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 | |
|---|---|---|---|---|---|---|
201
PUT
Altria Group
MO
$122B
| $25.2M | 0.07% |
6,152
-2,050
| -25% | -$94.3K |
|
202
CALL
JD.com
JD
$40.8B
| $24.9M | 0.07% |
8,819
-514
| -6% | -$15.5K |
|
203
PUT
Align Technology
ALGN
$12.5B
| $24.8M | 0.07% |
1,373
+265
| +24% | +$55.1K |
|
|
TIF
204
PUT
DELISTED
Tiffany & Co.
TIF
| $24.7M | 0.07% |
2,662
+10
| +0.4% | +$903 |
|
205
CALL
General Dynamics
GD
$101B
| $24.6M | 0.07% |
1,348
+861
| +177% | +$160K |
|
206
CALL
Pfizer
PFE
$142B
| $24.6M | 0.07% |
7,223
+3,797
| +111% | +$138K |
|
207
CALL
Proshares UltraShort Technology
REW
$3.27M
| $24.4M | 0.07% |
115
+1
| +0.9% | +$1.09K |
|
208
PUT
Gilead Sciences
GILD
$163B
| $24.4M | 0.07% |
3,855
+4
| +0.1% | +$261 |
|
|
SHNY
209
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $24M | 0.07% |
6,630
+597
| +10% | +$2.16M |
|
|
210
PUT
Pfizer
PFE
$142B
| $24M | 0.07% |
7,034
+386
| +6% | +$14K |
|
211
PUT
Autodesk
ADSK
$43.2B
| $23.9M | 0.07% |
1,617
+377
| +30% | +$58.7K |
|
|
AGN
212
PUT
DELISTED
Allergan plc
AGN
| $23.8M | 0.07% |
1,413
-2,663
| -65% | -$434K |
|
213
PUT
Twilio
TWLO
$28B
| $23.3M | 0.07% |
2,118
-181
| -8% | -$23.5K |
|
214
PUT
Abbott
ABT
$175B
| $23M | 0.07% |
2,749
+1,393
| +103% | +$118K |
|
215
CALL
General Motors
GM
$74.8B
| $23M | 0.07% |
6,126
+2,366
| +63% | +$91K |
|
216
PUT
American Tower
AMT
$77.2B
| $22.9M | 0.07% |
1,035
-1,215
| -54% | -$265K |
|
217
CALL
lululemon athletica
LULU
$12.9B
| $22.9M | 0.07% |
1,187
+543
| +84% | +$101K |
|
|
218
Netflix
NFLX
$292B
| $22.5M | 0.06% |
842,480
-607,790
| -42% | -$19M |
|
219
CALL
Philip Morris
PM
$303B
| $22.4M | 0.06% |
2,947
+175
| +6% | +$13.9K |
|
220
PUT
Coca-Cola
KO
$355B
| $22.4M | 0.06% |
4,110
+1,273
| +45% | +$68.2K |
|
|
RDS.A
221
CALL
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $22.1M | 0.06% |
3,732
+963
| +35% | +$57.2K |
|
222
CALL
Procter & Gamble
PG
$350B
| $22M | 0.06% |
1,772
-416
| -19% | -$49.2K |
|
|
223
CALL
Align Technology
ALGN
$12.5B
| $21.8M | 0.06% |
1,205
+146
| +14% | +$30.4K |
|
224
PUT
Union Pacific
UNP
$174B
| $21.8M | 0.06% |
1,344
-1,227
| -48% | -$206K |
|
|
RTN
225
PUT
DELISTED
Raytheon Company
RTN
| $21.7M | 0.06% |
1,106
+327
| +42% | +$60.6K |
|
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.