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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
276
PUT
Fidelity National Information Services
FIS
$21B
| $19.8M | 0.04% |
1,424
+370
| +35% | +$49.6K |
|
277
PUT
Zoetis
ZTS
$31.1B
| $19.6M | 0.04% |
1,482
+769
| +108% | +$95.6K |
|
278
PUT
Pfizer
PFE
$141B
| $19.5M | 0.04% |
5,252
-1,782
| -25% | -$63.5K |
|
279
PUT
Marathon Petroleum
MPC
$92.2B
| $19.5M | 0.04% |
3,240
-2,210
| -41% | -$138K |
|
280
CALL
SLB Ltd
SLB
$71.3B
| $19.5M | 0.04% |
4,848
+2,530
| +109% | +$90.3K |
|
|
AMRN
281
CALL
Amarin Corp
AMRN
$287M
| $19.4M | 0.04% |
452
+161
| +55% | +$61.1K |
|
282
PUT
Trade Desk
TTD
$8.26B
| $19.2M | 0.04% |
7,400
+1,480
| +25% | +$33.3K |
|
283
CALL
Peloton Interactive
PTON
$2.71B
| $19.2M | 0.04% |
+6,758
| New | +$182K |
|
284
PUT
Corpay
CPAY
$23.5B
| $19.2M | 0.04% |
667
+183
| +38% | +$54K |
|
285
CALL
Amgen
AMGN
$198B
| $19.2M | 0.04% |
796
-204
| -20% | -$45K |
|
286
PUT
Verizon
VZ
$185B
| $19.1M | 0.04% |
3,115
+1,099
| +55% | +$66.3K |
|
287
PUT
Bank of America
BAC
$432B
| $19.1M | 0.04% |
5,428
-103
| -2% | -$3.33K |
|
288
PUT
United Airlines
UAL
$38.1B
| $19.1M | 0.04% |
2,169
-1,507
| -41% | -$135K |
|
289
PUT
Coca-Cola
KO
$354B
| $19.1M | 0.04% |
3,446
-664
| -16% | -$35.7K |
|
290
CALL
Altria Group
MO
$121B
| $19M | 0.04% |
3,801
-566
| -13% | -$26.7K |
|
291
PUT
Burlington
BURL
$22.3B
| $18.9M | 0.04% |
830
+568
| +217% | +$119K |
|
292
PUT
Okta
OKTA
$23.8B
| $18.9M | 0.04% |
1,638
+737
| +82% | +$84.9K |
|
|
JJT
293
PUT
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $18.7M | 0.04% |
12,230
+8,153
| +200% | +$351K |
|
294
PUT
NextEra Energy
NEE
$186B
| $18.6M | 0.04% |
3,068
+308
| +11% | +$18K |
|
295
CALL
GE Aerospace
GE
$354B
| $18.6M | 0.04% |
3,338
+628
| +23% | +$32.4K |
|
296
CALL
Medtronic
MDT
$105B
| $18.5M | 0.04% |
1,632
-1,871
| -53% | -$205K |
|
|
297
CALL
Verizon
VZ
$185B
| $18.4M | 0.04% |
2,996
-3,435
| -53% | -$207K |
|
298
PUT
Motorola Solutions
MSI
$67.1B
| $18.3M | 0.04% |
1,138
+718
| +171% | +$118K |
|
299
Beyond Meat
BYND
$307M
| $18.3M | 0.04% |
+242,178
| New | +$22.5M |
|
|
VMW
300
PUT
DELISTED
VMware, Inc
VMW
| $18.3M | 0.04% |
1,206
-132
| -10% | -$20.7K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.