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 | |
|---|---|---|---|---|---|---|
2376
Devon Energy
DVN
$51.9B
| $615K | ﹤0.01% |
89,108
+84,508
| +1,837% | +$1.53M |
|
2377
CALL
Teleflex
TFX
$5.85B
| $615K | ﹤0.01% |
21
+19
| +950% | +$6.63K |
|
2378
CALL
Allegiant Air
ALGT
$2.64B
| $613K | ﹤0.01% |
75
-394
| -84% | -$56.6K |
|
|
EMBJ
2379
CALL
Embraer S.A. ADS
EMBJ
$11.6B
| $613K | ﹤0.01% |
829
+716
| +634% | +$10.8K |
|
2380
Heron Therapeutics
HRTX
$86.3M
| $613K | ﹤0.01% |
52,255
+39,204
| +300% | +$737K |
|
2381
PUT
Insulet
PODD
$11.3B
| $613K | ﹤0.01% |
37
+15
| +68% | +$2.74K |
|
2382
PUT
Rogers Corp
ROG
$2.33B
| $613K | ﹤0.01% |
65
+64
| +6,400% | +$7.28K |
|
|
PE
2383
PUT
DELISTED
PARSLEY ENERGY INC
PE
| $613K | ﹤0.01% |
1,072
+756
| +239% | +$10.2K |
|
2384
CALL
Blackstone Mortgage Trust
BXMT
$2.82B
| $612K | ﹤0.01% |
329
+328
| +32,800% | +$11.1K |
|
2385
PUT
Merit Medical Systems
MMSI
$4.43B
| $612K | ﹤0.01% |
196
-535
| -73% | -$19.1K |
|
2386
Dentsply Sirona
XRAY
$2.59B
| $612K | ﹤0.01% |
15,762
+9,198
| +140% | +$469K |
|
2387
PUT
AnaptysBio
ANAB
$1.6B
| $611K | ﹤0.01% |
433
-253
| -37% | -$3.84K |
|
2388
eBay
EBAY
$48.6B
| $610K | ﹤0.01% |
20,321
-45,581
| -69% | -$1.59M |
|
2389
Vanguard High Dividend Yield ETF
VYM
$81.1B
| $610K | ﹤0.01% |
+8,622
| New | +$741K |
|
|
PDCO
2390
CALL
DELISTED
Patterson Companies, Inc.
PDCO
| $610K | ﹤0.01% |
399
+156
| +64% | +$3.37K |
|
2391
CALL
Deluxe
DLX
$1.19B
| $609K | ﹤0.01% |
235
+85
| +57% | +$3.28K |
|
2392
PUT
Banco Bradesco
BBD
$38.1B
| $608K | ﹤0.01% |
1,994
-310
| -13% | -$1.59K |
|
2393
Wolfspeed
WOLF
$1.2B
| $608K | ﹤0.01% |
17,154
+8,708
| +103% | +$391K |
|
|
ALBO
2394
CALL
DELISTED
Albireo Pharma Inc
ALBO
| $608K | ﹤0.01% |
372
+332
| +830% | +$7.3K |
|
2395
Automatic Data Processing
ADP
$100B
| $607K | ﹤0.01% |
+4,448
| New | +$717K |
|
2396
Fox Class A
FOXA
$23.2B
| $606K | ﹤0.01% |
25,676
+17,967
| +233% | +$591K |
|
2397
Flowers Foods
FLO
$1.64B
| $604K | ﹤0.01% |
29,483
+29,398
| +34,586% | +$641K |
|
2398
PUT
Olin
OLN
$2.64B
| $604K | ﹤0.01% |
518
+316
| +156% | +$4.78K |
|
|
VISN
2399
CALL
Vistance Networks Inc
VISN
$2.66B
| $603K | ﹤0.01% |
663
+288
| +77% | +$3.34K |
|
2400
CALL
CoreCivic
CXW
$3.1B
| $602K | ﹤0.01% |
539
+275
| +104% | +$4.12K |
|
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.