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 |
Apple
AAPL
|
+$179M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$90.1M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$56M |
| 4 |
iShares Silver Trust
SLV
|
+$41.7M |
| 5 |
Advanced Micro Devices
AMD
|
+$39.8M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.8M |
| 2 |
Verizon
VZ
|
+$42.5M |
| 3 |
Occidental Petroleum
OXY
|
+$34.7M |
| 4 |
iShares China Large-Cap ETF
FXI
|
+$33M |
| 5 |
Direxion Daily S&P 500 Bull 3x ETF
SPXL
|
+$32.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.67% |
| 2 | Consumer Discretionary | 0.37% |
| 3 | Industrials | 0.24% |
| 4 | Healthcare | 0.22% |
| 5 | Financials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2601
VanEck Agribusiness ETF
MOO
$989M
| $1.28M | ﹤0.01% |
12,285
+11,900
| +3,091% | +$1.15M |
|
2602
CALL
Cinemark Holdings
CNK
$3.82B
| $1.28M | ﹤0.01% |
74,300
-70,100
| -49% | -$1.17M |
|
2603
Corsair Gaming
CRSR
$1.05B
| $1.28M | ﹤0.01% |
+60,648
| New | +$1.26M |
|
|
NXDR
2604
PUT
Nextdoor Holdings
NXDR
$835M
| $1.28M | ﹤0.01% |
214,300
+147,400
| +220% | +$897K |
|
2605
CALL
Paycom
PAYC
$6.78B
| $1.28M | ﹤0.01% |
3,700
-17,600
| -83% | -$5.9M |
|
|
RUTH
2606
CALL
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $1.28M | ﹤0.01% |
56,000
-9,000
| -14% | -$194K |
|
2607
CALL
BJs Wholesale Club
BJ
$11.9B
| $1.28M | ﹤0.01% |
18,900
-7,300
| -28% | -$458K |
|
2608
PUT
Mid-America Apartment Communities
MAA
$15.6B
| $1.28M | ﹤0.01% |
6,100
+4,600
| +307% | +$964K |
|
2609
PUT
Allot
ALLT
$374M
| $1.28M | ﹤0.01% |
157,600
+134,700
| +588% | +$1.23M |
|
|
JOBS
2610
PUT
DELISTED
51job Inc
JOBS
| $1.28M | ﹤0.01% |
21,800
+16,500
| +311% | +$845K |
|
2611
CALL
PetMed Express
PETS
$42.5M
| $1.27M | ﹤0.01% |
49,400
+2,900
| +6% | +$75.2K |
|
2612
Thor Industries
THO
$3.99B
| $1.27M | ﹤0.01% |
16,177
+11,903
| +278% | +$1.09M |
|
2613
PUT
MasTec
MTZ
$26.7B
| $1.27M | ﹤0.01% |
14,600
+1,500
| +11% | +$131K |
|
2614
CALL
BridgeBio Pharma
BBIO
$16.5B
| $1.27M | ﹤0.01% |
125,200
-80,400
| -39% | -$825K |
|
2615
CALL
KBR
KBR
$4.68B
| $1.27M | ﹤0.01% |
23,200
+19,900
| +603% | +$967K |
|
2616
PUT
STAG Industrial
STAG
$7.86B
| $1.27M | ﹤0.01% |
30,700
+26,000
| +553% | +$1.07M |
|
|
ME
2617
PUT
DELISTED
23andMe Holding Co
ME
| $1.27M | ﹤0.01% |
16,575
+9,885
| +148% | +$902K |
|
|
DCT
2618
CALL
DELISTED
Duck Creek Technologies, Inc. Common Stock
DCT
| $1.27M | ﹤0.01% |
57,400
+51,700
| +907% | +$1.24M |
|
|
IRBT
2619
CALL
DELISTED
iRobot
IRBT
| $1.27M | ﹤0.01% |
20,000
-200
| -1% | -$12.7K |
|
2620
PUT
AbCellera Biologics
ABCL
$1.62B
| $1.27M | ﹤0.01% |
129,900
+108,700
| +513% | +$1.03M |
|
2621
CALL
Vanguard Total Bond Market
BND
$157B
| $1.26M | ﹤0.01% |
16,100
-12,400
| -44% | -$1.01M |
|
2622
PUT
Workhorse Group
WKHS
$29.5M
| $1.26M | ﹤0.01% |
84
-61
| -42% | -$672K |
|
2623
CALL
Genuine Parts
GPC
$17.1B
| $1.26M | ﹤0.01% |
10,000
+500
| +5% | +$64.7K |
|
2624
CALL
Smith & Wesson
SWBI
$655M
| $1.26M | ﹤0.01% |
83,300
+41,000
| +97% | +$689K |
|
2625
PUT
TriNet
TNET
$2.84B
| $1.26M | ﹤0.01% |
12,800
+10,000
| +357% | +$884K |
|
Similar funds
Simplex Trading's Q1 2022 Portfolio in Review
As of Q1 2022, Simplex Trading held 12,038 positions worth $109B, up 10% from $99B the previous quarter. Its ten largest holdings account for 37% of the portfolio.
Simplex Trading deployed $17.5B of net new capital in Q1 2022, opening 1,603 new positions and adding to 4,441 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 652,921 shares worth $86.2M.
By sector, the portfolio is most concentrated in Technology at 0.67% of assets, up from 0.61% a quarter earlier, followed by Consumer Discretionary and Industrials.
On the sell side, the largest reduction was Verizon, an estimated $42.5M trimmed.
- Simplex Trading's largest Q1 2022 buy was iShares 20+ Year Treasury Bond ETF: 652,921 shares worth $86.2M.
- Simplex Trading added most to Apple in Q1 2022, an estimated $179M increase.
- Simplex Trading's biggest Q1 2022 reduction was Verizon, cutting an estimated $42.5M.
- Simplex Trading fully exited State Street Financial Select Sector SPDR ETF in Q1 2022, selling an estimated $42.8M.
- Simplex Trading's ten largest holdings make up 37% of its $109B portfolio in Q1 2022.
- Simplex Trading opened 1,603 new positions and closed 1,637 in Q1 2022.
- Simplex Trading's portfolio value rose 10% quarter-over-quarter to $109B.
Based on Simplex Trading's 13F filing for Q1 2022, filed 2 May 2022.