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 | |
|---|---|---|---|---|---|---|
|
ICAD
2926
PUT
DELISTED
iCAD Inc
ICAD
| $367K | ﹤0.01% |
500
+296
| +145% | +$2.89K |
|
2927
PUT
A.O. Smith
AOS
$8.38B
| $366K | ﹤0.01% |
97
-16
| -14% | -$682 |
|
|
MRO
2928
DELISTED
Marathon Oil Corporation
MRO
| $366K | ﹤0.01% |
+111,448
| New | +$1.03M |
|
2929
Acadia Healthcare
ACHC
$3.17B
| $365K | ﹤0.01% |
19,913
+17,704
| +801% | +$507K |
|
2930
PUT
AGNC Investment
AGNC
$12.3B
| $365K | ﹤0.01% |
345
-403
| -54% | -$6.72K |
|
2931
Church & Dwight Co
CHD
$23.1B
| $365K | ﹤0.01% |
5,689
+3,884
| +215% | +$276K |
|
2932
CALL
Federal Realty Investment Trust
FRT
$10.9B
| $365K | ﹤0.01% |
49
+46
| +1,533% | +$5.29K |
|
2933
GoPro
GPRO
$116M
| $365K | ﹤0.01% |
+139,652
| New | +$519K |
|
2934
CALL
Atkore
ATKR
$2.59B
| $364K | ﹤0.01% |
173
-51
| -23% | -$1.83K |
|
|
EV
2935
CALL
DELISTED
Eaton Vance Corp.
EV
| $364K | ﹤0.01% |
113
-1
| -0.9% | -$42 |
|
2936
Sempra
SRE
$60.8B
| $363K | ﹤0.01% |
6,432
+404
| +7% | +$28.7K |
|
2937
Tenaris
TS
$29.1B
| $363K | ﹤0.01% |
+30,190
| New | +$555K |
|
2938
PUT
Newmark Group
NMRK
$2.73B
| $362K | ﹤0.01% |
852
+550
| +182% | +$5.39K |
|
2939
PUT
Pacira BioSciences
PCRX
$1.02B
| $362K | ﹤0.01% |
108
+97
| +882% | +$4.03K |
|
2940
Ubiquiti
UI
$31.8B
| $362K | ﹤0.01% |
2,563
-19,705
| -88% | -$3.01M |
|
|
SWN
2941
CALL
DELISTED
Southwestern Energy Company
SWN
| $362K | ﹤0.01% |
2,143
-746
| -26% | -$1.29K |
|
2942
PUT
Edison International
EIX
$30.7B
| $361K | ﹤0.01% |
66
-873
| -93% | -$60.5K |
|
2943
CALL
Sonoco
SON
$5.76B
| $361K | ﹤0.01% |
78
+6
| +8% | +$320 |
|
2944
PUT
Williams-Sonoma
WSM
$26.7B
| $361K | ﹤0.01% |
170
-320
| -65% | -$10.2K |
|
|
AXDX
2945
PUT
DELISTED
Accelerate Diagnostics
AXDX
| $360K | ﹤0.01% |
43
-20
| -32% | -$2.81K |
|
2946
CALL
Middlesex Water
MSEX
$1.05B
| $360K | ﹤0.01% |
60
-18
| -23% | -$1.14K |
|
2947
CALL
Tower Semiconductor
TSEM
$26.4B
| $359K | ﹤0.01% |
226
-1,539
| -87% | -$32K |
|
|
TVRD
2948
PUT
Tvardi Therapeutics
TVRD
$23.5M
| $359K | ﹤0.01% |
8
+1
| +14% | +$543 |
|
|
NVRO
2949
PUT
DELISTED
NEVRO CORP.
NVRO
| $359K | ﹤0.01% |
36
-329
| -90% | -$39.6K |
|
|
OPTU
2950
CALL
Optimum Communications Inc
OPTU
$316M
| $358K | ﹤0.01% |
161
-871
| -84% | -$22.7K |
|
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.