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 | |
|---|---|---|---|---|---|---|
3876
PUT
Entegris
ENTG
$18B
| $485K | ﹤0.01% |
3,700
+2,700
| +270% | +$347K |
|
3877
PUT
Kyndryl
KD
$2.94B
| $485K | ﹤0.01% |
37,000
+10,300
| +39% | +$155K |
|
3878
CALL
NNN REIT
NNN
$9.37B
| $485K | ﹤0.01% |
10,800
+8,900
| +468% | +$392K |
|
3879
PTC
PTC
$14.7B
| $485K | ﹤0.01% |
4,509
+2,095
| +87% | +$235K |
|
|
AVCT
3880
CALL
DELISTED
American Virtual Cloud Technologies, Inc. Common Stock
AVCT
| $485K | ﹤0.01% |
34,593
+23,913
| +224% | +$436K |
|
|
MESO
3881
CALL
Mesoblast
MESO
$1.87B
| $484K | ﹤0.01% |
57,400
+50,600
| +744% | +$430K |
|
|
JJT
3882
PUT
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $484K | ﹤0.01% |
10,600
+3,700
| +54% | +$478K |
|
3883
ProShares UltraPro Russell2000
URTY
$330M
| $483K | ﹤0.01% |
+6,419
| New | +$488K |
|
|
MRNS
3884
CALL
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $483K | ﹤0.01% |
51,700
+33,000
| +176% | +$328K |
|
3885
PUT
Bit Digital
BTBT
$459M
| $482K | ﹤0.01% |
134,100
+56,000
| +72% | +$235K |
|
3886
General Dynamics
GD
$106B
| $482K | ﹤0.01% |
+2,000
| New | +$444K |
|
3887
Ziff Davis
ZD
$1.95B
| $481K | ﹤0.01% |
+4,975
| New | +$510K |
|
|
WBX
3888
CALL
Wallbox
WBX
$83.5M
| $479K | ﹤0.01% |
1,880
-885
| -32% | -$235K |
|
3889
CALL
Tidewater
TDW
$3.71B
| $478K | ﹤0.01% |
+22,000
| New | +$348K |
|
3890
CALL
Atomera
ATOM
$187M
| $477K | ﹤0.01% |
36,600
+8,900
| +32% | +$133K |
|
3891
PUT
Gevo
GEVO
$363M
| $477K | ﹤0.01% |
102,000
-101,500
| -50% | -$388K |
|
3892
CALL
Planet Labs
PL
$7.28B
| $477K | ﹤0.01% |
93,900
+52,800
| +128% | +$291K |
|
|
TRTN
3893
CALL
DELISTED
Triton International Limited
TRTN
| $477K | ﹤0.01% |
6,800
-44,400
| -87% | -$2.87M |
|
|
MNRL
3894
CALL
DELISTED
Brigham Minerals, Inc. Class A Common Stock
MNRL
| $477K | ﹤0.01% |
18,700
-12,000
| -39% | -$278K |
|
3895
CALL
RLX Technology
RLX
$2.43B
| $476K | ﹤0.01% |
266,100
+16,800
| +7% | +$50K |
|
|
PTRA
3896
DELISTED
Proterra Inc. Common Stock
PTRA
| $476K | ﹤0.01% |
63,428
+54,162
| +585% | +$439K |
|
3897
LoveSac
LOVE
$248M
| $475K | ﹤0.01% |
8,803
-5,552
| -39% | -$266K |
|
3898
CALL
Owens Corning
OC
$11.5B
| $475K | ﹤0.01% |
5,200
+3,700
| +247% | +$340K |
|
|
PLL
3899
DELISTED
Piedmont Lithium
PLL
| $475K | ﹤0.01% |
+6,509
| New | +$366K |
|
3900
Qfin Holdings
QFIN
$1.66B
| $475K | ﹤0.01% |
30,867
+19,468
| +171% | +$364K |
|
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.