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 | |
|---|---|---|---|---|---|---|
3676
Agios Pharmaceuticals
AGIO
$2.2B
| $340K | ﹤0.01% |
+14,834
| New | +$394K |
|
3677
Popular Inc
BPOP
$10.9B
| $340K | ﹤0.01% |
5,927
+4,862
| +457% | +$317K |
|
3678
CALL
HighPeak Energy
HPK
$855M
| $340K | ﹤0.01% |
14,800
+14,100
| +2,014% | +$359K |
|
3679
PUT
Jackson Financial
JXN
$8.44B
| $340K | ﹤0.01% |
9,100
+4,100
| +82% | +$168K |
|
3680
Steel Dynamics
STLD
$36.1B
| $340K | ﹤0.01% |
3,009
-38,288
| -93% | -$4.45M |
|
3681
PUT
Cirrus Logic
CRUS
$6.87B
| $339K | ﹤0.01% |
3,100
+1,300
| +72% | +$127K |
|
3682
CALL
Hyster-Yale Materials Handling
HY
$596M
| $339K | ﹤0.01% |
+6,800
| New | +$249K |
|
3683
CALL
Planet Labs
PL
$7.48B
| $339K | ﹤0.01% |
86,400
-104,100
| -55% | -$466K |
|
|
3684
PUT
Planet Labs
PL
$7.48B
| $339K | ﹤0.01% |
86,500
-1,200
| -1% | -$5.38K |
|
3685
CALL
Protolabs
PRLB
$1.85B
| $338K | ﹤0.01% |
10,200
+4,900
| +92% | +$152K |
|
3686
CALL
ABM Industries
ABM
$2.84B
| $337K | ﹤0.01% |
7,500
-1,700
| -18% | -$78.6K |
|
3687
Amkor Technology
AMKR
$15B
| $337K | ﹤0.01% |
12,960
+10,310
| +389% | +$282K |
|
3688
PUT
Perrigo
PRGO
$1.4B
| $337K | ﹤0.01% |
9,400
+9,100
| +3,033% | +$329K |
|
3689
PUT
Regal Rexnord
RRX
$14B
| $337K | ﹤0.01% |
2,400
-2,000
| -45% | -$290K |
|
3690
PUT
Teucrium Agricultural Fund
TAGS
$19.2M
| $337K | ﹤0.01% |
21,300
-76,900
| -78% | -$2.37M |
|
3691
Teucrium Corn Fund
CORN
$179M
| $336K | ﹤0.01% |
13,339
-24,337
| -65% | -$628K |
|
|
FOLD
3692
CALL
DELISTED
Amicus Therapeutics
FOLD
| $336K | ﹤0.01% |
30,300
+24,600
| +432% | +$303K |
|
3693
CALL
Sun Life Financial
SLF
$46B
| $336K | ﹤0.01% |
7,200
-129,300
| -95% | -$6.22M |
|
3694
PUT
Owens Corning
OC
$11.6B
| $335K | ﹤0.01% |
3,500
-30,700
| -90% | -$2.91M |
|
3695
CALL
Pulse Biosciences
PLSE
$2.27B
| $335K | ﹤0.01% |
99,900
-23,500
| -19% | -$70.9K |
|
3696
PUT
Xylem
XYL
$28.6B
| $335K | ﹤0.01% |
3,200
+600
| +23% | +$62.7K |
|
|
CEQP
3697
DELISTED
Crestwood Equity Partners LP
CEQP
| $335K | ﹤0.01% |
13,460
+13,260
| +6,630% | +$342K |
|
3698
PUT
BWX Technologies
BWXT
$16.2B
| $334K | ﹤0.01% |
5,300
+4,800
| +960% | +$289K |
|
3699
Herc Holdings
HRI
$5.34B
| $334K | ﹤0.01% |
+2,935
| New | +$405K |
|
3700
PUT
Principal Financial Group
PFG
$24B
| $334K | ﹤0.01% |
4,500
-600
| -12% | -$50.9K |
|
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.