$4.61B
| $432K | ﹤0.01% |
249
+212
| +573% | +$5.02K |
|
|
CIR
2766
PUT
DELISTED
CIRCOR International, Inc
CIR
| $431K | ﹤0.01% |
115
+74
| +180% | +$2.81K |
|
2767
CALL
Box
BOX
$4.18B
| $430K | ﹤0.01% |
260
-205
| -44% | -$3.29K |
|
|
2768
Box
BOX
$4.18B
| $430K | ﹤0.01% |
25,993
+12,246
| +89% | +$197K |
|
2769
AutoZone
AZO
$50.2B
| $429K | ﹤0.01% |
396
-1,580
| -80% | -$1.77M |
|
2770
CALL
Murphy Oil
MUR
$5.38B
| $428K | ﹤0.01% |
194
-275
| -59% | -$5.91K |
|
2771
CALL
Icon
ICLR
$13B
| $427K | ﹤0.01% |
29
-2
| -6% | -$307 |
|
|
QVCGA
2772
CALL
DELISTED
QVC Group Inc Series A
QVCGA
| $427K | ﹤0.01% |
9
-14
| -61% | -$8.22K |
|
|
HEP
2773
PUT
DELISTED
Holly Energy Partners, L.P.
HEP
| $427K | ﹤0.01% |
169
-157
| -48% | -$4.31K |
|
|
CSII
2774
DELISTED
Cardiovascular Systems, Inc.
CSII
| $427K | ﹤0.01% |
+8,987
| New | +$422K |
|
|
AMWD
2775
PUT
DELISTED
American Woodmark
AMWD
| $426K | ﹤0.01% |
48
+26
| +118% | +$2.15K |
|
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.