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 | |
|---|---|---|---|---|---|---|
2851
PTC Therapeutics
PTCT
$6.37B
| $393K | ﹤0.01% |
+8,816
| New | +$444K |
|
2852
CALL
Schwab US Broad Market ETF
SCHB
$42.8B
| $393K | ﹤0.01% |
570
+366
| +179% | +$4.43K |
|
2853
Rio Tinto
RIO
$148B
| $392K | ﹤0.01% |
+8,608
| New | +$442K |
|
2854
PUT
Sinclair Inc
SBGI
$974M
| $392K | ﹤0.01% |
244
-185
| -43% | -$4.81K |
|
2855
PUT
Valmont Industries
VMI
$9.44B
| $392K | ﹤0.01% |
37
+20
| +118% | +$2.59K |
|
2856
American Eagle Outfitters
AEO
$2.85B
| $391K | ﹤0.01% |
+49,205
| New | +$625K |
|
2857
CALL
Old Republic International
ORI
$10.3B
| $391K | ﹤0.01% |
257
+136
| +112% | +$2.8K |
|
2858
CALL
Webster Financial
WBS
$12.3B
| $391K | ﹤0.01% |
171
+65
| +61% | +$2.64K |
|
2859
CALL
Avantor
AVTR
$7.81B
| $390K | ﹤0.01% |
313
+139
| +80% | +$2.23K |
|
2860
CALL
Vanguard Total Bond Market
BND
$157B
| $390K | ﹤0.01% |
45
+18
| +67% | +$1.53K |
|
2861
iShares MSCI France ETF
EWQ
$324M
| $390K | ﹤0.01% |
16,651
+15,714
| +1,677% | +$460K |
|
2862
PUT
Gaming and Leisure Properties
GLPI
$12.8B
| $390K | ﹤0.01% |
141
+129
| +1,075% | +$5.29K |
|
|
TGNA
2863
PUT
DELISTED
TEGNA Inc
TGNA
| $390K | ﹤0.01% |
360
+46
| +15% | +$736 |
|
|
SILK
2864
PUT
DELISTED
Silk Road Medical, Inc. Common Stock
SILK
| $390K | ﹤0.01% |
124
+104
| +520% | +$4.16K |
|
2865
CALL
Chemed
CHE
$6.78B
| $389K | ﹤0.01% |
9
+5
| +125% | +$2.23K |
|
2866
PUT
Ericsson
ERIC
$30.7B
| $389K | ﹤0.01% |
481
+429
| +825% | +$3.51K |
|
|
KYNB
2867
CALL
Kyntra Bio
KYNB
$28.5M
| $389K | ﹤0.01% |
4
-8
| -67% | -$7.95K |
|
|
HUYA
2868
CALL
Huya Inc
HUYA
$542M
| $389K | ﹤0.01% |
230
-10
| -4% | -$186 |
|
2869
PUT
Prudential
PUK
$36.5B
| $389K | ﹤0.01% |
162
+157
| +3,140% | +$5K |
|
|
CTLT
2870
CALL
DELISTED
CATALENT, INC.
CTLT
| $389K | ﹤0.01% |
75
-122
| -62% | -$6.66K |
|
2871
PUT
BCE
BCE
$19.9B
| $388K | ﹤0.01% |
95
+35
| +58% | +$1.57K |
|
2872
PUT
Kornit Digital
KRNT
$706M
| $388K | ﹤0.01% |
156
+2
| +1% | +$75 |
|
|
DCP
2873
DELISTED
DCP Midstream, LP
DCP
| $388K | ﹤0.01% |
95,397
+42,456
| +80% | +$707K |
|
2874
CALL
Clearwater Paper
CLW
$271M
| $386K | ﹤0.01% |
177
+79
| +81% | +$1.9K |
|
|
RST
2875
PUT
DELISTED
ROSETTA STONE INC
RST
| $386K | ﹤0.01% |
276
-14
| -5% | -$235 |
|
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.