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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
DM
3401
PUT
DELISTED
Desktop Metal, Inc.
DM
| $767K | ﹤0.01% |
87,260
+1,930
| +2% | +$12.4K |
|
3402
CALL
Alphatec Holdings
ATEC
$1.43B
| $766K | ﹤0.01% |
55,600
-1,700
| -3% | -$25.2K |
|
3403
PUT
Brookfield
BN
$104B
| $766K | ﹤0.01% |
27,450
-8,700
| -24% | -$235K |
|
3404
CALL
ARS Pharmaceuticals
SPRY
$574M
| $766K | ﹤0.01% |
75,000
+69,600
| +1,289% | +$519K |
|
3405
Cheesecake Factory
CAKE
$4.35B
| $764K | ﹤0.01% |
21,152
+13,154
| +164% | +$457K |
|
3406
CALL
Tanger
SKT
$4.85B
| $764K | ﹤0.01% |
25,900
-49,100
| -65% | -$1.38M |
|
3407
Taboola.com
TBLA
$1.38B
| $763K | ﹤0.01% |
171,970
+56,299
| +49% | +$251K |
|
3408
CALL
Carriage Services
CSV
$646M
| $762K | ﹤0.01% |
28,200
+27,400
| +3,425% | +$686K |
|
3409
Keysight
KEYS
$51.8B
| $762K | ﹤0.01% |
+4,876
| New | +$750K |
|
3410
McDonald's
MCD
$194B
| $761K | ﹤0.01% |
+2,700
| New | +$785K |
|
3411
CALL
NewMarket
NEU
$7.25B
| $761K | ﹤0.01% |
1,200
-3,700
| -76% | -$2.22M |
|
3412
CALL
ONE Gas
OGS
$5.12B
| $761K | ﹤0.01% |
11,800
+11,600
| +5,800% | +$712K |
|
3413
PUT
Sana Biotechnology
SANA
$913M
| $760K | ﹤0.01% |
+76,000
| New | +$569K |
|
3414
PUT
Antero Midstream
AM
$10.3B
| $759K | ﹤0.01% |
54,000
+19,500
| +57% | +$249K |
|
3415
Kyndryl
KD
$2.95B
| $758K | ﹤0.01% |
34,868
-25,301
| -42% | -$538K |
|
3416
Manitowoc
MTW
$525M
| $756K | ﹤0.01% |
53,516
+52,690
| +6,379% | +$782K |
|
3417
PUT
Smith & Wesson
SWBI
$659M
| $756K | ﹤0.01% |
43,600
-20,900
| -32% | -$301K |
|
3418
CALL
Woodward
WWD
$24.6B
| $755K | ﹤0.01% |
4,900
-5,400
| -52% | -$760K |
|
3419
PUT
OneWater Marine
ONEW
$224M
| $754K | ﹤0.01% |
26,800
+4,700
| +21% | +$127K |
|
3420
CALL
Vanguard S&P 500 Growth ETF
VOOG
$25.3B
| $753K | ﹤0.01% |
16,800
+10,200
| +155% | +$493K |
|
3421
TechnipFMC
FTI
$29B
| $751K | ﹤0.01% |
+29,941
| New | +$630K |
|
3422
CALL
W.R. Berkley
WRB
$28.4B
| $751K | ﹤0.01% |
12,750
-2,100
| -14% | -$114K |
|
3423
PUT
FLEX LNG
FLNG
$1.68B
| $750K | ﹤0.01% |
29,500
-51,200
| -63% | -$1.4M |
|
|
ACH
3424
PUT
Accendra Health
ACH
$240M
| $750K | ﹤0.01% |
27,100
-300
| -1% | -$6.66K |
|
3425
CALL
Nabors Industries
NBR
$1.12B
| $749K | ﹤0.01% |
8,700
+1,100
| +14% | +$90K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.