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 | |
|---|---|---|---|---|---|---|
|
GOLD
5626
CALL
Gold.com Inc
GOLD
$1.2B
| $95K | ﹤0.01% |
3,100
+100
| +3% | +$2.75K |
|
5627
Direxion Daily AMZN Bull 2X ETF
AMZU
$378M
| $95K | ﹤0.01% |
2,810
+2,710
| +2,710% | +$83.7K |
|
5628
Innoviz Technologies
INVZ
$95M
| $95K | ﹤0.01% |
70,677
-214,696
| -75% | -$361K |
|
5629
PUT
MarketWise
MKTW
$52.5M
| $95K | ﹤0.01% |
2,755
+2,425
| +735% | +$103K |
|
5630
Photronics
PLAB
$1.79B
| $95K | ﹤0.01% |
3,367
-8,342
| -71% | -$248K |
|
5631
PUT
Playtika
PLTK
$1.52B
| $95K | ﹤0.01% |
13,600
-3,900
| -22% | -$28.7K |
|
|
PLYA
5632
DELISTED
Playa Hotels & Resorts
PLYA
| $95K | ﹤0.01% |
9,837
-450
| -4% | -$3.97K |
|
5633
Replimune Group
REPL
$941M
| $95K | ﹤0.01% |
+11,641
| New | +$95.5K |
|
|
TGI
5634
DELISTED
Triumph Group
TGI
| $95K | ﹤0.01% |
6,319
-28,048
| -82% | -$418K |
|
|
TGNA
5635
PUT
DELISTED
TEGNA Inc
TGNA
| $95K | ﹤0.01% |
6,400
-9,400
| -59% | -$140K |
|
5636
CALL
Tenaya Therapeutics
TNYA
$161M
| $95K | ﹤0.01% |
+18,300
| New | +$87.6K |
|
|
UMH
5637
PUT
UMH Properties
UMH
$1.29B
| $95K | ﹤0.01% |
5,900
-2,300
| -28% | -$35.2K |
|
|
SMC
5638
PUT
Summit Midstream
SMC
$426M
| $95K | ﹤0.01% |
+3,400
| New | +$63.5K |
|
|
PRFT
5639
CALL
DELISTED
Perficient Inc
PRFT
| $95K | ﹤0.01% |
1,700
+1,100
| +183% | +$72K |
|
5640
PUT
Acacia Research
ACTG
$428M
| $94K | ﹤0.01% |
17,800
+15,000
| +536% | +$62.6K |
|
5641
AdvanSix
ASIX
$541M
| $94K | ﹤0.01% |
3,306
+3,049
| +1,186% | +$81.5K |
|
5642
CALL
Cushman & Wakefield Ltd
CWK
$3.14B
| $94K | ﹤0.01% |
9,000
+7,900
| +718% | +$79.9K |
|
5643
FMC
FMC
$1.34B
| $94K | ﹤0.01% |
1,481
-65,478
| -98% | -$3.82M |
|
5644
CALL
Hillman Solutions
HLMN
$1.54B
| $94K | ﹤0.01% |
8,900
+7,400
| +493% | +$69.1K |
|
5645
Humacyte
HUMA
$176M
| $94K | ﹤0.01% |
30,412
+10,419
| +52% | +$35K |
|
5646
PUT
Ironwood Pharmaceuticals
IRWD
$696M
| $94K | ﹤0.01% |
10,900
-4,300
| -28% | -$52.2K |
|
|
MESO
5647
PUT
Mesoblast
MESO
$1.84B
| $94K | ﹤0.01% |
18,800
+17,700
| +1,609% | +$37.7K |
|
5648
Outdoor Holding Co
POWW
$249M
| $94K | ﹤0.01% |
34,317
+16,598
| +94% | +$38.8K |
|
5649
CALL
Petco
WOOF
$797M
| $94K | ﹤0.01% |
41,500
-11,000
| -21% | -$27.9K |
|
5650
PUT
Zymeworks
ZYME
$1.61B
| $94K | ﹤0.01% |
9,000
+6,800
| +309% | +$75.5K |
|
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.