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 | |
|---|---|---|---|---|---|---|
351
PUT
Linde
LIN
$235B
| $38.4M | 0.04% |
120,100
+81,100
| +208% | +$25.1M |
|
352
CALL
Datadog
DDOG
$87.5B
| $38.2M | 0.03% |
252,000
+48,300
| +24% | +$7.07M |
|
353
CALL
ServiceNow
NOW
$98.4B
| $38.1M | 0.03% |
342,500
-114,000
| -25% | -$12.8M |
|
354
PUT
DraftKings
DKNG
$11.3B
| $37.9M | 0.03% |
1,944,700
+366,100
| +23% | +$7.77M |
|
355
PUT
Mercado Libre
MELI
$91.2B
| $37.7M | 0.03% |
31,700
-38,000
| -55% | -$41.4M |
|
356
PUT
Diamondback Energy
FANG
$57.1B
| $37.6M | 0.03% |
274,100
+70,200
| +34% | +$9.13M |
|
357
CALL
Twilio
TWLO
$27.8B
| $37.1M | 0.03% |
225,300
+64,900
| +40% | +$11.8M |
|
|
ZEN
358
CALL
DELISTED
ZENDESK INC
ZEN
| $37.1M | 0.03% |
308,100
+141,500
| +85% | +$15.4M |
|
359
CALL
Shell
SHEL
$243B
| $37M | 0.03% |
+674,400
| New | +$35.8M |
|
360
CALL
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$156M
| $36.8M | 0.03% |
89,606
-68,238
| -43% | -$25.1M |
|
361
CALL
ProShares Ultra Bloomberg Natural Gas
BOIL
$422M
| $36.8M | 0.03% |
9,691
+5,164
| +114% | +$39.4M |
|
|
362
Advanced Micro Devices
AMD
$901B
| $36.6M | 0.03% |
334,528
+333,528
| +33,353% | +$39.8M |
|
363
CALL
The Mosaic Company
MOS
$7.24B
| $36.4M | 0.03% |
547,800
-367,200
| -40% | -$18.4M |
|
364
PUT
Eli Lilly
LLY
$1.04T
| $36.4M | 0.03% |
127,200
-77,000
| -38% | -$19.8M |
|
365
CALL
Amgen
AMGN
$198B
| $36.4M | 0.03% |
150,400
+42,800
| +40% | +$9.83M |
|
366
Palantir
PLTR
$299B
| $36.3M | 0.03% |
2,643,309
+1,542,706
| +140% | +$20.6M |
|
367
CALL
Etsy
ETSY
$7.64B
| $36.3M | 0.03% |
291,800
+69,000
| +31% | +$10.3M |
|
368
PUT
Match Group
MTCH
$8.87B
| $36.1M | 0.03% |
332,300
+51,800
| +18% | +$5.72M |
|
|
MRO
369
CALL
DELISTED
Marathon Oil Corporation
MRO
| $36.1M | 0.03% |
1,439,000
+710,600
| +98% | +$15.3M |
|
370
PUT
Peloton Interactive
PTON
$2.71B
| $35.7M | 0.03% |
1,352,900
+5,100
| +0.4% | +$146K |
|
371
CALL
Trade Desk
TTD
$8.26B
| $35.7M | 0.03% |
515,300
+88,500
| +21% | +$6.39M |
|
372
ProShares UltraPro QQQ
TQQQ
$34.1B
| $35.7M | 0.03% |
+1,226,336
| New | +$35.3M |
|
373
CALL
Nutrien
NTR
$32.9B
| $35.6M | 0.03% |
342,500
+272,100
| +387% | +$22.5M |
|
|
374
CALL
DraftKings
DKNG
$11.3B
| $35.5M | 0.03% |
1,821,100
-379,700
| -17% | -$8.06M |
|
375
PUT
Pinterest
PINS
$12.6B
| $35.4M | 0.03% |
1,439,800
-118,200
| -8% | -$3.23M |
|
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.