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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SPLK
326
PUT
DELISTED
Splunk Inc
SPLK
| $13.1M | 0.02% |
1,039
-181
| -15% | -$26.6K |
|
327
PUT
ASML
ASML
$692B
| $13.1M | 0.02% |
499
-35
| -7% | -$9.96K |
|
|
AGN
328
PUT
DELISTED
Allergan plc
AGN
| $13M | 0.02% |
735
-702
| -49% | -$132K |
|
329
Comcast
CMCSA
$85B
| $13M | 0.02% |
378,013
+337,614
| +836% | +$14.2M |
|
330
PUT
Kraft Heinz
KHC
$30.9B
| $12.9M | 0.02% |
5,222
+2,656
| +104% | +$72.9K |
|
331
PUT
United Rentals
URI
$64.7B
| $12.9M | 0.02% |
1,254
-1,886
| -60% | -$250K |
|
332
CALL
Okta
OKTA
$23.9B
| $12.8M | 0.02% |
1,049
+2
| +0.2% | +$251 |
|
333
PUT
AB InBev
BUD
$161B
| $12.8M | 0.02% |
2,899
-671
| -19% | -$43.8K |
|
|
VMW
334
PUT
DELISTED
VMware, Inc
VMW
| $12.7M | 0.02% |
1,049
-157
| -13% | -$21.6K |
|
335
PUT
BP
BP
$112B
| $12.7M | 0.02% |
5,201
+2,713
| +109% | +$87.7K |
|
336
CALL
Cigna
CI
$76.6B
| $12.7M | 0.02% |
+715
| New | +$139K |
|
337
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$247M
| $12.6M | 0.02% |
6,078
+351
| +6% | +$16K |
|
338
CALL
RH
RH
$3.35B
| $12.6M | 0.02% |
1,257
-45
| -3% | -$8.39K |
|
339
CALL
General Mills
GIS
$19.8B
| $12.4M | 0.02% |
2,357
+1,149
| +95% | +$60.7K |
|
|
B
340
CALL
Barrick Mining
B
$62.7B
| $12.4M | 0.02% |
6,787
+803
| +13% | +$15.1K |
|
341
CALL
Autodesk
ADSK
$43.1B
| $12.4M | 0.02% |
795
-1,775
| -69% | -$326K |
|
342
CALL
Teva Pharmaceuticals
TEVA
$35.6B
| $12.4M | 0.02% |
13,778
+5,157
| +60% | +$52.8K |
|
|
CTXS
343
CALL
DELISTED
Citrix Systems Inc
CTXS
| $12.3M | 0.02% |
870
-123
| -12% | -$14.7K |
|
344
PUT
Proshares UltraShort Technology
REW
$3.27M
| $12.3M | 0.02% |
97
+83
| +593% | +$64.7K |
|
345
PUT
Occidental Petroleum
OXY
$57.1B
| $12.2M | 0.02% |
+10,564
| New | +$347K |
|
346
CALL
Western Digital
WDC
$193B
| $12.2M | 0.02% |
3,888
-2,776
| -42% | -$123K |
|
347
PUT
eBay
EBAY
$49.9B
| $12.2M | 0.02% |
4,043
+1,396
| +53% | +$48.6K |
|
348
Gilead Sciences
GILD
$163B
| $12M | 0.02% |
160,971
+23,574
| +17% | +$1.63M |
|
349
CALL
Southern Company
SO
$107B
| $12M | 0.02% |
2,213
+1,450
| +190% | +$91.9K |
|
|
AGN
350
DELISTED
Allergan plc
AGN
| $12M | 0.02% |
+67,641
| New | +$12.7M |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.