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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3026
CALL
Clearway Energy Class C
CWEN
$5B
| $640K | ﹤0.01% |
20,500
+8,000
| +64% | +$257K |
|
3027
PUT
Seres Therapeutics
MCRB
$48.1M
| $639K | ﹤0.01% |
5,640
+5,475
| +3,318% | +$592K |
|
|
SF
3028
CALL
Stifel
SF
$12.3B
| $638K | ﹤0.01% |
16,200
-2,550
| -14% | -$107K |
|
3029
CALL
Ambev
ABEV
$47.3B
| $637K | ﹤0.01% |
226,200
-151,200
| -40% | -$396K |
|
3030
AES
AES
$10.6B
| $637K | ﹤0.01% |
26,477
+25,439
| +2,451% | +$647K |
|
3031
PUT
Thomson Reuters
TRI
$39.4B
| $637K | ﹤0.01% |
4,650
-1,899
| -29% | -$242K |
|
3032
CALL
Global Net Lease
GNL
$1.87B
| $636K | ﹤0.01% |
49,500
-16,000
| -24% | -$220K |
|
|
NKLA
3033
PUT
DELISTED
Nikola Corporation Common Stock
NKLA
| $635K | ﹤0.01% |
17,520
-33
| -0.2% | -$2.17K |
|
|
NARI
3034
CALL
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $635K | ﹤0.01% |
10,300
+10,200
| +10,200% | +$612K |
|
3035
PUT
Ternium
TX
$9.29B
| $631K | ﹤0.01% |
15,300
-200
| -1% | -$7.86K |
|
3036
PUT
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $631K | ﹤0.01% |
6,600
+1,500
| +29% | +$93K |
|
3037
PUT
Aldeyra Therapeutics
ALDX
$91.7M
| $630K | ﹤0.01% |
63,500
-41,400
| -39% | -$293K |
|
3038
Coca-Cola Femsa
KOF
$21.6B
| $630K | ﹤0.01% |
7,835
+5,745
| +275% | +$422K |
|
3039
American Water Works
AWK
$26.3B
| $628K | ﹤0.01% |
4,292
-12,728
| -75% | -$1.88M |
|
3040
Paychex
PAYX
$40.4B
| $628K | ﹤0.01% |
5,487
+2,931
| +115% | +$333K |
|
3041
PUT
Paysafe
PSFE
$407M
| $626K | ﹤0.01% |
36,300
+3,800
| +12% | +$73.9K |
|
3042
UMB Financial
UMBF
$10.7B
| $626K | ﹤0.01% |
+10,862
| New | +$883K |
|
|
NS
3043
CALL
DELISTED
NuStar Energy L.P.
NS
| $625K | ﹤0.01% |
40,000
+9,800
| +32% | +$160K |
|
|
ATCO
3044
CALL
DELISTED
Atlas Corp.
ATCO
| $624K | ﹤0.01% |
167,200
-6,000
| -3% | -$91.7K |
|
3045
PUT
CACI
CACI
$10.8B
| $622K | ﹤0.01% |
+2,100
| New | +$619K |
|
3046
CALL
Intellia Therapeutics
NTLA
$1.5B
| $622K | ﹤0.01% |
16,700
+6,900
| +70% | +$271K |
|
|
TA
3047
PUT
DELISTED
TravelCenters of America LLC
TA
| $622K | ﹤0.01% |
+7,200
| New | +$473K |
|
3048
CALL
Nordic American Tanker
NAT
$1.37B
| $620K | ﹤0.01% |
156,700
-515,200
| -77% | -$1.85M |
|
3049
PUT
Genuine Parts
GPC
$17.1B
| $619K | ﹤0.01% |
3,700
+3,500
| +1,750% | +$590K |
|
3050
PUT
TORM
TRMD
$3.1B
| $619K | ﹤0.01% |
19,900
+15,400
| +342% | +$469K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.