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 | |
|---|---|---|---|---|---|---|
801
PUT
Baxter International
BAX
$11.1B
| $4.12M | 0.01% |
508
+325
| +178% | +$28K |
|
802
CALL
Axsome Therapeutics
AXSM
$12.5B
| $4.12M | 0.01% |
701
-351
| -33% | -$28.6K |
|
803
PUT
Viatris
VTRS
$19.7B
| $4.11M | 0.01% |
2,756
+745
| +37% | +$14.3K |
|
804
CALL
MSCI
MSCI
$40.6B
| $4.1M | 0.01% |
142
+48
| +51% | +$13.6K |
|
|
CS
805
PUT
DELISTED
Credit Suisse Group
CS
| $4.09M | 0.01% |
5,059
+2,899
| +134% | +$33.7K |
|
806
CoStar Group
CSGP
$11.1B
| $4.09M | 0.01% |
69,640
+46,840
| +205% | +$3.05M |
|
807
PUT
Fortinet
FTNT
$111B
| $4.09M | 0.01% |
2,020
-1,925
| -49% | -$41.3K |
|
808
PUT
Northern Trust
NTRS
$21.8B
| $4.07M | 0.01% |
540
+527
| +4,054% | +$48.3K |
|
|
PPLI
809
People Inc
PPLI
$3.15B
| $4.07M | 0.01% |
+126,960
| New | +$5.03M |
|
810
CALL
VeriSign
VRSN
$23.6B
| $4.05M | 0.01% |
225
+40
| +22% | +$7.87K |
|
811
CALL
Sarepta Therapeutics
SRPT
$1.68B
| $4.05M | 0.01% |
414
-809
| -66% | -$92.5K |
|
812
CALL
Hormel Foods
HRL
$13.7B
| $4.04M | 0.01% |
867
+112
| +15% | +$5.09K |
|
|
XLRN
813
PUT
DELISTED
Acceleron Pharma
XLRN
| $4.03M | 0.01% |
448
+277
| +162% | +$21.5K |
|
814
CALL
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.8M
| $4.02M | 0.01% |
334
-24
| -7% | -$2.97K |
|
815
PUT
AllianceBernstein
AB
$3.44B
| $4M | 0.01% |
2,152
+1,991
| +1,237% | +$58.8K |
|
816
CALL
MarketAxess Holdings
MKTX
$4.04B
| $3.99M | 0.01% |
120
+76
| +173% | +$26.5K |
|
817
CALL
Moderna
MRNA
$22.7B
| $3.98M | 0.01% |
1,330
+917
| +222% | +$21.1K |
|
818
Las Vegas Sands
LVS
$30.4B
| $3.98M | 0.01% |
93,654
+5,456
| +6% | +$330K |
|
819
PUT
Avis
CAR
$5.67B
| $3.98M | 0.01% |
2,860
+1,722
| +151% | +$51.5K |
|
820
CALL
TAL Education Group
TAL
$5.71B
| $3.97M | 0.01% |
746
+419
| +128% | +$22.5K |
|
|
PPLC
821
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $3.97M | 0.01% |
4,547
+1,706
| +60% | +$70.7K |
|
822
PUT
Marathon Petroleum
MPC
$91.8B
| $3.97M | 0.01% |
1,680
-1,560
| -48% | -$71.9K |
|
823
PUT
Lennar Class B
LEN.B
$19B
| $3.96M | 0.01% |
1,091
-1,298
| -54% | -$56.7K |
|
|
BNY
824
PUT
Bank of New York Mellon
BNY
$109B
| $3.95M | 0.01% |
1,172
+606
| +107% | +$25.4K |
|
825
CALL
Boston Scientific
BSX
$64.3B
| $3.94M | 0.01% |
1,206
-471
| -28% | -$18.4K |
|
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.