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 | |
|---|---|---|---|---|---|---|
6676
Smartbird Inc
BIRD
$20.3M
| $32K | ﹤0.01% |
2,312
+1,622
| +235% | +$30.2K |
|
|
BRDG
6677
PUT
DELISTED
Bridge Investment Group
BRDG
| $32K | ﹤0.01% |
4,800
-3,100
| -39% | -$25.8K |
|
6678
CI&T Inc
CINT
$414M
| $32K | ﹤0.01% |
7,787
+4,145
| +114% | +$18.7K |
|
6679
Clover Health Investments
CLOV
$2.29B
| $32K | ﹤0.01% |
+40,341
| New | +$36.7K |
|
6680
CALL
Columbia Sportswear
COLM
$3.21B
| $32K | ﹤0.01% |
400
+200
| +100% | +$15.9K |
|
|
EPIX
6681
CALL
DELISTED
ESSA Pharma
EPIX
| $32K | ﹤0.01% |
3,800
+2,800
| +280% | +$24.4K |
|
6682
CALL
F&G Annuities & Life
FG
$3.86B
| $32K | ﹤0.01% |
800
-3,500
| -81% | -$146K |
|
6683
GSI Technology
GSIT
$224M
| $32K | ﹤0.01% |
9,503
+2,397
| +34% | +$6.93K |
|
6684
Gray Television
GTN
$417M
| $32K | ﹤0.01% |
5,214
-24,151
| -82% | -$185K |
|
6685
CALL
Fusion Fuel Green
HTOO
$8.57M
| $32K | ﹤0.01% |
549
-405
| -42% | -$19.6K |
|
6686
CALL
Hyster-Yale Materials Handling
HY
$600M
| $32K | ﹤0.01% |
500
+200
| +67% | +$12.8K |
|
6687
CALL
Innoviz Technologies
INVZ
$93.2M
| $32K | ﹤0.01% |
24,000
-142,500
| -86% | -$239K |
|
6688
iShares Core Universal USD Bond ETF
IUSB
$43B
| $32K | ﹤0.01% |
712
+52
| +8% | +$2.37K |
|
6689
PUT
Jakks Pacific
JAKK
$302M
| $32K | ﹤0.01% |
1,300
+1,100
| +550% | +$33.3K |
|
6690
Kite Realty
KRG
$5.88B
| $32K | ﹤0.01% |
1,511
-3,184
| -68% | -$68.5K |
|
6691
CALL
MiMedx Group
MDXG
$636M
| $32K | ﹤0.01% |
4,200
-7,700
| -65% | -$61.9K |
|
6692
PUT
MeiraGTx Holdings
MGTX
$1.11B
| $32K | ﹤0.01% |
5,400
-800
| -13% | -$5.05K |
|
6693
PUT
Microvision
MVIS
$85.7M
| $32K | ﹤0.01% |
17,700
-93,400
| -84% | -$212K |
|
6694
CALL
Napco Security Technologies
NSSC
$1.3B
| $32K | ﹤0.01% |
800
-1,400
| -64% | -$54.9K |
|
6695
PUT
OFS Capital
OFS
$44.1M
| $32K | ﹤0.01% |
+3,300
| New | +$36.6K |
|
6696
ONE Gas
OGS
$4.9B
| $32K | ﹤0.01% |
505
+443
| +715% | +$27.2K |
|
6697
CALL
Olema Pharmaceuticals
OLMA
$1.03B
| $32K | ﹤0.01% |
2,900
-8,100
| -74% | -$105K |
|
|
PKST
6698
PUT
DELISTED
Peakstone Realty Trust
PKST
| $32K | ﹤0.01% |
2,000
+1,400
| +233% | +$21.5K |
|
6699
POET Technologies
POET
$1.26B
| $32K | ﹤0.01% |
+23,827
| New | +$29.5K |
|
6700
PUT
Rogers Communications
RCI
$18.4B
| $32K | ﹤0.01% |
800
-1,500
| -65% | -$67.9K |
|
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.